TELEDYNE OLDHAM SIMTRONICS Everywhereyoulook BM 25A, Руководство пользователя

Страница: 29 / 72

BM 25A/AW
AREA GAS MONITOR
USER MANUAL
NPB25AEN
Revision D.0
21
Mandatory parameters for inputs/outputs:
•
Voltages and alternating currents: I = 150 mA max. - U = 30 V max.
•
Voltages and direct currents: I = 150 mA max. - U = 30 V max.
If the gas monitor is used in an explosive atmosphere, it is imperative to consider
output relay parameters, since contact must not impair the intrinsic safety of the gas
monitor. These parameters are mentioned in the paragraph
Special Instructions for
use in explosive atmospheres on page 55. TELEDYNE OLDHAM SIMTRONICS shall
not, in any event, be liable for failure to follow regulations.
3.7 Data transfer
The BM 25A/AW stores gas measurements, alarm and fault events. Those data can later be
downloaded to a Personal Computer thanks to
COM 2100 software.
3.7.1 Stored data
Once turned on, the BM 25A/AW records data in time-stamped frames. The monitor creates a
new frame every time it starts up and every 24 hours. A frame contains:
•
Channels Information
•
Readings for each sensor at a defined recording interval (configurable).
•
Event logs for each channel:
- Alarm
- Fault
- Alarm Reset
- Maintenance operations (programming, calibration, sensor replacement,
zeroing).
3.7.2 Memory capacity
The gas monitor can store approximately 200,000 measurement points. When the memory is
full, oldest data are overwritten (FIFO).
3.7.3 Data storage
Data are stored as long as internal battery is charged. If the BM 25A/AW is not used for a
long period of time and/or main battery is discharged, a lithium battery will take over for a
period of two years max.