Computed Gas Exposures
To avoid possible personal injury, do not deactivate the detector
during a work shift. The detector automatically resets the TWA,
STEL, and MAX gas exposures during start-up. If the detector is
reactivated during a work shift, the new values will not reflect the
entire work shift.
Table 7. Computed Gas Exposures
Time-weighted average based on an
Short-term exposure limit (STEL) to
gas based on a 15-minute period.
Maximum (MAX) concentration
encountered during a work shift.
*For oxygen, it is the highest or the lowest value from
Viewing Gas Exposures
simultaneously. The LCD displays the TWA
gas exposure first.
2. Then the LCD displays the STEL gas exposure.
3. Then the LCD displays the MAX gas exposure.
For oxygen detectors, press
maximum low and maximum high levels of oxygen exposure.
simultaneously to view both the