S+S Regeltechnik HYGRASREG KW Mode D'emploi page 7

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HYGRASREG ® TW
The dew point control switch HYGRASREG
or coldwater piping, or on cooled surfaces. It reliably detects formation of dew by means
of its humidity and temperature sensor (no conductivity measurement) and, thanks to
its measuring method, pro-dynamic cross convection, yields an exact measurement result.
Dew point temperature is that temperature at which air reaches the state of saturation
and water vapour starts to condensate. Facilitated by the measuring range of 0...100 % r. H.
of the TW-U and by the adjustable threshold value of 75...100 % r. H. of the TW-W, it is
possible for example to operate cooling ceilings so that the switching output of the dew point
monitor, the DDC, is activated and thereby a heater or other control elements are triggered
and so formation of dew is avoided before dew builds up on pipes or cooling ceilings of the
object to be monitored.
TECHNICAL DATA:
Power supply: ........................ 24 V AC (± 20 %)
Power consumption: ................ < 1.1 VA ⁄ 24 V DC
Measuring Range: ................... 0 ...100 % r. H., TW-U, continuous
Sensors: ............................... digital humidity sensor
Sensor protection: .................. membrane filter
Output signal: ........................ 0 -10 V or potential-free changeover contact (24 V)
Process connection: ................ endless metal strap with metal tightener,
Electrical connection: .............. 0.14 - 1.5 mm², via terminal screws
Enclosure: ............................. plastic, material polyamide,
Dimensions: ........................... 72 x 64 x 37.8 mm (Thor III without display)
Cable gland: ........................... M 16 x 1.5 , including strain relief, exchangeable,
Mounting: .............................. TW - Pipe including strap
Protection class: .................... III (according to EN 60 730)
Protection type: ..................... IP 65 (according to EN 60 529)
Standards: ............................ CE conformity, electromagnetic compatibility
Connecting diagram
UB+ supply voltage 24V AC/DC
1
2 free
3 GND
Normally
13
open contact
11
Breaker
12
Typ ⁄ WG1 Measuring Range
Designation Humidity
TW
T W- U / W R O H R 0 ...100 % r. H.
T W- U R O H R 0 ...100 % r. H.
T W-W R O H R 75 ...100 % r. H.
TW
T W-W E X T E R N 75 ...100 % r. H.
®
TW is installed on cooling ceilings, on cooling
15 ... 36 V DC (± 10 %)
< 2.2 VA ⁄ 24 V AC
75 ...100 % r. H., TW-W, adjustable,
generation of dew is detected,
switching value can be adjusted via potentiometer
with integrated temperature sensor,
dew-proof, small hysteresis, high long-term stability
300 mm, for pipes up to 3 " diameter
(included in the scope of delivery)
30 % glass-globe-reinforced,
with quick-locking screws
(slotted ⁄ Phillips head combination),
colour pure white (similar RAL 9010)
max. inner diameter 10.4 mm
for installation directly on pipes
TW - external with detached sensor head
(cable length 1.5 m) for mounting on pipes
according to EN 61 326 + A1 + A2,
EMC directive 2004 ⁄ 108 ⁄ EC
TW - W Connecting diagram
UB+ supply voltage 24V AC/DC
1
2 Output bedewing 0-10V (continuous)
3 GND
Normally
13
changeover
open contact
11
(24 V)
Breaker
12
Output
Humidity
0 -10 V + Changeover contact
0 -10 V
Changeover contact
Changeover contact
Schematic diagram
Schematic diagram
Schematic diagram
min.
–
Offset ±10%
TW - UW
Connecting diagram
1 UB+ supply voltage 24V AC/DC
changeover
Output bedewing 0-10V (continuous)
2
(24 V)
3
GND
Mounting
for mounting directly on pipes
for mounting directly on pipes
for mounting directly on pipes
for mounting on pipes
TW - W
Switchpoint
min. max.
setting
100%
75%
75% - 100% r.H.
1 2 3 13 11 12
TW - UW
Switchpoint
min. max.
setting
100%
75%
75% - 100% r.H.
1 2 3 13 11 12
TW - U
max.
+
1 2 3
TW - U
Item No.
Sensor internal
12 0 2- 10 12 - 10 01 - 02 0
12 01 - 10 11 - 10 01 -0 2 0
12 02 - 10 15 - 00 01 -0 0 0
Sensor external
12 02 - 10 15 - 00 21 -0 3 0