Endress+Hauser COY8 Bedienungsanleitung Seite 5

Usage
The zero-point gel can be used to check the quality of the zero point of an oxygen sensor. The
oxygen-depleting zero-point gel enables straight forward and reliable verification, calibration
and adjustment of the zero point of oxygen sensors.
Function
If the sensor is operated in air, it provides the appropriate measuring signal "S
After the sensor has been inserted into the zero-point gel, the signal "S
the "t " point. The value approaches the zero point:
Start
Abb. 3: Sensor signal
Sensor verification, calibration and adjustment meet the increasingly strict requirements regar-
ding the quality of the zero point:
t - Verification of sensor signal

• The residual signal is in the range of < 5 % of S
t - Calibration of sensor signal

• The residual signal is in the range of < 2 % of S
t -Adjustment of sensor signal

• The residual signal is in the range of < 1 % of S
The sensor signal should be in a suitably stable and steady state (i.e. in accordance with the
requirements for stability).
The percentages shown are drawn from practical experience and can be adjusted based on
the customer or application.
air
air
air
".
air
" starts to drop from
COY8
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