22.040/1
Sauter Components
TFL 611: Continuous frost monitor with capillary sensor
How energy efficiency is improved
Demand-led, large-scale monitoring of installation parts with fully active sensor.
Areas of application
Temperature monitoring in air/water heat exchangers and air ducting with constant frost-protection
control, frost-protection switch and temperature transmission. For applications on the air side of instal-
lations.
Features
•
Measuring range: 0 to 15 °C
•
Frost point can be adjusted
•
Contact rating: 5 mA, 5 V to 6 A, 250 V
•
Start-up function
•
LED display indicating risk of frost
•
Selectable block on switching on again
•
< 40 s time constant with moving air
•
2 or 6 m copper capillary tube
Technical description
•
Two-part plastic housing
•
Ambient temperature: –15 to +60 °C
•
Controlled housing heating to safeguard measured variable
•
IP 42
•
Active from 25 cm capillary length in switching temperature
Operation
Using a vapour-filled capillary tube and diaphragm system, the frost monitor measures the lowest
temperature that occurs anywhere along at least 250 mm of the capillary tube.
If the monitor is correctly positioned at the air outlet of the heating coil, it measures the lowest temper-
ature even if there are strata of differing air temperatures. In so doing, the steam pressure causes a
movement of the diaphragm capsule in the capillary tube. By means of an inductive measuring sys-
tem, this movement is converted into an electric signal and is amplified electronically; it then creates a
0...10 V d.c. measuring signal.
X
s
T
Y
10V
B10592
1
2
3
1
2
3
X
Sd
0V
T
Y10162
Type
Capillary tube
Setting
range X
S
°C
Switching
diff. X
Sd
K
Permissible
sensor temp.
°C
Weight
kg
TFL 611 F200
1)
2 m
1...10
2
–15...110
0.34
TFL 611 F600
1)
6 m
1...10
2
–15...110
0.41
Power supply
24 V~, ± 20%
Active capillary length
3)
min. 250 mm
Power consumption
6 VA
Factory setting
5 °C
Measuring range of sensor
0...15 °C / 0…10 V=
Temp. at head of instrument
4)
–15...60 °C
Control signal output
0...10 V=, max. ± 1 mA
Degree of protection
IP 42 (EN 60529)
Max. length of cable at 1,5 mm
2
300 m
Protection class
II (IEC 60730)
Control signal input
0...10 V=, max. ± 0,1 mA
Contact rating
Wiring diagram
maximum
2)
6(4) A, 250 V~
Dimension drawing
minimum
5 mA, 5 V~/=
Fitting instructions
MV 505954
Time constant
in still air
90 s
in moving air
40 s
Accessories
Set for duct fitting consisting of: 5 capillary-tube holders, 1 depth adjustable flange
5 capillary-tube holders
Depth adjustable flange
*)
Dimension drawing or wiring diagram are available under the same number
1)
The accessory 0292146 001 for duct fitting must be ordered separately.
2)
If under inductive load, take RC circuit into account.
3)
The monitor always reacts to the coldest place (minimum length is 250 mm).
4)
The head of the instrument is frost protected for ambient temperatures up to max. -15 °C by a heating system.
7122040003 06
