12
Enclosure and attachment to the
mounting surface
The CO
2
air quality sensor features a multi-
sectional, screwless enclosure made of acry-
lonitrile-butadiene-styrene (ABS) for "surface"
mounting. The enclosure material passes the
ball indentation test at 75°C. The enclosure is
120 mm in diameter and 60 mm in height.
The enclosure baseplate, together with the
electrical connection terminals and leads,
can be detached from the enclosure section
containing the sensor and secured to the
mounting surface with relative ease. The en-
closure section holding the sensor can then be
pushed onto the baseplate and, if necessary,
secured in place with the retaining screw.
Electrical connections
The supply and connection leads
for the CO
2
air quality sensor are
screw-connected to the 2-pole
screw terminal on the mounting plate.
Once the electrical connections have been
made, the sensor simply pushes onto the
mounting plate.
Assembly / Installation
The CO
2
air quality sensor is maintenance-free.
In the event of a fault, it is necessary to change
the defective CO
2
air quality sensor. For this
purpose, the part of enclosure with the sensor
can be detached from the baseplate fixed to the
mounting surface after undoing the retaining
screw (if fitted).
Care and maintenance
The CO
2
air quality sensor is equipped with a
potentiometer and a button concealed behind
a decorative ring after it is put into operation.
The potentiometer can be used for calibrating
altitude. The Fresh Air Cal. button is for cali-
brating a personal (subjective) perception of
fresh air.
Altitude calibration:
Altitude calibration must be performed once
the air quality sensor is supplied with power.
To do this, the geographical altitude at the site
of installation must be known and set at the
potentiometer (0 – 2000 m above sea level).
The 2000 setting must be used at altitudes of
more than 2000 m above sea level. After set-
ting the altitude, keep the button pressed for
approx. 5s. The sensor memorises the newly
programmed altitude after about 5s and the
button can be released. The device can be re-
turned to the factory setting with altitude cali-
brated at 0 m. (State on leaving the factory)
Setting the switching thresholds
for the LED "traffic light" display
using the Fresh Air Cal. button
You can also set the switching thresholds to
suit your own perception (subjectively). To do
this, turn the potentiometer to 0. If you feel the
air in the room is "ok" (e.g. after airing the
room), press the Fresh Air Cal. button and hold
it down for approx. 1s. The sensor registers
the current CO
2
value. Now you can let the
button go again. This procedure produces a
virtual shift in the lower point of the measure-
ment range (300 – 2000 ppm CO
2
), setting it to
400 ppm. The result is a newly defined meas-
urement range, with the switch-over thresholds
for the LED’s shifting accordingly. See graph
for an example of fresh-air calibration.
Be careful not to keep the button pressed
for too long or altitude will be re-calibrated.
Setting and "calibration"
Altitude calibration
scale (0 – 2000 m
above sea level)
Button for fresh-air
calibration (press with a
pointed object)
N
L
13
■
CE conformity according to: DIN EN 61326:1997 + A1 : 1998 + A2 : 2001
EN 60335-1 : 2002-10
■
Type of enclosure: DIN EN 60529
Declaration of conformity
This STEINEL product has been manufactured
with the utmost care, tested for proper oper-
ation and safety in accordance with applicable
regulations and then subjected to random sam-
ple inspection. STEINEL guarantees that it is in
perfect condition and proper working order.
The warranty period is 36 months, starting on
the date of sale to the consumer. We will remedy
defects caused by material flaws or manufactur-
ing faults. The warranty will be met by repair or
replacement of defective parts at our own dis-
cretion.
This warranty shall not cover damage to wearing
parts, damage or defects caused by improper
treatment or maintenance. Further consequen-
tial damage to other objects is excluded.
Claims under the warranty will only be accepted
if the unit is sent fully assembled and well
packed with a brief description of the fault,
a receipt or invoice (date of purchase and deal-
er's stamp) to the appropriate Service Centre.
Repair Service:
Our Customer Service Department will repair
faults not covered by warranty or occurring after
the warranty period has expired.
Please send the product well
packed to your nearest Service
Centre.
Functional warranty
Air quality
good
moderate
poor
New setting
(virtual)
Customer setting
(Fresh Air Cal.)
Button pressed
(Fresh Air Cal.)
Factory setting
Concentration range
BDAL_AirCheck FH_DE-GB 09.01.2006 14:42 Uhr Seite 13
