Compur Statox 4120
9.The option zero adjustment
This option is available for COCl2 sensor heads with measuring range 0.3 ppm only. The zero adjustment of the sensor is started via diagnostic box.
System requirements:
Sensor head EPROM index 18c, control module EPROM index 03a, diagnostic box EPROM index 02.
A zero adjustment must only be done in clean air. It is started with the buttons ZERO + ENT. It should be done before starting a calibration.
The set zero value is not visible.
If no zero adjustment has been done ever, the default value is 0.
After replacing a control module, a new zero setting has to be carried out. The zero value is stored in the control module and is transmitted to the sensor head.
An error message C1 caused by a too high sensor zero current will only be cancelled after a successful self test.
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