Riken Keiki TP-70DGII, Руководство по эксплуатации

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6. Operations and Functions 6-4. Other functions
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<Zero Follower Function>
Some types of sensor used with the gas detector might have sensitivity variations after being used for a
long period.
This function corrects the variation of the reading at the zero point (zero drift) among the sensitivity
variations over time by a program manipulation to stabilize the zero point, and works on the electrochemical
type (ESU) and pyrolysis-particle type (SSU).
Zero Follower Function Off
⇒
Zero Follower Function On
* The zero drift of the sensor appears as the
reading. * The zero-adjustment is made periodically.
<Sensitivity Correction Function>
Some types of sensor used with the gas detector might have sensitivity variations after being used for a
long period.
This function compensates the deterioration of the gas sensitivity among the sensitivity variations over time.
It works on the electrochemical type (ESU) and makes the span adjustment by a program manipulation
based on the principled deterioration pattern.
Sensitivity Correction Function Off
⇒
Sensitivity Correction Function On
* The sensor sensitivity becomes deteriorated. * The span is lifted up periodically.
Zero point
Zero point
Reading
Time
Reading
Time
Calibration
Calibration
Reading
Time
Reading
Time
CAUTION
The sensitivity correction function is just an auxiliary function. It uniformly lifts the span up based on the
principled deterioration pattern only and cannot consider the sensitivity variation of an individual sensor.