In
STEL
and
TWA
modes, the upper
LCD shows the
(STEL) and 8 hours(TWA).
weighted average of
CO reading for the past 15 minutes
2
The lower
LCD shows the current AIR, DP/WB
temp. and humidity (7722/77232).
(Fig.6)
5
%
%
O
O
STEL
CO
2
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 the
TWA value.
2.It takes at least 5 minutes to calculate
the STEL and TWA value. The LCD
shows "----" (Fig.7) during the first 5
minutes from power on.
Fig.7
The meter features visible and audible
alarm to give warnings when CO
con-
2
centration exceeds the limit. Users can
set up 2 limits:
1. Upper limit: the alarm threshold
requires air conditioning
2. Lower limit: to stop the alarm.
(See page 7
P1.0
to set the alarm limits).
ALARM & OUTPUT
ALARM
%
%
O
O
STEL PPM
CO
2
