Operating the Detector
TM40/40U Rev. (Af), February 2019
47
4
Operating the Detector
This chapter describes how to power up and test the detector. It also includes
some very important safety checks that you should complete before operating
the detector.
4.1
Powering Up
This section describes how to power up the detector. Follow these instructions
carefully to obtain optimal performance from the detector over its lifecycle:
To turn on the detector:
1
Turn on the power.
2
Wait up to 60 seconds for the detector to finish the start-up procedure.
Powering up initiates the following sequence of events:
•
The yellow LED flashes at 4Hz.
•
BIT is executed.
If successful, the green LED flashes at 1Hz, the fault relay contacts close, and
mA output is 4mA.
3
Enter Normal mode.
Caution:
The majority of detectors are used in the default non-latched
alarm mode. Only perform a reset when the latched alarm option
has been programmed.
To reset the detector when it is in a latched alarm state:
•
Disconnect power (Terminal Number 1 or Terminal Number 2).
or
•
Initiate a Manual BIT.
4.2
Safety Precautions
After powering-up, the detector requires almost no attention in order to function
properly, but the following should be noted:
•
Follow the instructions in this guide and refer to the drawings and
specifications.
•
Do not expose the detector to radiation of any kind unless required for testing
purposes.
•
Do not open the detector housing while power is connected.
