Oldham BM25

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If, after starting up, the date of calibration has expired, the instrument triggers a calibration due
signal on the channel concerned. This calibration due signal can be cancelled and the gas detector is
still in use but must be calibrated.
4
4
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. SHUTTING DOWN
To shut down, hold down the "On/Off" button for three seconds.
On the display unit, the countdown "Stop 3,2,1" is displayed until the instrument is switched off.
In more recent gas detector versions (1/2007), it is necessary to release the ON/OFF button, then
press the key again (follow the on-screen instructions).
When the gas detector is switched off, the set values (sensor adjustment data, alarm thresholds,
histogram, etc.) are saved.
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5
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. DISPLAY BACKLIGHTING
Measurements can be read in dark places by pressing the "Lighting" button. This lighting is
automatically deactivated after 4 minutes.
The display unit backlighting is automatically activated in case of an alarm or fault.
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6
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. SCROLLING THROUGH SET PARAMETERS
When the instrument is in normal operating mode, you can consult a series of data on gas
measurements and also the instrument's internal data (remaining battery time, date and time).
While the instrument is in normal operation, press the "Lighting" button repeatedly to scroll through
the parameters for each sensor channel
- display unit backlighting and date
- measurement location and operator’s name (only with “roundsman” option activated:
see Section 6.1.)
- remaining battery time in a bar graph
- indication of minimums detected by each sensor
- indication of maximums detected by each sensor
- STEL of each “toxic” channel
- TWA of each “toxic” channel
- Message stating “Entrez le code de maintenance” (Enter maintenance code): to access
maintenance menus, specify the four-digit code with the “Acknowledge" and “Lighting”
buttons.
- If the code entered is incorrect: return to normal display
- To exit the list before the end: press the “Acknowledge” button.
6.1. “Roundsman” function
If the instrument is equipped with the "Roundsman" function (optional), a list of names can be pre-
programmed using the COM 2100 software. This list can be consulted manually via the keypad.
To change the name or location, as follows:
- current location/name
- enter