WIKA GD-20 Series User manual

Operating instructions
Betriebsanleitung
Mode d'emploi
Manual de instrucciones
EN
DE
FR
ES
Gas density sensor, model GD-20
Gasdichtesensor, Typ GD-20
Capteur de densité de gaz, type GD-20
Sensor de densidad de gas, modelo GD-20
Examples/Beispiele/Exemples/Ejemplos

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WIKA operating instructions gas densitiy sensor, model GD-20
EN
DE
FR
ES
Operating instructions model GD-20 Page 3 - 32
Betriebsanleitung Typ GD-20 Seite 33 - 62
Mode d'emploi type GD-20 Page 63 - 94
Manual de instrucciones modelo GD-20 Página 95 - 125
Further languages can be found at www.wika.com.
© 09/2020 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!
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!

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Contents
Contents
1. General information 5
2. Design and function 6
2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . 6
3. Safety 7
3.1 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . 7
3.2 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Improper use. . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4 Personnel qualification . . . . . . . . . . . . . . . . . . . . . 8
3.5 Safety instructions for use in switchgear . . . . . . . . . . . . . . . 9
3.6 Labelling, safety marks . . . . . . . . . . . . . . . . . . . . . 10
4. Transport, packaging and storage 11
4.1 Transport . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Packaging and storage . . . . . . . . . . . . . . . . . . . . . 11
5. Commissioning, operation 12
5.1 Mechanical mounting . . . . . . . . . . . . . . . . . . . . . . 12
5.1.1 Requirements for mounting point . . . . . . . . . . . . . . . . . 12
5.1.2 Installation using an adapter and measuring chambers . . . . . . . . . 12
5.1.3 Installing the instrument . . . . . . . . . . . . . . . . . . . . 13
5.2 Electrical mounting. . . . . . . . . . . . . . . . . . . . . . . 14
5.2.1 Connection assembly (model GD-20-D) . . . . . . . . . . . . . . 14
5.2.2 Pin assignment (model GD-20-D). . . . . . . . . . . . . . . . . 14
5.2.3 Requirements for shielding and grounding. . . . . . . . . . . . . . 14
5.2.4 RS-485. . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3 Modbus®. . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.4 Modbus®start-up kit . . . . . . . . . . . . . . . . . . . . . . 17
5.4.1 Establish connection to the computer . . . . . . . . . . . . . . . 17
5.4.2 Modbus®tool . . . . . . . . . . . . . . . . . . . . . . . 17
5.4.2.1 Factory settings . . . . . . . . . . . . . . . . . . . . . 18
5.4.2.2 Writing new parameters . . . . . . . . . . . . . . . . . . 18
5.4.2.3 Data logger . . . . . . . . . . . . . . . . . . . . . . . 19
5.4.2.4 Modbus®register and functional description . . . . . . . . . . . 19

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Contents
Declarations of conformity can be found online at www.wika.com
5.4.2.5 Data register, measured values . . . . . . . . . . . . . . . . 20
5.4.2.6 Configuration . . . . . . . . . . . . . . . . . . . . . . 21
5.4.2.7 Status register . . . . . . . . . . . . . . . . . . . . . . 23
5.5 Electrical mounting of model GD-20-A . . . . . . . . . . . . . . . . 24
5.5.1 Requirements for voltage supply . . . . . . . . . . . . . . . . . 24
5.5.2 Requirements for electrical connection . . . . . . . . . . . . . . . 24
5.5.3 Pin assignment (model GD-20-A). . . . . . . . . . . . . . . . . 24
5.5.4 Requirement for shielding and grounding . . . . . . . . . . . . . . 24
5.5.5 Connecting the instrument . . . . . . . . . . . . . . . . . . . 24
5.5.6 Testing the output signal for model GD-20-A, with field case. . . . . . . . 25
6. Faults 26
7. Maintenance and cleaning 26
7.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8. Dismounting, return and disposal 27
8.1 Dismounting . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.2 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9. Specications 29

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1. General information
■The gas density sensor 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 certified to ISO 9001 and ISO 14001.
■These operating instructions contain important information on handling the instru-
ment. Working safely requires that all safety instructions and work instructions are
observed.
■Observe the relevant local accident prevention regulations and general safety regula-
tions 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. Pass
the operating instructions on to the next operator or owner of the instrument.
■Skilled personnel must have carefully read and understood the operating instructions
prior to beginning any work.
■The general terms and conditions contained in the sales documentation shall apply.
■Subject to technical modifications.
■Further information:
- Internet address: www.wika.de / www.wika.com
- Relevant data sheet: SP 60.77
- Application consultant: Tel.: [phone]
Fax: [phone]
[e-mail]
1. General information

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2. Design and function
2.1 Overview
Electrical connection (depending on version)
Case, product label
Spanner flats
Process connection, thread (depending on version)
2.2 Description
The described gas density sensors are equipped with sensors for pressure and tempe-
rature. From this, the integrated microprocessor electronics calculate the status parame-
ters for the gas density of the insulating gas used using algorithms.
2.3 Scope of delivery
■Gas density sensor
■Operating instructions
Cross-check scope of delivery with delivery note.
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2. Design and function

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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.
Information
... points out useful tips, recommendations and information for efficient
and trouble-free operation.
3.2 Intended use
These gas density sensors are designed for use in plants filled with SF6gas and alterna-
tive insulating gases.There, the status variables pressure and temperature are measured
permanently. From this, the gas density sensor calculates the gas density value to assess
the plant status. It is possible to read out all the specified parameters via the RS-485 inter-
face in the Modbus®protocol (only model GD-20-D) or only the compensated pressure
value (p at 20 °C [68 °F]) by means of a 4 ... 20 mA current signal (only model GD-20-A).
The model GD-20 gas density sensors are therefore used for permanently monitoring the
stated status parameters in gas tanks.
The use of the GD-20 in dangerous process fluids (cf. pressure equipment directive fluid
group 1, see 2014/68/EU, article 13) is excluded. For a suitable product, please contact
the technical support (→ contact information at www.wika.com).
Only use the instrument in applications that lie within the technical performance limits.
The manufacturer or operator of the machine or plant in which the instrument is used
must ensure the compatibility of the wetted parts with the medium used.
The technical specifications contained in these operating instructions must be obser-
ved. Improper handling or operation of the instrument outside of its technical specifica-
tions 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.
3. Safety

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3.3 Improper use
WARNING!
Injuries through improper use
Improper use of the instrument can lead to hazardous situations and
injuries.
▶Refrain from unauthorised modifications to the instrument.
▶Do not use the instrument within hazardous areas.
The operator must ensure the compatibility of the fluid with the materials used.
Any use beyond or different to the intended use is considered as improper use.
WARNING!
Physical injuries and damage to property and the environment
through exceeding the performance limits
Exceeding the performance limits can destroy the instrument and lead to
danger in the end-use application.
▶Use the instrument only in applications within the technical performance
limits (→ for performance limits, such as derating (maximum current
supply at a corresponding medium temperature), see chapter 9 “Specifi-
cations”).
▶Any permanent operation in the overload range is not permitted. Above
the highest permissible operating pressure, up to the overload limit, the
gas density sensor is operating outside its specification.The overload
range is intended to prevent damage to the gas density sensor, as part
of a pressure vessel system, during the pressure containment test.
▶The overload limit must never be exceeded, even when failures occur
in the end-use application. Loads above the overload limit can cause
irreversible damage, which can lead, for example, to permanent
measuring errors.
▶The manufacturer or operator of the machine or plant in which the
product is used must ensure the compatibility of the materials of the
wetted parts with the medium used.
▶The gas density sensor should not be used with abrasive or unstable
fluids, in particular not with hydrogen.
3.4 Personnel qualification
WARNING!
Risk of injury should qualification be insufficient
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 qualifications described
below.
3. Safety

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Skilled personnel
Skilled personnel, authorised by the operator, are understood to be personnel who,
based on their technical training, knowledge of measurement and control technolo-
gy and on their experience and knowledge of country-specific regulations, current
standards and directives, are capable of carrying out the work described and indepen-
dently recognising potential hazards.
Special operating conditions require further appropriate knowledge, e.g. of aggressive
media.
3.5 Safety instructions for use in switchgear
WARNING!
Residual media on the dismounted gas density sensor can result in
a risk to persons, the environment and equipment.
▶Take sufficient precautionary measures.
▶Aggressive media may be present should a failure occur.
The plant operator must ensure that the handling of SF6gas is only carried out by
a qualified company or by qualified persons who have been specially trained in
accordance with IEC 61634, section 4.3.1 or IEC 60480, section 10.3.1.
Installation and plant status which can lead to the formation of atomic hydrogen in the
connection channel of the transmitter must be completely avoided.
The maximum permissible pressures must be complied with.
Valid standards and guidelines for SF6gas
Installation, assembly, commissioning:
■BGI 753 (SF6plants and equipment in Germany)
■IEC 61634 (Handling of the SF6gas)
■IEC 60376 (New SF6gas, technical grade SF6gas)
■IEC 60480 (Used SF6gas)
■CIGRE report 276, 2005 (Practical SF6gas handling instructions)
Leaks during operation:
■IEC 60376 (New SF6gas, technical grade SF6gas)
■IEC 60480 (Used SF6gas)
■CIGRE 2002 (“SF6gas in the electrical industry”)
Repair work and maintenance:
■IEC 61634 (Use and handling of SF6gas in high-voltage switchgear and controlgear)
■CIGRE 1991 (Handling of SF₆ gas)
■CIGRE report 276, 2005 (Practical SF₆ gas handling instructions)
■CIGRE report 163, 2000 (Guide for SF₆ gas mixtures)
3. Safety

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SF₆ gas is a colourless and odourless, chemically neutral, inert and
non-flammable gas which is approx. five times heavier than air, non-toxic
and not harmful to the ozone layer. Detailed information is given in IEC
60376 and IEC 61634.
3.6 Labelling, safety marks
Product label (example)
Model
Measuring range compensated pressure
Density equivalent of the full scale of the compensated pressure
Pin assignment
Logos
Coded date of manufacture
Temperature range
Communication
Supply voltage
Gas mixture
P# article number
S# serial number
Before mounting and commissioning the instrument, ensure you read
the operating instructions!
GD-20-A
DE-63911 Klingenberg
Made in Germany
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3. Safety