MultiExact Gas Analyser 5 – Installation and set-up
5.5.3 Remote calibration or automatic validation/calibration
Switch inputs can be set to remote calibration mode (remote cal), automatic
validation/calibration mode (auto val) or disabled so the inputs will have no function,
refer to Figure 17.
The remote calibration function is designed for installations where the analyser is
placed in an inaccessible area and the calibration gas valves are operated
independently of the analyser.
In Remote cal mode, switch input pins 1 – 2 activate a transducer low calibration (as if
the request had been selected from the user interface) and switch input pins 3 – 4
activate a transducer high calibration. Switch input pins 5 – 6 activate the transducer
service in progress (SIP) status, which must be closed before either calibration can be
executed. This is to ensure a calibration can not be executed without a service in
progress status being activated. For example, to carry out a remote low calibration:
remote service in progress (SIP) on
remote service in progress (SIP) off
A calibration will be successfully completed if the current measurement is equal to the
target measurement ± the auto validation tolerance values, see Figure 32. If this
condition is not met a maintenance required status will be raised.
If the switch inputs are set to 'remote
cal' mode the gas control relays will not
be changed from 'sample' during a remote low or high calibration.
See Section 6 for instructions on manual calibration to ensure that your calibration
procedure is correctly configured.
In auto val mode, switch input pins 1 – 2 Initiate an auto validation/calibration
sequence and switch input pins 3 – 4 stop an auto validation/calibration sequence.
1. Select
Set up
Switch Inputs.
2. Use the soft key to select either Auto val, Remote cal or Disabled.
05410001A / Revision 6 45
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