Technical Data - S+S Regeltechnik AERASGARD ACO2-W Operating Instructions, Mounting & Installation

G
AERASGARD ® ACO2 - SD ⁄ ACO2 - W ⁄ ALQ - CO2 - W ⁄ AFTM - (LQ) - CO2 - W ⁄ ATM - CO2 - SD
Maintenance-free on-wall sensor AERASGARD
plastic housing with quick-locking screws, for determining the CO2 content of the air (0...2000 ppm/0...5000 ppm) and the temperature
(–35...+80 °C). The measuring transducer converts the measured values into a standard signal of 0 -10 V.
Maintenance-free on-wall sensor AERASGARD
plastic housing with quick-locking screws, optionally with/without Display, for determining the CO2 content of the air (0...2000 ppm/0...5000 ppm),
the quality (0...100 % VOC), the temperature (–35...+80 °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 centres, 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. One sensor for every 30 m² of
space is recommended.
A long-term stable, digital humidity and temperature sensor guarantees 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. With regard to the expected air contamination, low, medium or high VOC sensitivity can be selected. 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

Voltage supply:
Power consumption:
Outputs:
Relay output:
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 (CO2)
Sensor, CO2:
Measuring range, CO2:
Output, CO2:
Measuring accuracy, CO2:
Temperature dependence, CO2:
® ACO2 - SD and ATM - CO2 - SD with active output, automatic calibration, in an impact-resistant
®
AFTM - LQ - CO - W with active/switching output, automatic calibration, in an impact-resistant
2
24 V AC ⁄ DC (± 10 %)
< 4.8 W ⁄ 24 V DC typical; < 6.8 VA ⁄ 24 V AC typical; peak current 200 mA
Ax x - SD 0 -10 V (fixed)
Ax x - W 0 -10 V or 4...20 mA, working resistance < 800 Ω
(selectable via DIP switches, selected variant applies for all outputs),
with offset potentiometer (± 10 % of the measuring range)
Ax x - SD without changeover contact
Ax x - W with potential-free changeover contact (24 V / 1 A)
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.
0...95 % r. H. (without dew formation)
typically ± 2.0 % (20...80 % r. H.) at +25 °C, otherwise ± 3.0 %
0 -10 V or 4...20 mA (selectable via DIP switches)
–35...+80 °C
–10...+60 °C
typically ± 0.4 K at 25 °C
Ax x - SD
0 -10 V (fixed)
Ax x - W 0 -10 V or 4...20 mA (selectable via DIP switches)
VOC sensor (metal oxide)
(VOC = volatile organic compounds),
with manual calibration (using zero button) and
automatic calibration (permanently active)
0...100 % air quality; referred to calibrating gas;
multi-range switching (selectable via DIP switches)
VOC sensitivities (low/medium/high) or
IAQ category (Indoor Air Quality)
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)
typically ± 20 % of final value (referred to calibrating gas)
> 60 months (under normal load conditions)
depending on the type of loading and gas concentration
optical NDIR sensor (non-dispersive infra-red technology),
with manual calibration (via zero button),
Ax x - SD with automatic calibration (fixed)
Ax x - W with automatic calibration (can be deactivated via DIP switches)
0...2000 ppm or 0...5000 ppm (selectable via DIP switches)
Ax x - SD 0 -10 V (fixed)
Ax x - W 0 -10 V or 4...20 mA (selectable via DIP switches)
typically ± 30 ppm ± 3 % of measured value
± 5 ppm ⁄ °C or ± 0.5 % of measured value ⁄ °C
(whichever is higher)
10
Rev. 2021 - V25
continued on next page!