Inficon SQM-160, Operating Manual

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SQM-160 Operating Manual
3.18 Relay Operation
The four relays of the SQM-160 are physically single-pole, normally-open
(1FormA) relays. However, each can be programmed to act as either
normally-open or normally-closed during SQM-160 operation. It is important to
keep in mind that all relays will open if the SQM-160 is turned off or loses power.
See
section 3.20 on page 3-16 for relay wiring.
To set the relay operating mode:
1
Press Program to enter Program mode.
2
Press Prev to enter the System Menu.
3
Press Next until RELAYS is shown and then press the Control Knob to display
Relay 1.
4
Turn the Control Knob left or right to select NO (normally open) or NC (normally
closed). Press the Control Knob to accept the value and display the next relay.
5
Repeat Step 4 for each of the four relays.
6
Press Program to exit the System Menu and return to normal mode.