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3
– Operation
27
Measurements
Reading measurements
The gas measurements are displayed at once on the LCD display in four separate
fields. In each field, the measurement is displayed as follows:
■
Gas concentration
■
Unit (ppm, % vol. or % LEL)
■
Gas type
■
In "5 gas" configuration, channel #5 is displayed alternately with channel #3 at
bottom left
At the bottom of the screen, time, alarm status and wireless communication status
(when applied) are displayed (see page 35).
Figure 17: on the left side, 4-gas monitor with no radio communication. On the right side,
3-gas monitor with radio ON.
Combustible gas concentration measurements can be affected by high or
low oxygen concentrations. Any reading rapidly changing from too high
(exceeding 100% LEL) to too low can in fact indicate a hazardous gas level
higher than the measurement scale.
Display management
Backlit
Press the
button to read measurements in dark areas. Backlit turns off
automatically after 4 minutes. Display automatically illuminates on fault event or alarm
event.
Summary of Contents for BM 25A/AW
Page 1: ...BM 25A AW Area Gas Monitor Part Number NP25AEN Version C 4 User Manual ...
Page 10: ...10 BM 25A AW Instruction Manual Product Overview Figure 2 Product Overview ...
Page 18: ...18 BM 25A AW Instruction Manual ...
Page 34: ...34 BM 25A AW Instruction Manual ...
Page 70: ...70 BM 25A AW Instruction Manual ...
Page 75: ...9 Special Instructions 75 CSA Control Drawing for BM 25A AW Connections ...
Page 78: ...78 BM 25A AW Instruction Manual ...