Calibration Accessory (RGR CALKIT) for Gas calibration

Written By: Kyle Alberti (and 2 other contributors)

Difficulty

Moderate

Steps

Time Required

00:10:00 - 00:15:00

Introduction

RGR CALKIT can be used to calibrate all Aeroqual sensor heads except ammonia, perchloroethylene, ozone and dust.

Gas calibration using the RGR CALKIT should always be completed in a location with adequate ventilation.

The calibration accessory has barbed fittings that are intended to fit with 1/8” ID tubing.
Care should be taken in selecting a tubing material that is appropriate for the type of gas that you will be using to calibrate the sensor head.
PVDF tubing is appropriate for most gases but the tubing's datasheet should be consulted for a full list.
Either side of the calibration accessory can be designated the inlet or the outlet.
Not all gas that enters through the inlet exits through the calibration accessory outlet; be advised that some gas exits through the sensor head exhaust. Depending on your calibration gas of choice and concentration levels, you may need to perform this calibration under a fume hood.

Make sure the valve on your flow gas regulator is fully off.
Screw the gas regulator onto your gas cylinder. When the regulator is correctly fitted, the pressure indicator will show the cylinder pressure.
Always point the cylinder and regulator away from yourself and others when attaching or removing a pressure regulator.
Secure the cylinder so it can't be knocked over while the regulator is attached.

Connect tubing to gas source and ventilation.
Either side of the calibration accessory can be designated the inlet or the outlet

Check the cylinder pressure to ensure there's enough gas to perform the calibration (10% of full pressure should be enough).
Gently turn the regulator valve anticlockwise and flow the target gas at >1L/min until the reading stabilizes (about 10 minutes).