WIKA IntelliTHERM TGT73 User manual

DE
EN
Operating instructions
Betriebsanleitung
Model TGT73.100
Gas-actuated thermometer with electrical output
signal for hazardous areas, model TGT73
Gasdruckthermometer mit elektrischem Ausgangs-
signal für explosionsgefährdete Bereiche, Typ TGT73

2
DE
EN Operating instructions model TGT73 (Ex)
Page 3 - 36
Betriebsanleitung Typ TGT73 (Ex) Seite 37 - 69
© 07/2019 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!
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WIKA operating instructions model TGT73 (Ex)

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WIKA operating instructions model TGT73 (Ex) 3
Contents
Contents
1. General information 5
2. Design and function 6
2.1 Overview . . . . . . . . . . . . . . . . . . 6
2.2 Description . . . . . . . . . . . . . . . . . 6
2.3 Scope of delivery . . . . . . . . . . . . . . . 7
3. Safety 8
3.1 Explanation of symbols . . . . . . . . . . . . . 8
3.2 Intended use . . . . . . . . . . . . . . . . . 9
3.3 Improper use . . . . . . . . . . . . . . . . . 9
3.4 Responsibility of the operator . . . . . . . . . . . 10
3.5 Personnel qualification . . . . . . . . . . . . . 10
3.6 Skilled personnel . . . . . . . . . . . . . . . 11
3.7 Labelling, safety marks . . . . . . . . . . . . .11
3.8 Ex marking . . . . . . . . . . . . . . . . .12
3.9 Specifications and temperature limits . . . . . . . . 12
3.10 Special conditions for safe use (X conditions) . . . . . . 14
4. Transport, packaging and storage 15
4.1 Transport . . . . . . . . . . . . . . . . . . 15
4.2 Packaging and storage . . . . . . . . . . . . . 15
5. Commissioning, operation 16
5.1 Mechanical connection . . . . . . . . . . . . . 16
5.2 Electrical connection . . . . . . . . . . . . . . 19
5.3 Use of thermowells . . . . . . . . . . . . . . .22
5.4 Thermal contact medium . . . . . . . . . . . . . 22

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4WIKA operating instructions model TGT73 (Ex)
Declarations of conformity can be found online at www.wika.com.
Contents
6. Mounting instructions for contact bulb 23
6.1 Mounting on pipes . . . . . . . . . . . . . . . 24
6.2 Mounting on tanks . . . . . . . . . . . . . . . 24
7. Faults 25
8. Maintenance and cleaning 26
8.1 Maintenance . . . . . . . . . . . . . . . . .26
8.2 Cleaning . . . . . . . . . . . . . . . . . .27
9. Dismounting, return and disposal 28
9.1 Dismounting . . . . . . . . . . . . . . . . . 28
9.2 Return . . . . . . . . . . . . . . . . . . .29
9.3 Disposal . . . . . . . . . . . . . . . . . .30
10. Specifications 30
10.1 Electrical connection . . . . . . . . . . . . . . 31
10.2 Transmitter electronics for hazardous areas . . . . . . 31
10.3 Gas-actuated thermometer with electrical output signal . .32
Annex: EU declaration of conformity 35

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1. General information
■
The model TGT73 intelliTHERM gas-actuated thermometer
described in the 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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6WIKA operating instructions model TGT73 (Ex)
2. Design and function
2.1 Overview
Case
Dial
Pointer
Stem
Electrical connection with cable box
2.2 Description
The gas-actuated thermometer consists of a stem, capillary, Bourdon
tube and transmitter in the case.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.





2. Design and function

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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.
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 scale 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 measuring tube.
Scale ranges with accuracy class 1 per EN 13190
between -200 ... +700 °C
2.3 Scope of delivery
Cross-check scope of delivery with delivery note.
2. Design and function

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8WIKA operating instructions model TGT73 (Ex)
3. Safety
3.1 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 property or the environment, if
not avoided.
DANGER!
... identies hazards caused by electrical power. Should the
safety instructions not be observed, there is a risk of serious
or fatal injury.
WARNING!
... indicates a potentially dangerous situation in the
hazardous area that results 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.
Information
... points out useful tips, recommendations and information
for ecient and trouble-free operation.
3. Safety

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3.2 Intended use
Thermometers with output signal combine a mechanical measuring
system with electronic signal processing and are used to control
process values as well as for plant monitoring in industrial applications.
Only use the instrument in applications that lie within its technical
performance limits (e.g. temperature limits, material compatibility, ...).
→ For performance limits, see chapter 10 “Specications”
The instrument has been designed and built solely for the intended use
described here, and may only be used accordingly.
The manufacturer shall not be liable for claims of any type based on
operation contrary to the intended use.
3.3 Improper use
WARNING!
Injuries through improper use
Improper use of the instrument can lead to hazardous
situations and injuries.
▶Refrain from unauthorised modications to the
instrument.
▶Do not use the instrument with abrasive or viscous
media.
Any use beyond or dierent to the intended use is considered as
improper use.
3. Safety

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10 WIKA operating instructions model TGT73 (Ex)
3.4 Responsibility of the operator
The instrument is used in the industrial sector. The operator is therefore
responsible for legal obligations regarding safety at work.
The safety instructions within these operating instructions, as well as the
safety, accident prevention and environmental protection regulations for
the application area must be maintained.
The operator is obliged to maintain the product label in a legible condition.
To ensure safe working on the instrument, the operating company must
ensure
■
that suitable rst-aid equipment is available and aid is provided
whenever required.
■
that the operating personnel are regularly instructed in all topics
regarding work safety, rst aid and environmental protection
and know the operating instructions and, in particular, the safety
instructions contained therein.
■
that the instrument is suitable for the particular application in
accordance with its intended use.
■
that personal protective equipment is available.
On the wetted parts of the instrument, small residual
amounts of the adjustment medium (e.g. compressed air,
water, oil) can adhere from production.With increased
requirements for technical cleanliness, suitability for
the application must be checked by the operator before
commissioning.
3.5 Personnel qualication
WARNING!
Risk of injury should qualication be insucient!
Improper handling can result in considerable injury and
damage to property.
▶The activities described in these operating instructions
may only be carried out by skilled personnel who have
the qualications described below.
3. Safety