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.
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The calibration accessory has barbed fittings that are intended to fit with 1/8” ID tubing.
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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.
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PVDF tubing is appropriate for most gases but the tubing's datasheet should be consulted for a full list.
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Either side of the calibration accessory can be designated the inlet or the outlet.
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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.
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Make sure the valve on your flow gas regulator is fully off.
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Screw the gas regulator onto your gas cylinder. When the regulator is correctly fitted, the pressure indicator will show the cylinder pressure.
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Always point the cylinder and regulator away from yourself and others when attaching or removing a pressure regulator.
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Secure the cylinder so it can't be knocked over while the regulator is attached.
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Connect tubing to gas source and ventilation.
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Either side of the calibration accessory can be designated the inlet or the outlet
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Step 4 Attach the calibration accessory to the sensor head while the head is plugged into the Ranger
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Attach the sensor head to Ranger
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Turn Ranger On
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Attach the calibration accessory to the sensor head
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Check the cylinder pressure to ensure there's enough gas to perform the calibration (10% of full pressure should be enough).
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Gently turn the regulator valve anticlockwise and flow the target gas at >1L/min until the reading stabilizes (about 10 minutes).
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Wait for the gas reading to stabilize on the display of the Ranger
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Press and hold the LEFT arrow key to enter the Settings menu
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Navigate down and selectm 'Calibrate' and then ‘Span Calibration’
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Enter the span adjustment menu and calculate the required gain using the formula
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Adjust the gain value in the Span Calibration menu to match your calculated value
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Press enter
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Wait for the next sensor reading, which will have the new gain applied
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The value is not applied until you press enter
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The new gain value will be applied on the next measurement cycle; the value displayed at the bottom may take 1-2 minutes to update
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Confirm the new reading matches your expected value.
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Exit the span calibration menu.
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Turn off the gas regulator.
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Pack up.
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If you remove the gas sensor head from any Ranger base, and attach it to a different Ranger base, the Span will be retained
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For further support, visit Span calibration, How to test your sensor head , Sensors - VOC, or contact Technical Support.
For further support, visit Span calibration, How to test your sensor head , Sensors - VOC, or contact Technical Support.
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