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v2.0

Major VersionM

by Margaret Grattan

Introduction

Under some circumstances, sensors may temporarily exhibit a baseline reading higher than zero due to insufficient warm-up, or cross-sensitivity to other gases. In this case it is worthwhile checking against a standard zero air source.

Zero calibration involves delivering a certified clean air (sometimes called zero air) source to the sensor head and monitoring the response. If a non-zero reading is given, an adjustment is made so that the monitor reports zero concentration.

This guide will walk you through the steps to zero calibrate Type 1 sensor heads using a Series 500, 300, 200 or Ranger handheld monitor.

  1. Set up the calibration accessory. Click here for AS R42. Click  here for RGR CALKIT.
    • Set up the calibration accessory. Click here for AS R42. Click here for RGR CALKIT.

    • Make sure the sensor has warmed up for at least 30 minutes before performing a zero calibration.

  2. Check the tubing type is Tygon.
    • Check the tubing type is Tygon.

    • Check the cylinger pressure to ensure there is enough zero air to perform the calibration (10% of full pressure should be enough).

    • Gently turn the regulator valve anticlockwise and flow the zero air until the reading stabilizes (about 10 minutes).

  3. If you have a Series 200, 300 or 500 handheld monitor, follow these steps: Perform zero calibration If you have a Ranger handheld monitor, follow these steps: Calibration - Gas zero
    • For extra help, watch our video.

Conclusion

For further support, contact Technical Support.

3 other people completed this guide.

StJohn Vuetilovoni

Member since: 02/24/2020

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