TELEDYNE OLDHAM SIMTRONICS Everywhereyoulook BM 25A, User Manual

Page: 21 / 72

BM 25A/AW
AREA GAS MONITOR
USER MANUAL
NPB25AEN
Revision D.0
13
3 Operation
3.1 Start-up
When starting up the BM 25A/AW for the first time or after a period of inactivity
longer than one month, it is recommended to proceed a charge-discharge cycle.
Moreover, keep in mind that all portable gas monitors must be tested with gas before
each day of use.
3.1.1 Switching on the instrument
•
■
Press the
Enter button (ref. 1).
•
Before displaying current measurements, the BM25 A/AW
performs visual and audible tests during a few seconds and
then displays:
- The TELEDYNE OLDHAM SIMTRONICS logo,
- The software revision and the serial number,
- The alarm thresholds set for each measurement channel.
•
Continue to paragraph
Test Routine and Calibration Overdue
on page 14.
Figure 13: start-up in
standard mode by pressing
the
Enter
button
Note: During normal operation, the BM 25A/AW flashes every 2 minutes to indicate that it
operates correctly. This confidence flash can be canceled and the frequency can be changed
using the COM 2100 software; see page 37.
3.1.2 Selection of the flammable gas on start-up
On start-up, it is possible to change the calibration gas. This option allows the user to measure a
different flammable gas (acetone, methanol, etc.) from that which was originally used (methane
or pentane) to calibrate the instrument. This action allows the instrument software to compensate
and display more accurate readings.
Note: Accuracy for the re-selected gas type is +/- 15%.