G
HYGRASREG
®
AH - 30
Electronic on-wall hygrostat and humidity sensor HYGRASREG
®
AH-30 with one continuous and two switching outputs, adjustable switching
thresholds, optional with or without display indicating the actual humidity, accuracy class ± 3 % r.H. It is used to control and monitor the rela-
tive humidity, e.g. in venti lation and air conditioning ducts, laboratories, production facilities, climatic test cabinets, indoor swimming pools,
greenhouses, etc. to control humidifying and dehumidifying equipment. This measuring transducer is designed for exact humidity measure-
ment.
TECHNICAL DATA:
Power supply: .............................. 24 V AC ⁄ DC (optional 230 V AC via external power supply unit)
Setting range: ............................ 5 … 95 % r. H. (switch steps 1 and 2 are separately adjustable)
Operating difference: ................ Mode 1: both switch steps are arbitrary adjustable
Mode 2: 5 % between both switch steps
Output: ......................................... potential-free changeover contact
(2 x changeover contact 24 V, separately adjustable, 1x 0 - 10 V ^= 0 - 100 % r. H.)
Sensors: ....................................... digital humidity sensor
Deviation, humidity: .................... ± 3 % r. H. (20…90 %); at + 20 °C, otherwise ± 5 % r. H.
Long-term stability: .................... ± 1 % per year
Hysteresis: .................................. max. 3 % r. H.
Sensor protection: ..................... membrane filter, exchangeable
Enclosure temperature: ............ - 10 °C ...+ 65 °C
Enclosure: .................................... plastic, material polyamide, 30 % glass-globe-reinforced,
with quick-locking screws, colour pure white (similar RAL 9010)
Dimensions: ................................. 108 x 72,5 x 70 mm
Cable gland: ................................. M16, including strain relief
Flow rate: ..................................... max. 8 m ⁄ s
Protective tube: .......................... metal, Ø 20 mm, NL = 103 mm
Protection class: ........................ I (according to EN 60 730)
Protection type:.......................... IP 65 (according to EN 60 529)
Electrical connection: ............... 0.14 - 2.5 mm
2
, via terminal screws
Standards: ................................... CE conformity, EMC directive 2004 ⁄ 108 ⁄ EC
Optional: ....................................... Single-line display, shifting, 36 x15 mm (W x H),
for displaying ACTUAL humidity respectively
for humidity setpoint adjustment
FUNCTION:
Humidifying: ................................. 1
st
step: wire contacts 4 - 5.
When actual humidity falls more than 3 % r. H. (hysteresis)
below switching threshold S1,
changeover contact switches to 4 - 5.
2
nd
step: wire contacts 7 - 8.
When actual humidity falls more than 3 % r. H. (hysteresis)
below switching threshold S 2,
changeover contact switches to 7 - 8.
Terminal 2: 1x 0 - 10 V equivalent to 0…100 % r. H.
Dehumidifying: ............................ 1
st
step: wire contacts 5 - 6.
When actual humidity exceeds switching threshold S 1,
changeover contact switches to 5 - 6.
2
nd
step: wire contacts 8 - 9.
When actual humidity exceeds switching threshold S 2,
changeover contact switches to 8 - 9.
Terminal 2: 1x 0 - 10 V ^= 0 - 100 % r. H.
Type ⁄ WG2
Setting Range
Steps
Output
Features
Humidity (relative)
AH - 30 W
5 … 95 % r. H.
2
2 x changeover contact, 1 x 0 -10 V
Internal setting
AH - 30 W - Display
5 … 95 % r. H.
2
2 x changeover contact, 1 x 0 -10 V
Internal setting, display
Optional:
for 230 V AC supply voltage via external power supply unit
