WIKA GDM-RC-100 Mode d'emploi

Operating instructions

Betriebsanleitung

Mode d’emploi

Manual de instrucciones

EN

DE

FR

ES

Gas density monitor with reference chamber, model GDM-RC-100

Gasdichtewächter mit Referenzkammer, Typ GDM-RC-100

Densimètre pour gaz avec chambre de référence, type GDM-RC-100

Densímetro con cámara de referencia, modelo GDM-RC-100

Gas density monitor with reference chamber

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WIKA operating instructions, model GDM-RC-100

EN

DE

FR

ES

Operating instructions model GDM-RC-100 Page 3 - 28

Betriebsanleitung Typ GDM-RC-100 Seite 29 - 54

Mode d‘emploi type GDM-RC-100 Page 55 - 80

Manual de instrucciones modelo GDM-RC-100 Página 81 - 106

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

1. General information 4

2. Design and function 5

3. Safety 6

4. Transport, packaging and storage 11

5. Commissioning, operation 12

6. Faults 20

7. Maintenance, cleaning and recalibration 21

8. Dismounting, return and disposal 23

9. Specifications 24

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

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1. General information

■

The gas density monitor 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

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. 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 60.27

- Application consultant:

Tel.: +49 9372 132-0

Fax: +49 9372 132-406

info@wika.com

1. General information

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2. Design and function

2.1 Overview



Electrical connection, cable socket



Lasered product label



Process connection

2.2 Description

The micro switch contacts permanently built into the gas density monitor act as change-

over contacts and switch if compensated limiting pressure values have been set. The

micro switch contacts are actuated by a bellows system integrated into the instrument

when the gas density value drops and rises.

2.3 Scope of delivery

Cross-check scope of delivery with delivery note.

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

The intended use of model GDM-RC-100 is to monitor the gas density of insulating

gases.

Wherever the gas density of SF₆ gas has to be indicated locally and, at the same time,

circuits need to be switched, the model GDM-RC-100 gas density monitor finds its use.

Gas density monitors are modified pressure measuring instruments with switch

contacts, specially developed for the use of SF₆ gas and other insulating gases.

Temperature influences acting on the enclosed gas are compensated by a

compensation system.

The gas density monitors are specially designed for the respective application in

switchgear (pure SF₆ gas, gas mixtures, calibration pressure, switch points ...). Before

use, check whether this instrument is suitable for the intended application.

The insulation values (air gaps and creepage distances) are sized for the following

ambient conditions in accordance with EN 61010-1:2010:

■

Altitude up to 2,000 m

■

Overvoltage category II

■

Pollution degree 2

■

Relative humidity: 0 ... 95 % non-condensing (per DIN 40040)

Only use the instrument in applications that lie within its technical performance limits

(e.g. max. ambient temperature, material compatibility, ...).

→ For performance limits, see chapter 9 “Specifications”.

This instrument is not permitted to be used in hazardous areas!

3. Safety

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The instrument has been designed and built solely for the intended use described here,

and may only be used accordingly.

The technical specifications contained in these operating instructions must be

observed. Improper handling or operation of the instrument outside of its technical

specifications 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.

3.3 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 open the instrument while under voltage.

▶

Do not use the instrument within hazardous areas.

The instrument must not be subjected to any external loading (e.g. use as a climbing

aid, support for objects).

Any use beyond or different to the intended use is considered as improper use.

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 first-aid equipment is available and aid is provided whenever required.

■

that the operating personnel are regularly instructed in all topics regarding work

safety, first 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.

3. Safety

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3.5 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.

Skilled personnel

Skilled personnel, authorised by the operator, 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-specific regulations,

current standards and directives, are capable of carrying out the work described and

independently recognising potential hazards.

Specically when using SF₆ gas

The plant operator must ensure that the handling of SF

6

gas is only carried out by a

qualied company or by qualied persons who have been specially trained in accord-

ance with IEC 61634, section 4.3.1 or IEC 60480, section 10.3.1.

3.6 Personal protective equipment

The personal protective equipment is designed to protect the skilled personnel from

hazards that could impair their safety or health during work. When carrying out the

various tasks on and with the instrument, the skilled personnel must wear personal

protective equipment.

Follow the instructions displayed in the work area regarding personal protective

equipment!

The requisite personal protective equipment must be provided by the operating

company.

Safety goggles in accordance with EN 166, class 2, mechanical

strength class S

Safety goggles must be worn during the entire period when working on

hoses or gas containers (e.g. gas cylinders, tanks).

The safety goggles protect the eyes from any flying particles, escaping

gas and liquid splashes.

Protective gloves against heat in accordance with EN ISO 13732-1

and against cold in accordance with EN ISO 13732-3

The protective gloves must be worn over the entire period when working

on hoses, gas containers (e.g. gas cylinders, tanks) or components which

heat up to over 60 °C.

3. Safety

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3.7 Handling of insulating gases and gas mixtures

SF₆ gas is a greenhouse gas which is listed in the Kyoto Protocol. SF₆ gas must not be

released into the atmosphere, but must be collected in suitable containers.

Properties of insulating gases

■

Colourless and odourless

■

Chemically neutral

■

Inert

■

Not flammable

■

Heavier than air

■

No toxicity

■

No damage to the ozone layer

Detailed information is given in IEC 60376 and IEC 61634.

Danger of suocation caused by insulating gases and gas mixtures

High concentrations of gases can lead to asphyxiation, since breathable air is displaced

from the lungs with the inhalation of gas.

Since SF₆ gas is heavier than air, it collects, especially, at ground level or lower-lying

rooms below the reference level (e.g. cellars). This is particularly dangerous since SF

6

gas is colourless and odourless and thus may be imperceptible to people.

3.8 Danger caused by decomposition products

Insulating gas in electrical systems may contain decomposition products generated by

electric arcs:

■

Gaseous sulphur fluorides

■

Sulphur hexafluorides

■

Solid and atomized metal fluorides, metal sulphides, metal oxides

■

Hydrogen fluoride

■

Sulphur dioxide

Decomposition products can be harmful to health.

■

They can cause poisoning by inhalation, ingestion or contact with the skin.

■

They may be irritating to the eyes, the respiratory system or the skin and burn them.

■

Inhalation of large quantities may damage the lungs.

Observe the following safety instructions in order to avoid danger from insulating gas:

■

Wear personal protective equipment.

■

Read the material safety data sheet of the gas supplier.

■

With large leaks, evacuate the area quickly.

■

Ensure good ventilation.

■

Ensure the leak tightness of the equipment with a leak detector (e.g. model GIR-10).

3. Safety

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3. Safety

3.9 Applicable standards and directives for installation, assembly, commissioning:

■

BGI 753 (SF₆ plants and equipment in Germany)

■

IEC 61634 (Handling of SF₆ gas)

■

IEC 60376 (New SF₆ gas, technical grade SF₆ gas)

■

IEC 60480 (Used SF₆ gas)

■

CIGRE report 276, 2005 (Practical SF₆ gas handling instructions)

Leaks during operation:

■

IEC 60376 (New SF₆ gas, technical grade SF₆ gas)

■

IEC 60480 (Used SF₆ gas)

■

CIGRE 2002 (“SF₆ gas in the electrical industry”)

SF

6

is a colourless and odourless, chemically neutral, inert and non-amma-

ble gas which is approx. ve times heavier than air, non-toxic and not harmful

to the ozone layer.

Detailed information is given in IEC 60376 and IEC 61634.

3.10 Labelling, safety marks

Product label (example)



















Model designation



Position and number of switch points



Measuring range



Permissible ambient temperature



Electrical characteristics



Article number



Date of manufacture



IP class

Before mounting and commissioning the instrument, ensure you read

the operating instructions!

S1: 0.61 MPa @ 20

℃

SF6 , Falling

S2: 0.55 MPa @ 20

℃

SF6 , Falling

S3: 0.55 MPa @ 20

℃

SF6 , Falling

S4: 0.67 MPa @ 20

℃

SF6 , Rising

RANGE: -0.1 ... 1.15 MPa @ 20

℃

SF6

T

a

: -40...70

℃

@ max. 5 A

>70...80

℃

@ max. 1 A

12...250 V AC (50…60Hz) / DC

max. 5 A @ 250 V AC / 30 V DC

max. 0.25 A @ 250 V DC

Product/E- No.: 64408712 11/19 IP65

WIKA Alexander Wiegand SE & Co. KG

63911 Klingenberg

Gas Density Monitor GDM-RC-100

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4. Transport, packaging and storage

4.1 Transport

Check the gas density monitor for any damage that may have been caused by transport.

Obvious damage must be reported immediately.

CAUTION!

Damage through improper transport

With improper transport, a high level of damage to property can occur.

▶

When unloading packed goods upon delivery as well as during

internal transport, proceed carefully and observe the symbols on the

packaging.

▶

With internal transport, observe the instructions in chapter 5.2

“Packaging and storage”.

4.2 Packaging and storage

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).

WARNING!

Physical injuries and damage to property and the environment

caused by hazardous decomposition products

Before storing the instrument, any residual decomposition products must

be removed.

▶

For cleaning, see chapter 7.2 “Cleaning”

Permissible conditions at the place of storage:

■

Storage temperature (basic product): -40 ... +80 °C

■

Storage temperature (low-temperature version): -50 ... +80 °C

■

Humidity: ≤ 95 % r. h. (no condensation)

Avoid exposure to the following factors:

■

Soot, vapour, dust and corrosive gases

■

Hazardous environments, flammable atmospheres

Store the instrument in its original packaging in a location that fulfils the conditions

listed above. If the original packaging is not available, pack and store the instrument as

described below:

1. Place the instrument, along with the shock-absorbent material, in the packaging.

2. If stored for a prolonged period of time (more than 30 days), place a bag containing

a desiccant inside the packaging.

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5. Commissioning, operation

5.1 Mechanical mounting

CAUTION!

Physical injuries and damage to property and the environment

through faulty instrument

Prior to commissioning, the instrument must be subjected to a visual

inspection. Only use the instrument if it is in perfect condition with respect

to safety.

5.1.1 Requirements for the installation point

■

For outdoor applications, the selected installation location has to be suitable for the

specified ingress protection, so that the instrument is not exposed to impermissible

weather conditions.

■

The sealing faces at the instrument and at the measuring point have to be

undamaged and clean.

5.1.2 Installation

■

With transport or storage, it can occur that gas density monitors warm up or cool down

and this results in pointer movements. These pointer movements are caused by the

compensation system. To make sure that the instruments have adapted sufficiently to

ambient temperature, at least 2 hours at 20 °C must be allowed for adaptation to the

temperature. Then, in the depressurised state, the pointer will sit within the tolerance

bar.

■

Corresponding to the general technical rules for pressure gauges (e.g. EN 837-2

“Selection and installation recommendations for pressure gauges”) when screwing in

the instrument, the force required to do this must not be applied through the case, but

only through the spanner flats provided for this purpose and using a suitable tool.

■

When screwing in, do not tilt the threads.

For parallel threads, use flat gaskets, lens-type sealing rings or WIKA profile sealings at the

sealing face . With tapered threads (e.g. NPT threads), sealing is made in the threads ,

using a suitable sealing material (EN 837-2).

The tightening torque depends on the sealing used. In order to orientate the measuring

instrument so that it can be read as well as possible, a connection with LH-RH union or

union nut should be used. When a blow-out device is fitted to an instrument, it must be

protected against being blocked by debris and dirt.

Sealing in the thread 

Spanner ats

Sealing face 

5. Commissioning, operation

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5.1.3 Temperature load

The installation of the instrument should be made in such a way that the permissible

operating temperature, also considering the effects of convection and thermal radiation,

neither exceeds nor falls below the permissible limits.

The influence of temperature on the indication and measurement accuracy must be

observed.

5.2 Electrical connection

5.2.1 Connection lead

With the selection of connection leads, the following points must be noted:

■

Conductor cross-section must be selected corresponding to the load current/

overcurrent protection device.

■

The sealing range of the supplied cable gland must fit the conductor diameter.

■

The temperature range of the cable must correspond, as a minimum, to the operating

temperature range of the instrument.

→ For specifications, see chapter 9 “Specifications”.

5.2.2 Grounding

■

The main instrument must be grounded via the process connection.

■

Fasten the protective conductor of the connecting cable for the switch contacts to the

terminal (1) provided for this purpose as shown in the figure below.

■

Never remove the protective conductor connection cable (2) between the main

instrument and the counterpart of the cable socket. Otherwise, operational safety

cannot be ensured.





5. Commissioning, operation

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5.2.3 Connection terminals and wire preparation

The connection terminals are suitable for the following types of single conductor or

cross-sections:

Connection terminals and wire preparation

Connection terminals of

the socket terminal strip

Connection terminals of

the protective conductor

Types of single

conductors

■

Solid wire core

■

Flexible strand

■

Flexible strand with end splice

■

Solid wire core

■

Flexible strand with end splice

Wire length ≥ 90 mm ≥ 120 mm

Maximum length of

the bare wire end

Max. 5.5 mm Max. 8 mm

Number of wires /

Cross-sections

1 x 0.5 mm² to 1 x 2.5 mm²

Recommended

tightening torque

0.5 Nm 1.2 Nm

5.2.4 Switch contacts

■

The position of the switch points and the switching functions are indicated on the

product label.

■

The assignment of the individual switching functions is marked on a sticker affixed to

the mating connector at the terminal:

Wiring scheme

First digit

■

1x – Switch contact S1

■

2x – Switch contact S2

■

3x – Switch contact S3

■

4x – Switch contact S4

Second digit

■

x1 – Common

■

x2 – Normally closed

■

x3 – Normally open

5. Commissioning, operation

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Wiring scheme

Schematic diagram of the switch behaviour with rising or falling gas density over time:

The actual order of the switch points is customer-specific.

If the gas density monitor is not pressurised, all contacts are not actuated mechanically.

Fourth switch point: Pin 41 is connected to pin 42 (1).

If the gas density monitor is pressurised, an overtravel of the switch point will switch the

switch contact from pins 41-42 to pins 41-43.

The switch contact will not be switched back from pins 41-43 to pins 41-42 until the

value drops below the switching threshold.

S4S3S2S1

12

13

11

21

23

22

32

33

31

41

43

42

Status of switching output: Not pressurised

GDM-RC-100

Terminal

Wiring scheme

SP1

SP2

SP3

SP4

P

@ 20 °C

t

S1

S2

S3

S4

11 - 13

11 - 12

21 - 23

21- 22

31 - 33

31 - 32

41 - 43

41 - 42







Switches Terminals

5. Commissioning, operation

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Up to four switch contacts allow all desired switching functions to be completely

covered. Depending on the application requirement, falling closing, falling opening,

rising closing or rising opening can be switched.

The switch contacts are adjusted for either falling or rising density.

It is recommended to always switch only in the switching direction adjust-

ed ex works, since otherwise the switch hysteresis of the switch contact

also has to be taken into account.

→ Detailed information regarding hysteresis see data sheet SP 60.27

Examples for switching functions in the application

1. Example with three contacts as normally closed: Contacts 1 and 2 should open when

value drops below threshold, and contact 3 should open when threshold is exceeded:

S3S2S1

12

13

11

21

23

22

32

33

31

41

43

42

Status of switching output: Not pressurised

GDM-RC-100

Terminal

Connection example - three contacts

Falling

opening

Falling

opening

Rising

opening

5. Commissioning, operation

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2. Example with two contacts as normally open: Contacts 1 and 2 should close when

values drops below threshold:

5.2.5 Closing the cable socket

■

Ensure that no moisture can enter at the cable end.

■

For this, make sure that the cable gland of the assembled case cover fits the

diameter of the cable used and that the cable gland is correctly seated.

■

Make sure that the seals are present and undamaged.

■

Tighten the cable gland with the torque specified in the specifications ( see chapter

9 “Specifications”) and check that the seal is correctly seated, in order to ensure the

ingress protection.

5.2.6 Limit values for the contact load with resistive load

Do not exceed the limit values.

The switching current must not be less than 10 mA with low voltages (12 V) for switching

reliability reasons.

Overcurrent protectors

The instruments do not provide for incorporated overcurrent protectors. Therefore,

overcurrent protection devices with the following nominal values must be used on the

system side:

■

Max. 5 A (at T

a

: -40 … +70 °C)

■

Max. 1 A (at T

a

: > 70 … 80 °C)

If overcurrent protection devices in accordance with EN 60127-2 or

equivalent are used, these must be selected with a high breaking capac-

ity (e.g. H1500A).

S2S1

12

13

11

21

23

22

32

33

31

41

43

42

GDM-RC-100

Terminal

Falling

closing

Falling

closing

Connection example - two contacts

Status of switching output: Not pressurised

5. Commissioning, operation

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5.2.7 Contact protection measures

Mechanical contacts must not exceed the specified electrical values for switching

current, switching voltage and switching power independent of each other, not even for

a short time only.

For capacitive or inductive loads one of the following protective circuits is

recommended:

Inductive load with DC voltage

With DC voltage the contact protection can be achieved via a free-wheeling diode,

connected in parallel to the load. The polarity of the diode must be arranged so that it

closes when the operating voltage is on.

Inductive load with AC voltage

With AC voltage two protection measures are possible:

Example:

Contact protection

measure with free-

wheeling diode

Contact

Diode

Load

Example:

Contact protection

measure with voltage-

dependent resistor VDR

Example:

Contact protection

measure with RC element

Load

5. Commissioning, operation

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Capacitive load

With capacitive loads elevated switch-on currents arise. These can be reduced by

series-connecting resistors in the supply line.

5.3 Switch point setting

The switch points have a fixed setting as standard and cannot be adjusted. Thus, an

undesired adjustment of the switch points is excluded.

Examples: Contact protection measure with current-limiting resistor

Load Load

U

B

R

1

U

B

R

1

5. Commissioning, operation

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6. Faults

CAUTION!

Physical injuries and damage to property and the environment

If faults cannot be eliminated by means of the listed measures, the gas

density monitor must be taken out of operation immediately.

▶

Ensure that pressure or signal is no longer present and protect against

accidental commissioning.

▶

Contact the manufacturer.

▶

If a return is needed, please follow the instructions given in chapter 9.2

“Return”.

For contact details see chapter 1 “General information” or the back page

of the operating instructions.

Faults Causes Measures

Contact is no longer

switching in accordance

with the specification.

Electrical connection is

interrupted.

Carry out a continuity test on

the electrical connection lines.

Electrical load unsuitable for

the switch contact model.

Maintain the permissible

electrical loads for the switch

contact model.

Contact contaminated.

Switching status remains

unchanged despite

reaching the switch point/

reset point.

Contacts defective (e.g. fused

contact zone).

Replace instrument. Before

recommissioning the

new instrument, provide

a protective circuit for the

contact.

No pointer movement

despite change in

pressure.

Movement blocked. Replace instrument.

Pointer movement, even

though depressurised.

Warming or cooling of the

measuring instrument (no

damage)

Let the instrument settle for 2

hours at 20 °C.

For claims, the serial and product numbers must be stated. The serial number is printed

on the dial, the product number on the product label. With claims, the atmospheric

pressure and the temperature during the measurement must be given, as well as the

data on the reference standard (model, class).

6. Faults

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