WIKA 821 Manual de usuario

Operating instructions

Betriebsanleitung

Mode d'emploi

Manual de instrucciones

Magnetic snap-action contact model 821

in pressure and temperature gauges

Magnetspringkontakt Typ 821

in Druck- und Temperaturmessgeräten

Contact sec magnétique type 821

de manomètres et thermomètres

Contacto magnético de ruptura brusca modelo 821

en manómetros y termómetros

Magnetic snap-action contact

model 821.21 in pressure gauge

model 212.20.100

Magnetic snap-action

contact model 821.12

WIKA operating instructions magnetic snap-action contact model 821

2003325.03 03/2011 GB/D/F/E

Operating instructions model 821 Page 3-18

Betriebsanleitung Typ 821 Seite 19-34

Mode d'emploi type 821 Page 35-50

Manual de instrucciones modelo 821 Página 51-66

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 posterior!

WIKA operating instructions magnetic snap-action contact model 821 3

2003325.03 03/2011 GB/D/F/E

Contents

1. General information 4

2. Safety 5

3. Specications 8

4. Overcurrent protectors 10

5. Allocation of switch version to basic instruments

and measuring ranges 11

6. Design and function 12

7. Transport, packaging and storage 12

8. Commissioning, operation 13

9. Contact protection measures 15

10. Maintenance and cleaning 18

11. Dismounting and disposal 18

Contents

WIKA operating instructions magnetic snap-action contact model 821

2003325.03 03/2011 GB/D/F/E

1. General information

■

The magnetic snap-action contact described in the operating

instructions has been designed and manufactured by state-of-the-

art knowledge. 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 magnetic snap-action contact. 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 magnetic snap-action's range of

use.

■

The operating instructions are part of the product and must be kept in

the immediate vicinity of the instruments with magnetic snap-action

contacts and readily accessible to qualied 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

- Application consultant: Tel.: (+49) 9372/132-0

Fax: (+49) 9372/132-406

E-Mail:inf[email protected]

WIKA operating instructions magnetic snap-action contact model 821 5

2003325.03 03/2011 GB/D/F/E

1. General information / 2. Safety

Explanation of symbols

WARNING!

... indicates a potentially dangerous situation that can result

in serious injury or death, if not avoided.

Information

… points out useful tips, recommendations and information

for ecient and trouble-free operation.

2. Safety

WARNING!

Before installation, commissioning and operation, ensure

that the appropriate magnetive snap-action contact has

been selected in terms of design and specic measuring

conditions.

The instruments are no safety accessories as dened by

the pressure equipment directive 97/23/EC.

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.

WIKA operating instructions magnetic snap-action contact model 821

2003325.03 03/2011 GB/D/F/E

2. Safety

2.1 Intended use

The model 821 magnetic snap-action contact is used for the switching

of switching currents up to max. 1 A.

The magnetic snap-action contact 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.

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.

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 of independently recognising potential hazards.

2.3 Special hazards

WARNING!

When installing, commissioning and operating these instru-

ments, observe the appropriate national safety regulations

(e.g. VDE 0100).

WIKA operating instructions magnetic snap-action contact model 821 7

WARNING!

Only work on the gauge with the voltage disconnected.

WARNING!

Residual media in dismounted instruments can result in a

risk to persons, the environment and equipment.

Take sucient precautionary measures.

2.4 Labelling / Safety marks

Product label

Explanation of symbols

Before mounting and commissioning the magnetic snap-

action contact, ensure you read the operating instructions!

CE, Communauté Européenne

Instruments bearing this mark comply with the relevant

european directives.

Instruments bearing this mark on the dial are safety

pressure gauges with solid bae wall per EN 837 (S3).

2003325.03 03/2011 GB/D/F/E

2. Safety

Date of manufacture

WIKA operating instructions magnetic snap-action contact model 821

2003325.03 03/2011 GB/D/F/E

3. Specications

Table 1a: Limits for the magnetic snap-action contact model 821

Limits for the contact rating

with resistive load

Magnetic snap-action contact

model 821

dry gauges lled gauges

Rated voltage Ue max. 250 V 250 V

Rated current 1)

Make current 1.0 A 1.0 A

Breaking current 1.0 A 1.0 A

Continuous current 0.6 A 0.6 A

Contact rating max. 30 W / 50 VA 20 W / 20 VA

1) The values for rated currents shown in the above table apply to instruments with switch ver-

sion S. For instruments with switch version L these values should be halved.

(see chapter "5. Allocation of switch version to basic instruments and measuring ranges")

WARNING!

None of the limits for voltage, current and power are to be

exceeded!

We recommend the following load values to ensure safe,

continuous operation:

Table 1b: Limits for the sliding contact model 811

Limits for the contact rating

with resistive load

Sliding contact model 811

dry gauges

Rated voltage Ue max. 250 V

Rated current 1)

Make current 0.7 A

Breaking current 0.7 A

Continuous current 0.6 A

Contact rating max. 10 W / 18 VA

WIKA operating instructions magnetic snap-action contact model 821 9

2003325.03 03/2011 GB/D/F/E

Voltage

(DIN IEC 38)

Magnetic snap-action contact model 821

dry gauges lled gauges

DC / AC

resistive

load

inductive

load

cos ϕ >0.7

resistive

load

inductive

load

cos ϕ >0.7

230 100 120 65 65 90 40

110 200 240 130 130 180 85

48 300 450 200 190 330 130

24 400 600 250 250 450 150

Table 2a: Recommended contact rating for the magnetic snap-action

contact model 821

3. Specications

Voltage

(DIN IEC 38)

Sliding contact model 811

dry gauges

DC / AC

resistive load

inductive load

cos ϕ >0.7

230 40 45 25

110 80 90 45

48 120 170 70

24 200 350 100

Table 2a: Recommended contact rating for the sliding contact model 811

The switching current must not be less than 20 mA with low

voltages for switching reliability reasons. For higher loads,

and instruments with liquid-lled cases, we recommend

using WIKA contact protection relays, models 905.1x.

The ingress protection to EN 60529 against external inuences depends

on the basic instrument and is found in the respective data sheet.

The limit switches can be used in the range from -20 to +70 °C. Where

the permissible temperatures for the basic instrument (see data sheet)

deviate from this range, the lower values are valid.

For further specications see the corresponding WIKA data sheet and

the order documentation.

WIKA operating instructions magnetic snap-action contact model 821

2003325.03 03/2011 GB/D/F/E

4. Overcurrent protectors

The instruments do not provide for incorporated overcurrent protectors.

Should protectors be required, we recommend the following values in

accordance with EN 60947-5-1.

Table 3a: Overcurrent protectors with magnetic snap-action contact

Table 3b: Overcurrent protectors with sliding contact

Voltage Magnetic snap-action contact model 821

Switch version S 1) Switch version L 1)

Nominal size of instrument

63 100 160

Nominal size of instrument

63 100 160

24 1 A 2 A 2 A 0.63 A 1 A 1 A

250 0.63 A 1 A 1 A 0.315 A 0.63 A 0.63 A

Voltage Sliding contact model 811

Switch version S 1) Switch version L 1)

Nominal size of instrument

63 100 160

Nominal size of instrument

63 100 160

24 0.63 A 1 A 1 A 0.315 A 0.63 A 0.63 A

250 0.125 A 0.315 A 0.315 A 0.063 A 0.125 A 0.125 A

All data refer to miniature fuses M and a maximum short circuit current

of 100 A.

1) see chapter "5. Allocation of switch version to basic instruments and measuring ranges".

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