S+S Regeltechnik AERASGARD ALQ - CO2 Mode D'emploi page 6

G
®
AERASGARD ALQ - CO
The self-calibrating microprocessor-controlled AERASGARD
detect the air quality regarding VOC and the CO
gas sensor is optionally available with or without display. Optionally, the CO
ing transducer can be supplied with switching output. The CO
termined by a NDIR sensor (non-dispersive infrared technology). The detection
ranges of these sensors are calibrated for standard applications such as monitoring
of residential rooms or conference rooms. Room ventilation on an as-needed basis,
improvement of well-being and customer benefit, increased comfort as well as a
reduction of operating costs by energy conservation are only some of the beneficial
results of employing AERASGARD
alternative to choose between three sensibility ranges for VOC monitoring by means
of jumpers, comparable to three measuring ranges: LOW for low, MEDIUM (default,
equivalent to the hitherto existing type of this device) for medium, and HIGH for
high VOC sensibility. Also three measuring ranges were introduced for CO
measurement. The selection between the measuring ranges 0...2000 ppm
(default, equivalent to the hitherto existing type of this device), 0...5000 ppm,
and 0...10000 ppm is likewise enabled via jumpers.
TECHNICAL DATA:
Power supply: .................................. 24 V AC ⁄ DC
AIR QUALITY (VOC)
Air quality sensor: .......................... VOC sensor (metal oxide)
Measuring range: ........................... 0...100 % air quality referred to calibrating gas,
Output, air quality: ......................... 0 - 10 V (0 V = clean air, 10 V = polluted air)
Measuring accuracy: ..................... ± 20 % of final value (referred to calibrating gas)
Service life: ...................................... > 60 months (under normal load conditions)
CARBON DIOXIDE (CO )
2
CO sensor: ..................................... optical sensor (NDIR),
2
Measuring range, CO : ................. multi-range switching (selectable via jumper)
2
Output CO : ..................................... 0 - 10 V or with potential-free
2
Measuring accuracy, CO : ............ ± 100 ppm
2
Pressure dependence: .................. ± 1.6 % ⁄ kPa (referred to standard pressure)
Long-term stability: ....................... ± 1 % of final value per year
Service life: ...................................... > 12 years
Gas exchange: ................................. by diffusion
Electrical connection: .................... 0.14 - 1.5 mm
Enclosure: ........................................ plastic, polyamide,
Dimensions: ..................................... 108 x 73.5 x 70 mm
Cable gland: ..................................... M16, including strain relief
Protective tube: ............................. metal, Ø 20 mm, nominal length NL = 130 mm
Protection class: ........................... III (according to EN 60 730)
Protection type: ............................. IP 65 (according to EN 60 529)
Standards: ...................................... CE-conformity,
Optional: ........................................... 8-digit display, cutout 36 x14 mm (W x H),
2
®
content in air. This CO
2
2
®
ALQ-CO sensors. The new design implies the
2
(VOC = volatile organic compounds)
multi-range switching (selectable via jumpers)
VOC sensibility: LOW – MEDIUM – HIGH
or with potential-free changeover contact (24 V)
non-dispersive infrared technology
0 ... 2000 ppm; 0 ... 5000 ppm; 0 ... 10000 ppm
changeover contact (24 V)
2 , via terminals on circuit board
30 % glass-globe-reinforced,
with quick-locking screws,
colour pure white (similar RAL 9010)
electromagnetic compatibility
according to EN 61 326 + A1 + A2,
EMC directive 2004 ⁄ 108 ⁄ EC
for displaying actual air quality (VOC)
and actual CO content (alternating)
2
ALQ-CO is used to
2 Connecting diagram
and mixed
2
measur-
2
content in air is de-
Connecting diagram
content
2
Schematic diagram
1 UB- GND
2 UB+ supply voltage 24V AC/DC
3 Output 0-10V CO -content n ppm
2
4 Output 0-10V air quality (VOC)
1 UB- GND
2 UB+ supply voltage 24V AC/DC
3 Output 0-10V CO -content n ppm
2
4 Output 0-10V air quality (VOC)
Normally open
5
contact
6
Breaker
7
CO range VOC sensibility
2
manu/auto
CO / VOC
2
Function switch
set CO
2
(ALQ-CO -W)
2
7 6 5
4 3
min. max.
ALQ - CO
2
ALQ - CO - W
2
ALQ - CO
2
ALQ - CO - W
2
manu/auto
set VOC
2 1