User guide

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MRK-D-0022 V3.1 Aeroqual Series 200, 300 & 500 User Guide
6. Calibration of Sensor Heads
Sensor heads can be calibrated in two ways:
1. Via replacement. Return your sensor head to Aeroqual and purchase a replacement sensor
with a multi-point calibration and new calibration certificate.
2. Manual calibration. The easy calibration procedure is outlined below. Aeroqual supplies a
Calibration Accessory (R42) to facilitate humidity control and delivery of calibration gas to the
sensor head.
6.1. Calibration Procedure
In order to calibrate successfully the following equipment is needed:
 R42 Calibration Accessory
 Inert tubing (Regulator to gas inlet) See table for gas/material compatibility
 0.5 LPM constant flow regulator (eg Calgaz regulator model 715, flow rate 0.5 LPM)
 Span gas in air cylinder
 Zero grade air cylinder
1. Charge R42 Calibration Gas Accessory with 5g of water with water syringe via water inlet.
2. Fit cylinder and regulator to R42 gas inlet via tubing and Luer attachment.
3. Place warmed up Aeroqual sensor head in R42 outlet as shown below. The Aeroqual sensor
head is now ready for zero or span calibration.
Note: The inlet of the sensor head should be inserted into the outlet of the R42 (the inlet of the
sensor head has a mesh cover)
Note: The MS1 and MS2 multi-sensor heads require that the sensor head be inserted in
different positions depending on the sensors being calibrated.
Use this orientation for calibrating PID and CO2 Use this orientation for calibrating CO