ADM, HBOT & Sub Aspida
User Manual
Int. Approved
Document ref: PSA-811-14
June 2017
Page 34 of 43
Copyright © 2017 Analox Ltd. All Rights Reserved.
Commercial in Confidence
14)
Replace the sensor cap ensuring that the oxygen cell is centrally sited in the gas port with the
white gasket visible around the whole of the gas port. If misaligned, remove the sensor cap,
and adjust the oxygen cell position using the extraction tool. Then refit the cap and recheck the
alignment.
Figure 27
–
Centralised and misaligned sensors
15)
Holding the sensor cap in position, turn the unit over and fit the 4 cross-head screws
(including washers) into the rear of the case as shown in
Figure 28.
Figure 28 - Replace the sensor cap and secure the screws
WARNING:
Any new sensor fitted to a device will take time to settle to a stable reading. For
this reason, once the sensor has been fitted, the device should be left un-powered for at least
2 hours before attempting to power-up and calibrate.
Once the sensor has been allowed to settle, replace the batteries and fit the battery cover. Power the
device and allow the sensor(s) to warm up. The new oxygen sensor
will require calibration
and may be
showing a fault due to an over-range reading (this is possible for a new sensor). To calibrate the oxygen
sensor, follow the instructions in the section 6.2.
NOTE:
The oxygen sensor may require further fresh air calibrations as the sensor continues to settle.
The oxygen reading should be checked frequently in fresh air during the first few hours of operation
with a new oxygen sensor.
