Error Code Problem
Solution
Air Temp. Reading (See example of Fig. B)
E02
Air temp. measurement is
under the lower limit
Put the meter in regular room
temperature for 30 minutes, if it still
appear, send back for repair
E03
Air temp. measurement is
over the upper limit
Put the meter in regular room
temperature for 30 minutes, if it still
appear, send back for repair
E31
Temp. sensor or
measuring circuit is
damaged
Send back for repair
Air Humidity Reading (See example of Fig. C)
E04
Air temp. measurement
has error code
Refer to above temperature error
code for problem solving
E11
The RH calibration is
failed
Please re-calibrate the RH, if it still
appear, send back for repair
E34
RH sensor or measuring
circuit is failed
Send back for repair
SPECIFICATION
20
Measuring Range
CO2 : 0 ~ 9999 ppm
Air Temp. : -10
o
C ~ 60
o
C (14
o
F ~ 140
o
F)
Air RH% : 5.0%RH ~ 95.0%RH
Resolution
CO2 : 1ppm
Air temp. : 0.1
o
C / 0.1
o
F
Air RH% : 0.1%RH
Accuracy
CO2 : 50ppm ±5% of reading
Air temp. : ±0.6
o
C, ±1.0
o
F;
Air RH% : ±3%RH
(at 25
o
C
, 10 ~ 90% RH )
±5%RH
(at 25
o
C
, <10% & >90% RH )
Response
CO2 : <2 mins
（
90
％
step change
）
Air temp.: <2 mins
（
90% step change
）
Air RH% : <10 mins (90% step change
）
Max/Min function
Included
Air quality level
（
CO2 concentration
）
Good: <700ppm (Programmable by user)
Normal: 700~1000ppm (Programmable by user)
Poor: > “Normal”.
Alarm
Alarm: >1000ppm (Programmable by user)
Sampling rate
1sec ~ 04:59:59
Memory points
15999 points
Operating Condition
-10~50
o
C, 5~80%RH (Be sure to avoid condense)
Storage Condition
-20~60
o
C, 5~90%RH (be sure to avoid condense)
Display
LCD & green LED
Power Supply
DC5V (+/-10%),>=500mA.
