9103 Picoammeter bias modes<\/p>\n
This post explains the 9103 picoammeter bias modes and also explains the concept of \u201cfloating\u201d.<\/p>\n
There are 4 picoammeter bias modes:<\/p>\n
No bias<\/strong> \u2013 the current source is connected directly to the picoammeter input<\/p>\n<\/noscript><\/a><\/p>\nInternal<\/strong> \u2013 a low noise DC supply (two 45 V DC batteries in series) provides a bias between the current source and the input of the picoammeter. This application is typically used for providing a +90V bias to a target in a vacuum chamber in order to prevent secondary electrons from leaving the sample. Adding the 90V bias results in a more accurate measurement for both electron and ion current. It is also possible to use regular 9V batteries and so lower internal bias voltages are possible. Batteries are used for the internal bias as they are very clean with no ripple.<\/p>\n<\/noscript><\/a><\/p>\n<\/p>\n<\/p>\n\n\n<\/strong><\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\n\n\nExternal \u2013<\/strong><\/p>\nThere are two external bias options for the 9103, both are limited to 600 V DC.<\/p>\n9103EXTBIASPR has a BNC connector on the back of the 9103 that connects to the customer\u2019s voltage source which needs to be isolated from ground (floating).<\/p>\n9103DBPR (shown below) has two BNC connectors on the front panel of the 9103 and the 9103 floats on the customer\u2019s ground referenced DC voltage source.\u00a0<\/p>\nThe 9103DBPR is the most common external bias option as most voltage sources are referenced to ground (not isolated).<\/p>\nTwo BNC connectors are used to float the 9103 up to as much as +\/- 600V DC with an external low noise voltage source (provided be the user). \u00a0\u00a0 The voltage source is connected to the HV (signal ground) BNC connector and the 9103 and the current source (DUT) is connected to the Input BNC connector.<\/p>\nThe maximum voltage that can be applied in this mode is 600V DC (that is the rating of the BNC input on the 9103 USB picoammeter).<\/p>\n<\/noscript><\/a> External Bias Dual BNC<\/p><\/div>\nFloating<\/strong> \u2013 In this mode the picoammeter signal ground is raised from near chassis ground up to a value as high as +\/- 5000V DC.\u00a0\u00a0 If you were to measure between the signal input and the signal ground reference the voltage would be low (under 1V typically). However measuring the DC voltage from the signal reference to chassis ground the voltage would be high, the floating supply value.<\/p>\n<\/noscript><\/a><\/p>\nWhen floating the 9103 USB picoammeter there are some safety considerations. First of all, the input to the 9103 is changed from a BNC to either a SHV or MHV connector (user specified). These connectors are rated for up to 5kV. The recorder output on the back of the 9103 also floats. For example if you apply a floating voltage of 1000V the recorder output would also measure 1000V with respect to chassis ground. So if you are using the recorder output and also floating the 9103 the meter that you are measuring the recorder output with also needs to be isolated from ground. Finally, to prevent voltage spikes a current limit resistor is placed between the floating supply and the 9103 signal ground.\u00a0\u00a0 The floating mode is typically used to measure the collector output of an electron multiplier or a Faraday cup.<\/p>\nThe maximum float voltage with the latest rev 9103 is +\/- 5000 V DC.\u00a0\u00a0 If your 9103 was purchased before January 2019 then it can only float up to 1500V DC maximum.<\/p>\nThe floating mode cannot be used with either the internal or external bias modes.\u00a0 However you really would not need either of those options as you can float the 9103 up to get what ever bias you need.\u00a0 For example,\u00a0 let’s say you want to measure an ion beam that is at 3000V DC and you wanted to retard the ions by 200V.\u00a0 You could simple set the bias supply to +3200 V DC and you would\u00a0 be retarding the 3000 V beam by 200V DC.<\/p>\nFor all modes of operation the chassis ground of the 9103 USB picoammeter should be connected to the ground on the PC or chamber.<\/p>\nIf you would like more detailed information please contact us via email at the link in the upper right hand corner of our website at www rbdinstruments dot com.<\/p>\n\n\n<\/p>\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"9103 Picoammeter bias modes This post explains the 9103 picoammeter bias modes and also explains the concept of \u201cfloating\u201d. There are 4 picoammeter bias modes: No bias \u2013 the current source is connected directly to the picoammeter input Internal \u2013 … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2589,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[159],"tags":[233,234,7],"class_list":["post-1855","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-9103-usb-picoammeter","tag-bias","tag-floating","tag-picoammeter"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/12\/Floating-the-9103-Functionality-5000V.png?fit=766%2C824&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-tV","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/comments?post=1855"}],"version-history":[{"count":2,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions"}],"predecessor-version":[{"id":4016,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions\/4016"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/2589"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=1855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=1855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=1855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
<\/noscript><\/a><\/p>\nInternal<\/strong> \u2013 a low noise DC supply (two 45 V DC batteries in series) provides a bias between the current source and the input of the picoammeter. This application is typically used for providing a +90V bias to a target in a vacuum chamber in order to prevent secondary electrons from leaving the sample. Adding the 90V bias results in a more accurate measurement for both electron and ion current. It is also possible to use regular 9V batteries and so lower internal bias voltages are possible. Batteries are used for the internal bias as they are very clean with no ripple.<\/p>\n<\/noscript><\/a><\/p>\n<\/p>\n<\/p>\n\n\n<\/strong><\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\n\n\nExternal \u2013<\/strong><\/p>\nThere are two external bias options for the 9103, both are limited to 600 V DC.<\/p>\n9103EXTBIASPR has a BNC connector on the back of the 9103 that connects to the customer\u2019s voltage source which needs to be isolated from ground (floating).<\/p>\n9103DBPR (shown below) has two BNC connectors on the front panel of the 9103 and the 9103 floats on the customer\u2019s ground referenced DC voltage source.\u00a0<\/p>\nThe 9103DBPR is the most common external bias option as most voltage sources are referenced to ground (not isolated).<\/p>\nTwo BNC connectors are used to float the 9103 up to as much as +\/- 600V DC with an external low noise voltage source (provided be the user). \u00a0\u00a0 The voltage source is connected to the HV (signal ground) BNC connector and the 9103 and the current source (DUT) is connected to the Input BNC connector.<\/p>\nThe maximum voltage that can be applied in this mode is 600V DC (that is the rating of the BNC input on the 9103 USB picoammeter).<\/p>\n<\/noscript><\/a> External Bias Dual BNC<\/p><\/div>\nFloating<\/strong> \u2013 In this mode the picoammeter signal ground is raised from near chassis ground up to a value as high as +\/- 5000V DC.\u00a0\u00a0 If you were to measure between the signal input and the signal ground reference the voltage would be low (under 1V typically). However measuring the DC voltage from the signal reference to chassis ground the voltage would be high, the floating supply value.<\/p>\n<\/noscript><\/a><\/p>\nWhen floating the 9103 USB picoammeter there are some safety considerations. First of all, the input to the 9103 is changed from a BNC to either a SHV or MHV connector (user specified). These connectors are rated for up to 5kV. The recorder output on the back of the 9103 also floats. For example if you apply a floating voltage of 1000V the recorder output would also measure 1000V with respect to chassis ground. So if you are using the recorder output and also floating the 9103 the meter that you are measuring the recorder output with also needs to be isolated from ground. Finally, to prevent voltage spikes a current limit resistor is placed between the floating supply and the 9103 signal ground.\u00a0\u00a0 The floating mode is typically used to measure the collector output of an electron multiplier or a Faraday cup.<\/p>\nThe maximum float voltage with the latest rev 9103 is +\/- 5000 V DC.\u00a0\u00a0 If your 9103 was purchased before January 2019 then it can only float up to 1500V DC maximum.<\/p>\nThe floating mode cannot be used with either the internal or external bias modes.\u00a0 However you really would not need either of those options as you can float the 9103 up to get what ever bias you need.\u00a0 For example,\u00a0 let’s say you want to measure an ion beam that is at 3000V DC and you wanted to retard the ions by 200V.\u00a0 You could simple set the bias supply to +3200 V DC and you would\u00a0 be retarding the 3000 V beam by 200V DC.<\/p>\nFor all modes of operation the chassis ground of the 9103 USB picoammeter should be connected to the ground on the PC or chamber.<\/p>\nIf you would like more detailed information please contact us via email at the link in the upper right hand corner of our website at www rbdinstruments dot com.<\/p>\n\n\n<\/p>\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"9103 Picoammeter bias modes This post explains the 9103 picoammeter bias modes and also explains the concept of \u201cfloating\u201d. There are 4 picoammeter bias modes: No bias \u2013 the current source is connected directly to the picoammeter input Internal \u2013 … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2589,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[159],"tags":[233,234,7],"class_list":["post-1855","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-9103-usb-picoammeter","tag-bias","tag-floating","tag-picoammeter"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/12\/Floating-the-9103-Functionality-5000V.png?fit=766%2C824&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-tV","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/comments?post=1855"}],"version-history":[{"count":2,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions"}],"predecessor-version":[{"id":4016,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions\/4016"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/2589"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=1855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=1855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=1855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Internal<\/strong> \u2013 a low noise DC supply (two 45 V DC batteries in series) provides a bias between the current source and the input of the picoammeter. This application is typically used for providing a +90V bias to a target in a vacuum chamber in order to prevent secondary electrons from leaving the sample. Adding the 90V bias results in a more accurate measurement for both electron and ion current. It is also possible to use regular 9V batteries and so lower internal bias voltages are possible. Batteries are used for the internal bias as they are very clean with no ripple.<\/p>\n<\/noscript><\/a><\/p>\n<\/p>\n<\/p>\n\n\n<\/strong><\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\n\n\nExternal \u2013<\/strong><\/p>\nThere are two external bias options for the 9103, both are limited to 600 V DC.<\/p>\n9103EXTBIASPR has a BNC connector on the back of the 9103 that connects to the customer\u2019s voltage source which needs to be isolated from ground (floating).<\/p>\n9103DBPR (shown below) has two BNC connectors on the front panel of the 9103 and the 9103 floats on the customer\u2019s ground referenced DC voltage source.\u00a0<\/p>\nThe 9103DBPR is the most common external bias option as most voltage sources are referenced to ground (not isolated).<\/p>\nTwo BNC connectors are used to float the 9103 up to as much as +\/- 600V DC with an external low noise voltage source (provided be the user). \u00a0\u00a0 The voltage source is connected to the HV (signal ground) BNC connector and the 9103 and the current source (DUT) is connected to the Input BNC connector.<\/p>\nThe maximum voltage that can be applied in this mode is 600V DC (that is the rating of the BNC input on the 9103 USB picoammeter).<\/p>\n<\/noscript><\/a> External Bias Dual BNC<\/p><\/div>\nFloating<\/strong> \u2013 In this mode the picoammeter signal ground is raised from near chassis ground up to a value as high as +\/- 5000V DC.\u00a0\u00a0 If you were to measure between the signal input and the signal ground reference the voltage would be low (under 1V typically). However measuring the DC voltage from the signal reference to chassis ground the voltage would be high, the floating supply value.<\/p>\n<\/noscript><\/a><\/p>\nWhen floating the 9103 USB picoammeter there are some safety considerations. First of all, the input to the 9103 is changed from a BNC to either a SHV or MHV connector (user specified). These connectors are rated for up to 5kV. The recorder output on the back of the 9103 also floats. For example if you apply a floating voltage of 1000V the recorder output would also measure 1000V with respect to chassis ground. So if you are using the recorder output and also floating the 9103 the meter that you are measuring the recorder output with also needs to be isolated from ground. Finally, to prevent voltage spikes a current limit resistor is placed between the floating supply and the 9103 signal ground.\u00a0\u00a0 The floating mode is typically used to measure the collector output of an electron multiplier or a Faraday cup.<\/p>\nThe maximum float voltage with the latest rev 9103 is +\/- 5000 V DC.\u00a0\u00a0 If your 9103 was purchased before January 2019 then it can only float up to 1500V DC maximum.<\/p>\nThe floating mode cannot be used with either the internal or external bias modes.\u00a0 However you really would not need either of those options as you can float the 9103 up to get what ever bias you need.\u00a0 For example,\u00a0 let’s say you want to measure an ion beam that is at 3000V DC and you wanted to retard the ions by 200V.\u00a0 You could simple set the bias supply to +3200 V DC and you would\u00a0 be retarding the 3000 V beam by 200V DC.<\/p>\nFor all modes of operation the chassis ground of the 9103 USB picoammeter should be connected to the ground on the PC or chamber.<\/p>\nIf you would like more detailed information please contact us via email at the link in the upper right hand corner of our website at www rbdinstruments dot com.<\/p>\n\n\n<\/p>\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"9103 Picoammeter bias modes This post explains the 9103 picoammeter bias modes and also explains the concept of \u201cfloating\u201d. There are 4 picoammeter bias modes: No bias \u2013 the current source is connected directly to the picoammeter input Internal \u2013 … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2589,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[159],"tags":[233,234,7],"class_list":["post-1855","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-9103-usb-picoammeter","tag-bias","tag-floating","tag-picoammeter"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/12\/Floating-the-9103-Functionality-5000V.png?fit=766%2C824&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-tV","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/comments?post=1855"}],"version-history":[{"count":2,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions"}],"predecessor-version":[{"id":4016,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions\/4016"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/2589"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=1855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=1855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=1855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
<\/noscript><\/a><\/p>\n<\/p>\n<\/p>\n\n\n<\/strong><\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\n\n\nExternal \u2013<\/strong><\/p>\nThere are two external bias options for the 9103, both are limited to 600 V DC.<\/p>\n9103EXTBIASPR has a BNC connector on the back of the 9103 that connects to the customer\u2019s voltage source which needs to be isolated from ground (floating).<\/p>\n9103DBPR (shown below) has two BNC connectors on the front panel of the 9103 and the 9103 floats on the customer\u2019s ground referenced DC voltage source.\u00a0<\/p>\nThe 9103DBPR is the most common external bias option as most voltage sources are referenced to ground (not isolated).<\/p>\nTwo BNC connectors are used to float the 9103 up to as much as +\/- 600V DC with an external low noise voltage source (provided be the user). \u00a0\u00a0 The voltage source is connected to the HV (signal ground) BNC connector and the 9103 and the current source (DUT) is connected to the Input BNC connector.<\/p>\nThe maximum voltage that can be applied in this mode is 600V DC (that is the rating of the BNC input on the 9103 USB picoammeter).<\/p>\n<\/noscript><\/a> External Bias Dual BNC<\/p><\/div>\nFloating<\/strong> \u2013 In this mode the picoammeter signal ground is raised from near chassis ground up to a value as high as +\/- 5000V DC.\u00a0\u00a0 If you were to measure between the signal input and the signal ground reference the voltage would be low (under 1V typically). However measuring the DC voltage from the signal reference to chassis ground the voltage would be high, the floating supply value.<\/p>\n<\/noscript><\/a><\/p>\nWhen floating the 9103 USB picoammeter there are some safety considerations. First of all, the input to the 9103 is changed from a BNC to either a SHV or MHV connector (user specified). These connectors are rated for up to 5kV. The recorder output on the back of the 9103 also floats. For example if you apply a floating voltage of 1000V the recorder output would also measure 1000V with respect to chassis ground. So if you are using the recorder output and also floating the 9103 the meter that you are measuring the recorder output with also needs to be isolated from ground. Finally, to prevent voltage spikes a current limit resistor is placed between the floating supply and the 9103 signal ground.\u00a0\u00a0 The floating mode is typically used to measure the collector output of an electron multiplier or a Faraday cup.<\/p>\nThe maximum float voltage with the latest rev 9103 is +\/- 5000 V DC.\u00a0\u00a0 If your 9103 was purchased before January 2019 then it can only float up to 1500V DC maximum.<\/p>\nThe floating mode cannot be used with either the internal or external bias modes.\u00a0 However you really would not need either of those options as you can float the 9103 up to get what ever bias you need.\u00a0 For example,\u00a0 let’s say you want to measure an ion beam that is at 3000V DC and you wanted to retard the ions by 200V.\u00a0 You could simple set the bias supply to +3200 V DC and you would\u00a0 be retarding the 3000 V beam by 200V DC.<\/p>\nFor all modes of operation the chassis ground of the 9103 USB picoammeter should be connected to the ground on the PC or chamber.<\/p>\nIf you would like more detailed information please contact us via email at the link in the upper right hand corner of our website at www rbdinstruments dot com.<\/p>\n\n\n<\/p>\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"9103 Picoammeter bias modes This post explains the 9103 picoammeter bias modes and also explains the concept of \u201cfloating\u201d. There are 4 picoammeter bias modes: No bias \u2013 the current source is connected directly to the picoammeter input Internal \u2013 … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2589,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[159],"tags":[233,234,7],"class_list":["post-1855","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-9103-usb-picoammeter","tag-bias","tag-floating","tag-picoammeter"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/12\/Floating-the-9103-Functionality-5000V.png?fit=766%2C824&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-tV","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/comments?post=1855"}],"version-history":[{"count":2,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions"}],"predecessor-version":[{"id":4016,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions\/4016"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/2589"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=1855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=1855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=1855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
<\/p>\n\n\n<\/strong><\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\u00a0<\/p>\n\n\n\nExternal \u2013<\/strong><\/p>\nThere are two external bias options for the 9103, both are limited to 600 V DC.<\/p>\n9103EXTBIASPR has a BNC connector on the back of the 9103 that connects to the customer\u2019s voltage source which needs to be isolated from ground (floating).<\/p>\n9103DBPR (shown below) has two BNC connectors on the front panel of the 9103 and the 9103 floats on the customer\u2019s ground referenced DC voltage source.\u00a0<\/p>\nThe 9103DBPR is the most common external bias option as most voltage sources are referenced to ground (not isolated).<\/p>\nTwo BNC connectors are used to float the 9103 up to as much as +\/- 600V DC with an external low noise voltage source (provided be the user). \u00a0\u00a0 The voltage source is connected to the HV (signal ground) BNC connector and the 9103 and the current source (DUT) is connected to the Input BNC connector.<\/p>\nThe maximum voltage that can be applied in this mode is 600V DC (that is the rating of the BNC input on the 9103 USB picoammeter).<\/p>\n<\/noscript><\/a> External Bias Dual BNC<\/p><\/div>\nFloating<\/strong> \u2013 In this mode the picoammeter signal ground is raised from near chassis ground up to a value as high as +\/- 5000V DC.\u00a0\u00a0 If you were to measure between the signal input and the signal ground reference the voltage would be low (under 1V typically). However measuring the DC voltage from the signal reference to chassis ground the voltage would be high, the floating supply value.<\/p>\n<\/noscript><\/a><\/p>\nWhen floating the 9103 USB picoammeter there are some safety considerations. First of all, the input to the 9103 is changed from a BNC to either a SHV or MHV connector (user specified). These connectors are rated for up to 5kV. The recorder output on the back of the 9103 also floats. For example if you apply a floating voltage of 1000V the recorder output would also measure 1000V with respect to chassis ground. So if you are using the recorder output and also floating the 9103 the meter that you are measuring the recorder output with also needs to be isolated from ground. Finally, to prevent voltage spikes a current limit resistor is placed between the floating supply and the 9103 signal ground.\u00a0\u00a0 The floating mode is typically used to measure the collector output of an electron multiplier or a Faraday cup.<\/p>\nThe maximum float voltage with the latest rev 9103 is +\/- 5000 V DC.\u00a0\u00a0 If your 9103 was purchased before January 2019 then it can only float up to 1500V DC maximum.<\/p>\nThe floating mode cannot be used with either the internal or external bias modes.\u00a0 However you really would not need either of those options as you can float the 9103 up to get what ever bias you need.\u00a0 For example,\u00a0 let’s say you want to measure an ion beam that is at 3000V DC and you wanted to retard the ions by 200V.\u00a0 You could simple set the bias supply to +3200 V DC and you would\u00a0 be retarding the 3000 V beam by 200V DC.<\/p>\nFor all modes of operation the chassis ground of the 9103 USB picoammeter should be connected to the ground on the PC or chamber.<\/p>\nIf you would like more detailed information please contact us via email at the link in the upper right hand corner of our website at www rbdinstruments dot com.<\/p>\n\n\n<\/p>\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"9103 Picoammeter bias modes This post explains the 9103 picoammeter bias modes and also explains the concept of \u201cfloating\u201d. There are 4 picoammeter bias modes: No bias \u2013 the current source is connected directly to the picoammeter input Internal \u2013 … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2589,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[159],"tags":[233,234,7],"class_list":["post-1855","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-9103-usb-picoammeter","tag-bias","tag-floating","tag-picoammeter"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/12\/Floating-the-9103-Functionality-5000V.png?fit=766%2C824&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-tV","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/comments?post=1855"}],"version-history":[{"count":2,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions"}],"predecessor-version":[{"id":4016,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions\/4016"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/2589"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=1855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=1855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=1855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\u00a0<\/p>\n
\n\n\nExternal \u2013<\/strong><\/p>\nThere are two external bias options for the 9103, both are limited to 600 V DC.<\/p>\n9103EXTBIASPR has a BNC connector on the back of the 9103 that connects to the customer\u2019s voltage source which needs to be isolated from ground (floating).<\/p>\n9103DBPR (shown below) has two BNC connectors on the front panel of the 9103 and the 9103 floats on the customer\u2019s ground referenced DC voltage source.\u00a0<\/p>\nThe 9103DBPR is the most common external bias option as most voltage sources are referenced to ground (not isolated).<\/p>\nTwo BNC connectors are used to float the 9103 up to as much as +\/- 600V DC with an external low noise voltage source (provided be the user). \u00a0\u00a0 The voltage source is connected to the HV (signal ground) BNC connector and the 9103 and the current source (DUT) is connected to the Input BNC connector.<\/p>\nThe maximum voltage that can be applied in this mode is 600V DC (that is the rating of the BNC input on the 9103 USB picoammeter).<\/p>\n<\/noscript><\/a> External Bias Dual BNC<\/p><\/div>\nFloating<\/strong> \u2013 In this mode the picoammeter signal ground is raised from near chassis ground up to a value as high as +\/- 5000V DC.\u00a0\u00a0 If you were to measure between the signal input and the signal ground reference the voltage would be low (under 1V typically). However measuring the DC voltage from the signal reference to chassis ground the voltage would be high, the floating supply value.<\/p>\n<\/noscript><\/a><\/p>\nWhen floating the 9103 USB picoammeter there are some safety considerations. First of all, the input to the 9103 is changed from a BNC to either a SHV or MHV connector (user specified). These connectors are rated for up to 5kV. The recorder output on the back of the 9103 also floats. For example if you apply a floating voltage of 1000V the recorder output would also measure 1000V with respect to chassis ground. So if you are using the recorder output and also floating the 9103 the meter that you are measuring the recorder output with also needs to be isolated from ground. Finally, to prevent voltage spikes a current limit resistor is placed between the floating supply and the 9103 signal ground.\u00a0\u00a0 The floating mode is typically used to measure the collector output of an electron multiplier or a Faraday cup.<\/p>\nThe maximum float voltage with the latest rev 9103 is +\/- 5000 V DC.\u00a0\u00a0 If your 9103 was purchased before January 2019 then it can only float up to 1500V DC maximum.<\/p>\nThe floating mode cannot be used with either the internal or external bias modes.\u00a0 However you really would not need either of those options as you can float the 9103 up to get what ever bias you need.\u00a0 For example,\u00a0 let’s say you want to measure an ion beam that is at 3000V DC and you wanted to retard the ions by 200V.\u00a0 You could simple set the bias supply to +3200 V DC and you would\u00a0 be retarding the 3000 V beam by 200V DC.<\/p>\nFor all modes of operation the chassis ground of the 9103 USB picoammeter should be connected to the ground on the PC or chamber.<\/p>\nIf you would like more detailed information please contact us via email at the link in the upper right hand corner of our website at www rbdinstruments dot com.<\/p>\n\n\n<\/p>\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"9103 Picoammeter bias modes This post explains the 9103 picoammeter bias modes and also explains the concept of \u201cfloating\u201d. There are 4 picoammeter bias modes: No bias \u2013 the current source is connected directly to the picoammeter input Internal \u2013 … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2589,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[159],"tags":[233,234,7],"class_list":["post-1855","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-9103-usb-picoammeter","tag-bias","tag-floating","tag-picoammeter"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/12\/Floating-the-9103-Functionality-5000V.png?fit=766%2C824&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-tV","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/comments?post=1855"}],"version-history":[{"count":2,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions"}],"predecessor-version":[{"id":4016,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions\/4016"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/2589"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=1855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=1855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=1855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
External \u2013<\/strong><\/p>\nThere are two external bias options for the 9103, both are limited to 600 V DC.<\/p>\n9103EXTBIASPR has a BNC connector on the back of the 9103 that connects to the customer\u2019s voltage source which needs to be isolated from ground (floating).<\/p>\n9103DBPR (shown below) has two BNC connectors on the front panel of the 9103 and the 9103 floats on the customer\u2019s ground referenced DC voltage source.\u00a0<\/p>\nThe 9103DBPR is the most common external bias option as most voltage sources are referenced to ground (not isolated).<\/p>\nTwo BNC connectors are used to float the 9103 up to as much as +\/- 600V DC with an external low noise voltage source (provided be the user). \u00a0\u00a0 The voltage source is connected to the HV (signal ground) BNC connector and the 9103 and the current source (DUT) is connected to the Input BNC connector.<\/p>\nThe maximum voltage that can be applied in this mode is 600V DC (that is the rating of the BNC input on the 9103 USB picoammeter).<\/p>\n<\/noscript><\/a> External Bias Dual BNC<\/p><\/div>\nFloating<\/strong> \u2013 In this mode the picoammeter signal ground is raised from near chassis ground up to a value as high as +\/- 5000V DC.\u00a0\u00a0 If you were to measure between the signal input and the signal ground reference the voltage would be low (under 1V typically). However measuring the DC voltage from the signal reference to chassis ground the voltage would be high, the floating supply value.<\/p>\n<\/noscript><\/a><\/p>\nWhen floating the 9103 USB picoammeter there are some safety considerations. First of all, the input to the 9103 is changed from a BNC to either a SHV or MHV connector (user specified). These connectors are rated for up to 5kV. The recorder output on the back of the 9103 also floats. For example if you apply a floating voltage of 1000V the recorder output would also measure 1000V with respect to chassis ground. So if you are using the recorder output and also floating the 9103 the meter that you are measuring the recorder output with also needs to be isolated from ground. Finally, to prevent voltage spikes a current limit resistor is placed between the floating supply and the 9103 signal ground.\u00a0\u00a0 The floating mode is typically used to measure the collector output of an electron multiplier or a Faraday cup.<\/p>\nThe maximum float voltage with the latest rev 9103 is +\/- 5000 V DC.\u00a0\u00a0 If your 9103 was purchased before January 2019 then it can only float up to 1500V DC maximum.<\/p>\nThe floating mode cannot be used with either the internal or external bias modes.\u00a0 However you really would not need either of those options as you can float the 9103 up to get what ever bias you need.\u00a0 For example,\u00a0 let’s say you want to measure an ion beam that is at 3000V DC and you wanted to retard the ions by 200V.\u00a0 You could simple set the bias supply to +3200 V DC and you would\u00a0 be retarding the 3000 V beam by 200V DC.<\/p>\nFor all modes of operation the chassis ground of the 9103 USB picoammeter should be connected to the ground on the PC or chamber.<\/p>\nIf you would like more detailed information please contact us via email at the link in the upper right hand corner of our website at www rbdinstruments dot com.<\/p>\n\n\n<\/p>\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"9103 Picoammeter bias modes This post explains the 9103 picoammeter bias modes and also explains the concept of \u201cfloating\u201d. There are 4 picoammeter bias modes: No bias \u2013 the current source is connected directly to the picoammeter input Internal \u2013 … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2589,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[159],"tags":[233,234,7],"class_list":["post-1855","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-9103-usb-picoammeter","tag-bias","tag-floating","tag-picoammeter"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/12\/Floating-the-9103-Functionality-5000V.png?fit=766%2C824&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-tV","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/comments?post=1855"}],"version-history":[{"count":2,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions"}],"predecessor-version":[{"id":4016,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions\/4016"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/2589"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=1855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=1855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=1855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
There are two external bias options for the 9103, both are limited to 600 V DC.<\/p>\n
9103EXTBIASPR has a BNC connector on the back of the 9103 that connects to the customer\u2019s voltage source which needs to be isolated from ground (floating).<\/p>\n
9103DBPR (shown below) has two BNC connectors on the front panel of the 9103 and the 9103 floats on the customer\u2019s ground referenced DC voltage source.\u00a0<\/p>\n
The 9103DBPR is the most common external bias option as most voltage sources are referenced to ground (not isolated).<\/p>\n
Two BNC connectors are used to float the 9103 up to as much as +\/- 600V DC with an external low noise voltage source (provided be the user). \u00a0\u00a0 The voltage source is connected to the HV (signal ground) BNC connector and the 9103 and the current source (DUT) is connected to the Input BNC connector.<\/p>\n
The maximum voltage that can be applied in this mode is 600V DC (that is the rating of the BNC input on the 9103 USB picoammeter).<\/p>\n
<\/noscript><\/a> External Bias Dual BNC<\/p><\/div>\nFloating<\/strong> \u2013 In this mode the picoammeter signal ground is raised from near chassis ground up to a value as high as +\/- 5000V DC.\u00a0\u00a0 If you were to measure between the signal input and the signal ground reference the voltage would be low (under 1V typically). However measuring the DC voltage from the signal reference to chassis ground the voltage would be high, the floating supply value.<\/p>\n<\/noscript><\/a><\/p>\nWhen floating the 9103 USB picoammeter there are some safety considerations. First of all, the input to the 9103 is changed from a BNC to either a SHV or MHV connector (user specified). These connectors are rated for up to 5kV. The recorder output on the back of the 9103 also floats. For example if you apply a floating voltage of 1000V the recorder output would also measure 1000V with respect to chassis ground. So if you are using the recorder output and also floating the 9103 the meter that you are measuring the recorder output with also needs to be isolated from ground. Finally, to prevent voltage spikes a current limit resistor is placed between the floating supply and the 9103 signal ground.\u00a0\u00a0 The floating mode is typically used to measure the collector output of an electron multiplier or a Faraday cup.<\/p>\nThe maximum float voltage with the latest rev 9103 is +\/- 5000 V DC.\u00a0\u00a0 If your 9103 was purchased before January 2019 then it can only float up to 1500V DC maximum.<\/p>\nThe floating mode cannot be used with either the internal or external bias modes.\u00a0 However you really would not need either of those options as you can float the 9103 up to get what ever bias you need.\u00a0 For example,\u00a0 let’s say you want to measure an ion beam that is at 3000V DC and you wanted to retard the ions by 200V.\u00a0 You could simple set the bias supply to +3200 V DC and you would\u00a0 be retarding the 3000 V beam by 200V DC.<\/p>\nFor all modes of operation the chassis ground of the 9103 USB picoammeter should be connected to the ground on the PC or chamber.<\/p>\nIf you would like more detailed information please contact us via email at the link in the upper right hand corner of our website at www rbdinstruments dot com.<\/p>\n\n\n<\/p>\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"9103 Picoammeter bias modes This post explains the 9103 picoammeter bias modes and also explains the concept of \u201cfloating\u201d. There are 4 picoammeter bias modes: No bias \u2013 the current source is connected directly to the picoammeter input Internal \u2013 … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2589,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[159],"tags":[233,234,7],"class_list":["post-1855","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-9103-usb-picoammeter","tag-bias","tag-floating","tag-picoammeter"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/12\/Floating-the-9103-Functionality-5000V.png?fit=766%2C824&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-tV","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/comments?post=1855"}],"version-history":[{"count":2,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions"}],"predecessor-version":[{"id":4016,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions\/4016"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/2589"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=1855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=1855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=1855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Floating<\/strong> \u2013 In this mode the picoammeter signal ground is raised from near chassis ground up to a value as high as +\/- 5000V DC.\u00a0\u00a0 If you were to measure between the signal input and the signal ground reference the voltage would be low (under 1V typically). However measuring the DC voltage from the signal reference to chassis ground the voltage would be high, the floating supply value.<\/p>\n<\/noscript><\/a><\/p>\nWhen floating the 9103 USB picoammeter there are some safety considerations. First of all, the input to the 9103 is changed from a BNC to either a SHV or MHV connector (user specified). These connectors are rated for up to 5kV. The recorder output on the back of the 9103 also floats. For example if you apply a floating voltage of 1000V the recorder output would also measure 1000V with respect to chassis ground. So if you are using the recorder output and also floating the 9103 the meter that you are measuring the recorder output with also needs to be isolated from ground. Finally, to prevent voltage spikes a current limit resistor is placed between the floating supply and the 9103 signal ground.\u00a0\u00a0 The floating mode is typically used to measure the collector output of an electron multiplier or a Faraday cup.<\/p>\nThe maximum float voltage with the latest rev 9103 is +\/- 5000 V DC.\u00a0\u00a0 If your 9103 was purchased before January 2019 then it can only float up to 1500V DC maximum.<\/p>\nThe floating mode cannot be used with either the internal or external bias modes.\u00a0 However you really would not need either of those options as you can float the 9103 up to get what ever bias you need.\u00a0 For example,\u00a0 let’s say you want to measure an ion beam that is at 3000V DC and you wanted to retard the ions by 200V.\u00a0 You could simple set the bias supply to +3200 V DC and you would\u00a0 be retarding the 3000 V beam by 200V DC.<\/p>\nFor all modes of operation the chassis ground of the 9103 USB picoammeter should be connected to the ground on the PC or chamber.<\/p>\nIf you would like more detailed information please contact us via email at the link in the upper right hand corner of our website at www rbdinstruments dot com.<\/p>\n\n\n<\/p>\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"9103 Picoammeter bias modes This post explains the 9103 picoammeter bias modes and also explains the concept of \u201cfloating\u201d. There are 4 picoammeter bias modes: No bias \u2013 the current source is connected directly to the picoammeter input Internal \u2013 … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2589,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[159],"tags":[233,234,7],"class_list":["post-1855","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-9103-usb-picoammeter","tag-bias","tag-floating","tag-picoammeter"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/12\/Floating-the-9103-Functionality-5000V.png?fit=766%2C824&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-tV","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/comments?post=1855"}],"version-history":[{"count":2,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions"}],"predecessor-version":[{"id":4016,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions\/4016"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/2589"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=1855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=1855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=1855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
<\/noscript><\/a><\/p>\nWhen floating the 9103 USB picoammeter there are some safety considerations. First of all, the input to the 9103 is changed from a BNC to either a SHV or MHV connector (user specified). These connectors are rated for up to 5kV. The recorder output on the back of the 9103 also floats. For example if you apply a floating voltage of 1000V the recorder output would also measure 1000V with respect to chassis ground. So if you are using the recorder output and also floating the 9103 the meter that you are measuring the recorder output with also needs to be isolated from ground. Finally, to prevent voltage spikes a current limit resistor is placed between the floating supply and the 9103 signal ground.\u00a0\u00a0 The floating mode is typically used to measure the collector output of an electron multiplier or a Faraday cup.<\/p>\nThe maximum float voltage with the latest rev 9103 is +\/- 5000 V DC.\u00a0\u00a0 If your 9103 was purchased before January 2019 then it can only float up to 1500V DC maximum.<\/p>\nThe floating mode cannot be used with either the internal or external bias modes.\u00a0 However you really would not need either of those options as you can float the 9103 up to get what ever bias you need.\u00a0 For example,\u00a0 let’s say you want to measure an ion beam that is at 3000V DC and you wanted to retard the ions by 200V.\u00a0 You could simple set the bias supply to +3200 V DC and you would\u00a0 be retarding the 3000 V beam by 200V DC.<\/p>\nFor all modes of operation the chassis ground of the 9103 USB picoammeter should be connected to the ground on the PC or chamber.<\/p>\nIf you would like more detailed information please contact us via email at the link in the upper right hand corner of our website at www rbdinstruments dot com.<\/p>\n\n\n<\/p>\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"9103 Picoammeter bias modes This post explains the 9103 picoammeter bias modes and also explains the concept of \u201cfloating\u201d. There are 4 picoammeter bias modes: No bias \u2013 the current source is connected directly to the picoammeter input Internal \u2013 … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2589,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[159],"tags":[233,234,7],"class_list":["post-1855","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-9103-usb-picoammeter","tag-bias","tag-floating","tag-picoammeter"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/12\/Floating-the-9103-Functionality-5000V.png?fit=766%2C824&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-tV","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/comments?post=1855"}],"version-history":[{"count":2,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions"}],"predecessor-version":[{"id":4016,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions\/4016"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/2589"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=1855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=1855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=1855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
When floating the 9103 USB picoammeter there are some safety considerations. First of all, the input to the 9103 is changed from a BNC to either a SHV or MHV connector (user specified). These connectors are rated for up to 5kV. The recorder output on the back of the 9103 also floats. For example if you apply a floating voltage of 1000V the recorder output would also measure 1000V with respect to chassis ground. So if you are using the recorder output and also floating the 9103 the meter that you are measuring the recorder output with also needs to be isolated from ground. Finally, to prevent voltage spikes a current limit resistor is placed between the floating supply and the 9103 signal ground.\u00a0\u00a0 The floating mode is typically used to measure the collector output of an electron multiplier or a Faraday cup.<\/p>\n
The maximum float voltage with the latest rev 9103 is +\/- 5000 V DC.\u00a0\u00a0 If your 9103 was purchased before January 2019 then it can only float up to 1500V DC maximum.<\/p>\n
The floating mode cannot be used with either the internal or external bias modes.\u00a0 However you really would not need either of those options as you can float the 9103 up to get what ever bias you need.\u00a0 For example,\u00a0 let’s say you want to measure an ion beam that is at 3000V DC and you wanted to retard the ions by 200V.\u00a0 You could simple set the bias supply to +3200 V DC and you would\u00a0 be retarding the 3000 V beam by 200V DC.<\/p>\n
For all modes of operation the chassis ground of the 9103 USB picoammeter should be connected to the ground on the PC or chamber.<\/p>\n
If you would like more detailed information please contact us via email at the link in the upper right hand corner of our website at www rbdinstruments dot com.<\/p>\n\n\n
<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
9103 Picoammeter bias modes This post explains the 9103 picoammeter bias modes and also explains the concept of \u201cfloating\u201d. There are 4 picoammeter bias modes: No bias \u2013 the current source is connected directly to the picoammeter input Internal \u2013 … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":2589,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[159],"tags":[233,234,7],"class_list":["post-1855","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-9103-usb-picoammeter","tag-bias","tag-floating","tag-picoammeter"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/12\/Floating-the-9103-Functionality-5000V.png?fit=766%2C824&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p2DEXo-tV","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/comments?post=1855"}],"version-history":[{"count":2,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions"}],"predecessor-version":[{"id":4016,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/posts\/1855\/revisions\/4016"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media\/2589"}],"wp:attachment":[{"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/media?parent=1855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/categories?post=1855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rbdinstruments.com\/blog\/wp-json\/wp\/v2\/tags?post=1855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"\"](\"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/12\/9103-HV-bias.jpg?resize=584%2C388&ssl=1\")
![\"No_bias_functionality\"](\"https:\/\/i0.wp.com\/www.rbdinstruments.com\/blog\/wp-content\/uploads\/2016\/12\/No_bias_functionality.png?ssl=1\")