Teledyne 2000A-EU Operating Instructions Manual page 55

Thermal Conductivity Analyzer
3. Are either of the alarms to be latching?
4. Are either of the alarms to be defeated?
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
Set up the Range 1 alarm by moving the blinking over to
arrow keys. Then press Enter. Check the gas application and range limits as
displayed on the screen.
Press enter again to set the alarm setpoints.
Use the
to move to the next screen.
Five parameters can be changed on this screen:
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.
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.
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.)
is blinking.
keys to choose between % and ppm units. Then press Enter
Teledyne Analytical Instruments
Operation 4
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