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.
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Set up the calibration accessory. Click here for AS R42. Click here for RGR CALKIT.
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Make sure the sensor has warmed up for at least 30 minutes before performing a zero calibration.
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Check the tubing type is Tygon.
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Check the cylinger pressure to ensure there is enough zero air to perform the calibration (10% of full pressure should be enough).
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Gently turn the regulator valve anticlockwise and flow the zero air until the reading stabilizes (about 10 minutes).
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If you have a Series 200, 300 or 500 handheld monitor, follow these steps: Perform zero calibration
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If you have a Ranger handheld monitor, follow these steps: Calibration - Gas zero
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For extra help, watch our video.
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For further support, contact Technical Support.
For further support, contact Technical Support.
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