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Validation
Validation
OI/LS4000/NH3/H2O-EN
Proceed as follows:
Step
Procedure
1
Allow the test gas to flow through the validation cell (flow rate
approx. 60 l/hour).
2
Observe the display of the measured value.
If...
the measured value increases
the measured value does not
increase
Since the process measurement continues to run during valida-
tion, fluctuations in the display of measured value should be ex-
pected; if necessary, the validation should be repeated.
Deviations of 10% are normal. However, if the value is sharply or
repeatedly up-scaled, this may indicate a malfunction of the ana-
lyzer; in such a case, the authorized service should be informed.
Step
Procedure
3
During the measuring operation, depending on the application,
allow nitrogen or compressed air to flow through the validation cell
(flow rate approximately 2-3 l/hr).
Operating instruction LS4000 for NH
then...
the analyzer is reacting to the measured
component contained in the test gas.
the analyzer must be inspected by an au-
thorized service technician.
and H
O
3
2
93
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