Alarms; Low Al1 Alarm - GasTech GTA-4100R Operator's Manual

4.2 Alarms

This section outlines the GTA-4100R indications for low alarm AL1, high alarm AL2, and fault conditions,
including the standard relay action.
NOTE: The Isolate feature of the GTA-4100R allows you to disable the alarm LED's, buzzer, and relays
during calibration procedures and response tests. When calibration mode is activated, the LED's, buzzer, and
relays will not operate as described in this section.
The GTA-4100R activates visual, audible, and relay alarm indicators, when any of the programmed alarm set
points are passed.
4.2.1

Low AL1 Alarm

When the displayed reading passes the programmed low alarm set-point:
• The AL1 ALARM LED flashes
• The buzzer sounds
• The low alarm relay activates
If the AL1 alarm is set to trigger on a rising level and the set point is triggered, the buzzer will sound and the
channel AL1 LED and Common AL1 LED will flash.
If the alarm is set to trigger on a falling level, the buzzer will sound and the channel AL1 LED and Common AL1
LED will flash.
If the low alarm is latching:
If the low alarm has been configured to be latching, and the alarm has not been acknowledged, the panel
buzzer, LED, and relay remain latched after the alarm condition has passed. These alarm indications must then
be de-activated by pressing the "Ack/Reset" button on the front face of the controller, or by initiating a Global
"Ack/Reset" button on the common module.
1. Follow the established procedure for a low alarm condition. If a procedure is not in place, establish
one that is appropriate for your application.
2. When the reading returns to normal, acknowledge the alarm by pressing the Ack/Reset button to
silence the buzzer and turn off the AL1 ALARM LED.
3. Press and hold the Ack/Reset for 3 seconds to reset the alarms.
If the low alarm is non-latching:
1. Follow the established procedure for low alarms. If a procedure is not in place, establish one that is
appropriate for your application.
2. After the reading returns to normal, the GTA-4100R automatically silences the buzzer, turns off the
AL1 ALARM LED and deactivates the applicable alarm relay.
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