Servomex 07931001B, Operator'S Manual

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07931001B revision 6 © Servomex Group Limited. 2020
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The test result data is available on a Modbus register as described in section
12.1.14
The analyzer will now ask for the span-gas to be turned off and the zero-gas to be
turned on.
The process is exactly the same as previously described.
The Laser 3 Plus will automatically proceed to the next step which is zero-gas flush.
The Laser 3 Plus will now wait for the zero-gas to flush through the validation cell.
The flush time is a settable parameter.
There is no involvement from the HMI in this step and the Laser 3 Plus will
automatically proceed to the next step once the zero-gas flush has been completed.
The Laser 3 Plus now again waits for the measurement to stabilize. The process is
exactly the same as described previously
There is no involvement from the HMI in this step and the Laser 3 Plus will
automatically proceed to the next step once the stability check has completed.
The Laser 3 Plus will now check that the validation cell has been purged correctly.
This involves checking that the measured concentration is below a threshold value.
This threshold concentration is user settable via Modbus.
The registers are
•
Final zero threshold
•
Validation cell not purged
Refer to the Modbus map in section 12.1.14 for the register address.
If the measurement is not below the threshold, the Laser 3 Plus will raise a
maintenance required flag with the status “Val Cell Not Purged”. It will be present in
the status log as shown below: