Operating Instructions
for
Thermal Reed Switch
Model: TRS
TRS
1. Contents
1.
2.
3.
4.
5.
6.
Contents........................................................................................................ 2
Note .............................................................................................................. 3
Regulated usage ........................................................................................... 3
Operating Principle ....................................................................................... 3
Instrument Inspection.................................................................................... 5
Use in Hazardous Areas ............................................................................... 5
6.1. General ................................................................................................ 5
6.2. Electrical Contact................................................................................. 6
6.3. Equipotential Bonding ......................................................................... 6
7. Mechanical connection ................................................................................. 6
Electrical Connection .......................................................................................... 6
9. Operation ...................................................................................................... 7
10. Technical Information ................................................................................... 8
11. Order Codes ................................................................................................. 8
12. Dimensions ................................................................................................... 9
13. Declaration of Conformance ....................................................................... 10
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: +49(0)6192-2990
Fax: +49(0)6192-23398
E-Mail: info.de@kobold.com
Internet: www.kobold.com
page 2
TRS 11/04
TRS
2. Note
Please read these operating instructions before unpacking and putting the unit
into operation, and follow the instructions precisely as described herein.
The devices are only to be used, maintained and serviced by persons familiar
with these operating instructions and with the prevailing regulation applying to
procedural safety and the prevention of accidents.
When used in machinery, the TRS should be used only when the machines fulfil
the EWG-machine guide lines.
PED 97/23/EG
In acc. with Article 3 Paragraph (3), "Sound Engineering Practice", of the
PED 97/23/EC no CE mark.
Diagram 6, Pipe, Group 1 dangerous fluids
Diagram 8, Pipe, Group 1 dangerous fluids
3. Regulated usage
The Model TRS is to be installed only in specified applications. Any usage which
exceeds the specifications is non-specified and should not be considered. Any
damage resulting from non-specified use is not the responsibility of the
manufacturer. The user assumes all risk for such usage. The application
specifications include the installation, start-up and service requirements
specified by the manufacturer.
4. Operating Principle
Thermal reed switches are used for temperature monitoring and control. They
are notable for their reliability and long service life. In addition, they have the
particular advantage of high repeatability since thermal reed switches are largely
unaffected by their service environment. For example, unlike bi-metallic
temperature switches, reed-type switches are unaffected by the load current.
Model TRS thermal reed switches are supplied in sturdy brass or stainless steel
housings with female threads (1/4" to 1”) on each side as well as a 1.5 m silicone
rubber insulated cable. They are thus suitable for use in rough-service
applications.
The temperature contacts (N/C type) have a fixed switching point (for 10 °C to
TRS 11/04
page 3
TRS
50 °C in 5 °C intervals; for 50 °C to 120 °C in 10 °C intervals)
page 4
TRS 11/04
TRS
Application
Model TRS thermal reed switches can be used in any application requiring
temperature monitoring or control.
5. Instrument Inspection
These devices are checked before shipping and sent out in perfect condition.
Should damage to a device be visible, we recommend a thorough inspection of
the delivery packing. In case of damage, please inform your parcel service/
forwarding agent immediately, since they are responsible for damages during
transit.
Scope of delivery:
The standard delivery includes the following:
� Model TRS
� Operating Instructions
6. Use in Hazardous Areas
6.1. General
The Thermal Reed Switch does not have a potential igniting source of its own.
As a mechanical operating resource, it does not get any identification according
to the guideline 94/9/EC ("ATEX 100a").
The mounted contact can be used in intrinsically safe circuits as a “simple
apparatus” according to EN 60079-14. The following limit values for the
switching contact should not be exceeded: U = 30 VDC, I = 100mA; P = 1,2 W.
The measurement units can be used as follows:
a)
In the Zone 2 (Gas-Ex, Cat. 3G) into explosion group of IIA, IIB and IIC
b)
In the Zone 22 (Dust-Ex, Category 3D) at non-conductive dusts with a
minimum igniting energy of > 3 mJ
c)
In the Zone 1 (Gas-Ex, Cat. 2G) into explosion group of IIA, IIB an IIC
d)
In the Zone 21 (Dust-Ex, Category 2D) at non-conductive dusts with a
minimum igniting energy of > 3 mJ
TRS 11/04
page 5
TRS
6.2. Electrical Contact
In the Ex-area, the Thermal Reed Switch can be used according to Category 2G
and 2D for group II; Zone 1 and 21 in connection with a switching amplifier for
protection type Ex II (2)GD [EEx ia] IIC (intrinsically safe).
The electrical connection is explained in section 8
6.3. Equipotential Bonding
The Thermal Reed Switch will allow equipotential bonding of the equipment. This
will occur only when the connection pipes are made of metal.
7. Mechanical connection
The threaded joint between reed switch fitting and piping must be sealed with
suitable thread sealing material.
The upstream and downstream pipe straight runs can be ignored.
8. Electrical Connection
BN
T
BU
GNYE
page 6
TRS 11/04
TRS
9. Operation
After mechanical and electrical connections are completed, this instrument is
ready to be placed in operation.
TRS 11/04
page 7
TRS
10. Technical Information
Materials:
Housing:
Gasket:
Cable:
Pressure:
Allowed medium temperature:
Tolerance:
Resetting hysteresis:
Contact:
Contact loading:
DC voltage:
AC voltage:
Permanent current:
Making current:
Ex-range:
Brass or stainless steel
FPM
1.5 m silicone sheathed cable
(longer cable available upon request)
brass PN 16 version
St. st. PN 25 version
- 40 °C + 120 °C
� 3 °C
� 7 °C
N/C contact with rising temperature
max. 10 W / 12 VA
max. 100 V
max. 120 V
max. 1 A
max. 0.5 A
ATEX zone as “simple operator”
We recommend service contact protection relays for switching with higher
currents and for mains operation 230 V (see broshure Z2).
11. Order Codes
Connection
female thread
G 1/4
G 3/8
G 1/2
G 3/4
G1
page 8
Housing Material
brass
TRS-1108..
TRS-1110..
TRS-1115..
TRS-1120..
TRS-1125..
stainless steel
TRS-1208..
TRS-1210..
TRS-1215..
TRS-1220..
TRS-1225..
Switching Point
(N/C for rising temperature)
...010 = 10 °C ...050 = 50 °C
...015 = 15 °C ...060 = 60 °C
...020 = 20 °C ...070 = 70 °C
...025 = 25 °C ...080 = 80 °C
...030 = 30 °C ...090 = 90 °C
...035 = 35 °C ...100 = 100 °C
...040 = 40 °C ...110 = 110 °C
...045 = 45 °C ...120 = 120 °C
TRS 11/04
TRS
12. Dimensions
50
3
l=1500
A
B
E
SW30
C
D
TRS 11/04
page 9
TRS
13. Declaration of Conformance
We, KOBOLD-Messring GmbH, Hofheim-Ts, Germany, declare under our sole
responsibility that the product:
Thermal reed switch
Model: TRS -...
to which this declaration relates is in conformity with the standards noted below:
DIN EN 61010-1
1994-03
Safety standards for electrical measuring/control and laboratory devices
DIN VDE 0470-1
1992-11
Protection type provided by housing (IP code)
The following EEC guidelines are also fulfilled:
2006/95/EC
Low voltage guidelines
Date: 2 January 2002
Signed:
H. Peters
page 10
M. Wenzel
TRS 11/04
���������������������������������������������������������������������������
���������������������������������������������������������������������������������
�����������������������������������������������������