Note 1:
a)
MAXIMUM. MINIMUM:
The unit automatically records maximum reading
and minimum reading after powered on.
b) RESET MAX/MIN:
Press
MODE
button to get MAX or MIN reading, under
MAX or MIN mode,
If current CO
2
reading is near MAX
or MIN, you will not be easy to see the difference.
Long press
MODE
button to reset
Max.or Min values.
CO
2
TWA
ppm
CO
2
STEL
ppm
CO
2
VENT.R
lps
%
ppm
CO
2
VENT.R
cfm/p
ppm
TWA,STEL,lps%,cfm/p
Note 2
(98138.98139.98538.98539 only):
a) TWA: ( Time Weighted Average 8 hours)
The meter keeps updating the reading every minute. If
the meter has been powered on for less than 8 hours,
the TWA value will be the weighted average of readings
since powered on.
b) STEL: (Short-Term Exposure Limit in 15 minutes
weighted average)The meter keeps updating readings
every minute. If the meter has been powered on for less
than 15 minutes, the STEL value shows the weighted
average of reading taken since powered on.
5