S+S Regeltechnik HYGRASPEG AHT-30 Notice D'instruction page 7

G
Mounting and Installation
Switching
output
Gone below
preset
switchpoint
threshold
11
12 13
Falls below
the preset value with
3% r.H./1K hysteresis
Mode 1: Independent switchpoints for both relay outputs can be defined in the range of 5...95 % r.H. by the control knobs (setpoint 1 for relay 1,
setpoint 2 for relay 2, see schematic diagram). When the respective switchpoint is exceeded, the corresponding relay switches over (changeover
contact 1 switches from position 2 to position 3). When the pre-set switchpoint is undershot again by more than 3 % r.H. (hysteresis), the respective
switching output switches back to the initial position (changeover contact 1 switches from position 3 to position 2).
Mode 2: In Mode 2, only control knob setpoint 1 is active (setpoint 2 without function)! The switchpoint for the first relay is defined in the range of
5...95 % r.H. by the control knob setpoint 1 (see schematic diagram). The switchpoint for the second relay output is invariably defined in mode 2
as "Switchpoint 1 + 5 % r.H.". Hysteresis of 3 % r.H. is also predefined for each switching output in mode 2.
Mode 3: Independent switchpoints within the temperature range (selectable via DIP switches) for both relay outputs can be defined by the control knobs
(setpoint 1 for relay 1, setpoint 2 for relay 2). If the respective switchpoint is exceeded, the corresponding relay switches over. If the pre-set threshold
value is undershot again by 1 K (hysteresis), the respective switching output switches back to the initial position. The thresholds of the setting range
(temperature) are 5 °C above the minimum or below the maximum range value respectively.
Mode 4: In mode 4, the control knob is allocated to setpoint 1 of the temperature, while control knob is allocated to setpoint 2 of the relative
humidity. The switchpoints can be set within the temperature range (selectable via DIP switches) or from 5...95 % r.H. (humidity). The thresholds
of the setting range (temperature) are 5 °C above the minimum or below the maximum range value respectively.
Relay 1 switching value
Relay 2 switching status (
Relay 1 switching status (
Display readout
The 1st line of the display shows the ACTUAL humidity in % r.H. and the
ACTUAL temperature in °C. The displays showing the ACTUAL values alternate
in a 3-second rhythm. The resolution is 1/10 % r.H. or 1/10 °C.
The 3rd line shows information about the switching status of relay 1 and 2
(as circuits) on the left, and on the right for the switching values of relay 1 and 2
in % r.H. or °C (adjustable via the corresponding set potentio meter).
The reference to respective measured value (relative humidity or temperature)
is determined by the mode selected.
For improved legibility, backlighting is provided.
Zero point calibration
The sensors are pre-set and calibrated at the factory. Adjustment is possible either
for temperature or relative humidity, depending on the output allocation (DIP switch 3).
Range of adjustment: approx. ± 10 % r.H. or ± 5 K.
Switching output 1
11
12 13
Preset
switchpoint
threshold
Hysteresis
exeeded
3% r.H./1K
°C / % r.H.
Exceeding
the preset value
Relay 2 switching value
○
● ○)
⁄
●
● ○)
⁄
Gone below
preset
switchpoint
threshold
21
22 23
Falls below
the preset value with
3% r.H./1K hysteresis
Circuit, empty =
relay in idle state
Circuit, full =
DIP switches
relay energised
Function mode
Mode 1 (2x 5...95 % r.H.)
Mode 2 (5...95 % r.H. + 5 % r.H.)
Mode 3 (2x –35...+80 °C)
Mode 4 (5...95 % r.H. / –35...+80 °C)
Temperature range
–35...+35 °C
–35...+75 °C
Switching output 2
21
22 23
Preset
switchpoint
threshold
Hysteresis
exeeded
3% r.H./1K
°C / % r.H.
Exceeding
the preset value
Supply AC
→ 1
24 V∼
→ 4 0 V
12 (A1) → Relay 1 Breaker contact
11 (W1) → Relay 1 Changeover contact
13 (B1) → Relay 1 Normally open contact
22 (A2) → Relay 2 Breaker contact
21 (W2) → Relay 2 Changeover contact
23 (B2) → Relay 2 Normally open contact
0...+80 °C
0...+50 °C
Rev. 2017 - V21 GB
AHT - 30
DC
24 V DC
GND
AHT - 30
DIP 1 DIP 2
OFF OFF
O N OFF
OFF O N
O N O N
DIP 3 DIP 4
OFF OFF
O N OFF
OFF O N
O N O N