33 MN1007-C
4.8.1 Alarm options for each measurement mode
Table 6 – Complete set of alarm options
Operating mode Alarm type Description
cps Level Alarm activated when total cps exceeds user-configured level
cps - background Level Alarm activated when cps above background radiation exceeds user-
confi
ured level
cps - background Factor Alarm activated when a multiple of background radiation is exceeded.
Bq/cm
Level Alarm activated when Bq/cm
exceeds user-configured level
Dose rate Level Alarm activated when total dose rate exceeds user-configured level
Dose rate minus
background
Level Alarm activated when dose rate above background dose rate
exceeds user-configured level
Dose rate minus
background
Factor Alarm activated when a multiple of background dose rate is exceeded.
4.8.2 Alarm notification
The operator is alerted to an alarm condition using a combination of audio-visual indicators.
The alarm indications are summarised in the following table.
Table 7 - Alarm indications
Mode Audible alarm Visual Alarm – LEDs Alarm indication on
LCD display
Rate mode – green LED flashing Continuous high pitch
tone
None Flashing symbol
Integration in progress – amber LED
flashing
None None Flashing symbol
Integrated measurement complete
(stop) – source of radiation still
present
Continuous high pitch
tone
3 x indicator LEDs
high frequency flash
Flashing symbol
Integrated measurement complete
(stop) – source of radiation removed
None 3 x indicator LEDs
high frequency flash
None
Once an alarm is triggered, it may only be silenced by moving away from the source of radiation.