4. Repeat to set the alarms for the other filters.
5. Press SET-UP to exit the alarm set-up.
4.4.2. Alarm Relay
Two alarm relays are built into the alarm relay socket on the back
panel of the Gas Monitor. The Alarm signals are given by opening
and closing the relay contacts. Both relays are closed when the
Monitor is measuring. This means that there is a direct electrical
connection between the defined pins during measurement except
when the Monitor measures a gas concentration which is greater
than the corresponding alarm limit for the gas. When this
concentration is measured, the Monitor breaks the connection
between the pins. The monitor will furthermore activate the
internal beeper and write the following message on the display:
The user can switch off the beeper and the message by pressing
INFO or RESET push-button on the front-panel of the Gas
Monitor.
The alarm relays will continue being activated until all measured
gas concentrations fall below their user-defined alarm limit(s).
Alarm Relay 1:
Alarm Relay 1: correspond to High Alarm Limit 1.
Pin 1 and 2 are Normally closed
Pin 1 and 3 are normally open, see Fig.4
Whenever one or more gases exceed the corresponding high alarm
limit 1, the Monitor breaks the electrical connection between pins 1
& 2 and make electrical connection between pins 1 and 3.
See Fig.5
Alarm Relay 2:
Alarm Relay 2: correspond to High Alarm Limit 2.
Pin 4 and 6 are normally closed
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