WIKA TGT73 User manual

D

GB

Operating instructions

Betriebsanleitung

Mode d'emploi

Manual de instrucciones

E

F

Model TGT73.100

Gas-actuated thermometer with electrical output

signal, model TGT73

Gasdruck-Thermometer mit elektrischem

Ausgangssignal, Typ TGT73

Thermomètre à dilatation de gaz avec signal de sortie

électrique, type TGT73

Termómetro de dilatación de gas con señal de salida

eléctrica, modelo TGT73

2

D

GB

E

F

Operating instructions model TGT73

Page 3 - 24

Betriebsanleitung Typ TGT73

Seite 25 - 44

Mode d'emploi type TGT73

Page 45 - 66

Manual de instrucciones modelo TGT73

Página 67 - 86

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!

Lire le mode d‘emploi avant de commencer toute opération !

A conserver pour une utilisation ultérieure !

¡Leer el manual de instrucciones antes de comenzar cualquier trabajo!

¡Guardar el manual para una eventual consulta!

14028755.02 08/2012 GB/D/F/E

WIKA operating instructions model TGT73

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WIKA operating instructions model TGT73 3

Contents

1. General information 4

2. Safety 6

3. Specications 8

4. Design and function 10

5. Transport, packaging and storage 11

6. Commissioning, operation 13

7. Mounting instructions for contact bulb 16

8. Electrical connection 18

9. Maintenance and cleaning 19

10. Faults 20

11. Dismounting, return and disposal 21

Appendix 1: EC declaration of conformity 23

Contents

Declarations of conformity can be found online at www.wika.com.

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4 WIKA operating instructions model TGT73

1. General information

■

The intelliTHERM model TGT73 gas-actuated thermometer

described in these operating instructions has 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 certied to ISO 9001

and ISO 14001.

■

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, assignment

of insuciently qualied skilled personnel or unauthorised

modications to the instrument.

■

The general terms and conditions contained in the sales

documentation shall apply.

■

Subject to technical modications.

■

Further information:

- Internet address:

www.wika.de / www.wika.com

- Relevant data sheet: TV 17.10

1. General information

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WIKA operating instructions model TGT73 5

Explanation of symbols

WARNING!

... indicates a potentially dangerous situation which can

result in serious injury or death if not avoided.

CAUTION!

... indicates a potentially dangerous situation which can

result in light injuries or damage to the equipment or the

environment if not avoided.

Information

… points out useful tips, recommendations and

information for ecient and trouble-free operation.

WARNING!

... indicates a potentially dangerous situation that can

result in burns, caused by hot surfaces or liquids, if not

avoided.

1. General information

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6 WIKA operating instructions model TGT73

2. Safety

WARNING!

Before installation, commissioning and operation, ensure

that the appropriate gas-actuated thermometer has been

selected in terms of measuring range, design and specic

measuring conditions. The compatibility of the wetted

parts of the process connection (thermowell, stem etc.)

with the medium must be tested.

Non-observance can result in serious injury and/or

damage to the equipment.

WARNING!

This is protection class 3 equipment for connection at low

voltages, which are separated from the power supply or

voltage by greater than AC 50 V or DC 120 V. Preferably,

a connection to an SELV or PELV circuit is recommended;

alternatively protective measures from HD 60346-4-41

(DIN VDE 0100-410).

Alternatively for North America:

The connection can be made in line with "Class 2

Circuits" or "Class 2 Power Units" in accordance with CEC

(Canadian Electrical Code) or NEC (National Electrical

Code).

Further important safety instructions can be found in the

individual chapters of these operating instructions.

2.1 Intended use

The gas-actuated thermometer is mainly used in the process industry

to monitor and control process temperatures.

The instrument has been designed and built solely for the intended

use described here, and may only be used accordingly.

2. Safety

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WIKA operating instructions model TGT73 7

The technical specications contained in these operating instructions

must be observed. Improper handling or operation of the instrument

outside of its technical specications requires the instrument to be

taken out of service immediately and inspected by an authorised

WIKA service engineer.

The manufacturer shall not be liable for claims of any type based on

operation contrary to the intended use.

2.2 Personnel qualication

WARNING!

Risk of injury if qualication is insucient!

Improper handling can result in considerable injury and

damage to equipment.

■

The activities described in these operating instructions

may only be carried out by skilled personnel who have

the qualications described below.

■

Keep unqualied personnel away from hazardous

areas.

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 of country-

specic regulations, current standards and directives, are capable

of carrying out the work described and independently recognising

potential hazards.

2.3 Special hazards

WARNING!

Residual media in the dismounted gas-actuated

thermometer can result in a risk to personnel, the

environment and equipment. Take sucient precautionary

measures.

2. Safety

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8 WIKA operating instructions model TGT73

2. Safety / 3. Specications

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.

3. Specications

Gas-actuated thermometer model TGT73

Measuring element Inert gas expansion system

Nominal size 100, 160

Instrument version Back mount (axial)

Lower mount (radial)

Back mount, adjustable stem and dial

Instruments with capillaries

Permissible ambient temperature 0 ... 40 °C

Working range

■

Continuous load (1 year)

■

short term (max. 24 h)

Measuring range (EN 13190)

Scale range (EN 13190)

Case, ring

Stainless steel

Stem, process connection

Stainless steel 1.4571

Ingress protection

IP 65 per IEC 60529

2.4 Product label

Date of manufacture

Model

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WIKA operating instructions model TGT73 9

Electrical data

Power supply U

B

DC 12 ≤ U

B

≤ 30 V

Inuence of power supply ≤ 0.1 % of full scale value/10 V

Permissible residual ripple ≤ 10 % ss

Output signal, variant I

4 … 20 mA, 2-wire, passive, per NAMUR NE43

Permissible max. load R

A

R

A

≤ (U

B

- 12 V)/0.02 A with R

A

in Ω and U

B

in V, however max. 600 Ω

Eect of load ≤ 0.1 % of FS

Output signal, variant II 0 ... 10 V

Impedance at voltage output 0.5 Ω

Load capacity at voltage output 2 … 100 kΩ

Sensor sampling rate 600 ms

Linearity ≤ 1.0 % of span (limit point setting)

Output signal accuracy 0.2 % of FS (electronics only)

Resolution 0.15 % of FS (10 bit resolution at 360°)

Refresh rate (measuring rate) > 1/s

Input signal, angle of rotation 0 … 270 ∢ °

Long-term stability of electronics < 0.3 % of FS/a

Temperature error, electronics < 0.3 % of FS/10 K (in overall temperature

range)

Warm-up time ≤ 5 min

Permissible ambient temperature

0 ... 40 °C

Permissible storage temperature

-40 … +70 °C without liquid damping

-20 … +70 °C with liquid damping

Electromagnetic compatibility

(EMC)

EMC directive 2004/108/EC, EN 61326

emission (group 1, class B) and interference

immunity (industrial application)

Electrical connection via angular connector, 180°

rotatable, max. 1,5 mm², cable

protection, M20 x 1.5 cable gland,

cable outer diameter 7 ... 13 mm,

incl. strain relief

Ingress protection IP 65 to IEC 60529

Protection against reverse polarity and

overvoltage

3. Specications

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10 WIKA operating instructions model TGT73

Designation of terminal

connectors dependent on the

output signal variant

Terminal

Type

1

2

3

4

5

6

Variant I

4 ... 20 mA

GND

I+

reserved

Variant II

0 ... 10 V

GND

UB+

U

out

reserved

For further specications see WIKA data sheet TV 17.10 and the

order documentation.

4. Design and function

4.1 Description

The gas-actuated thermometer consists of a stem, capillary, Bourdon

tube and transmitter in the casing. These parts are combined to form

a single unit. The entire measuring system is lled with an inert gas

under pressure.

Any change in temperature causes a change in internal pressure in

the stem, and thus a change in the shape of the pressure element.

This motion is converted, via a mechanical movement, into a

rotational motion. A magnet on the pointer shaft rotates proportionally

to the instrument pointer as a direct linear function of the process

temperature. The downstream electronics detect the rotational motion

of the magnet in the display range.

A magnetic-eld dependent rotational sensor picks up this change on

the electronics side, contact-free, wear-free and without reaction on

the pressure element.

3. Specications / 4. Design and function

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WIKA operating instructions model TGT73 11

The rotational motion is converted into an electrical signal. The

electronics are factory set to the standard 4 ... 20 mA passive or

0 ... 10 V output signal. The span of the electrical output signal

corresponds to the measuring span on the dial.

Through these two standard electrical output signals, this instrument

can be set to almost any range in the industry.

Thermometers from the intelliTHERM range with transmitters

combine all the advantages of a local mechanical display with the

industry‘s requirements for electrical signal transmission and a

modern measured value registration.

Variations in the ambient temperature acting on the case are

compensated for by a bimetal element mounted between the

movement and the Bourdon tube.

Scale ranges with accuracy class 1 per EN 13190

between -200 ... +700 °C

4.2 Scope of delivery

Cross-check the scope of delivery with the delivery note.

5. Transport, packaging and storage

5.1 Transport

Check the gas-actuated thermometer 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).

4. Design and function / 5. Transport ...

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12 WIKA operating instructions model TGT73

5.3 Storage

Permissible conditions at the place of storage:

Storage temperature: -40 … +70 °C (EN 13190) without liquid damping

-20 … +70 °C (EN 13190) with liquid damping

Avoid 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

■

Potentially explosive environments, ammable atmospheres

Store the gas-actuated thermometer in its original packaging in

a location that fulls the conditions listed above. If the original

packaging is not available, pack and store the thermometer as

described below:

1. Wrap the instrument in an antistatic plastic lm.

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..

The use of liquid damping is always recommended for

temperatures near the dew point (±1 °C around 0 °C).

5. Transport, packaging and storage

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WIKA operating instructions model TGT73 13

6. Commissioning, operation

When screwing the instruments in, the force required to do this must

not be applied through the casing, but only through the spanner ats

provided for this purpose, and using a suitable tool.

Installation with

open-ended spanner

■

If possible, the entire length of the stem should be exposed to the

temperature being measured. However, at least the length of the

active part that corresponds to the length of the gas expansion

vessel (active length).

■

In pipelines or other measuring points, the temperature probe must

be angled as far towards the ow as possible.

■

Errors in thermal conduction occur if the area where the

temperature is to be measured is so small, that the mass of the

temperature probe acts as thermal capacity. Errors in thermal

conduction may also occur if the immersion depth is insucient, if

the mounting ttings are connected to a good thermal conductor

(metal plate or similar) and there is a considerable dierence

in temperature between the measuring and mounting element

temperatures.

■

The dial casing must be mounted free from vibration. If necessary,

it is possible to isolate the instrument from the mounting point by

installing a exible connection line between the measuring point

and the thermometer and mounting the instrument on a suitable

bracket.

6. Commissioning, operation

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14 WIKA operating instructions model TGT73

6. Commissioning, operation

If this is not possible, the following limit values must not be exceeded:

Dry gauges: Frequency range < 150 Hz

Acceleration < 0.7 g (7 m/s

2

)

Liquid-lled gauges: Frequency range < 150 Hz

Acceleration < 2 g (20 m/s

2

)

The liquid lling must be checked on a regular basis.

The liquid level must not drop below 75 % of the gauge diameter.

Heavy shocks, oscillations and vibrations lead to imprecise values,

increased wear in the movement, and fractures on welded or soldered

joints.

When mounting a gas-actuated thermometer that can be rotated

and swivelled, the specic instructions must be followed. In order to

set the indicator to the desired position, the following steps must be

taken:

1. The lock nut or union nut must be loosened at the process

connection.

2. The hexagon bolts and slotted screws at the swivel joint must be

loosened.

After mounting, set the compensating valve (if

available) from CLOSE to OPEN.

loosening

Make sure the screws on the

opposite side are loosened

as well!

GB

Thermowell

Stem

Required safety

clearance

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WIKA operating instructions model TGT73 15

3. Position the indicator as required, tighten the hexagon bolts and

slotted screws, and nally tighten the lock nut or union nut rmly.

When using thermowells, they must be lled with a thermal contact

medium in order to reduce the heat transfer resistance between the

outer wall of the sensor and the inner wall of the thermowell. The

working temperature of the thermal compound is -40 ... +200 °C.

WARNING!

Do not ll hot thermowells. There is a risk of the oil

spraying out!

6. Commissioning, operation

CAUTION!

When using thermowells, please

note that the stem must not touch

the bottom of the thermowell.

Due to the dierent coecients

of expansion of the materials, the

stem can bend at the bottom of the

thermowell.

(For the formula for the calculation

of the insertion length, l

1

, see the

respective thermowell data sheet)

GB

Capillary

Bend protector

3107922.01

Tube clip mounting

Lagging

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16 WIKA operating instructions model TGT73

7. Mounting instructions for contact bulb

The contact bulb has been designed for mounting on pipes or tanks.

When mounting this thermometer version, it must be ensured that the

contact bulb is in contact with the measuring point over its complete

length. The basic requirements to ensure a perfect measurement

result is to retain good thermal contact between the skin mounted

contact bulb and the outside wall of the pipe or tank with minimal heat

loss to ambient from the skin mounted contact bulb and measuring

point.

3107876.01

7.1 Mounting to pipes

The geometry of the contact

bulb has been designed for

pipes with external diameters

between 20 and 160 mm. The

skin mounted contact bulb should

have direct metallic contact with

the measuring point and have rm

contact with the surface of the

pipe. Where temperatures under

200 °C are to be expected, a heat conducting paste can be used to

optimise the heat transmission between skin mounted contact bulb

and pipe. Lagging must be applied where the skin mounted contact

bulb has been mounted, in order to avoid error due to heat loss.

This lagging must have sucient temperature resistance and is not

provided with the instrument.

7. Mounting instructions for contact bulb

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WIKA operating instructions model TGT73 17

7.2 Mounting to vessels

The geometry of the contact bulb

has been designed for vessels

with an external radius up to

80 mm. If the mounting point

of the skin mounting contact

bulb on the tank has an external

radius greater than 80 mm,

we recommend the use of an

intermediate piece designed for the respective vessel diameter, made

of a material with good thermal conductivity. The contact bulb should

be fastened to the vessel by means of an angle bracket with clamping

screws, or any similar method. The skin mounted contact bulb should

have direct metallic contact with the measuring point and have rm

contact with the surface of the vessel.

A heat conductive paste can be used to optimise the heat

transmission between skin mounted contact bulb and the vessel,

if temperatures under 200 °C are to be expected. Lagging must be

applied where the skin mounted contact bulb has been mounted, in

order to avoid error due to heat loss. This lagging must have sucient

temperature resistance and is not provided with the instrument.

7. Mounting instructions for contact bulb

3107930.01

Angle bracket mounting

Lagging

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18 WIKA operating instructions model TGT73

8. Electrical connection

The electrical connection of the transmitter is made through an

angular connector. The exact pin assignments can be found in the

following drawings. In addition, the pin assignment, output signal and

the required power supply are stated on the product label.

Explanation of the terminal assignments used:

U

B+

Positive terminal of the power supply

0 V Negative terminal of the power supply

Sig+ Positive terminal of the output signal

Sig- Negative terminal of the output signal

The instruments must be connected to the equipotential bonding of

the plant.

Designation of terminal connectors

Terminals 1 and 2 are the connection terminals for the signal

output and the power supply, respectively. The terminal labelled

PE (protective earth) is internally connected to the casing. The

connections 3 to 6 or 4 to 6 in the 3-wire variant, should be left free

and must not be used as points (see also chapter 3 "Specications").

WARNING!

The gas-actuated thermometer with integrated rotary

encoder must be grounded through the thermometer

housing and through the ground terminal in the angular

connector.

8. Electrical connection

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WIKA operating instructions model TGT73 19

8. Electrical connection / 9. Maintenance ...

2-wire system 3-wire system

e.g. 4 ... 20 mA e.g. 0 ... 10 V

Earth, connected

to case

Terminals 3, 4, 5 and 6:

only for internal use

U

B

+/Sig+

+0V/Sig-

Evaluation

(display)

Power supply

Terminal box

Earth, connected

to case

I

out

/U

out

Terminals 4, 5 and 6:

only for internal use

U

B

+/Sig+

+0V/Sig-

Evaluation

(display)

Power supply

As a power supply, an unstabilised DC power supply is sucient, with

a max. ripple of 10 % ss in the range of the specied power supply

limits. It is important to ensure that the applied power supply is at least

greater than the maximum required voltage drop from the external

display and evaluation units; i.e. the voltage at the transmitter must

not fall below 12 V.

9. Maintenance and cleaning

9.1 Maintenance

Gas-actuated thermometers with transmitters are maintenance-free!

The indicator should be checked once or twice every year. To do this

the instrument must be disconnected from the process and checked

using a temperature calibrator.

Repairs must only be carried out by the manufacturer.

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20 WIKA operating instructions model TGT73

9.2 Cleaning

CAUTION!

■

Clean the instrument with a moist cloth.

■

Wash or clean the dismounted instrument before

returning it in order to protect personnel and the

environment from exposure to residual media.

■

Residual media in the dismounted gas-actuated

thermometer can result in a risk to personnel,

the environment and equipment. Take sucient

precautionary measures.

For information on returning the instrument see chapter

11.2 "Return".

10. Faults

Faults Causes Measures

No output signal No power supply or

cable break

Check voltage supply

and cables. Replace any

defective components found

Transmitter incorrectly

connected

Check connections; correct

connections if necessary

Electronics failure due to

too high power supply or

through external voltage

Return the instrument to the

manufacturer for repair

Constant output

signal upon change in

temperature

Power supply connected

the wrong way

(I = approx. 4.5 mA)

Check connection, and if

necessary, swap terminals

1 and 2

Transmitter fault Return the instrument to the

manufacturer for repair

Too high, constant

output signal upon

change in temperature

Electronics failure due to

too high power supply or

through external voltage

Return the instrument to the

manufacturer for repair

Signal span too small Power supply too low Rectify the power supply

Load too high Stay within the max.

permissible load

9. Maintenance and cleaning / 10. Faults

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