TELEDYNE OLDHAM SIMTRONICS Everywhereyoulook BM 25A, Руководство пользователя

Страница: 22 / 72

BM 25A/AW
AREA GAS MONITOR
USER MANUAL
14 NPB25AEN
Revision D.0
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.
3.1.3 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.
3.2 Gas monitor positioning
Position the monitor vertically at the relevant location by taking into account the density of the
gases and the airflow.
3.3 Diffusion mode
In this configuration, the gas monitor is used without additional sampling device; the sensors
monitor the ambient atmosphere.