WIKA SB15 User Manual
Operating Instructions
Betriebsanleitung
Safety Temperature Limiter Model SB15
Sicherheitstemperaturbegrenzer Typ SB15
GB
D
Safety Temperature Limiter Model SB15
Operating Instructions
GB
Safety Temperature Limiter Model SB15 Page 3 - 8
Betriebsanleitung
D
Sicherheitstemperaturbegrenzer Typ SB15 Seite 9 - 17
11433094 03/2009 GB/D
WIKA Operating Instructions Safety Temperature Limiter Model SB152
Contents
Contents
1. Safety instructions
GB
4
2. Application
3. Design and operating principle
4. Technical data
5. Installation, commissioning and operation
6. Maintenance
Enclosure 1: TÜV CERT EC type examination certificate
per directive 97/23/EG (german)
Enclosure 2: DIN CERTO DIN EN 14 597 (german)
Information
This symbol provides you with information, notes and tips.
4
4
5
6
7
14 - 15
16 - 17
Warning!
This Symbol warns you against actions that can cause injury to
people or damage to the instrument.
11433094 03/2009 GB/D
WIKA Operating Instructions Safety Temperature Limiter Model SB15 3
1. Safety instructions / 2. Application / 3. Design, operating principle
1. Safety instructions
The appropriate national safety regulations (e.g. VDE 0100) must
be observed when installing, commissioning and operating
GB
Serious injuries and/or damage can occur should the appropriate
regulations not be observed.
Only appropriately qualified personnel should carry out the connection
work.
Any connection work may only be carried out once the equipment has
been isolated.
2. Application
Universally applicable safety temperature limiter for water, oil and gas.
3. Design and operating principle
The fluid-filled, closed measuring system consists of a temperature sensor, a
measuring capillary and a bourdon tube. Heating the temperature sensor leads
to a volume change in the closed system and thus a change in the pressure.
This is transferred through a measuring capillary to the bourdon tube and,
through the angular motion of the pointer shaft, to the dial on the display.
When the switch point is passed, the switch disc (cam disc), fitted to the
pointer shaft, triggers the micro switch action of the micro switch and latches
the current switch status.
these devices.
When reaching the switch point and in case of capillary-break a switch disc
(cam disc) on the pointer shaft releases the switching operation at microswitch
and unlatch the active switching status. With fixed switching points, the
switching point is indicated by an additional pointer and is written on the
instrument label.
Unlatching and resetting the working status:
The temperature limiter is unlatched by removing the plug on the window using
a screwdriver and turning the pointer shaft in an anti-clockwise direction.
(Only possible if there is no available capillary-break.)
WIKA Operating Instructions Safety Temperature Limiter Model SB154
11433094 03/2009 GB/D
4. Technical Data
4. Technical Data
Ingress protection
Case IP 53, terminals IP 00 (DIN EN 60 529 / IEC 529)
Display accuracy
Max. +4 % of the measuring range at the reference temperature of 23 °C at the
case and capillary.
Scale ranges
0 °C ... 400 °C
Permissible temperatures
Case: +60 °C
Capillary:
plastic sheathed -40 °C ... +100 °C
copper braided -40 °C ... +350 °C
Scale limits
Max. 270 °
Measuring principle
Bourdon tube system
Capillary
Plastic sheathed or copper braided,
capillary of copper or stainless steel 1.4571 depending on scale range
Capillary length
Max. 5 m
Capillary outlet
Lower back
p
GB
Contact
1 Micro switch (fixed setting)
Load data
5 A, 250 V AC
There is no overcurrent protection fitted to these instruments. In order to
prevent the switches being welded through overload, a suitable protection
device should be fitted by the user.
11433094 03/2009 GB/D
WIKA Operating Instructions Safety Temperature Limiter Model SB15 5
4. Technical data / 5. Installation, commissioning and operation
Adjustable range:
Fixed, factory pre-set to customer requirements
Standard switch differential
Unlatching after lowering (reducing) the temperature by about 3 % of scale
range possible
GB
Electrical connection
0.8 x 0.63 mm terminal block or AMP plug connection
Case
Plastic (ABS), black or steel
Type of mounting
Panel mounting with clamp
Option
Panel mounting flange
5. Installation, commissioning and operation
When fitting and using the instruments, the following
fundamental requirements must be followed:
The display range of the safety temperature alerter should be chosen
so that the maximum temperature at the sensor does not exceed the
display range. Also, after the switchpoint has been exceeded, a
resultant reheating process has to be taken into account.
In operation the equipment should not be subjected to strong vibration
or impact loads.
Contamination and high ambient temperature fluctuations should be
avoided.
Any break in the capillary will destroy the instrument and result in it
switching off.
Electrical connection
The connection diagram is shown on the instrument label on the
outer rim of the case.
WIKA Operating Instructions Safety Temperature Limiter Model SB156
11433094 03/2009 GB/D
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