Display - Crowcon Detective+ User Manual

Detective+ Detective+
About 10 seconds after the instrument is switched on, the Detective+ will com-
plete its self-tests and indicate the current gas levels.
If the instrument enters an alarm condition then the sounder will be triggered
and the alarm LEDs will flash. Once the gas levels are below alarm levels
(i.e. safe gas levels), the alarm warning may be switched off by pressing the
UNMARKED button. If alarms are muted the red alarm LED will not flash nor
will the alarm sounder sound when the instrument is in alarm - the only indica-
tion of the alarm condition will be the word 'ALARM' alternately flashing with
the gas value of the channel in alarm.

3.2 Display

The information on the display is dependent on the type of sensors installed
in the instrument. For each sensor module installed, the display indicates the
gas concentration, the units of measurement (e.g. ppm) and the channel name
(e.g. H2S). (Each sensor module contains analogue circuitry to support the sen-
sor and a small digital memory which identifies it to the processor along with
calibration data and alarm thresholds.) A quarter of the screen is reserved for
each of a possible 4 gas channels. The normal mode of operation is continuous
real-time gas concentration.
Confidence signals
The green 'power' LED flashes intermittently to give confidence to the user that all is
as it should be.
Detecting Gas Saving Lives
H2S 0.0 ppm
CH4 0.0 %LEL
CO 0.0 ppm
O2 20.9 %
Operation Section 2
7