10
G
AERASGARD
®
RCO
2
- W ⁄ RLQ - CO
2
- W ⁄ RFTM - LQ - CO
2
Rev. 2017 - V25 GB
The maintenance-free, microprocessor-controlled
AERASGARD
®
RFTM - LQ
- CO
2
and
RCO
2
- W ⁄ RLQ - CO
2
- W
is used to monitor the entire room climate.
For this purpose, measurands air humidity, temperature, CO
2
concentration as well as air quality (VOC) are measured. All measurands are converted
to standard signals (0 -10 V or 4...20 mA). As an option, the measurands can also be continuously indicated in the illuminated display. By using a single
device to monitor all four measurands, it is possible to effectively monitor and regulate the entire room climate. The RFTM-LQ-CO
2
or RCO
2
-W measures
CO
2
in the range of 0...2000 ppm or 0...5000 ppm, VOC at one of three selectable sensitivity levels LOW / MEDIUM (default) / HIGH, temperatures in the
range of 0...+50°C, as well as relative air humidity from 0...100 % r.H. Elegant enclosure made of plastic, with snap-on lid, base with 4-hole attachment, for
installation on vertically or horizontally installed in-wall flush boxes, with predetermined breaking point for on-wall cable entry. The relative humidity (% r.H.)
quotient of water vapour partial pressure divided by the saturation vapour pressure at the respective gas temperature. 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 CO
2
content of the air is measured using an optical NDIR sensor (non-dispersive infra-red technology).
TECHNICAL DATA
Voltage supply:
24 V AC ⁄ DC (± 10 %)
Power consumption:
RCO
2
- W :
< 1.5 W ⁄ 24 V DC typical; < 2.9 VA ⁄ 24 V AC typical; peak current 200 mA
RLQ-CO
2
- W ⁄ RFTM - LQ - CO
2
:
< 4.4 W ⁄ 24 V DC typical; < 6.4 VA ⁄ 24 V AC typical; peak current 200 mA
Outputs:
0 -10 V or 4...20 mA
(
selectable via DIP switches
,
selected variant applies for all outputs), working resistance < 800 Ω
HUMIDITY
Sensors:
digital humidity sensor with integrated temperature sensor,
low hysteresis, high long-term stability
Measuring range, humidity:
0...100 % r. H. (output equivalent to 0 -10 V or 4...20 mA)
Operating range, humidity:
0...95 % r. H. (without dew formation)
Deviation of humidity:
± 3
%
r. H.
(20…80 %) at +20 °C, otherwise ± 5 % r. H.
Output, humidity:
0 -10 V or 4...20 mA
(
selectable via DIP switches
)
TEMPERATURE
Measuring range, temperature:
0...+ 50 °C (output equivalent to 0 -10 V or 4...20 mA)
Operating range, temperature:
0...+ 50 °C
Temperature deviation:
± 0.2 K at +25 °C
Output, temperature:
0 -10 V or 4...20 mA
(
selectable via DIP switches
)
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
(selectable via DIP switches) VOC sensitivity low, medium, high
Output, VOC :
0 -10 V
(0 V = clean air, 10 V = polluted air)
or 4...20 mA
(
selectable via DIP switches
,
switchpoint can be adjusted from 0...100 % of the output signal)
Measuring accuracy, VOC :
± 20 % of final value (referred to calibrating gas)
Service life:
> 60 months (under normal load conditions)
CARBON DIOXIDE (CO
2
)
Sensor, CO
2
:
optical NDIR sensor (non-dispersive infra-red technology)
with automatic and manual calibration
Measuring range, CO
2
:
multi-range switching
(selectable via DIP switches)
0...2000 ppm; 0...5000 ppm
Output, CO
2
:
0 -10 V or 4...20 mA
(
selectable via DIP switches
)
Measuring accuracy, CO
2
:
± 30 ppm ± 3 % of measured value
Temperature dependence, CO
2
:
± 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
Relay output:
with potential-free changeover contact 24 V (assignment selectable via DIP switches)
Ambient temperature:
0...+ 50 °C
Warm up time:
approx. 1 hour
Response time:
< 2 minutes
Electrical connection:
0.14 - 1.5 mm
2
, via screw terminals
Enclosure:
plastic, material ABS, colour pure white (similar to RAL 9010)
Dimensions:
98 x 98 x 33 mm (Baldur 2)
Installation:
wall mounting or on in-wall flush box, Ø 55 mm, 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 60 730)
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 / or the actual CO
2
content
