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8018429/1DWP/V3-0/2022-06| SICK A D D E N D U M T O O P E R A T I N G I N S T R U C T I O N S | GMS840
Subject to change without notice
MAINTENANCE 5
5 Maintenance
5.1 Safety information
For GMS841 (ATEX/ IECEx) and GMS842 (
C
CSA
US)
Before commencing maintenance work
Purge the sample gas path for 15 minutes with 60 l/h with a dry, neutral gas before
commencing maintenance work.
5.2 Maintenance interval
● Maintenance interval: 1 year
5.3 Maintenance work on the enclosure
▸ Check all connections for tight seat. Especially check the grounding cable to the cover.
▸ Check the device and the connections for corrosion.
▸ Switch device free from voltage.
▸ Open the device.
Also observe: “Safety measures before opening the enclosure”, page 11.
– Check the inside of the device for contamination.
– Check if the seals are clean and free of damage.
– Check all lines for tight seat.
5.4 Cleaning of the enclosure
WARNING: Observe the safety information
Observe the safety information in Chapter “Opening the enclosure cover”,
page 11.
WARNING: Risk of explosion
▸ Do not carry out work on the device in potentially explosive atmospheres.
▸ Only use tools approved for Ex zones.
WARNING: Endangerment of electrical safety by cleaning the enclosure with
liquids
Cleaning with water or other cleaning liquids can damage the electronics and therefore
compromise safe operation of the device.
▸ Always clean signs and other surfaces only with a damp cloth.
WARNING: Hazardous situation when liquids penetrate the system
If liquids have penetrated the equipment:
▸ Do not touch the device any more.
▸ Shut the device down immediately by disconnecting the main power voltage
at an external station (e.g. pull out the power cable at the socket or switch
off the external power fuse).
▸ Contact the manufacturer’s customer service or other trained skilled
persons able to repair the device.
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