S+S Regeltechnik AERASGARD RLQ Operating Instructions, Mounting & Installation page 7

G
Mounting and Installation
Automatic calibration of air quality (default), except for UP
The minimum initial value for air quality is memorized within a period of
ca. 4 weeks. After that period has lapsed, the output signal is stand-
ardised to zero-point (1.0 V). The maximum amount of correction is
thereby limited to 1 V ⁄ interval. In this way, long-term drifts and opera-
tional aging effects of the sensor element are completely eliminated.
Manual calibration of air quality, except for UP
Manual calibration can be started independently from the position of
jumper J3 by pushing the button. After connecting the device, a period
of at least 2 hours of continuous operation of the device at „normal" air
quality is to be ensured.
Manual calibration of the output signal to 1 V (zero-point) is started be
pressing the button „Manual calibration" (for ca. 5 seconds). Preparing
for calibration is indicated by a blinking LED.
Setting the output to 1 V at actual ambient conditions follows automati-
cally thereafter. During this phase, the LED is permanently activated.
After calibration is completed, the LED is deactivated.
Putting in operation
Upon energizing the device, a self-test and tempering takes place.
Depending on ambient conditions, this process takes 3 to 5 minutes.
During that time, the output analog voltage deviates from the actual
measured value.
Air quality is measured through a VOC sensor (metal oxide). Due to its functional principle, the lifetime of the sensor depends on nature and concen-
tration of the pollutant gas burden. The sensitive layer of the sensor element reacts with all volatile organic compounds and is thereby modified in its
electrical properties or "exhausted". This process results in a displacement of the characteristic curve. Such characteristic curve displacement
however amounts to less than 15 % ⁄ year under normal burden. In measuring air quality, the general condition of air quality is detected. Whether
air quality is "good" or "bad" is differently interpreted by each person.
Different pollution burdens and concentrations influence the air quality signal (0...10 Volt) in different ways. Examples for this are cigarette smoke,
deodorant sprays, cleaning agents, or also various adhesive materials for floor and wall coverings as well as dyestuffs. Increased burdens e.g. by
solvents, nicotine, hydrocarbons, aerosol propellants etc. intensify consumption ⁄ aging of the sensor element. Particularly under high pollutant gas
burdens – also during non-operational idle state periods of the devices (transport and storage) – zero-point drift will occur. Consequently, this must
be corrected at site according to the respective circumstances or basic burdens.
Air quality measuring instruments of different manufacturers cannot directly be compared because of different functional principles, preset basic
burdens (zero-point), and permitted burdens (amplification ⁄ sensitivity). Devices are preset respectively calibrated according to the sensor manufac-
turer's specifications. Here, a zero-point and a final value is determined and thus a maximum burden. In particular cases, exceeding measuring
ranges or excessive basic burdens on the devices will occur (outgassing floor carpeting, wall paint, etc.). In order to enable distinguishing different
air qualities, devices need to be adjusted by the customer according to the conditions existing on site that do not correlate to the factory-preset
definition range and calibration. Please note that factory calibration is thereby lost and compliance with technical data can no longer be guaranteed.
Type ⁄ WG1 Measuring Range
VOC
RLQ
R L Q 0 ...100 %
R L Q VA 0 ...100 %
R L Q -W 0 ...100 %
R L Q -W VA 0 ...100 %
RLQ - A ⁄ AP
R L Q - A -W 0 ...100 %
R L Q - A P -W 0 ...100 %
A = With "traffic light" (five coloured LEDs) indicating air quality (VOC).
Note: This unit must not be used as safety-relevant device!
Output Features
VOC
0 - 10 V ⁄ 4 ... 20 mA –
0 - 10 V ⁄ 4 ... 20 mA Stainless steel enclosure
0 - 10 V ⁄ 4 ... 20 mA Changeover contact
0 - 10 V ⁄ 4 ... 20 mA Changeover contact , Stainless steel enclosure
0 - 10 V ⁄ 4 ... 20 mA LED, Changeover contact
0 - 10 V ⁄ 4 ... 20 mA LED, Changeover contact , Potentiometer
VOC
(sensitivity adjustable)
VOC LOW
VOC MEDIUM (default)
VOC HIGH
VOC - Calibration mode
Automatic self-calibration
Manual calibration
Selection output (I)
Output 0 ... 20 mA
Output 4 ... 20 mA
Traffic light indication
LED VOC
fractions
Green 1 in Ordnung
Green 2 in Ordnung
Yellow 1 erhöht
Yellow 2 Significantly increased
Red Too high
DIP DIP DIP
1 2 3
O N OFF OFF
O N
OFF OFF
OFF OFF O N
DIP 4
OFF
O N
DIP 5
OFF
O N
RLQ-A ⁄ RLQ-AS
Output Output
(U) ca. (I) ca.
0...1,9 V 4,0...7,1 mA
2...3,9 V 7,2...10,4 mA
4...5,9 V 10,5...16,6 mA
6...7,9 V 16,7...16,8 mA
8 ...10 V 16,9...20,0 mA
Item No.
(without traffic light)
150 1-6120-6 000-000
150 1-4120-6 000-005
150 1-6120-6 300-000
150 1-6120-6 300-005
with traffic light
15 01-6120 -6 330-000
1 501-612 0-6330-01 0