Ax60+ Multi-Gas
Service Manual
Int. Approved
Document ref: P0159-803-11
September 2019
Page 22 of 62
Copyright © 2015 Analox Ltd. All Rights Reserved.
Commercial in Confidence
5.2.2
CO
2
sensor span calibration (Displayed as Span cal.)
NOTE:
THE SENSOR THAT IS BEING CALIBRATED IS AUTOMATICALLY DISABLED DURING
CALIBRATION. THE OTHER SENSORS CONTINUE TO OPERATE.
NOTE:
CALIBRATION MODE AUTOMATICALLY TIMES OUT AFTER TEN MINUTES.
Standard increments for calibration are factory set at 0.01 %, however, by pressing and holding the
Cycle
button this
increases the increment value x 10 (0.10 %)
To span calibrate a CO
2
Sensor, follow the procedure below (in both text and menu map):
1]
Ensure the Ax60+ is powered on and operating normally.
2]
Press and hold Cycle for 6 seconds to display Top-level Menu.
3]
Press Cycle four times to display Calibration. Press Accept/Test to display Zero cal.
4]
Press Cycle to show Span cal., press Accept/Test to show the Select sensor screen, press
Cycle to select the Sensor you want to calibrate.
5]
Press Accept/Test to show the Span Cal Value screen.
6]
Press Cycle repeatedly to enter the span calibration value you want in 0.01% increments, or
press and hold Cycle to increment the value at 0.10% increments.
7]
To reset the value and start again, repeatedly press Cycle or press and hold Cycle until you
exceed 6.00 %, this will take the value back to 2.50 % and you can cycle through again until
you reach the required
value.
8]
Press Accept/Test to confirm the span calibration value (for example, 3.00 %).
9]
Fit the neoprene tubing (1817-5000) to the flow adaptor (8000-0910A).
10]
Fit the flow adaptor into the aperture on the CO2 Sensor.
11]
Fit the regulator to the CO2 span gas bottle.
12]
Carefully open the regulator valve and allow the span gas to flow across the sensor for 1 to 2
minutes. Do not block the exit of the flow adaptor.
13]
The CO2 reading on the Span level screen will begin to increase. Wait for the reading to
stabilise at (or close to) 3.00 %.
14]
Press Accept/Test to confirm the calibration.
15]
If span calibration is successful the Span msg sent screen is displayed.
Summary of Contents for Ax60+ Multi-Gas
Page 2: ......
