Rki-instruments GD-70D Series Uživatelský manuál stáhnout pdf (Strana 41)

4 Detection Mode 4-4. Other functions

- 41 - GD-70D

Some types of sensor used with the 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).

<Sensitivity Correction

Function>

Some types of sensor used with the detector might

have sensitivity variations after being used for a long

period.

This function compensates the degradation 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 degradation

pattern.

* The zero adjustment is made periodically.

Zero Follower On

Zero Follower Off

* The zero drift of the sensor appears as the reading.

Reading

Zero point

Time

↓

Zero point

Reading

Time

Sensitivity Correction Off

* The sensor sensitivity becomes degraded.

Sensitivity Correction On

* The span is lifted up periodically.

↓

Time

Gas correction

Reading

Gas correction

Reading

Time

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