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Teledyne Analytical Instruments 21
3.3.3.5 ALARM RELAYS
The nine alarm-circuit connector pins connect to the internal alarm
relay contacts. Each set of three pins provides one set of Form C relay
contacts. Each relay has both normally open and normally closed contact
connections. The contact connections are shown in Table 3-4. They are
capable of switching up to 3 amperes at 250 VAC into a resistive load.
The connectors are:
Threshold Alarm 1:
Can be configured as high (actuates when concentration is above
threshold), or low (actuates when concentration is below
threshold).
Can be configured as failsafe or non-failsafe
Configured as latching or non-latching
Can be configured out (defeated).
Threshold Alarm 2:
Can be configured as high (actuates when concentration is above
threshold), or low (actuates when concentration is below
threshold).
System Alarm:
Actuates when power is removed from analyzer.
It is triggered if 4030 fails to ignite after five times.
The System Alarm may be reset by selecting the
STANDBY function in the menu to send to sleep mode,
then press the ENTER or ESCAPE key to restart the
analyzer. However, if the condition that caused the 4030 to
fail ignition is not remedied, the 4030 will likely fail to
ignite again, and the System Alarm will be re-triggered.
Further detail on flame ignition failure can be found in Chapter 4,
Section 4.3.1.