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.
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