Ax60+ Multi-Gas
Service Manual
Int. Approved
Document ref: P0159-803-11
September 2019
Page 25 of 62
Copyright © 2015 Analox Ltd. All Rights Reserved.
Commercial in Confidence
6]
Ensure that the Ax60+ display reads under 1% O2.
7]
Close the regulator valve, acknowledge the alarm and ventilate the area.
8]
Repeat the procedure using the O2 high check gas bottle to check the display reads 20.9% O2
± 1%.
5.4
O
2
sensor calibration adjustment
The Ax60+ O
2
Sensor(s) can be recalibrated to ensure they accurately measure oxygen at the specified levels. Analox can
supply the following calibration kit:
Ax60+ O
2
Calibration Kit comprising:
Part number
Description
Gas type
Contact Analox or source
locally
110-litre 3% carbon dioxide, balance nitrogen
O2 Zero
Contact Analox or source
locally
110 Litre pure air (20.9% oxygen, balance nitrogen) O2 Span
Contact Analox or source
locally
0.5-litre/minute regulator to fit 110-litre bottle
1817-5000
2-metre neoprene tubing
8000-0910A
Push-in flow adaptor
Recalibrating O
2
Sensors is a similar task to checking but it also requires software input. The recalibration procedure can
only be performed on the standard Ax60+ option.
Calibration adjustment is a two-
point process: a ‘zero calibration adjustment’ and a ‘span calibration adjustment’.
NOTE:
ZERO CALIBRATION ADJUSTMENT MUST BE PERFORMED BEFORE SPAN CALIBRATION
ADJUSTMENT.
5.4.1
O
2
sensor zero calibration
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.
To zero calibrate an O
2
Sensor, follow the procedure below (in both text and menu map):
1]
Ensure the Ax60+ is powered on for a minimum of 24hrs 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 Accept/Test to show the Select sensor screen, press Cycle to select the Sensor you want
to calibrate.
5]
Press Accept/Test to select the Sensor. The Zero level (#) screen displays.
6]
Fit the neoprene tubing (1817-5000) to the flow adaptor (8000-0910A).
7]
Fit the flow adaptor into the aperture on the O2 Sensor.
8]
Fit the regulator to the O2 zero gas bottle.
Summary of Contents for Ax60+ Multi-Gas
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