Technical Data - S+S Regeltechnik AERASGARD ACO2-W Notice D'instruction

G
®
AERASGARD ACO
The maintenance-free, microprocessor-controlled AERASGARD
is used to monitor all measurands of relevance to the climate inside a room. These are the measurands air humidity, temperature, CO
as well as air quality (VOC). 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 AFTM-LQ-CO
one of three selectable sensitivity levels LOW / MEDIUM (default) / HIGH, temperatures in the range of –35...+80 °C, as well as relative air humidity
from 0...100 % r.H. 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 CO content of the air is measured using an optical NDIR sensor (non-dispersive infra-red technology). The detection range of the sensors
2
is calibrated for standard applications such as monitoring residential rooms and conference rooms. Room ventilation on an as-needed basis, improved
well-being and customer benefit, increased comfort as well as reduced operating costs through energy conservation are just some of the benefits of
®
employing the AERASGARD CO
but from our perspective, above all, for a combination of both measurands. The crucial factor in this respect is that both of these measurands are not
convertible into each other and derivations to or from one another cannot be made. An NDIR CO
detect any VOC; a VOC mixed gas sensor cannot recognize CO

TECHNICAL DATA

Voltage supply:
Power consumption:
Outputs:
HUMIDIT Y
Sensors:
Sensor protection:
Measuring range, humidity:
Operating range, humidity:
Deviation of humidity:
Output, humidity:
TEMPERATURE
Measuring range, temperature:
Operating range, temperature:
Temperature deviation:
Output, temperature:
AIR QUALIT Y (VOC)
Sensor, VOC:
Measuring range, VOC:
Output, VOC:
Measuring accuracy, VOC:
Service life:
CARBON DIOXIDE (CO )
2
Sensor, CO :
2
Measuring range, CO :
2
Output, CO :
2
Measuring accuracy, CO :
2
Temperature dependence, CO :
2
Pressure dependence:
Long-term stability:
Gas exchange:
- W ⁄ ALQ - CO - W ⁄ AFTM - CO
2 2
or ACO
2 2
sensor. The explanations above demonstrate that there are applications for CO
2
2
24 V AC ⁄ DC (± 10 %)
< 4.8 W ⁄ 24 V DC typical; < 6.8 VA ⁄ 24 V AC typical; peak current 200 mA
0 -10 V or 4...20 mA (selectable via DIP switches,
selected variant applies for all outputs), working resistance < 800 Ω
digital humidity sensor with integrated temperature sensor,
low hysteresis, high long-term stability
plastic sinter filter, Ø 16 mm, L = 35 mm, exchangeable
(optional metal sinter filter, Ø 16 mm, L = 32 mm)
0...100 % r. H. (output equivalent to 0 -10 V or 4...20 mA)
0...95 % r. H. (without dew formation)
± 3 % r. H. (20...80 %) at +20 °C, otherwise ± 5 % r. H.
0 -10 V or 4...20 mA (selectable via DIP switches)
–35...+80 °C (output equivalent to 0 -10 V or 4...20 mA)
–10...+60 °C
± 0.2 K at 25 °C
0 -10 V or 4...20 mA (selectable via DIP switches)
VOC sensor (metal oxide) with automatic calibration
(VOC = volatile organic compounds)
0...100 % air quality; referred to calibrating gas;
multi-range switching (selectable via DIP switches)
VOC sensitivity low, medium, high
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)
± 20 % of final value (referred to calibrating gas)
> 60 months (under normal load conditions)
optical NDIR sensor (non-dispersive infra-red technology)
with automatic and manual calibration
multi-range switching (selectable via DIP switches)
0...2000 ppm; 0...5000 ppm
0 -10 V or 4...20 mA (selectable via DIP switches)
± 30 ppm ± 3 % of measured value
± 5 ppm ⁄ °C or ± 0.5 % of measured value ⁄ °C (whichever is higher)
± 0.13 % ⁄ mm Hg
< 2 % in 15 years
by diffusion
⁄ AFTM - LQ - CO
2
® AFTM - LQ - CO or ACO - W ⁄ ALQ - CO
2 2
- W ⁄ ALQ - CO - W measures CO
2
molecules.
10
2
- W is designed for on-wall installation and
2
in the range of 0...2000 ppm or 0...5000 ppm, VOC at
2
measurements, for VOC measure ments,
2
measuring instrument measures selectively and cannot
2
Rev. 2017 - V20 GB
concentration
2
(continued on next page!)