The Hazardous Environment Detection Company
Alarms: NEG
TOX1 VOC TOX2
0NEG0
LEL
020.9
OXY
• “NEG” display along with a 1 beat/second
audible/visual alarm indicates indicates
that VOC sensor has drifted negative
(below zero) because the sensor was
zeroed in an area containing VOCs.
• Perform “Fresh Air Calibration” in an
area clear of all VOCs.
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