Operation; Switch On - Crowcon Triple Plus+ User Manual

Operation

II. Operation

2.1 Switch On

Press the 'ON' button to switch on the Triple Plus+/Plus+ IR. The instrument
will display the message 'Crowcon Triple Plus+/Plus+ IR' and the serial number.
The unit will test the red alarm LED, sounder and alarm beacons. Press the
UNMARKED button to silence the alarm. Note: if the unit is in the presence of
a hazardous gas the alarm will continue to operate. If alarms are configured to
mute (see MUTE in section 3.2, Configuration Options) then the alarm will not
sound and the alarm LED not flash during the switch on process.
After a short pause the display will change to 'Testing System...' and display
the current battery voltage. If the current date is past a preset calibration due
date, then the instrument will display 'Calibration Due'. See section 3.2 for
configuration options. If there are different sensor modules in the instrument
compared to when it was last used (possibly indicating sensor failure) the mes-
sage 'Sensors changed?' will be displayed. If the instrument's configuration
has been lost or corrupted, then the message 'Loading default data' will be
displayed. With all three of these error/warning messages, the condition must
be accepted by pressing the UNMARKED button, indicated on the display with
the word CONTINUE above it.
The instrument can alarm on instantaneous gas levels, and on both short and
long term Time Weighted Average (TWA) gas exposure levels. Note that the
Time Weighted Average toxic gas exposures are reset to zero when the instru-
ment is switched off.
A well charged battery will cause the display to indicate in excess of 5.8 V; it is
considered flat at 5.0 V. Below 5.3 V a operational instrument will display a low
battery warning; an 'off' instrument will not switch on.
About 5 seconds after the instrument is switched on, the Triple Plus+/Plus+ IR
will complete 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 indication of the
alarm condition will be the word 'ALARM' alternately flashing with the gas value
of the channel in alarm.
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Triple Plus+ and Triple Plus+ IR