6
Short Term Exposure Limit (STEL)
The STEL is the average reading of the gas
concentration for the last 15 minutes.
NOTE: The STEL reading does not appear
until 15 minutes have elapsed.
Time Weighted Average (TWA)
The TWA is the accumulated reading of the
gas concentration since the monitor was
turned on, divided by 8 hours.
Peak Reading (PEAK)
The peak reading is the highest reading since
the monitor was turned on.
NOTE: The display switches back and forth
between “P” and the actual peak reading.
If the preset alarm limits are exceeded, the
monitor goes into alarm, and you should leave
the contaminated area immediately. See Table
A for the preset limits.
Turning the Monitor OFF
Hold the button down, through the “5…4… 3…
2… 1… OFF” sequence.
The monitor is off when the display is blank.
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