15
OPERATION AND USE
7. When a gas is sensed the display will update. Additionally, a series
of LEDs on the front of the instrument will illuminate when the preset
concentrations of the calibration gas are reached. If an alarm condition
exists, based on a preset alarm point, the red (HAZ 3) LED will flash and
the alarm will sound.
The preset levels of the LED warning lights are:
Amber LED/Low
5 - 9.9% LEL
Red LED/Haz1
10.0 - 24.9% LEL
Red LED/Haz2
25.0 - 49.9% LEL
Red LED/Haz3
50.0 - 100% LEL
8. During an alarm condition (factory default at 50% LEL) the display
will flash, red (HAZ 3) LED will flash and an audible alarm will sound
indicating a potentially unsafe environment. To disable the audible alarm
press and release the POWER/MUTE button (A). To enable the alarm
press and release it again.
9. To assist in locating the source of small combustible gas leaks or
surveying areas outdoors or indoors, rotate the thumbwheel located on
the right side of the instrument until a steady ticking sound is heard.
Note:
There is no warm-up for this feature as it uses the LEL sensor that
is already operating.
Move the sensor toward the area suspected of leakage. As the sensor
moves closer to a leak source the tick will increase. When the tick
becomes a steady tone rotate the thumbwheel in a clockwise direction
while keeping the sensor in the same position.
Continued on next page.
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