OPERATION OF VRAE
2 - 5
Table 2.1
Key
Function in Normal Operation
[MODE]:
Turn on/off the power* and choose
different display mode.
[N/-]:
Toggle on/off the backlight.
[Y/+]:
Alarm test and alarm acknowledge
(turn off latched alarm, turn on pump or
LEL sensor).
* Pressing and holding
[MODE]
key for 5 seconds turns off
the power to the monitor. Monitor will beep once per
second during power-down sequence. Press
[MODE]
key
momentarily to choose different display modes (see Section
2.4 for details).
Display
The VRAE multi gas monitor includes a 2-line, 16-digit dot
matrix LCD display. The LCD shows the following eight
types of displays during normal operation if the
[MODE]
key
is pressed:
•
Real time instantaneous gas concentration in ppm for
toxic gases, % by volume for oxygen (not applicable
to PGM-7840) and both % by volume and %LEL for
combustible gases.
•
Sensor names.