MultiExact Gas Analyser
5 – Installation and set-up
5.2.5 Auto validate/calibrate connections (option)
WARNING
The auto validate/calibrate board connections are separated from the
analyser mains circuits by reinforced insulation. The terminals must
only be connected to circuits that are themselves separated from
mains voltages by an isolation method that provides at least
this level of protection.
The analyser can be supplied with auto validate/calibrate relays and switched inputs.
The relays can control solenoid valves in the gas supply system to perform validate or
calibrate routines.
Depending on whether you have chosen to do a remote validate/calibrate routine or
an auto validate/calibrate (see Section 6 and Section 6.2) the pin assignments will
have different functions.
1.
Connect the wires in your cable to the screw terminals on the 9 and 6 pin
connectors provided. Section 2.3 provides information on the rating and size of
cable.
2.
Pins 1 and 2 are connected when sample gas flow is required (Figure 16).
3.
Pins 4 and 5 are connected when low calibration gas is required (Figure 16).
4.
Pins 7 and 8 are connected when high calibration gas is required (Figure 16).
Pin
Use
1
N/O (Sample)
2
COM (Sample)
3
N/C (Sample)
4
N/O (Cal Lo)
5
COM (Cal Lo)
6
N/C (Cal Lo)
7
N/O (Cal Hi)
8
COM (Cal Hi)
9
N/C (Cal Hi)
Figure 16 – Auto validate/calibrate or remote validate relay
9 pin interface connector
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