Oppermann Regelgeräte CO2TRH User manual

CO2-, temperature and humidity transducer CO2TRH
for indoor installation
Sensors PG1 | Data sheet No. 14110 | Version 04-2017 | 1| 14
• 3-way sensor. Multi-functional detection
and control of CO2, temperature, and
humidity.
• Analog outputs 0 – 10 V for all 3 variables.
With additional relay output for CO2.
• 2.4" TFT LCD color touch display with
alarm function
• Standard Modbus and BACnet interface.
• For demand-based ventilation as a
function of CO2concentration
(recommended threshold value < 1,000 ppm).
• Automated on-board self-calibration and
on-board diagnostics with service intervals of
longer than 5 years.
• Latest generation infrared technology
(NDIR) for measuring carbon dioxide gas.
Technical Data
Valid from rmware V 1.11
CO2-Sensor: Non-dispersive infrared technology
(NDIR) with automated baseline
correction (vers. K 70)
Sensor ranges: CO20 – 2.000 ppm
Temperature 0 – 50 °C
Relative humidity 0 – 100 %
Fault thresholds:
– Temperature: ±1,0 °C
– CO2:± 30 ppm ± 3% of the sensor reading
– RH: ±5 % RH (at 20 – 80 % RH)
Sampling cycle: every 15 seconds
CO2 pressure sensitivity: +1.6% of the sensor reading per kPa
deviation from standard pressure
(100 kPa)
Service interval: 5 years (recommended
for the rst inspection)
Service life: > 15 years
Rated ambient
conditions: Humidity: 0 – 95% RH
(non-condensing)
Storage temperature: -30 – 70 °C
Operating temperature: 0 – 50 °C
Protection type: IP 20
Dimensions (L x W x D): approx. 83 x 123 x 23 mm
Weight: approx. 130 g
Power supply: 24 V DC or 24 V AC
(50 – 60 Hz) ±20 %
Power consumption: < 0.6 W with display. max. 2 W peak
Heat-up time: 1 Min
(full specication after 15 minutes)
Response time T 1/e: < 3 minutes
Run-in period: > 3 weeks after startup
Screw terminals: max. 1,5 mm²
Outputs
RS485 Bus: Modbus or BACnet, selectable
Relay output: closer (rated load 1 mA/5 V up to
1A/50 V AC / 24 V DC). Closes at
1,000 ppm CO2, hysteresis 100 ppm
(adjustable). Menu-controlled
switching between temperature or
humidity.
Analog outputs: 3 linear analog outputs
0 – 10 V DC
(Rout < 100 Ω, RLoad > 5 k Ω).
OUT1: 0 – 10 V DC
scaled to 0 – 2,000 ppm CO2
OUT2: 0 – 10 V DC
scaled to 0 – 50 °C
OUT3: 0 – 10 V DC
scaled to 0 – 100 % RH

CO2-, temperature and humidity transducer CO2TRH
2| 14 | Sensors PG1 | Data sheet No. 14110 | Version 04-2017
Sizes in mm
Function/applications
The carbon dioxide concentration (CO2) is generally accepted
as a good indicator of the foot trac load on a room. Sucient
ventilation can also be a countermeasure against the spread of
viruses and bacteria – the cause for illnesses, sick absence, and
the resulting loss in productivity. Studies show that CO2-based
ventilation management cuts heating costs.
The CO2TRH is designed to measure temperature, relative
humidity and carbon dioxide concentration of indoor air (e.g.
conference rooms, hotels, hospitals, schools), and to control the
ventilation system based on demand. The sensor consists of a
membrane connected to a measurement chamber. The installed
diusion-based carbon dioxide sensor facilitates a stable and
reliable, high-precision signal.
The installed relay closes at values of > 1,000 ppm CO2and
opens at values of < 900 ppm. This also supports direct signa-
ling of excessive concentrations or supplemental ventilation.
Self-calibration is performed automatically every time the
power supply is connected and at regular intervals thereafter. In
order to ensure optimum self-calibration, the ventilation should
bring the CO2concentration to normal for a few minutes at least
every week.
Note:
Connect analog outputs before taking readings. After instal-
lation, the sensor should remain connected to power to allow
the CO2sensor cell to run in.
See separate documents on our homepage for Modbus or
BACnet congurations. (download or link in the short catalog)
* max 24 V AC/DC ±20 %
** CO2factory setting. Switchable between temperature or humidity
Dimensions wall housing
Electrical connection
60
60
68
83,5
Relay output** Analog outputs Bus connection Supply*

Sensors PG1 | Data sheet No. 14110 | Version 04-2017 | 3| 14
CO2-, temperature and humidity transducer CO2TRH
Installation
Please observe these instructions.
All work (such as installation, electrical connection, startup,
operation, and maintenance) must only be performed by suf-
ciently qualied tradesmen. The respectively applicable local
rules and regulations (e.g. national building codes, electrical/
VDE regulations, etc.) must be observed. Installers and opera-
ting entities are required to suciently familiarize themselves
before startup. Read the product description before operating
the equipment. Verify that the product can be used for the
relevant application without restrictions. We are not liable for
printing errors and changes after printing.
Appropriate use implies compliance with operating and
installation instructions. We are not liable for losses due to inap-
propriate use. Unauthorized or inappropriate manipulations or
modications of the device render the operating permit, the
product warranty and warranty claims null and void.
Attention: the correct positioning and proper technical connec-
tion of cables is a basic condition for proper technical function.
The airow requires particular attention.
Note the following instructions:
• The sensor must be mounted vertically on an interior wall.
• Ensure unrestricted air circulation on inlets and outlets.
• Attention: additional openings on the housing or other
modications of the air ventilation and heat distribution
may not be made in the device.
Cable bushings in particular must be sealed properly since
the resulting air circulation can create temperature variations
in the housing that greatly dier from the room temperature
and may result in incorrect readings.
• Only install the sensor where it is not exposed to strong light,
heat, sun irradiation, or airows.
• Wait until conditions have stabilized. Depending on the wall
material, this can require several hours or days.
1) 2)
5)
3) 4) 6)
Sizes
in mm
*Option*Option

CO2-, temperature and humidity transducer CO2TRH
4| 14 | Sensors PG1 | Data sheet No. 14110 | Version 04-2017
Opening the housing
Figure 1 Plint
Outputs (factory settings)
Terminal Default
Output
Default Output Range
OUT (1) 0 - 10 VDC 0 - 2000 ppm CO 2
OUT (2) 0 - 10 VDC 0 – 50 oC
OUT(3) 0 - 10 VDC 0 - 100% RH
Outputs can be individually configured via the menu (only by appropriately trained and instructed technicians).
We recommend keeping the factory settings.

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CO2-, temperature and humidity transducer CO2TRH
Display menu – operation
The following instructions only address the most important functions for illustration purposes.
Modifications may be made without notice, in particular in connection with software updates.
This documentation refers to software V 1.06.
(The display starts shortly after connecting the power supply = Start).
The graphic display menu of the touch display is self-explanatory.
There are 3 menu levels.
At the screen level,the display can be switched on demand between collective display, individual display,
and graphic tracking display, and can also be used to enter the alarm thresholds. The enhanced display
options are programmed at the screen level, and the transmitter parameters are programmed in the
settings level.
Only the PIN2 = 4 x Zero = 0000 is stored in the default condition. This PIN controls access to the
Settings parameter programming level.
If required, a PIN1 can be additionally assigned for access to the
Screen display level.
It is possible to assign a dierent PIN1/PIN2 for access .
Attention:these changed PINs must be stored in a safe place to ensure authorized access.
Parameters cannot be programed if PINs are not known or not entered. The device then needs
to be sent to the factory .
Adjusting the desired display mode – display level
CO2/(Temperature)/(relative humidity)
Start
1.06

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Adjusting the threshold values of alarm display (yellow and red)
CO2 for yellow limit, for illustration .
The procedure is the same for temperature and relative humidity and RED limit.
+/-100 ppm
SET
CO
2
red limit 1000ppm
RH yellow limit 70%RH CO2 red limit
1000ppm
RH yellow limit
70%RH
C hange 24h/week
Back to the next higher
level menu by tapping "<<"

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CO2-, temperature and humidity transducer CO2TRH
Expanded screen setting (Screen)
Attention optional**
** only when PIN1 is active; one pin is queried in this case. Factory setting = no PIN
Brightness
To save energy and to extend the service life of the display, we recommend not adjusting the
brightness higher than 90%.
10, 20,…100%
Invert background
Sleep mode
3,4,5…10 s
'

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8| 14 | Sensors PG1 | Data sheet No. 14110 | Version 04-2017
Blink/alternating mode
3 s
3 s
Temperature UoM °C or °F

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CO2-, temperature and humidity transducer CO2TRH
Expanded menu area – parameter programming (settings)
(only for trained technicians)
Achtung:Safety Instructions
Changes in this area can have a big impact on the functionality and must only be performed by
appropriately qualified technicians with appropriate technical knowledge. Access to this area is
only possible by actively entering a PIN.We are not liable for incorrect settings and inappropriate
operation. Changes in this area must be made with full knowledge of the resulting responses
from the CO2TRH transmitter and connected peripherals and the resulting functionality of any other
connected systems, specifically such as ventilation, heating, DDC, central building control systems,
etc. We are not liable for losses due to lack of or inadequate knowledge. The necessary PIN
(default setting 4 x 0) must only be entered and this area must only be accessed specifically when
the aforementioned conditions have been met. We will not honor product warranties or assume liability
in the event of forgotten or lost PINs.
All modifiable fields have a green perimeter. Fields that cannot be changed / parametrized
have a gray perimeter. By jumping back via the << field, the changed values are immediately
saved.
In this case, we urgently recommend to refrain from making any changes other than assigning
the bus address and the buss parameters and to keep the factory settings. When required, the
switching hysteresis of the relay can also be changed.
Access to the parameter programming level (settings)
PIN2 request :
default 0000
Selection of
submenus in the para-
meter programming level
PIN1 factory setting: OFF = not active
(controls access to the display menu)
PIN2 factory setting: 0000
(controls access to the settings menu – parameter programming)
Changing the PINS under "METER". Comply with the following instructions !

CO2-, temperature and humidity transducer CO2TRH
10 | 14 | Sensors PG1 | Data sheet No. 14110 | Version 04-2017
Adjusting BUS parameters
(comply with the supplemental documentation for Modbus and BACnet)
Note: changes only become active after these are acknowledged with "RESET".
RS-485
NOTE!
Entry request for product and software version / PIN assignment / RESET
Setting the bus protocol (automatic detection, Modbus or BACnet)
Supplemental instructions:
•RESET causes the incorporation of changes to the bus parameters (“warm start”).
•PIN 1 can be used to program access to the display settings. In this case,
no PIN is active/needed in the default condition.
•PIN 2 can be used to program access to the parameter programming levels with a new PIN
(factory setting 0000).
ATTENTION: if the PIN is changed, store it in a safe place since access is otherwise no
longer possible !
RS-485
Meter status 0x0
Version 1.06
Serial Number 0x30DA676
Type ID 402
Map Version 69
Meter information

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CO2-, temperature and humidity transducer CO2TRH
Offset / wall calibration for temperature and humidity
An offset can be applied to the sensor value if the sensor location is not ideal and
deviations from the target/reference value are identified.
0.0..-0.1…-0.2°C
Parameter programming/scaling of outputs
Determining the output voltage range
Outputs
Example: Output 2
Out2 Max 10.0V,
9.9V..5.0V..
Confirmation

CO2-, temperature and humidity transducer CO2TRH
12 | 14 | Sensors PG1 | Data sheet No. 14110 | Version 04-2017
Parameter programming/scaling of outputs
Determining the lower / upper sensor range for the voltage output
Example for the lower threshold value "LOW". Upper threshold value "High" is adjusted accordingly.
Low 600ppm 600, 550…400ppm
Low 400ppm
Parameter programming - relay output
Relay
Type Digital
Changing the assignment of the variable to the output signal
Source
Confirmation

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CO2-, temperature and humidity transducer CO2TRH
Inverting outputs
Analogue
Analogue invert
CO2 calibration
This is intentionally not described even if the menu provides the option.
We ask that you not make changes / take actions in this area.
We also recommend that you refrain from changing the ABC logic (factory setting). More than
10 years ofexperience has shown that changes are generally not necessary here.
The only sensible exception could be changing the " Sea Level/Altitude " setting.
Factory setting: 0 m = sea level.
A compensation entry may be required above 1,000 above sea level (installation location).
An estimate to 500 m accuracy is generally sufficient.
Please send the units to the factory for the CO2 calibration. We only recommend a calibration at the
factory since suitable calibration capabilities are generally not available on-site.
Under the aforementioned conditions (clean, uncontaminated air), the service life of the sensor cells
is greater than 10 years. Under the aforementioned environmental conditions and when used as
intended, a recalibration is generally needed no earlier than after 5 years.
Menu structure for CO2 calibration (not recommended). Should always be performed at the factory.
Blink/alternating mode
3 s
3 s
Temperature UoM °C or °F
Inverting outputs
Analogue
Analogue invert
CO2 calibration
This is intentionally not described even if the menu provides the option.
We ask that you not make changes / take actions in this area.
We also recommend that you refrain from changing the ABC logic (factory setting). More than
10 years ofexperience has shown that changes are generally not necessary here.
The only sensible exception could be changing the " Sea Level/Altitude " setting.
Factory setting: 0 m = sea level.
A compensation entry may be required above 1,000 above sea level (installation location).
An estimate to 500 m accuracy is generally sufficient.
Please send the units to the factory for the CO2 calibration. We only recommend a calibration at the
factory since suitable calibration capabilities are generally not available on-site.
Under the aforementioned conditions (clean, uncontaminated air), the service life of the sensor cells
is greater than 10 years. Under the aforementioned environmental conditions and when used as
intended, a recalibration is generally needed no earlier than after 5 years.
Menu structure for CO2 calibration (not recommended). Should always be performed at the factory.

14 | 14 | Sensors PG1 | Data sheet No. 14110 | Version 04-2017 Specications subject to change.
CO2-, temperature and humidity transducer CO2TRH
Oppermann Regelgeräte GmbH | Im Spitzhau 1 | 70771 Leinfelden-Echterdingen, Germany
Phone [phone] | Fax [phone] | [e-mail] |www.oprg.de
Error codes and trouble-shooting
(in English – only for trained technicians)
Error codes are displayed as a hexadecimal value in the parameter programming area under
"Meter" "Meter Info" Meter status and output via the bus.
Bit #
Error code
Error description
Suggested action
0
CO
2
sensor
Com. error
No ability to communicate
with CO2 sensor module.
Try to restart sensor by power
OFF/ON.
Contact local distributor.
1
CO
2
sensor
CO2measure error
CO
2
measurement error, see
Error Status at address 0x1E
for detailed information.
Try Background calibration (see fig. 4
and 5).
Contact local distributor.
See Note 1!
2
T sensor
T measure error
Temp measurement error.
Try to restart sensor by power
OFF/ON.
Contact local distributor.
3
RH/T sensor
com error
No ability to communicate
with RH/T sensor module.
4
RH/T sensor
RH measure error
RH measurement error.
5
RH/T sensor
T measure error
Temp measurement error,
sensor will use CO2sensor
temperature if RH/T
Temperature is unavailable.
S_Temp will be set to
NTC_Temp.
6
7
8
Output config. error
Error in output configuration.
Output is still updated,
i.e. can be 0-10V
Check connections and loads of
outputs.
Check detailed settings and
configuration.
Contact local distributor.
Table 2: Error codes and action plans.
Note 1. Occurs if probe is out of range, at very high CO2values. Error code resets automatically when
measured values returns to normal. May also indicate need of zero point calibration. If CO2values are
normal and error code remains, the sensor can be defect or the connections to it are broken.
Remark:If several errors are detected at the same time, different error code numbers will be added
together into one single error code!
PLEASE NOTE! Sensor accuracy is defined at continuous operation (at least three (3) weeks after
installation).