In STEL and TWA modes, the main
display shows the
(STEL) and 8 hours(TWA).
weighted average of
CO readings for the past 15 minutes
2
The lower
displays are the current AIR, DP/WB
temperatures and humidity. (Fig.6)
5
%%
OO
STEL
CO2
Fig.6
PPM
NOTE:
1.
If the meter is turned on for shorter
than 15 minutes, the STEL value will
be the weighted average of readings
taken since power on. Same for TWA
values appear before 8 hours.
2.It takes at least 5 minutes to calculate
STEL and TWA. The display shows
“----” (Fig.7) during the first 5 minutes
from power on.
%%
OO
STEL
CO2
Fig.7
The meter features visible and audible
alarm to give warnings when CO
2
concentration exceeds the limit. Users
can set up 2 limits: An upper limit for
alarm threshold that requires air
conditioning and a lower limit to stop
the alarm. (See P1.0 in setup for setting
alarm limits).
ALARM & OUTPUT
ALARM
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