10 GMS800 · Operating Instructions · 8013025 V1.2 · © SICK MAIHAK GmbH
Important Information
Subject to change without notice
1.4 Intended use
1.4.1 Purpose of the device
GMS800 series gas analyzers measure simultaneously the concentration of one or several
gases in a gas mixture.
Sample gas is extracted at a sampling point and flows from there through the internal
measuring system of the gas analyzer (extractive gas analysis principle).
1.4.2 Installation site
b
Only use the GMS800 indoors.
⊗ Do not use the GMS800
– in potentially explosive atmospheres
– to measure combustible or explosive gases
unless the device version is specified for such use or additional safety precautions are
taken.
1.4.3 Application limitations
Sample gas properties
⊗ Do not feed sample gas to the GMS800
– which contains substances that can chemically attack components carrying sample
gas
– which contains particles that could deposit in the measuring system
– which contains gas components that could condense in the measuring system
Combustible sample gases
A defect in an internal gas path (leak) can create an explosion risk when the GMS800 is
used to measure combustible gases or gases that can create a flammable gas mixture
when mixed with air. For such applications:
b
Check whether the device version is suitable for the application (check the manufac-
turer's specifications).
b
Check which regulations and laws are valid for the installation site in this case.
b
Check whether additional, suitable safety devices must be installed (e.g. pressurization
and enclosure purging with inert gas).
Adverse effects on physical measuring properties
In some applications, certain gas components could interfere with measurement – e.g.
because they create a similar measuring effect which cannot be prevented due to the laws
of nature or technical limitations. Consequence: The measured values could be modified
when the sample gas composition changes even when the concentration of the measured
gas component remains the same.
b
If the sample gas composition has changed in such cases: Carry out an adjustment
with new test gases that correspond to the changed conditions.
This may not be necessary when the GMS800 automatically compensates
such effects.
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