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© Servomex Group Limited. 2020
07931001B revision 6
Now that we have span-gas flushed through the validation cell, and the
measurement is stable, the laser 3 Plus will record the span measurement.
The span measurement will now be available for reading over Modbus.
There is no involvement from the HMI in this step and the Laser 3 Plus will
automatically proceed to the next step once the span measurement has been
recorded
Now that the Laser 3 Plus has taken both the zero and span measurements it can
calculate the validation test result based on the parameters that have been set by
the user.
The table below shows the data used in the test result calculation and the
calculation steps that give the validation test result.
Data used in the calculation
ValPassLevel
User settable. This is the threshold for the validation result
ValConc
User settable. The concentration of the validation gas
ValTol
User settable. The tolerance of the validation gas
span measurement
The calculated span measurement
zero measurement
The calculated zero measurement
The calculation steps
step 1
bumpConc = span measurement - zero measurement
step 2
diff = abs(bumpConc - ValConc)
step 3
result = abs(diff - ValTol) / ValConc * 100
step 4
if result < ValPassLevel the test has PASSED
otherwise the test has FAILED
Содержание 07931001B
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