
13
OPERATION AND USE
4. All instruments read with a resolution of 10ppm up to 990ppm. The
scale automatically switch to LEL when 990ppm is exceeded with a
resolution of 0.1% LEL.
Optionally all readings may be displayed in LEL only. Readings beyond
100% LEL are indicated by “OL” (overload).
5. It may be necessary to manually zero the instrument based on
company practices and environmental conditions.
⚠
CAUTION: Zeroing should be done in a gas free environment only.
6. When testing high areas or overhead lines the use of the optional
extension adapter will allow a broom handle or painters stick to extend
the instrument to the area where sensing must be accomplished. This
slides onto the battery sleeve and is held in place by the locking nut
assembly.
7. When a gas is sensed the display will update. If an alarm condition
exists, based on a preset alarm point, the red LED will flash and the
alarm will sound.
8. During an alarm condition (factory default at 10% LEL methane) the
display will flash and an audible alarm will sound indicating a potentially
unsafe environment. To disable the audible alarm press and release the
MUTE button (A). To enable the alarm press and release it again.