Adjustment
GMS800 · Operating Instructions · 8013025 V1.2 · © SICK MAIHAK GmbH 43
Subject to change without notice
6.3 Test gases
6.3.1 Zero gas
General requirements
Zero gas should not normally cause a measuring effect for the measuring components for
which the metrological zero point is adjusted with this gas (nominal value: “0”). A zero gas
cannot therefore contain the measuring components.
Application-specific zero gas
A definite nominal value can also be set for zero gas. This means a zero gas that causes
certain measuring effects can be used in special applications. These effects must be
known quantitatively and considered appropriately when setting the zero gas nominal
value.
NOTICE:
b
Pay primary attention to the information and specifications on test gases in
the Supplementary Operating Instructions for the Analyzer Modules fitted.
● The same zero gas can be used for all measuring components in most
applications.
● Nitrogen (N
2
) is normally used as zero gas with quality “technical” or “top
grade” depending on the application.
● Filtered atmospheric fresh air can be used as zero gas for some applica-
tions.
b
Pay primary attention to the individual information provided on zero gas.
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