RKI Instruments GD-70D Series User Manual

- 51 - GD-70D
<Zero Follower Function>
Some sensors (ESU and SSU types) have
sensitivity variations after being used for a long
period of time.
The zero follower function uses program
manipulation to correct for sensitivity variations in
the zero reading.
<Sensitivity Correction
Function>
ESU type sensors have sensitivity variations after
being used for a long period of time.
The sensitivity correction function compensates for
decreasing gas sensitivity as the sensor gets older.
It periodically adjusts the span based on the
degradation pattern of the sensor.
CAUTION
The sensitivity correction is just an auxiliary function. It uniformly lifts the span up based on the sensor’s
degradation pattern only. Sensitivity correction cannot consider the sensitivity variation of an individual
sensor. To correct the sensitivity variation, you must regularly calibrate the sensor.
* The zero drift is periodically corrected to bring the
reading back to zero.
Zero Follower On
Zero Follower Off
* The zero drift of the sensor appears as the reading.
Reading
Zero point
0
Time
↓
Zero point
0
Reading
Time
Sensitivity Correction Off
* Sensor accuracy decreases.
Sensitivity Correction On
* The span is periodically lifted to
increase sensor accuracy.
↓
0
Time
Gas correction
Reading
Gas
correction
0
Reading
Time

RKI Instruments GD-70D Series Specifications

General

Brand	RKI Instruments
Model	GD-70D Series
Category	Gas Detectors
Language	English