WIKA TR12 Series User manual
Operating instructions
Betriebsanleitung
GB
D
Models TR12-B, TC12-B
Resistance thermometer TR12 and thermocouple TC12
Widerstandsthermometer TR12 und Thermoelement TC12
Models TR12-M, TC12-MModels TR12-A, TC12-A
GB
D
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WIKA operating instructions models TR12, TC12
Operating instructions models TR12, TC12 Page 3 - 24
Betriebsanleitung Typen TR12, TC12 Seite 25 - 45
Further languages can be found at www.wika.com.
© 2013 WIKA Alexander Wiegand SE & Co. KG
All rights reserved. / Alle Rechte vorbehalten.
WIKA® is a registered trademark in various countries.
WIKA® ist eine geschützte Marke in verschiedenen Ländern.
Prior to starting any work, read the operating instructions!
Keep for later use!
Vor Beginn aller Arbeiten Betriebsanleitung lesen!
Zum späteren Gebrauch aufbewahren!
GB
Contents
1. General information 4
2. Safety 5
3. 9
4. Design and function 12
5. Transport, packaging and storage 12
6. Commissioning, operation 15
7. Maintenance and cleaning 21
8. Faults 22
9. Dismounting, return and disposal 23
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WIKA operating instructions models TR12, TC12 3
Contents
GB
1. General information
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WIKA operating instructions models TR12, TC124
1. General information
The thermometers described in these operating instructions have been designed and
manufactured using state-of-the-art technology. All components are subject to stringent
quality and environmental criteria during production. Our management systems are
These operating instructions contain important information on handling the instrument.
Working safely requires that all safety instructions and work instructions are observed.
Observe the relevant local accident prevention regulations and general safety
regulations for the instrument's range of use.
The operating instructions are part of the product and must be kept in the immediate
vicinity of the instrument and readily accessible to skilled personnel at any time.
Skilled personnel must have carefully read and understood the operating instructions
prior to beginning any work.
The manufacturer's liability is void in the case of any damage caused by using the
product contrary to its intended use, non-compliance with these operating instructions,
the instrument.
The general terms and conditions contained in the sales documentation shall apply.
Further information:
- Internet address: www.wika.de / www.wika.com
- Relevant data sheet: TE 60.16 (TR12-A), TE 60.17 (TR12-B, TR12-M),
TE 65.16 (TC12-A), TE 65.17 (TC12-B, TC12-M)
- Application consultant:
Explanation of symbols
WARNING!
... indicates a potentially dangerous situation that can result in serious injury or
death, if not avoided.
CAUTION!
... indicates a potentially dangerous situation that can result in light injuries or
damage to equipment or the environment, if not avoided.
GB
1. General information / 2. Safety
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WIKA operating instructions models TR12, TC12 5
Information
trouble-free operation.
DANGER!
be observed, there is a risk of serious or fatal injury.
WARNING!
... indicates a potentially dangerous situation in the hazardous area that can
result in serious injury or death, if not avoided.
WARNING!
... indicates a potentially dangerous situation that can result in burns, caused by
hot surfaces or liquids, if not avoided.
Abbreviations
RTD “Resistance Temperature Detector”; resistance thermometer
TC “Thermocouple”; thermocouple
2. Safety
WARNING!
Before installation, commissioning and operation, ensure that the appropriate
thermometer has been selected in terms of measuring range, design and
Non-observance can result in serious injury and/or damage to the equipment.
Further important safety instructions can be found in the individual chapters of
these operating instructions.
2.1 Intended use
These resistance thermometers and thermocouples are used for temperature measurement
in industrial applications. They can be combined with a large number of thermowell designs.
The replaceable, centrically spring-loaded measuring insert and its extended spring travel
enable combination with the widest range of connection head designs.
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The instrument has been designed and built solely for the intended use described here, and
may only be used accordingly.
requires the instrument to be taken out of service immediately and inspected by an
authorised WIKA service engineer.
If the instrument is transported from a cold into a warm environment, the formation of
condensation may result in instrument malfunction. Before putting it back into operation,
wait for the instrument temperature and the room temperature to equalise.
The manufacturer shall not be liable for claims of any type based on operation contrary to
the intended use.
WARNING!
Improper handling can result in considerable injury and damage to equipment.
The activities described in these operating instructions may only be carried
Skilled personnel
Skilled personnel are understood to be personnel who, based on their technical training,
knowledge of measurement and control technology and on their experience and knowledge
the work described and independently recognising potential hazards.
Special operating conditions require further appropriate knowledge, e.g. of aggressive
media.
2. Safety
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2.3 Special hazards
WARNING!
liquids, and refrigeration plants, compressors, etc., in addition to all standard
regulations, the appropriate existing codes or regulations must also be followed.
WARNING!
Protection from electrostatic discharge (ESD) required.
The proper use of grounded work surfaces and personal wrist straps is required
when working with exposed circuitry (printed circuit boards), in order to prevent
static discharge from damaging sensitive electronic components.
To ensure safe working on the instrument, the operating company must ensure
required.
that the operating personnel are regularly instructed in all topics regarding
instructions and in particular, the safety instructions contained therein.
WARNING!
Residual media in the dismounted instrument can result in a risk to persons, the
Do not use this instrument in safety or emergency stop devices. Incorrect use of
the instrument can result in injury.
Should a failure occur, aggressive media with extremely high temperature and
under high pressure or vacuum may be present at the instrument.
2. Safety
GB
TR12-B-ZZZZ
1 x Pt100 / A / 3 (W) -100 ... +450 °C
EN 60751
WIKA Alexander Wiegand SE & Co.KG, D-63911 Klingenberg
Made in Germany 2013
11050SOC
TC12-B-ZZZZ
1 x Type K / 1 / . 0 ... +600 °C
EN 60584-1
WIKA Alexander Wiegand SE & Co.KG, D-63911 Klingenberg
Made in Germany 2013
11012345
TR12-B-ZZZZ
1 x Pt100 / A / 3 (W) -100 ... +450 °C
EN 60751
WIKA Alexander Wiegand SE & Co.KG, D-63911 Klingenberg
Made in Germany 2013
11050SOC
TC12-B-ZZZZ
1 x Type K / 1 / . 0 ... +600 °C
EN 60584-1
WIKA Alexander Wiegand SE & Co.KG, D-63911 Klingenberg
Made in Germany 2013
11012345
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2.4 Labelling, safety marking
Product label (example)
Resistance thermometer, model TR12
Thermocouple, model TC12
Explanation of symbols
Before mounting and commissioning the instrument, ensure you
read the operating instructions!
CE, Communauté Européenne
Instruments bearing this mark comply with the relevant European directives.
Sensor in accordance with standard
F
W Wire-wound resistor
Sensor in accordance with standard
ungrounded
grounded
Legend:
ungrounded
welded ungrounded
grounded
welded to the sheath (grounded)
Model
Year of manufacture
A = measuring insert
B = process thermometer
M = basic module
Model
Year of manufacture
A = measuring insert
B = process thermometer
M = basic module
2. Safety
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3.1 Resistance thermometer
Sensor connection method
2-wire
3-wire
4-wire
Sensor tolerance value per DIN EN 60751
Class B
Class A
Class AA
The combinations of a 2-wire connection with class A or class AA are not permissible, since
the lead resistance of the measuring insert negates the higher sensor accuracy.
Basic values and tolerance values
Basic values and tolerance values for the platinum measurement resistances are laid down
in DIN EN 60751.
-3-1
The relationship between temperature and electrical resistance is described by
Class Temperature range Tolerance value in °C
Wire-wound (W)
B -196 … +600 °C -50 … +500 ±(0.30 + 0.0050 | t |) 1)
A ±(0.15 + 0.0020 | t |) 1)
AA ±(0.10 + 0.0017 | t |) 1)
Bold: Standard version
For further technical information, see WIKA data sheet and the technical information sheet
IN 00.17 “Usage limitations and accuracies of platinum resistance thermometers per
EN 60751: 2008”.
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3.2 Thermocouples
3.2.1 Sensor types
Model
Recommended max. operating temperature
K
J
E
N
3.2.2 Potential measurement uncertainties
Important factors which counteract the long-term stability of thermocouples.
Oxidation processes in thermocouples which are not appropriately protected (“bare”
original alloys and thus falsify the characteristic curve.
The Ni leg of the type K thermocouple is often damaged by sulphur which is contained in
exhaust gases, for example. Thermocouple types J and T age slightly, as the pure metal leg
Green rot
considerable changes of the thermoelectric voltage can occur. The cause of this is a
chromium depletion or the chrome oxidation in the NiCr leg (+ leg). The precondition
for this is a low concentration of oxygen or steam in the immediate environment of the
if there is a shortage of oxygen (reducing atmosphere), since a complete oxide layer, which
would protect it from further oxidation of the chromium, cannot be formed on the surface of
the thermocouple.
The thermocouple is permanently destroyed by this process. The name green rot is derived
from the greenish shimmering colouration on the breaking point of the wire.
The thermocouple type N has in this regard an advantage due to its silicium content. Here,
a protective oxide layer forms on its surface under the same conditions.
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The NiCr leg of a type K thermocouple has an ordered alignment with respect to the
undesirable disordered crystal lattice occurs again during cooling in the range from
consistently ordered alignment state is assumed and provided with values. This results in
correspondingly slow cooling.
Thin sheathed thermocouples are particularly sensitive in this respect. Cooling in resting air
can already lead to deviations of 1 K.
alloying both legs with silicium.
The application range of these thermometers is limited both by the permissible maximum
temperature of the thermocouple and by the max. temperature of the thermowell material.
Listed models are available both as single or dual thermocouples. The thermocouple will be
Tolerance value
taken as the basis. When using a compensating cable or thermocouple cable, an additional
measuring error must be considered.
and technical information sheet IN 00.23, “Application of thermocouples”.
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WIKA operating instructions models TR12, TC1212
4. Design and function
4.1 Description
The model TR12-B (resistance thermometer) and model TC12-B (thermocouple) electrical
housing. The module is made up of a spring-loaded measuring insert (TR12-A, TC12-A)
built into a neck tube. The measuring insert (TR12-A, TC12-A) is replaceable.
The active measuring component of the measuring insert is manufactured from a welded
tube or from mineral-insulated cable, optionally in combination with ceramic-insulated
thermocouple wires. The sensor is embedded in ceramic powder, heat-resistant potting
compound, cement compound or thermally conductive paste.
If the temperature sensor is designed as a grounded thermocouple, the thermocouple is
joined directly to the sheath. Designs with a diameter smaller than 3 mm and with grounded
thermocouples should be considered as galvanically connected with earth potential.
The connection side of the measuring insert consists of a transition sleeve with connected
connection wires.
CAUTION!
Thermometers of this model range must be installed with a thermowell. The
design of the thermowell can be selected as desired, but the operational
account.
Possible sensor measuring ranges:
The following mounting and operating information has been compiled with care. However, it
is not possible to consider all potential usage cases.
4. Design and function
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Legend:
Neck tube
Thread to the thermowell
Measuring insert
Thread to the connection head
A(U2) Insertion length
(tapered thread)
A(L1) Insertion length
(parallel thread)
NL Nominal length
N(MH)Neck length
tapered
thread
parallel
Thread
14013854.02
parallel
Thread
tapered
thread
fabricated neck tube
(neck tube welded)
“nipple-union-nipple”
neck tube tapered
thread
parallel thread with
counter nut
4.2 Technical description of the three variants
TR12-B, TC12-B
Variant 1
TR12-B, TC12-B
Variant 2
TR12-B, TC12-B
Variant 3
Thread
TR12-M, TC12-M
Module
Thread
Thread Thread Thread
Legend:
Connection head
Neck tube
Connection to thermowell
Measuring insert
Terminal block
Transmitter (option)
Field transmitters
4.3 Neck tube version
4. Design and function
Tmax
Tmax
Tmax
Tmax
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Connection head, selectable (example)
Thread Tightening torques in Nm
Connection head material
Aluminium Stainless steel
1/2 NPT 32 35
3/4 NPT 36 40
M20 x 1.5, with counter nut 1) 23 25
M24 x 1.5, with counter nut 1) 27 30
1) only for versions with non-divisible neck tube
Tightening torques between connection head and neck tube
Tightening torques for connection to thermowell
Tightening torques for connection to neck tube
Thread Tightening torques in Nm
R 1/2 1) 50 ... 60
1) only for versions with “nipple-union-nipple” neck tube
Thread Tightening torques in Nm
1/2 NPT 35
3/4 NPT 40
G 1/2 B 35
G 3/4 B 40
M14 x 1.5 25 ... 30
M18 x 1.5 35
M20 x 1.5 35 ... 40
M27 x 2 40 ... 45
torque using an appropriate tool.
The correct torque depends on the dimensions of the connection thread and the gasket
used (form/material).
When screwing in or unscrewing the instrument, do not use the connection head as
contact surface.
When screwing in the instrument, please observe that the threads are not skewed.
4.6 Scope of delivery
Cross-check scope of delivery with delivery note.
4.4 Housing- and connection heads
The dimensions of the housing and connection heads are given in the respective data sheet.
4.5 Tightening torques
4. Design and function
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5. Transport, packaging and storage
5.1 Transport
Check the instrument for any damage that may have been caused by transport.
Obvious damage must be reported immediately.
5.2 Packaging
Do not remove packaging until just before mounting.
Keep the packaging as it will provide optimum protection during transport (e.g. change in
installation site, sending for repair).
5.3 Storage
Permissible conditions at the place of storage:
Storage temperature:
Instruments without built-in transmitter:
Instruments with built-in transmitter: see operating instructions of the corresp. transmitter
Humidity: 35 ... 85 % relative humidity (no condensation)
Avoidance of exposure to the following factors:
Direct sunlight or proximity to hot objects
Mechanical vibration, mechanical shock (putting it down hard)
Soot, vapour, dust and corrosive gases
above. If the original packaging is not available, pack and store the instrument as described
below:
2. Place the instrument along with shock-absorbent material in the packaging.
3. If stored for a prolonged period of time (more than 30 days), place a bag containing a
desiccant inside the packaging.
WARNING!
Before storing the instrument (following operation), remove any residual media.
This is of particular importance if the medium is hazardous to health, e.g.
caustic, toxic, carcinogenic, radioactive, etc.
6. Commissioning, operation
WARNING!
When the thermometer is mounted, the temperature must not drop below the
allowed operating temperature (environment, medium) or exceed it, even when
taking convection and heat radiation into account!
5. Transport, packaging ... / 6. Commissioning, operation
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WIKA operating instructions models TR12, TC1216
WARNING!
Thermometers must be earthed if dangerous voltages could be expected at the
connection wires (caused, for example, by mechanical damage, electrostatic
discharge or induction)!
6.1 Electrical connection
CAUTION!
Damage to cables and wires, and to connection points must be avoided
Both the internal capacitance and inductance must be considered
The electrical connection is to be made according to the sensor connections/pin
assignments shown below:
Resistance thermometers with terminal block
red
1 x Pt100, 2-wire 1 x Pt100, 3-wire 1 x Pt100, 4-wire
white white
red
red
red
red white
white
white white white
white
red
red red
red
red
2 x Pt100, 2-wire 2 x Pt100, 3-wire 2 x Pt100, 4-wire
red
white
white
red
red
white
black
yellow yellow yellow
black black
white
white
red
red
red
red
black
black
black
black
yellow yellow
yellow
red
white
black
yellow
white
6. Commissioning, operation
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Resistance thermometers with connection cable
Thermocouples with terminal block
3166822.03
Single thermocouple Dual thermocouple
The colour coding at the
positive connection to the
devices always decides the
correlation of polarity and
connection terminal.
1 x Pt100, 2-wire 1 x Pt100, 3-wire 1 x Pt100, 4-wire
2 x Pt100, 2-wire
red
white white
red
2 x Pt100, 3-wire
red
white
white
red
red
yellow
white
yellow
black
white
red
black
black
red
red
Thermocouples with connection cable
Single thermocouple Dual thermocouple
Colour code of cable
Sensor type Standard Positive Negative
K DIN EN 60584 green white
J DIN EN 60584 black white
E DIN EN 60584 violet white
N DIN EN 60584 pink white
6. Commissioning, operation
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Variant 1
chapter 6.1 “Electrical Connection” or the data sheets TE 60.17 (for TR12) and TE 65.17
(for TC12).
Variant 2
refer to the relevant operating instructions and/or data sheet for the built-in head-mounted
transmitter.
Variant 3
transmitter.
Variant 1 and 2
Junction between cable gland and connection head
M20 x 1.5 thread: Tightening torques 12 Nm
½ NPT thread: Tightening torques 30 Nm
Junction between cable and cable gland
Screw the male nut tightly into the adapter (use appropriate tools!)
During installation, take care to
Avoid distorting the cable sheath when tightening the male nut.
Avoid cutting too deep into the cable sheath.
Use suitable cable.
Be careful of the clamping zone of the cable gland.
Requirements for meeting ingress protection
Only use cable glands within their indicated clamping range (cable diameter suitable for
the cable gland)
Do not use the lower clamping area with very soft cable types
Only use circular cross-section cables (if necessary, slightly oval in cross-section)
Do not twist the cable
Repeated opening/closing is possible; however only if necessary, as it might have a
tightened
CAUTION!
The protection class is not valid with armoured cables (stainless steel
sheathed)
Seal should be checked for signs of brittleness and, if necessary, replaced
6. Commissioning, operation
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6.2 Removal and installation of the measuring insert
The bare wires have a cross-section of approx. 0.22 mm², are 150 mm long and are colour-
coded dependent upon the sensor type.
The measuring insert is secured against twisting.
Before removing the measuring insert, fully disconnect the
electrical connections to the terminal block or transmitter.
After that, the neck tube can be loosened and unscrewed from the head.
Removed measuring insert with neck tube:
6. Commissioning, operation
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To disconnect the measuring insert
from the neck tube, loosen the M16
bolt at the top end of the neck tube
and unscrew it.
The installation of the measuring insert is carried out
in the reverse order (clean the measuring insert prior
to installation).
The hexagonal crimped tip of the measuring insert is
guided by the screw-in of the hexagonal socket screw.
Tightening torque of the screw: 12 ... 14 Nm
6. Commissioning, operation
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