24
BM 25A/AW
Instruction Manual
Step 1: Switch the instrument on
■
Press and hold the Acquit button (ref. 1). Press the
Enter button (ref. 2) to switch the instrument on.
■
Release both buttons.
■
When warm-up is complete, the BM 25A/AW displays
the list of different gases. The gas currently selected
is highlighted.
Figure 14: press 1 and 2 to
select the calibration gas
Step 2: Select the reference gas
■
Use the Acquit button (ref. 1) to scroll down the list of gas. Thirty-one (31)
combustible gases are available in the library. Choose
Other
to select a gas for
your specific needs.
Note: if a gas is not selected in the allotted time, the monitor will start in normal
mode without changing the reference gas.
■
Press the
Enter
button (ref. 2) to confirm your choice.
■
The BM25 A/AW starts another test routine. Once the test is complete, the selected
gas is now the reference gas.
Test Routine and Calibration Overdue
During warm-up the BM 25A/AW performs a self test and then starts gas
measurement. If the test is not completed successfully, the BM 25A/AW goes into fault
mode (continuous audible and visual signal).
When the calibration date for a sensor is overdue, the BM 25A/AW triggers a
calibration alert for the appropriate channel. This warning message may be dismissed
and the instrument will operate using its previous calibration settings; however, as the
sensors response may have diminished, the instrument should be recalibrated and
tested.
Gas monitor positioning
Position the monitor vertically at the relevant location by taking into account the density
of the gases and the airflow.
Diffusion mode
In this configuration, the gas monitor is used without additional sampling device; the
sensors monitor the ambient atmosphere.
Содержание BM 25A/AW
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