3.1. Starting up in standard mode
• Briefly press the "On/Off/Enter" key:
• the instrument carries out a visual and audio test phase for a few seconds and indicates:
- the INDUSTRIAL SCIENTIFIC- logo
- the version of the instrument software, date, code and serial number
- the pre-programmed values of the alarm thresholds for each sensor channel
- the current readings.
Note: when the instrument is operating, it emits a visual confirmation flash in order to indicate that
the BM25 gas detector is operating correctly. Upon request or by using COM 2100 software, this
signal can be cancelled and the interval between each signal can be modified.
3.2. Starting up with choice of reference explosive gas
Hold down the "Lighting" or "Acknowledge" button
• switch on the instrument by pressing the “On/Off/Enter” key
• release both buttons
• the display unit shows the INDUSTRIAL SCIENTIFIC- logo for a few seconds while it
performs self-tests. It then displays the list of pre-programmed gases, with the currently
selected gas in the dark field.
Choosing a new reference gas:
• each time you press the “Acknowledge” button, the list scrolls downwards and each time
you press the “Lighting” button, the list scrolls upwards. thirty-one reference gases are
pre-programmed in the range 0-100% LEL (or 0-5% volume CH4). A thirty-second (32)
“Other” lets you select a gas according to your specific requirements. The data specific to
that gas is entered in the workshop.
• Accept the choice: when the chosen gas is displayed, press the “Enter” key.
After a testing phase, the explosive reference gas is now the gas that was selected.
If you do not select a gas after a certain amount of time, the gas detector switches to normal phase
without changing the reference gas, therefore aborting the procedure.
3.3. Start-up test and calibration due
During start-up, the instrument performs a self-test.
• If tests are incorrect, the instrument switches to “fault” mode (audible signal and
continuous visual indication).
• If tests are correct the instrument is ready to use.
CALIBRATION DUE
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