Description
EE80 series set new standards in CO2 measurements for HVAC (Heating, Ventilation and Air-Conditioning). The transmitters resp. switches combine CO2, relative humidity (RH) and temperature (T) measurement in one modern and user-friendly housing. The basic EE80 version for CO2 and T can be easily extended with a RH plug-in module. The CO2 measerument is based on the infrared principle. A patented autocalibration procedure compensates for the aging of the infrared source and ensures outstanding long term stability. EE80 provides analogue outputs (in V or mA). The optional display indicates sequentially the actual measuring data. As one more option a switching output with adjustable switching point and hysteresis is available.
- CO2 Measurement principle: Non-Dispersive Infrared Technology (NDIR)
- CO2 working range: 0 to 2000 or 0 to 5000ppm
- CO2 accuracy at 25°C and 1013 mbar, from 0 to 2000 ppm: < ± (50ppm +2% of measuring value), from 0 to 5000ppm: < ± (50ppm +3% of measuring value)
- CO2 response time: t63 < 195s
- CO2 Temperature dependence: typ. 2ppm CO2/°C
- CO2 long term stability: typ. 20ppm / year
- CO2 sample rate approx. 15s
- Temperature Accuracy at 20°C: ±0.3°C, for the version with current output 4 – 20mA: ±0.7°C
- Relative humidity measurement principle: capacitive
- Working range: 10 to 90% RH
- Accuracy at 20°C: ±3% RH (30 to 70% RH), ±5% (10 to 90% RH)
- Analogue Output: 0 to 2000 / 5000 ppm: 0 – 5V, 0 to 100% RH / 0 to 50°C: 0 – 10V,4 – 20mA RL < 500 Ohm
- Switching Output: ax. switching voltage 50V AC / 60V DC, max. switching load 0.7A at 50V AC 1A at 24V DC, Min. switching load 1mA at 5V DC, Contact material Ag+Au clad
- Supply voltage 24V AC ±20% 15 – 35V DC
