6. Operations and Functions
6-4. Other functions
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6-4. Other functions
<Suppression Function>
Some types of sensor used with the gas detector are influenced by environmental changes (temperature,
humidity, and other characteristics) or interference gases (interference characteristics) in no small measure,
which affects the reading.
Therefore, the reading might fluctuate around zero even in a normal state with no gas leak.
This function obscures influences by environmental changes and interference gases around zero that have
no meaning for your management rules of gas alarm. This function is used to hide (suppress) the fluctuation
of the reading under the setting value, indicating zero.
<Example: COS 0 - 15 ppm rated range>
0.5
ppm
COS
Suppression Function Disabled
A fluctuation around zero is displayed as the reading.
↓
0.0
ppm
COS
Suppression Function Enabled
A fluctuation under the standard setting value = 6% FS
(0.9 ppm) is hidden with zero.
(Zero suppression)
NOTE
In the maintenance mode, this function is disabled and the fluctuation of the reading under the setting
value is displayed.
CAUTION
A reading under zero is suppressed with the 10% FS suppression.
A reading that gets 10% FS or more under zero is displayed as "-0.0", which prevents an accurate gas
detection and needs the zero adjustment.
