ACG+
Service & Troubleshooting Manual
Int. Approved
Document ref: P0149-825-00
October 2022
Page 36 of 37
Copyright © 2022 Analox Ltd. All Rights Reserved.
Commercial in Confidence
5.4
VOC Sensor cannot calibrate
When calibrating you need the right gases for both high and low calibration points of the ACG+ (see
5.1)
1]
Fit the 0.5 LPM gas flow regulator accessory or suitable regulator to the calibration gas
bottle.
2]
Connect the outlet of the regulator to the inlet/calibration gas connector accessory and
then connect the inlet/calibration gas connector to the calibration inlet on the ACG+.
Push the fitting on fully until it latches in place.
3]
Open the valve on the flow regulator attached to the bottle and then open the inlet
valve on the front panel. The ACG+ should register that there is flow to the sensors.
4]
Allow 10 minutes for the sensors to settle to stable readings on the calibration gas.
5]
To perform an adjustment, from the main menu select ‘Calibration’ then select the
bottle that is currently attached. The calibration adjustment screen will be shown.
6]
To begin a calibration adjustment, press the ‘Begin calibration’ context but
ton.
7]
Allow the sensors 1 minute to stabilise after calibration and check that the readings
shown are reasonable for the calibration gas applied.
8]
To finish, close the valve on the bottle flow regulator and close the inlet valve on the
front panel then disconnect the calibration connector from the ACG+ by pressing the
release catch and gently removing.
9]
Repeat for a high calibration as necessary. (Note that both low and high calibration
adjustment should be performed in order to reset calibration due notifications).
To exclude any of the sensors from calibration:
•
To exclude sensors,
press ‘OK’ whilst the calibration screen is shown to
allow sensor selection.
Use the up and down buttons to select a sensor to Exclude.
•
To exclude the highlighted sensor, press the
‘Enable/Disable’ context
button. The excluded
sensor will be unchecked and greyed out.
•
To re-
enable the sensor for adjustment, press the ‘Enable/Disable’ context
button again. This
can be repeated for multiple sensors.
•
To exit editing mode so that the adj
ustment can be performed, press the ‘Exit Edit’ context
button.
5.5
COMMS
There are 2 comms fault states. A comms fault state (where the sensor is at fault) and an inlet comms
fault state (where it is an inlet fault). These are both classed as system faults. There are 2 resolutions to
system faults depending on its source.
If it's the sensor then you must contact support. If it's the inlet Check that all connections between the
display module and the chassis board are secure. Restart the ACG+ device to see if the fault clears. If
not, contact support or send it back for repairs.
