S S REGELTECHNIK RLQ-CO2-W Multifunctional Room Sensor Instruction Manual
- June 4, 2024
- S S REGELTECHNIK
Table of Contents
S S REGELTECHNIK RLQ-CO2-W Multifunctional Room Sensor
Operating Instructions, Mounting & Installation
Multifunctional room sensors and measuring transducers, for humidity, temperature, air quality (VOC) and CO2 content, calibratable, with active ⁄ switching output
Stainless steel housing
(optionally available upon request)
AERASGARD® RCO2 – W ⁄ RLQ – CO2 – W
AERASGARD® RFTM – (LQ) – CO2 – W ⁄ RTM – CO2 – SD
G AERASGARD® RCO2 – W ⁄ RLQ – CO2 – W ⁄ RFTM – LQ – CO2 – W ⁄ RTM – CO2 –
SD
Maintenance-free room sensor AERASGARD® RTM – CO2 – SD with an active
output, and automatic calibration, in an elegant plastic housing with a snap-
on lid, for determining the CO2 content of the air (0…2000 ppm) and the
temperature (0…+50°C). The measuring transducer converts the measured values
into a standard signal of 0 -10 V.
Maintenance-free room sensor AERASGARD® RFTM – LQ – CO2 – W with
active/switching output, automatic calibration, in an elegant plastic housing
with a snap-on lid, optionally with/without display, for determining the
CO2 content of the air ( 0…2000 ppm/0…5000 ppm ), the quality in three
VOC sensitivity ( 0…100 % VOC ), the temperature (0…+50°C ) as well as
the relative air humidity (0…100 % r.H). The measuring transducer converts the
measured values into a standard signal of 0 -10 V or 4…20 mA (switchable).
The sensor is used in offices, hotels, convention centers, apartments, shops,
etc. for the purpose of evaluating the indoor climate. This enables energy-
saving room ventilation on an as-needed basis, thereby reducing operating
costs and improving well-being. We recommend one sensor for every 30 m² of
space.
A long-term stable, digital humidity, and temperature sensor guarantee exact
measurement results. The CO2 measurement is performed using an optical
NDIR sensor (non-dispersive infra-red technology). The detection range is
calibrated for standard applications such as monitoring residential rooms and
conference rooms. The air quality is detected by a VOC sensor (mixed gas
sensor for volatile organic substances). This sensor determines the loading of
the room air due to contaminated gases such as cigarette smoke, body
perspiration, exhaled breathing air, solvent vapours, emissions, etc. As an
alternative, use IAQ categories (from excellent to unhealthy) following
the guidelines of the German Federal Environmental Agency to assess the room
air.
TECHNICAL DATA
AER ASGARD ® **RTM – CO2 – SD ** Room temperature and CO2 sensor, Standard
AER ASGARD ® **RCO2 – W ** Room CO2 sensor, Premium
AER ASGARD ® **RLQ – CO2 – W ** Room air quality (VOC) and CO2 sensor, Premium
AER ASGARD ® **RFTM – CO2 – W ** Multifunctional room sensor
for humidity, temperature and CO2 content, Deluxe
AER ASGARD ® **RFTM – LQ – CO2 – W ** Multifunctional room sensor
for humidity, temperature, CO2 content and air quality (VOC), Deluxe
Type ⁄ WG02| Measuring Range
Humidity Temperature
|
CO2
|
VOC
| Equipment
Display
| Item No.
(Baldur 2)
RTM – CO2 – SD| | (fixed)| | |
RT M-CO 2 – SD- U| – 0…+50 °C| 0…2000 ppm| –| –|
1501-61B2-1001-200
RCO2 – W| | (switchable)| | |
RCO 2 -W| – –| 0…2000 ⁄ 5000 ppm| –| W|
1501-61A0-7301-200
RCO 2 – W LCD| – –| 0…2000 ⁄ 5000 ppm| –| W ■|
1501-61B0-7321-200
RLQ – CO2 – W| | (switchable)| | |
RLQ-CO 2 – W| – –| 0…2000 ⁄ 5000 ppm| 0…100 %| W|
1501-61B1-7301-500
RLQ-CO 2 – W LCD| – –| 0…2000 ⁄ 5000 ppm|
0…100 %| W ■| 1501-61B1-7321-500
RFTM – CO2 – W| | (switchable)| | |
RF T M- CO 2 -W| 0…100 % r.H. 0…+50 °C| 0…2000 ⁄ 5000 ppm| –| W|
1501-61B6-7301-200
RF T M- CO 2 – W LCD| 0…100 % r.H. 0…+50 °C| 0…2000 ⁄ 5000 ppm| –|
W ■| 1501-61B6-7321-200
RFTM – LQ – CO2 – W| | (switchable)| | |
RF T M- LQ-CO 2 – W| 0…100 % r.H. 0…+50 °C| 0…2000 ⁄ 5000 ppm| 0…100 %|
W| 1501-61B8-7301-500
RF T M- LQ-CO 2 – W LCD| 0…100 % r.H. 0…+50 °C| 0…2000 ⁄ 5000 ppm|
0…100 %| W ■| 1501-61B8-7321-500
Outputs: 0 -10 V or 4…20 mA
(selectable via DIP switches, selected variant applies for all outputs) –
Standard room sensor RTM – CO2 – SD with fixed output 0 -10 V!
Equipment: W = changeover
contact – Standard room sensor RTM – CO2 – SD
without changeover contact !
Note: ** This unit must not** be used as safety-relevant device!
AERASGARD® RCO2 – W ⁄ RLQ – CO2 – W ⁄ RFTM – LQ – CO2 – W ⁄ RTM – CO2 –
SD
DIP switches (Baldur 2) RFTM – LQ – CO2 – W
VOC sensitivity| DIP 1| DIP 2
LOW| OFF| OFF
MEDIUM (default)| O N| OFF
HIGH| OFF| O N
IAQ (Indoor Air Quality)| O N| O N
CO2 content| DIP 4
0…2000 ppm (default)| OFF
0…5000 ppm| O N
CO2 automatic zero point| DIP 6
deactivated| OFF
activated (default)| O N
Relay assignment| DIP 7| DIP 8
CO2 (default): 600…1900 ppm / 900…4700 ppm| OFF| OFF
VOC: 10…95 %| O N| OFF
Temperature: +5…+48 °C| OFF| O N
Humidity: 10…95% r.H.| O N| O N
Output| DIP 9
Voltage 0 -10 V (default)| OFF
Current 4…20 mA| O N
Note: DIP 3 and DIP 5 are not assigned!
Level| IAQ (Indoor Air Quality)| VOC
---|---|---
1| excellent
no action required
| 0 … 19 %
2| good
prompt airing recommended
| 20 … 39 %
3| moderate| 40 … 59 %
| airing recommended|
4| poor
increased airing required
| 60 … 79 %
5| unhealthy
intense airing necessary
| 80 … 100 %
AERASGARD® RCO2 – W ⁄ RLQ – CO2 – W ⁄ RFTM – LQ – CO2 – W ⁄ RTM – CO2 – SD
Installation and Commissioning
ATTENTION!
The minimum CO2 concentration of outdoor air amounts to approx. 350 ppm
(output voltage = 1.75 V at MR = 0…2000 ppm or 0.7 V at MR = 0…5000 ppm) in
leafy, hardly industrialised areas. Gas inter-exchange in the sensor element
happens by diffusion. Depending on the changes to the concentration and the
flow velocity of the air surrounding the sensor, the reaction of the device to
the change of concentration may take place with a delay. It is essential to
choose an installation location for the device in which the air stream flows
around the sensor. Otherwise the gas exchange may be considerably delayed or
prevented.
Automatic calibration of the carbon dioxide measurement (default)
The automatic background logic is a self-calibrating mechanism that is
suitable for use in applications in which the CO2 concentration drops to fresh
air level (350 – 400 ppm) at least three times in 7 days. This should
typically occur during times in which rooms are unoccupied. The sensor reaches
its normal accuracy after 24 hours of continuous operation in an environment
that has been subjected to a fresh air supply of 400 ppm CO2. The deviation
errors remain minimal if the sensor is exposed to fresh air at least 4 times
within 21 days. The device needs a permanent operating mode without
interruptions to the power supply to be able to work correctly.
Manual calibration of carbon dioxide measurement
Manual calibration can be carried out independently of the DIP switch
position. Sufficient fresh air (CO2 content = 500 ppm) must be provided before
and after the calibration procedure! The calibration procedure is started by
pressing the “ZERO CO2” (for approx. five seconds). This is signalled by the
flashing LED or the countdown timer on the display (AUTO 0). Then calibration
takes place. During this phase, the LED is constantly active and a 600-second
countdown runs on the display CAL 0). The LED is deactivated after successful
calibration.
Automatic air quality calibration (permanently active)
We recommend to rinse the sensor every 7 days for 20 minutes or longer with
fresh air as a basis for automatic calibration. Within a period of approx. 3
weeks, the minimum output value for air quality is saved. During this period,
the output signal is standardised to the zero point. The maximum correction
per interval is limited here. Long-term drifts and the operation-related
ageing of the sensor e lement are thus completely eliminated. Every time the
device is switched on, the automatic calibration cycle restarts and calculates
a correction value across the operating period. In case of power disruptions
of less than 7 days, the calculation algorithm may be supported with a manual
calibration to adjust the correction value more quickly.
Manual calibration of air quality
Sufficient fresh air must be provided before and after the calibration
procedure! We recommend a fresh air supply of at least two hours before
starting manual calibration. The calibration procedure is started by pressing
the “ZERO VOC” button (for approx. five seconds). This is signalled by the
flashing LED or the countdown timer on the display (AUTO 0). Then calibration
takes place. During this phase, the LED is constantly active and a 60-second
countdown runs on the display CAL 0). The LED is deactivated after successful
calibration.
General information on air quality
The service life of the sensor depends on its functional principle and the
type and concentration of pollutant gas burden. The sensitive layer of the
sensor element reacts with all volatile organic compounds and is therefore
modified in its electrical properties. This procedure leads to an offset of
the characteristic line. When measuring the air quality, the general condition
of the air quality is recorded. Whether the air quality is “good” or “bad”
depends on the individual interpretation of each individual. Different
pollution burdens and concentrations influence the air quality signal (0 – 10
V) in different ways. Examples are cigarette smoke, deodorant sprays, cleaning
agents and various adhesive materials for floor and wall coverings, as well as
dyes. Increased levels of solvents, nicotine, hydrocarbons, aerosol
propellants, etc. intensify the wear/ageing of the sensor element. Especially
at high pollutant gas burdens, even when the devices are idle (transport and
storage) the zero point is adjusted. This must be corrected on-site depending
on the specific conditions or basic burdens. Air quality measuring instruments
from various manufacturers cannot be compared directly with each other because
of the different functional principles, the pre-set basic burden (zero point)
and the permitted burden (amplification/sensitivity). The devices are set or
calibrated according to the specifications of the sensor manufacturer. Here, a
zero point and end value, and therefore a maximum load, are established. In
special circumstances, there is an overrun of the measuring range or an
excessively high basic burden on the devices (out-gassing carpets, wall paint,
etc.) In order to enable a measurement or distinction of different air
qualities, the devices must be configured by the client in accordance with the
on-site conditions which do not correspond to the function domain and thus the
factory calibration. Here, it should be noted that the factory calibration
will be lost and technical data compliance can no longer be guaranteed.
Putting in operation
After switching on the device, a self-test and tempering period follows. This
procedure takes 30 – 50 minutes,depending on the ambient conditions. During
this time the output analogue voltage differs from the actual measured value.
Manual calibration can then be performed as an option. Make sure that no
harmful substances influence the calibration process and that the sensor is
operated in fresh air. Switching point setting A potential-free changeover
contact is available as a switch output. A switching point between 10 % and 95
% of the measuring range can be selected using the SET potentiometer. The 10 %
value is added to the fresh air limit of 400 ppm for CO2. (600…1900 ppm with
MR = 0…2000 ppm or 900…4700 ppm with MR = 0…5000 ppm). With other measurands,
the corresponding lower limit is used directly as a basis. (VOC: 10…95 %,
Temperature: +5…+48 °C, Humidity: 10…95% r.H.) The assignment of the switch
output to measurand is done via DIP switch (DIP 7 and DIP 8).
Offset
Each measuring channel has a separate offset potentiometer for subsequent
adjustment of the measurement. The adjusting range is ± 10 % of the measuring
range.
Display
In the first line, the measurements with the corresponding units ( CO2 in ppm,
VOC in %, temperature in °C, relative humidity in % r.H.) are displayed in a
cyclical series. In the second line, the switching status of the relay is
shown on the left as a circuit (full ● = relay energised; empty ○ = relay de-
energised) followed by the corresponding indicator (C for CO2; V for VOC; T
for temperature; H for relative humidity in % r.H.) and the switchpoint value
is shown on the right.
SUPPLY VOLTAGE :
For operating voltage reverse polarity protection, a one-way rectifier or
reverse polarity protection diode is integrated in this device variant. This
internal one-way rectifier on AC supply voltage. The output signal is to be
tapped by a measuring instrument. The output signal is measured her against
zero potential (O V) of the input voltage! When this device is operated on DC
supply voltage, the operating voltage input UB+ is to be used for 15…36 V DC
supply and UB – or GND for ground wire!
When several devices are supplied by one 24 V AC voltage supply, it is to be
ensured that all ”positive“ operating voltage input terminals (+) of the field
devices are connected with each other and all ”negative“ operating voltage
input terminals (–) (= reference potential) are connected together (in-phase
connection of field devices). All outputs of field devices must be referenced
to the same potential! In case of reversed polarity at one field device, a
supply voltage short- circuit would be caused by that device. The
consequential short-circuit current flowing through this field device may
cause damage to it. Therefore, pay attention to correct wiring.
Humidity table
MR: 0…100 % r. H.
Temperature table
MR: 0…+50 °C
General notes
- This device may only be used in pollutant-free non-precipitating air without above-atmospheric or below-atmospheric pressure at the sensor element.
- On outdoor and duct sensors, the sinter filter of the senor element protects the humidity sensor against potential dust exposure.
- In case of pollution ⁄ contamination, this filter should be cleaned on a regular basis.
- Dust and pollution falsify measurement results and are to be avoided. Slight pollution and dust sediments can be removed by using compressed air.
- Touching the humidity element is under any circumstances to be avoided, as that would result in considerable mismeasurements.
- In case of pollution, we recommend cleaning and recalibration in the factory.
- In any case, the sensor must not get in contact with chemicals or other cleaning agents.
- Extremely high concentrations of VOCs, aggressive cleaning agents or silicone-containing vapours can destroy the sensor element or reduce its service life drastically.
- The air quality signal “good“…“bad“ is represented by the output signal 0 -10 V or 4…20 mA.
- The device operating range covers 10 … 95 % relative humidity respectively 0 …+50 °C.
- Beyond that range, mismeasurements or increased deviations will occur.
- The chemical sensor is a consumable. The lifetime of the sensor depends on nature and concentration of the pollutant gas burden.
- When several sensors are connected to one voltage supply of 24 V AC, correct polarity must be regarded as otherwise the alternating voltage source may be short-circuited.
- The outputs are short-circuit proof. Applying overvoltage or voltage supply to the output will destroy the device.
- If the automatic system (automatic balancing of CO2 / VOC measurand) is activated, a cyclical fresh air supply must be provided, as otherwise incorrect measurements can occur.
- If this device is operated beyond the specified range, all warranty claims are forfeited.
Our “General Terms and Conditions for Business“ together with the “General Conditions for the Supply of Products and Services of the Electrical and Electronics Industry“ (ZVEI conditions) including supplementary clause “Extended Retention of Title“ apply as the exclusive terms and conditions.
In addition, the following points are to be observed:
- These instructions must be read before installation and putting in operation and all notes provided therein are to be regarded!
- Devices must only be connected to safety extra-low voltage and under dead-voltage condition. To avoid damages and errors at the device (e.g. by voltage induction) shielded cables are to be used, laying parallel with current-carrying lines is to be avoided, and EMC directives are to be observed.
- This device shall only be used for its intended purpose. Respective safety regulations issued by the VDE, the states, their control authorities, the TÜV and the local energy supply company must be observed. The purchaser has to adhere to the building and safety regulations and has to prevent perils of any kind.
- No warranties or liabilities will be assumed for defects and damages arising from improper use of this device.
- Consequential damages caused by a fault in this device are excluded from warranty or liability.
- These devices must be installed and commissioned by authorised specialists.
- The technical data and connecting conditions of the mounting and operating instructions delivered together with the device are exclusively valid. Deviations from the catalogue representation are not explicitly mentioned and are possible in terms of technical progress and continuous improvement of our products.
- In case of any modifications made by the user, all warranty claims are forfeited.
- This device must not be installed close to heat sources (e.g. radiators) or be exposed to their heat flow.
- Direct sun irradiation or heat i rradiation by similar sources (powerful lamps, halogen spotlights) must absolutely be avoided.
- Operating this device close to other devices that do not comply with EMC directives may influence functionality.
- This device must not be used for monitoring applications, which serve the purpose of protecting persons against hazards or injury, or as an EMERGENCY STOP switch for systems or machinery, or for any other similar safety-relevant purposes.
- Dimensions of housings or housing accessories may show slight tolerances on the specifications provided in these instructions.
- Modifications of these records are not permitted.
- In case of a complaint, only complete devices returned in original packing will be accepted.
Notes on commissioning:
This device was calibrated, adjusted and tested under standardised conditions.
When operating under deviating conditions, we recommend performing an initial
manual adjustment on-site during commissioning and subsequently at regular
intervals. Commissioning is mandatory and may only be performed by qualified
personnel! These instructions must be read before installation and
commissioning and all notes provided therein are to be regarded!
AERASGARD® RCO2 – W ⁄ RLQ – CO2 – W
AERASGARD® RFTM – (LQ) – CO2 – W ⁄ RTM – CO2 – SD
To open the housing, set a screwdriver (2.0) in the groove at centre, press down, and lift up the bottom frame slightly. Pull top cover forward and hold it.
© Copyright by S+S Regeltechnik GmbH
Subject to errors and technical changes. All statements and data herein
represent our best knowledge at date of publication. They are only meant to
inform about our products and their application potential, but do not imply
any warranty as to certain product characteristics. Since the devices are used
under a wide range of different conditions and loads beyond our control, their
particular suitability must be verified by each customer and/or end user
themselves. Existing property rights must be observed. We warrant the
faultless quality of our products as stated in our General Terms and
Conditions.