G
HYGRASREG
®
AHT - 30
Rev. 2020 - V25
Electronic on-wall hygrostat and/or on-wall thermostat
HYGRASREG
®
AHT-30
with a continuous and two switching outputs, adjustable switching
thresholds and display for indicating ACTUAL humidity and/or ACTUAL temperature (accuracy class ± 2.0 % r.H.). The setpoints can be allocated to the
relative humidity and/or to the temperature. It is suitable for regulating and monitoring relative humidity (humidifying and dehumidifying) and/or the
temperature (heating and cooling), e.g. in laboratories, production facilities, climatic test cabinets, indoor swimming pools, greenhouses, etc., to control
humidifying and dehumidifying equipment or heating system control. The measuring transducers are designed for exact humidity/temperature measurement.
The AHT-30 uses a digital, long-term stable sensor as a measuring element. It is used in dust-free, unpolluted, non-aggressive air.
TECHNICAL DATA
Power supply:
24 V AC ⁄ DC (± 20 %)
Power consumption:
< 1,5 VA ⁄ 24 V DC , < 3,5 VA ⁄ 24 V AC
Sensor:
digital humidity sensor with integrated temperature sensor,
low hysteresis, high long-term stability
Sensor protection:
plastic
sinter filter, Ø 16 mm, L = 35 mm, exchangeable
(optional
metal
sinter filter, Ø 16 mm, L = 32 mm)
Setting range:
5...95 % r.H. (humidity)
Multi-range switching with 4 switchable measuring ranges
(see table)
–35...+35 °C; –35...+75 °C; 0...+50 °C; 0...+80 °C (temperature)
(Switch steps 1 and 2 are separately adjustable)
Operating difference:
Mode 1:
both switch steps are freely adjustable (rel. humidity)
Mode 2:
5 % between both switch steps (rel. humidity)
Mode 3:
both switch steps freely adjustable (temperature)
Mode 4:
switch step 1 (temperature), switch step 2 (rel. humidity)
(adjustable via DiP switches)
Output:
potential-free changeover contacts (2 x changeover contact 24 V, 1A ohmic load, separately adjustable,
2x 0 - 10 V for U variant or 4...20 mA for I variant)
Deviation, humidity:
typically
± 2.0 %
(20...80 % r. H.) at +25 °C, otherwise ± 3.0 %
Deviation, temperature:
typically ± 0.4 K
at +25 °C
Ambient temperature:
storage –35...+85 °C;
operation – 30...+75 °C, non-precipitating
Long-term stability:
± 1 % per year
Housing:
plastic, UV-stabilised, material polyamide, 30 % glass-globe reinforced,
with quick-locking screws (slotted ⁄ Phillips head combination),
colour traffic white (similar to RAL 9016),
,
housing cover for display is transparent!
Housing dimensions:
126 x 90 x 50 mm (Tyr 2)
Cable connection:
cable gland
, plastic (M 16 x 1.5; with strain relief,
exchangeable, max. inner diameter 10.4 mm)
or
M12 connector
according to DIN EN 61076-2-101 (optional on request)
Protective tube:
stainless steel V2A
(1.4301)
,
Ø 16 mm, NL = 55 mm (see dimensional drawing)
Protection class:
III (according to EN 60 730)
Protection type:
IP 65
(according to EN 60 529)
Electrical connection:
0.14 - 1.5 mm
2
, via terminal screws
Standards:
CE conformity, EMC directive 2014 ⁄ 30 ⁄ EU
Display: three-line
display with illuminatio
n, cutout approx. 70 x 40 mm (W x H),
for displaying ACTUAL humidity and/or ACTUAL temperature or for setpoint adjustment
FUNCTION
Humidifying/heating:
1st step:
wire contacts 11 - 12. If actual humidity falls more than 3 % r.H. / 1 K (hysteresis)
below switching threshold S1, the changeover contact switches to 11 - 12.
2nd step:
wire contacts 21 - 22. If actual humidity falls more than 3 % r.H. / 1 K (hysteresis)
below switching threshold S2, the changeover contact switches to 21 - 22.
Terminal 2: output relative humidity / terminal 3: output temperature
Dehumidifying/cooling:
1st step:
wire contacts 11 - 13. When actual humidity exceeds switching threshold S1,
the changeover contact switches to 11 - 13.
2nd step:
wire contacts 21 - 23. When actual humidity exceeds switching threshold S 2,
the changeover contact switches to 21 - 23.
Terminal 2: output relative humidity / terminal 3: output temperature
HYGRASREG
®
AHT - 30
On-wall hygrostat and humidity and temperature sensor (± 2.0 %), Deluxe
Type ⁄ WG02
Setting Range
Humidity Temperature
Output
Steps Display Item No.
AHT - 30 - I
I - variant
A H T- 3 0 W-I T Y R2
5...95 % r. H.
–35...+75 °C
–35...+35 °C
0...+50 °C
0...+80 °C
2 x changeover
contact,
2x 4...20 mA
two-step
■
1202-7127-2421-000
AHT - 30 - U
U - variant
A H T- 3 0 W-U T Y R2
5...95 % r. H.
(4 x as above)
2 x changeover
contact,
2x 0 -10 V
two-step
■
1202-7127-1421-000
Optional:
Cable connection with
M12 connector
according to DIN EN 61076-2-101
on request
