Datasheet
130
Measuring instruments in green houses or life stock barns are
exposed to a very demanding environment: high humidity levels,
pollutants like fertilizers, herbicides and high ammonia concen-
trations are just a few of the many hazards.
The robust, functional housing of the EE82 with integrated
special filter has been designed for such applications.
The air diffuses through the filter into the instrument enclosure.
Then the air diffuses further through a second membrane filter
integrated in the CO
2
measuring cell.
The CO
2
measurement is based on the non-dispersive infrared
(NDIR) technology. The patented auto-calibration procedure
compensates for aging of the infrared source and guarantees
high reliability, long term stability and eliminates the need of
periodical recalibration in the field.
Measuring ranges of 0...2000/5000/10000ppm correspond to an analogue interface of 0 - 5/10V or 4 - 20mA.
Selectively a switching output with adjustable switching point and hysteresis is available.
The very practical snap-in mounting flange and connector for the supply voltage and outputs allow quick and
easy installation of the EE82 without ever opening the housing.
Measuring Values
Measuring principle Non-Dispersive Infrared Technology (NDIR)
Sensing element E+E Dual Source Infrared System
Measuring range 0...2000 / 5000 / 10000ppm
Accuracy at 25°C
(77°F) 0...2000ppm: < ± (50ppm +2% of measuring value)
and 1013mbar 0...5000ppm: < ± (50ppm +3% of measuring value)
0...10000ppm: < ± (100ppm +5% of measuring value)
Response time
τ
63
< 195s
Temperature dependence typ. 2ppm CO
2
/°C
Long term stability typ. 20ppm / year
Sample rate approx. 15s
Output
Analogue Output
0...2000 / 5000 / 10000ppm 0 - 5 / 0 - 10V -1mA < I
L
< 1mA
4 - 20mA R
L
< 500 Ohm
Switching Output
Max. 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
General
Supply voltage 24V AC ±20% 15 - 35V DC
Current consumption typ. 10mA + output current
max. 0.5A for 0.3s
Warm up time
1)
< 5 min
Housing / protection class PC / IP54
Electrical connection M12 plug
Electromagnetic compatibility EN61326-1 FCC Part 15
EN61326-2-3 ICES-003 ClassB
Working temperature and conditions -20...60°C
(-4...140°F) 0...100% RH
Storage temperature and conditions -20...60°C
(-4...140°F) 0...95% RH (not condensating)
1) warm up time for performance according specification
EE82
EE82 Series
green houses
fruit and vegetable storage
life stock barns
easy installation
compact housing
auto-calibration
measuring range 0...10000ppm
analogue or switching output
CO
2
Transmitters and Switches for
demanding applications
Typical Applications Features
Technical Data
v1.6
EE82