{"id":640,"date":"2004-07-06T18:59:00","date_gmt":"2004-07-07T01:59:00","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T07:00:00","slug":"640","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/640","title":{"rendered":"I am performing an experiment that requires both positive and negative voltages to be measured. When using your ULI with a Voltage Probe, it only reads 0 to 5 volts. What can I do to measure both positive and negative voltages?"},"content":{"rendered":"<p>The problem is that the ULI, or SBI, can only read positive voltages. Listed below are several options to read both positive and negative voltages:<\/p>\n<p>A) Use our Instrumentation Amplifier (takes +\/- voltages and amplifies them so that they can be read by the ULI (voltage ranges include +\/- 20 mv, +\/- 200 mv, +\/- 1000 mv.<br \/>\nB) Use our Current and Voltage Probe System. The voltage range using this is +\/- 6V.<br \/>\nC) Put a battery in series with the voltage probe of the ULI to offset the voltage you are measuring by 1.5 volts.<br \/>\nD) Build a simple op-amp circuit to handle the input and feed it to the ULI voltage leads.<br \/>\nE) Use our Go! Link or LabPro interface with a voltage probe.  Both of the newer interfaces have a range of +\/- 10V.<\/p>","protected":false},"excerpt":{"rendered":"<p>The problem is that the ULI, or SBI, can only read positive voltages. Listed below are several options to read both positive and negative voltages:&#8230;<\/p>\n","protected":false},"author":31,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[268,61,108,107,521],"class_list":["post-640","post","type-post","status-publish","format-standard","hentry","tag-cv-bta","tag-cv-din","tag-ina-bta","tag-ina-din","tag-negative-voltages"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/640","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/users\/31"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/comments?post=640"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/640\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=640"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=640"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=640"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}