Comet U0110, User Manual

Page: 54 / 74

54
IE-LGR-Uxxxx-16
U3430 _________________________________________
Measured values:
Internal temperature, relative humidity and the concentration
of CO
2
in the air. Dew-point temperature calculated from
the internal temperature and relative humidity.
Ranges:
Temperature: (-
20 to +60) °C
Relative humidity: (0 to 100) %RH without permanent
condensation
(*2)
.
Concentration of CO
2
in the air: (0 to 5000) ppm (range
(0 to 10000) ppm on request)
Dew-point temperature: (-60 to +60)
°C
Accuracy
(*1)
:
Temperature: ± 0.4 °C
Relative humidity:
-
sensor accuracy ±1.8 %RH at 23 ºC in the
range of (0 to 90) %RH
-
hysteresis < ±1 %RH
- non-
linearity < ±1 %RH
- temperature error: see diagrams in Annex 6
CO
2
concentration in the air:
50 + 0.03 × MV [ppm CO
2
at 23 °C and 1013 hPa]
Temperature dependency in range (-20...45)
°C:
typ. ± (1 + MV / 1000) [ppm CO
2
/°C]
MV…measured value
Dew-
point temperature: ±1.5 °C at an ambient
temperature of T< 25
°C and RH >30 %.
For details see diagrams in Annex 3 .
Response time (air flow 1 m/s approx.)
(*2)
:
Temperature: t
63
< 2 min, t
90
< 8 min (temperature step
20 °C)
Relative humidity: t
63
< 45 s, t
90
< 4 min, t
99
<4 h.
(Measured at constant temperature for 30%
humidity step)
CO
2
concentration in the air: according to the set CO
2
Measuring interval (2 min / 10 min)
Display resolution:
Temperature incl. dew-
point temperature: 0.1 °C
Relative humidity: 0.1 %RH
CO
2
concentration in air: 1 ppm
Recommended calibration interval:
1 year
(*1)
During battery charging temporary measurement
inaccuracy can occur.
(*2)
Important information is provided in the chapter
“Models produced – U3430”