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Operation 3000TA- EU
Teledyne Analytical Instruments 50
alarm as LOW triggers the alarm when the oxygen
concentration falls below the setpoint.
Decide whether you want the alarms to be set as:
Both high (high and high-high) alarms, or
One high and one low alarm, or
Both low (low and low-low) alarms.
2. Are either or both of the alarms to be configured as failsafe?
In failsafe mode, the alarm relay de-energizes in an alarm
condition. For non-failsafe operation, the relay is energized
in an alarm condition. You can set either or both of the
concentration alarms to operate in failsafe or non-failsafe
mode.
3. Are either of the alarms to be latching?
In latching mode, once the alarm or alarms trigger, they will
remain in the alarm mode even if process conditions revert
back to non-alarm conditions. This mode requires an alarm to
be recognized before it can be reset. In the non-latching
mode, the alarm status will terminate when process
conditions revert to non- alarm conditions.
4. Are either of the alarms to be defeated?
The defeat alarm mode is incorporated into the alarm circuit
so that maintenance can be performed under conditions
which would normally activate the alarms.
The defeat function can also be used to reset a latched alarm.
(See procedures, below.)
If you are using password protection, you will need to enter your
password to access the alarm functions. Follow the instructions in
section 4.3.3 to enter your password. Once you have clearance to
proceed, enter the Alarm function.
Press the Alarm button on the front panel to enter the Alarm
function. Make sure that AL–1 is blinking.
AL—1 AL—2
Choose Alarm