
14
GAERASGARD®RFTM - LQ - CO2- Modbus
Rev. 2020 - V24
The maintenance-free, microprocessor-controlled
AERASGARD
®
RFTM - LQ- CO2- Modbus
and
RCO2⁄ RLQ - CO2⁄ RFTM - CO2- Modbus
with Modbus
connection, with ⁄without optional display, in an elegant housing, plastic, with snap-on lid, base with 4-hole attachment, is used to to monitor the entire
room climate. For this purpose, measurands air humidity, temperature, CO2 concentration as well as air quality (VOC) are measured. A setpoint potentiometer
is optionally available as an operating element. By using a single device to monitor all four measurands, it is possible to effectively monitor and regulate the
entire room climate. It measures CO2in the range of 0...5000 ppm, VOC at one of three selectable sensitivity levels LOW / MEDIUM / HIGH, temperatures
in the range of 0...+50°C, as well as relative air humidity from 0...100 % r.H.
A digital, long-term stable sensor used as measuring element for relative air humidity and temperature guarantees exact measurement results. The air
quality is determined based on a (VOC) gas mixture sensor. The CO2content of the air is measured using an optical NDIR sensor (non-dispersive infra-red
technology).
TECHNICAL DATA
Voltage supply: 24V AC ⁄ DC (± 10 %)
Power consumption: < 4.4 W ⁄ 24 V DC typical; < 6.4 VA ⁄ 24V AC typical; peak current 200 mA
Data points: temperature [°C], relative humidity [% RH]
air quality (VOC) [%], carbon dioxide (CO2) [ppm]
and setpoint potentiometer
HUMIDITY
Sensors:
digital humidity sensor with integrated temperature sensor,
low hysteresis, high long-term stability
Operating range, humidity: 0...95 % r. H. (without dew formation)
Deviation, humidity:
typically
± 2.0 %
(20...80 % r. H.) at +25 °C, otherwise ± 3.0 %
TEMPERATURE
Operating range, temperature: 0...+ 50 °C
Deviation, temperature:
typically
± 0.2 K at +25 °C
AIR QUALITY (VOC)
Sensor, VOC : VOC sensor (metal oxide)
with automatic calibration
(VOC = volatile organic compounds)
Measuring range, VOC : 0...100 % air quality; referred to calibrating gas;
multi-range switching
VOC sensitivity low, medium, high
Measuring accuracy, VOC : ± 20 % of final value (referred to calibrating gas)
Service life: > 60 months (under normal load conditions)
CARBON DIOXIDE (CO2)
Sensor, CO2: optical NDIR sensor (non-dispersive infra-red technology)
with automatic and manual calibration
Measuring range, CO2:0...5000 ppm
Measuring accuracy, CO2:
typically
± 30 ppm ± 3 % of measured value
Temperature dependence, CO2: ± 5 ppm ⁄ °C or ± 0.5 % of measured value ⁄ °C
(whichever is higher)
Pressure dependence: ± 0.13 % ⁄ mm Hg
Long-term stability: < 2 % in 15 years
Gas exchange: by diffusion
Bus protocol: Modbus (RTU-Mode), address range 0...
247
selectable
Signal filtering: 4 s / 32 s
Ambient temperature: 0...+50 °C
Warm up time: approx. 1 hour
Response time: < 2 minutes
Electrical connection: 0.2 - 1.5 mm2, via push-in terminal
Housing:
plastic, material ABS, colour pure white (similar to RAL 9010)
Dimensions: 98 x 98 x 33mm (Baldur2)
Installation: wall mounting or on in-wall flush box, Ø 55mm, base with 4 holes, for attachment to vertically
or horizontally installed in-wall flush boxes for rear cable entry, with predetermined breaking
point for cable entry from top ⁄ bottom in case of plain on-wall installation
Protection class: III (according to EN 60730)
Protection type: IP 30 (according to EN 60 529)
Standards: CE conformity, electromagnetic compatibility
according to EN 61 326, EMC Directive 2014 ⁄ 30 ⁄ EU,
Low Voltage Directive 2014 ⁄ 35 ⁄ EU
Optional:
display with illumination,
two line, cutout approx. 36 x 15 mm (W x H),
for displaying actual humidity, actual temperature, air quality and the actual CO2content (cyclic)
or a selectable parameter (static)
or an individually programmable display value
ACCESSORIES
see table