GasAlertMicro 5/PID/IR
User Manual
40
Gas Exposures Computed
a Warning
To avoid possible personal injury, do not deactivate
the detector during a work shift. TWA and STEL readings
reset if the detector is deactivated for more than
5 minutes.
Table 8. Computed Gas Exposures
Viewing Gas Exposures
Gas Exposure Description
TWA (toxic only)
Time-weighted average
(TWA) based on accumulated
exposure to toxic gases aver-
aged over a work day accord-
ing to OSHA or ACGIH
method.
STEL (toxic only)
Short-term exposure limit
(STEL) to gas based on a
5-15 minute user selectable
period.
*Peak (MAX)
Peak (MAX) concentration
exposure during work shift.
*For oxygen, it is the highest or the lowest concentration
encountered.
Press and hold C until the
peak (MAX) gas exposures
displays.
The TWA gas exposures
display next.
The STEL gas exposures
display last.
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