5 – Installation and set-up
MultiExact Gas Analyser
•
You can specify a pre-warning time, which will precede the automatic
validation/calibration. During this time, the 'service in progress' status output
(see Section 5.2.4) will be set; the automatic validation/calibration will then be
carried out at the end of the pre-warning time. If automatic validation is cancelled
during this time the gas selection control will not have changed state.
•
You can specify an inerting phase. This ensures that non-inert and sample gases
cannot flow into the analyser one immediately after the other. During this phase,
inert gas (the low or high calibration gas) will be introduced between the two gases
for a preset time. This may be used to prevent potentially dangerous mixtures
occurring
•
You can specify a flushing phase. This phase operates as a delay, after a different
gas is routed into the analyser, before a validation/calibration is carried out.
5.5.2 Automatic validation/calibration sequence
Before you carry out an automatic validation/calibration, you must preset the following
parameters:
Parameter
Use/range
Low target value
Low measurement target value for validate/calibrate
Low target tolerance
Low measurement target tolerance
High target value
High measurement target value for validate/calibrate
High target tolerance
High measurement target tolerance
validation/calibration type
Low, high, low & high or high & low
Mode
Calibration or validation (see Section 5.5.1)
Pre-warning
On or off
Pre-warning time
Only applicable if pre-warning is on. Specifies the length
of the pre-warning period (0 min 1 sec to 59 min 59 sec)
Inerting
On or off
Inert gas
Only applicable if Inerting is on. Specifies the type of
inert gas (high or low)
Inerting time
Only applicable if Inerting is active. Specifies the inerting
time (0 min 30 sec to 59 min 59 sec)
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