S+S Regeltechnik AERASGARD AFTM-LQ-CO2 Notice D'instruction page 15

G
®
HYGRASGARD
Display
standard
By default, the display indicates the following measurements with the
corresponding units cyclically and consecutively:
CO content in ppm, air quality (VOC) in %,
2
temperature in °C, relative humidity in % r.H.
Backlighting is provided for improved legibility.
The Modbus interface allows the display to be individually configured,
both in the 7 segment range and in the dot-matrix range.
Display - individually
programmable
Schematic diagram
Plug for
display
B
4
A
3
GND
2
U+
1
AFTM- ⁄ KFTM - LQ - CO
mode
ON
1 2 3 4 5 6
CO ² VOC
zero
DIP A: Bus address
DIP B: Bus parameters
- Modbus
2
Display
alternative output variables
The Modbus interface can be used to program an alternative output
variable instead of the standard display.
In this case, the first line indicates the value while the second line
indicates the corresponding unit statically.
The index in the third line indicates the display type:
Index 1 = CO
Index 2 = air quality (VOC) in %
Index 3 = temperature in °C
Index 4 = relative humidity in % r.H.
Index 5 = atmospheric pressure in hPa
Plug for
display
Zero point calibration
The sensors are pre-set and calibrated at the factory.
Each measuring channel has a separate offset potentiometer
for subsequent adjustment of the measurement.
B
4
The adjusting range is ± 10 % of the measuring range.
A
3
GND
2
1 U+
offset
CO ² VOC r.H. °C
address
DIP B DIP A
ON
1 2 3 4 5 6 7 8
B
4
A
3
GND
2
U+
1
15
content in ppm
2
mode
ON
1 2 3 4 5 6
CO ² VOC
zero
DIP A: Bus address
DIP B: Bus parameters
(Baud rate, parity ...)
Telegram indicator
Reception (LED green)
Error (LED red)
Offset correction
LED (internal status)
Reset button
Rev. 2017 - V21 GB
offset
CO ² VOC r.H. °C
address
DIP B ON DIP A
1 2 3 4 5 6 7 8
B
4
A
3
GND
2
U+ 1