ENGLISH
DPDQ 502000
including mounting flange
DPDQ 502000
APPLICATION:
Patented quality product (patent no. DE 10 2014 010 719.1)
The maintenance-free, microprocessor-controlled duct sensor is used to monitor the CO
2
con-
centration as well as air quality (VOC). All measurands are converted to standard signals (0 -10 V
or 4...20 mA). The duct sensor 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. The CO
2
content of
the air is measured using an optical NDIR sensor (non-dispersive infra-red technology). The detec-
tion range of the sensors 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 CO
2
sensor. The explanations above demonstrate that there are
applications for CO
2
measurements, for VOC measure ments, 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
2
measuring instrument measures selectively and cannot detect any VOC; a VOC mixed gas sensor cannot
recognize CO
2
molecules.
TECHNICAL DATA:
Power supply:
24 V AC ⁄ DC (± 10 %)
Power consumption:
< 4.8 W ⁄ 24 V DC typical; < 6.8 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
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)
including atmospheric pressure compensation (up to 1100 mbar)
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:
–10...+60 °C
Operating range, humidity:
0...95 % r. H. (without dew formation)
Response time:
< 2 minutes
Electrical connection:
0.14 - 1.5 mm
2
, via screw terminals
Enclosure:
plastic, polyamide, 30 % glass-globe reinforced, with quick-locking screws
(slotted ⁄ Phillips head combination), colour traffic white (similar to RAL 9016)
Enclosure dimensions:
126 x 90 x 50 mm
Cable gland:
M 16 x 1.5; including strain relief, exchangeable
Protective tube:
PLEUROFORM
TM
, material polyamide (PA6), with torsion protection,
Ø 20 mm, v
max
= 30 m/s (air), NL = 202.5 mm
Process connection:
via flange made of plastic (included in scope of delivery)
Protection class:
III (according to EN 60 730)
Protection type:
IP 65 (according to EN 60 529) enclosure only! (PLEUROFORM IP 30)
Standards:
CE conformity, electromagnetic compatibility according to EN 61 326,
EMC Directive 2014 ⁄ 30 ⁄ EU
