ACG+
Service & Troubleshooting Manual
Int. Approved
Document ref: P0149-825-00
October 2022
Page 37 of 37
Copyright © 2022 Analox Ltd. All Rights Reserved.
Commercial in Confidence
5.6
COSHH Regulations
The ACG+ can be used to test the quality of breathing air to overall protect personnel from hazardous
substances covered by COSHH regulations. The ACG+ measures O
2
,CO
2
, CO,
VOC’s,
and H2O. This is
approved in ACOP9 and BS EN 12021.
However, where the risk assessment for a process highlights a gas that is not measured by the ACG.
I.e., a hazardous substance used, produces a harmful gas in quantities greater than safe exposure
limits, such that it is a danger.
Depending upon the gas i
n question it may be possible to test for the gas using the ACG’s sample
support function with a colorimetric tube specific to the gas. This is a feature that adds flexibility to
the user to use a variety of tubes for any gas type. If this is not possible then the ACG would not be
suitable as the only test method employed under the COSHH regulations.
5.7
Heliox/Trimix mixes
The ACG+ cannot be used to measure Heliox and Trimix mixes as the use of helium will produce
inaccurate reading in the sensors. This inaccuracy is caused by the effect helium has on the internal
flow rates of the gases to the sensors and a direct effect on the sensitivity of some sensors. We have
plans to develop a version of the ACG for this purpose, please contact Analox for information.
5.8
Nitrox gas mixes
The ACG+ can be used to measure Nitrox mixes as the sensor ranges allow measurements of up to
50% Nitrox in O
2
. However, it should be noted that the accuracy of the sensors is not sufficient
enough to comply with standards for Nitrox gas mixes. The new ACG plans should be able to fix this
issue.
