Johnson Matthey TRACERCO T401, User Manual, Page: 15 / 26

5.11 Setting Alarm Trip Levels
The Tracerco T401 is equipped with an alarm function which can be set by the operator. The alarm is a
continuous high-pitched note and operates whenever the monitor reading exceeds a pre-set trip
level. The alarm trip level can be set in either counts / sec or Becquerels / cm
2 mode.
The incremental settings for the alarms are as follows:
Range Increment
0 . 10 1.0
10 . 50 5.0
50 . 100 10.0
100 . 1000 100
1000 . 4000 500
Maximum alarm trip level is 4000 cps.
Range (Becquerels / cm
2
Increment
0 . 1.0 0.1
1.0 . 1.0 1.0
10 . 500 10
Maximum alarm trip level is 500 Bq / cm 2
5.11.1 Sounder Options
One normal press of the speaker button will turn on the sounder which will “click” in response to radiation.
I n t h is ( no n -a la rm ) m od e t h e sp e ak er s ym b o l will b e o n continuously.
A flashing speaker symbol indicates the alarm is set. For details, refer to p age 12.
If the speaker symbol is showing an extended repeat sequence, it indicates that the alarm mode and
sounder are both activated.
If the speaker symbol is absent from the screen, it indicates that both audible response and alarm
setting is OFF.
It should be noted that on switching on, the monitor will retain the previous alarm trip level settings
and speaker status.