SenseAir eSENSE User manual

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IMA 111
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CO2transmitter
eSENSE eSENSE - Disp
General
The IAQ-sensor product eSENSE (sensor for wall mounting) is designed to measure
carbon dioxide (CO2) in rooms. Option - TR is prepared for temperature
measurements by the resistive temperature probe mounted by the user. The
temperature probe is potential free (floating). Option - Disp displays the measured
CO2value in ppm (parts-per-million) on the LCD.
The units are designed for connecting to Direct Digital Control (DDC) with 0-10V or
2-10V signal inputs. The two parallel signal outputs OUT1 (0-10V) and OUT2 (2-10V
or 4-20 mA) give linear signal voltages or currents corresponding to the measuring
range.
The output OUT2 also indicates the status by setting the output voltage to 1V or the
output current to 2 mA when the sensor self-diagnostics detects any error.
To open the wall mounted housing
Figure 1. Closed housing seen from above.
The housing is opened by pressing a screw
driver on the locking hook. The locking
hook is then released.
eSENSE (Disp)
Press here to open.

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Electrical connections
The power supply has to be connected to and . is considered as system
ground. The same ground reference has to be used for the eSENSE unit and for the
DDC/signal receiver.
PLEASE NOTE!
The same ground reference has to be used for the eSENSE
unit and for the control system!
Terminal
Function
Electrical data
Remarks
Standard settings
Remarks
Settings of
this sensor
Power (+)
Power
ground (-)
24 VAC/DC+
(+-20%), 2W
24 VAC/DC-
System voltage
reference
Out(1)
Out(2)
Analogue
output 1 (+)
Analogue
output 2 (+)
0-10 VDC
2,0-10,0 VDC or
4,0-20,0 mA
0,9-1,6 VDC or
1.5-2,5 mA
0 VDC or 0mA
0-2000 ppm CO2
0-2000 ppm CO2
Status = ERROR
Status = NOT READY
Table I. Connections of the main terminal of eSENSE
Figure 2. PCB with jumper to configure OUT2 for current output 4-20mA or voltage output 2-10VDC
~
+
~
+
Option display
+
~

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Figure 3. Enlarged picture of the PCB with the jumper set to current output (left position)
Figure 4. Enlarged picture of the PCB with the jumper set to voltage output (right position)
Self-diagnostics
The system contains a complete self-diagnostic procedure that is executed
automatically when the sensor is in operation. The yellow LED is lit if an error is
found. Sensors with display show a wrench if an error is found. The wrench is shown
and the yellow LED is lit during the first seconds after power up and if the measuring
range exceeded. They are automatically turned off when the sensor returns to normal
operation. The output OUT2 indicates the same information by setting the output
voltage to 1V or 2 mA.
Maintenance
The eSENSE is basically maintenance free in normal environments thanks to the
built-in self-correcting ABC algorithm. Discuss your application with SenseAir in order
to get advice for a proper calibration strategy.
PLEASE NOTE!
The sensor accuracy is defined at continuous operation (at least 3 weeks after
installation)
PLEASE NOTE! Electronic products should be disposed of via a suitable
recycling centre.
+
~
+
~

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Dimensions
Figure 5. The dimensions of the sensor in mm and (inches)
Mounting of the sensor onto the wall
Please use screws with screw head diameter less than 7,5 mm (0,295 inches) and
screw head height less than 2,4 mm (0,094 inches).
This product is in accordance with the EMC 2004/108/EC, 92/31/EEG including
amendments by the CE-marking Directive 93/68/EEC
The product fulfils the following demands: EN 61000-4-2 level 2,
EN 61000-4-3 level 2, EN 61000-4-4 level 4, EN 61000-4-6, EN 61000-4-8 level 4,
EN 55022 class B
SenseAir® AB (headquarter)
Stationsgatan 12
Box 96
820 60 Delsbo
SWEDEN
Phone: [phone]
E-mail: [e-mail]
Web site: www.senseair.com
80(3,15)
28(1,10)
30(1,18)
60(2,36)
4(0,16) 4(0,16)
30(1,18)
100(3,94)