SICK DUSTHUNTER T User Manual

48 GMS800 · Operating Instructions · 8013025 V1.2 · © SICK MAIHAK GmbH
Shutdown
Subject to change without notice
7.1 Safety information on shutting down
7.2 Preparations for shutdown
7.2.1 Secure connected stations
b If required, inform connected external stations that a shutdown is planned.
b Ensure operational safety is not endangered by shutting down, e.g. when the gas
analyzer is used to monitor processes or atmospheres.
b Ensure shutdown does not unintentionally trigger an automatic emergency signal.
7.2.2 Purge sample gas out of the gas analyzer
1 Stop gas feed to the GMS800.
2 Disconnect the GMS800 from external sample gas paths so that no sample gas can
flow into the GMS800.
3 Purge all gas paths in the GMS800 for several minutes with a “dry” neutral gas – for
example with technical grade nitrogen or with a zero gas. Possibly include peripheral
gas paths in this purging operation.
4 Then close off all GMS800
gas connections or close the related valves in the purged
gas path.
7.2.3 Deactivate enclosure pressurization (when fitted)
When the enclosure is fitted with an active system for enclosure pressurization (e.g. inert
gas purging):
b Shut the enclosure pressurization system down ( → Operating Instructions for the system
involved).
NOTICE:
The Analyzer modules are heated to maintain constant internal temperatures.
This also prevents condensation occurring in the measuring system during
operation. However, when the gas analyzer is shutdown condensation could
occur in the Analyzer modules as they cool down. This can damage the
Analyzer modules or make them unusable. – Therefore:
b Always purge the internal sample gas path thoroughly with a “dry” neutral
gas before each shutdown task.
WARNING: Health hazards through dangerous gases
If the GMS800 is used to measure toxic or dangerous gases:
b Thoroughly purge all sample gas paths with a neutral gas (e.g. nitrogen)
before opening sample gas paths or components carrying sample gas.
● Gas analyzer shutdown can affect external stations. It may be necessary to
take the switching logic used by the switching outputs of the GMS800 into
consideration (
→ Supplementary Operating Instructions for “I/O Module”).
● If a data processing system is connected, it may be required to manually
indicate a planned shutdown, so that the system will not interpret the shut-
down as a gas analyzer malfunction.

SICK DUSTHUNTER T Specifications

General

Brand	SICK
Model	DUSTHUNTER T
Category	Measuring Instruments
Language	English