{"id":4066,"date":"2017-09-25T21:52:50","date_gmt":"2017-09-26T04:52:50","guid":{"rendered":""},"modified":"2025-07-21T14:12:58","modified_gmt":"2025-07-21T21:12:58","slug":"4066","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/4066","title":{"rendered":"Go Direct Respiration Belt Troubleshooting and FAQs"},"content":{"rendered":"<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\"><a href=\"\/product\/go-direct-respiration-belt\/\">Go Direct<sup>&reg;<\/sup> Respiration Belt<\/a> (<nobr>GDX-RB<\/nobr>)<\/h3>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p><a href=\"\/manuals\/GDX-RB\">Specifications and User Guide<\/a><\/p>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.vernier.com\/wp-content\/uploads\/2019\/12\/product.gdx-rb._hero.001.jpg\" alt=\"\"\/><\/figure>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\">Troubleshooting<\/h3>\n<p><strong>General: <\/strong>Press the power button on the sensor to turn it on. Connect your sensor as described in the <a href=\"https:\/\/www.vernier.com\/til\/get-started\/go-direct\">Getting Started instructions for your device<\/a>. Does the force on sensor read near zero when no force is applied to the strap? Does the sensor read a positive value when pulling on the short strap.<\/p>\n<ul class=\"wp-block-list\">\n<li><strong>Force sensor test:<\/strong> Secure the sensor snugly to the subject using the straps and clips provided. Verify that the green LED is lit above the checkmark on the sensor label. This indicates the sensor is under proper tension. Loosen the strap if the LED above the checkmark is red, as this indicates too much tension is applied to the strap. Breath normally. Verify that a change in force corresponds with each breath.<\/li>\n<\/ul>\n<p class=\"has-very-light-gray-background-color has-background\"><strong>Was the force sensor properly zeroed?<\/strong> In general, before collecting data you should zero the force sensor after it is attached to the subject. This additional step makes measurements more accurate.<\/p>\n<ul class=\"wp-block-list\">\n<li><strong>Respiration rate test:<\/strong> Does the respiration rate read between 12-20 BPM when breathing normally? Count the number of breaths (peaks) observed in a 30 second period on the force channel. Multiply the value obtained by two. This value should be close to the respiration rate reported by the software.<\/li>\n<li><strong>Step count test:<\/strong> Have the subject walk 30 steps with the sensor attached. The number of steps reported should be close to the number of steps reported by the software.<\/li>\n<li><strong>Step rate test:<\/strong> Using the step channel, count the number of steps that occurred in a 10 second interval. Multiply the number of steps by 60 to get steps per minute. The step rate measure should be close to the step rate reported by the software.<\/li>\n<\/ul>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Additional Troubleshooting<\/h3>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/til\/13306\/\">Can I use the Go Direct Respiration Belt for long duration experiments? Can I use this sensor to monitor respiratory patterns overnight?<\/a><\/li>\n<li><a href=\"\/til\/19229\/\">How do I use your Go Direct Respiration Belt with Python?<\/a><\/li>\n<\/ul>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Specifications<\/h3>\n<ul class=\"wp-block-list\">\n<li>Range: 0 to 50 N<\/li>\n<li>Resolution: 0.01 N<\/li>\n<li>Response time: 50 ms<\/li>\n<li>Respiration rate calculation<br \/>\u26ac Sample window: 30 s<br \/>\u26ac Advance interval: 10 s<\/li>\n<li>Step rate calculation:<br \/>\u26ac Sample window: 10 s<br \/>\u26ac Advance interval: 10 s<\/li>\n<li>Maximum chest circumference: 140 cm<br \/>\u26ac Short strap length: 7 cm<br \/>\u26ac Long strap length: 130 cm<\/li>\n<li>Sensor Dimensions: 7.6 cm x 5.7 cm x 2.1 cm (not including strap loops)<\/li>\n<li>Connections:<br \/>\u26ac Wireless: Bluetooth<sup>\u00ae<\/sup> v4.2 (wireless range 30 m unobstructed)<br \/>\u26ac Wired: USB 2.0 full speed<\/li>\n<li>Battery: <a href=\"http:\/\/www.vernier.com\/gdx-bat-300\">300 mA Li-Poly<\/a><br \/>\u26ac Battery Life (single, full charge): ~24 hours continuous data collection<br \/>\u26ac Battery Life (lifetime): 2 \u2013 5 years (typical)<\/li>\n<\/ul>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Calibration<\/h3>\n<p>Calibrate? No. The sensor is set to the stored calibration before shipping. You can choose to calibrate the force sensor using a one-point calibration. Place the sensor on a flat surface with the label facing up. Enter 0 N as the known force. For more information, see <a href=\"\/til\/4011\/\">How do I calibrate my sensor?<\/a><\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Battery Troubleshooting<\/h3>\n<ol class=\"wp-block-list\">\n<li><span style=\"font-weight: 400;\">If the sensor can be turned on when connected by USB but not when disconnected from USB, the battery either needs charging. <\/span><br \/>\u26ac T<span style=\"font-weight: 400;\">ry charging the sensor for several hours and testing again.<\/span><\/li>\n<li>If after charging the battery the sensor turns on while connected via USB and briefly connects to Graphical Analysis but gives repeated communication errors and\/or resets the selected wavelength, then the battery may be bad. <span style=\"font-weight: 400;\">To verify this is a battery issue (and not a bad USB port or cable), try swapping the battery with a working sensor to see if the problem follows the battery or stays with the sensor.<\/span><br \/>\u26ac If the problem stays with the sensor, the battery is probably not the issue.<br \/>\u26ac If the problem follows the battery, <span style=\"font-weight: 400;\">the battery has likely reached its end of life.<\/span><\/li>\n<li>In this state, the sensor cannot be used even if connected by USB, so the battery will need to be replaced. <span style=\"font-weight: 400;\"><a href=\"\/product\/go-direct-300-mah-replacement-battery\/\">Go Direct&reg; 300 mAh Replacement Battery<\/a> (<nobr>GDX-BAT-300<\/nobr>)<\/span><\/li>\n<li>See <a href=\"\/til\/4014\/\">How do I remove or replace a Go Direct battery?<\/a> for more information (including <a href=\"https:\/\/youtu.be\/Lv2yCaL0ruU\">a video<\/a>).<\/li>\n<\/ol>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p class=\"has-text-align-center has-very-light-gray-background-color has-background\"><span style=\"font-weight: 400;\"><strong>Rechargeable batteries are covered by a one-year warranty.<\/strong><\/span><br \/>Batteries <span style=\"font-weight: 400;\">should last two to five years in typical use. <\/span><\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Related Products<\/h3>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/product\/micro-usb-to-usb-c-cable\/\">Micro USB to USB-C Cable<\/a> (<nobr>CB-USB-C-MICRO<\/nobr>)<\/li>\n<li><a href=\"\/product\/go-direct-charge-station\/\">Go Direct<sup>&reg;<\/sup> Charge Station<\/a> (<nobr>GDX-CRG<\/nobr>)<\/li>\n<\/ul>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Replacement Parts<\/h3>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/product\/go-direct-300-mah-replacement-battery\/\">Go Direct&reg; 300 mAh Replacement Battery<\/a> (<nobr>GDX-BAT-300<\/nobr>)<\/li>\n<li><a href=\"\/product\/micro-usb-cable\/\">Micro USB Cable<\/a> (<nobr>CB-USB-MICRO<\/nobr>)<\/li>\n<\/ul>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Specifications and User Guide Troubleshooting General: Press the power button on the sensor to turn it on. Connect your sensor as described in the Getting&#8230;<\/p>\n","protected":false},"author":8971,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[6860,6861,720],"class_list":["post-4066","post","type-post","status-publish","format-standard","hentry","tag-gdx-rb","tag-gdx-rbmain","tag-maintil"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/4066","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\/8971"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/comments?post=4066"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/4066\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=4066"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=4066"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=4066"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}