WIKA 7000 Series Manuel utilisateur

Pressure gauges Model 700.0X per directive 94/9/EC (ATEX)

with alarm contacts Model 851

Druckmessgeräte Typ 700.0X nach Richtlinie 94/9/EG (ATEX)

mit Grenzsignalgeber Typ 851

Manomètres Type 700.0X selon directive 94/9/EG (ATEX)

avec contacts d'alarme Type 851

II 2 GD c

Model 700.01.80 per ATEX with

alarm contacts Model 851.3

Model 700.02.80 per ATEX with

alarm contacts Model 851.3

Operating Instructions

Betriebsanleitung

Instructions d'utilisation

2WIKA Operating instructions pressure gauges Model 700.0X with 851 per ATEX

11025867 02/2005 GB/D/F

GB Operating instructions Model 700.0X per ATEX

with Model 851 Page 1-11

Betriebsanleitung Typ 700.0X nach ATEX

mit Typ 851 Seite 13-21

Instructions d'utilisation Type 700.0X selon ATEX

avec Type 851 Page 23-31

3WIKA Operating instructions pressure gauges Model 700.0X with 851 per ATEX

11025867 02/2005 GB/D/F

Contents

1. Safety instructions 4

2. Description and operating principle 4

3. Technical data and intended use 5

4. Requirements for use in potentially explosive

atmospheres 6

5. Installation 7

6. Commissioning 8

7. Optional extras / accessories 9

8. Maintenance and servicing / cleaning 10

9. Repairs 10

10. Disposal 10

Enclosure 1: Declaration of conformity for Models 700.0X

with alarm sensors Model 851 11

4WIKA Operating instructions pressure gauges Model 700.0X with 851 per ATEX

11025867 02/2005 GB/D/F

Caution

1. Safety instructions

The appropriate national safety regulations (i.e. VDE 0100 /

EN 60 079-14 / EN 837-2) must be observed when installing,

putting into operation and running these instruments.

TDo not work on gauge while under voltage

TSerious injuries and/or damage can occur should the appropriate

regulations not be observed

€TOnly appropriately qualified persons should work on these

instruments

1. Safety instructions / 2. Description and operating principle

2. Description and operating principle

The pressure gauges measure the pressure differential between two connection

points by means of a piston loaded on both sides, which is supported by a

compression spring. Depending on the differential pressure measured the

optional alarm contact switches as soon as the set switch point is reached.

TPressures p1and p2are given in the jand imeasuring chambers

separated by a magnetic piston under pressure (resp. magnetic piston and

separation diaphragm for model 700.02).

TThe difference in pressure causes an axial movement (measuring travel) of

the piston supported by the compression spring.

TThe measuring path resulting from this is taken up by a ring magnet found

on the instrument pointer and appropriately displayed. This design combines

the advantage of a complete separation of the measuring system and the

indication and eliminates any leakage to the exterior.

TFor model 700.01 the stream of volume from the jmeasuring chamber to

the imeasuring chamber is minimized by the constructive design and will

not interfere with the process.

These measuring instruments are mainly intended for gas / air supply and

preparation applications where no magnetic particles are involved.

In processes with floating particles model 700.02 should be used.

Further information on the gauge design see data sheet PM 07.14

5WIKA Operating instructions pressure gauges Model 700.0X with 851 per ATEX

11025867 02/2005 GB/D/F

3. Technical data and intended use

Pressure connection

TAccording to the general technical regulations for pressure gauges,

respectively (i.e. EN 837-2 "Selection and installation recommendations for

pressure gauges").

When screw-fitting the gauges the force required for sealing must not be

applied through the case or terminal box but, using a suitable tool, only through

the spanner flats provided for this purpose at the square of the connector.

IP Ingress protection

IP 54 per EN 60 529 / IEC 60 529

3. Technical data and intended use

Static pressure / Overpressure safety maximum

Model Working pressure Overpressure safe

Pressure ranges max. either side

(static pressure)

Model 700.01:

0 ... 400 mbar to 0 ... 10 bar optionally 100, 250 to maximum

or 400 bar working pressure

Typ 700.02:

0 ... 160 mbar and 0 ... 250 mbar 50 bar 50 bar

0 ... 400 mbar and 0 ... 2.5 bar 100 bar 50 bar

Permissible vibratory stress at the mounting location

TAs a matter of principle the instruments should only be mounted at locations

without vibratory stresses

TWhere required, a decoupling from the mounting location can be achieved

e.g. by a flexible connecting line from the measuring point to the pressure

gauge and mounting via a measuring instrument bracket.

TIf this is not possible, the following limits must not be exceeded:

Frequency range < 150 Hz

Acceleration < 0.7 g (7 m/s2)

6WIKA Operating instructions pressure gauges Model 700.0X with 851 per ATEX

11025867 02/2005 GB/D/F

4. Requirements for use in potentially explosive atmospheres

4. Requirements for use in potentially explosive

atmospheres

The built-in Reed contacts do not have their own ignition source.

They are 'simple apparatus' in terms of intrinsic safety as defined in

EN 50 020.

When supplied from a tested and certified intrinsically safe circuit

(associated apparatus), these switches may be used in potentially

explosive atmospheres up to category 2 without having to take any

further measures.

Note

Temperature class of Permissible maximum medium

the ambient atmosphere temperature (in the pressure system)

(ignition temperature)

T 6 ( > 85 °C) +70 °C

T 5 ( > 100 °C) +85 °C

all other temperature classes +100 °C

Alarm contacts

Especially conceived to allow low current circuits to be switched

directly, switch point may be set by means of adjusting screws

from the exterior in a range of 10 ... 100 % of full scale value.

Max. switching voltage: 30 VDC / VAC

Max. load: 3 W

Max. strength of current: 0.2 A

Switching hysteresis: 5 % of full scale value

Operating Temperature

Ambient (for use in potentially explosive atmospheres): 0 ... +60 °C

Medium: The permissible medium temperature does not only depend on the

instrument design, but also on the ignition temperature of the

surrounding explosive atmosphere. Both aspects have to be

taken into account.

Attention! With gaseous substances the temperature may increase as a result

of the compression temperature. In such cases the pressure change rate has to

be slowed down resp. the permissible medium temperature has to be reduced.

Permissible medium temperature

7WIKA Operating instructions pressure gauges Model 700.0X with 851 per ATEX

11025867 02/2005 GB/D/F

5. Installation

The installation of the differential pressure gauge is made following the

installation recommendations for pressure gauges according to EN 837-2 /7.

TThe permissible maximum media / ambient temperature must not be

exceeded (see point 3)

TPrior to the installation of the pressure gauge, the pipes should be

thoroughly cleaned

TThe pressure gauges should be installed and operated such as to avoid

exposure to vibrations

TThe pressure gauges should be protected against contamination and high

temperature fluctuations

To avoid foreign matter in the measuring system and the resulting damage to

the system the pressure gauge is to be mounted above the connector. For

measuring media containing floating particles model 700.02 should be used.

If the line to the pressure gauge is not robust enough for vibrationless mounting

it should be fastened by means of an appropriate fastening element for wall

fitting or if necessary be made through a capillary.

Wall mounting (see drawing)

Installation / fastening by means of mounting brackets

Hexagon bolt

M 8 x 50 (M 8 x 100)

1581 007.02

Drag pointer

Plug

without Reed contact

with Reed contact

Slotted screw M 4 x 10

Reed case

8WIKA Operating instructions pressure gauges Model 700.0X with 851 per ATEX

11025867 02/2005 GB/D/F

6. Commissioning

6.1 Mounting of the pressure connection

Pressure entries identified jand ij

high pressure

ilow pressure

Hold against the connection pieces in the case of installation by means of

17 mm screw spanner(installation by means of the screws without holding

against the connection pieces may cause the measuring system to get loose).

6.2 Wiring details

Connection of the switches via screw terminals in the terminal box.

Terminal assignment see wiring scheme below.

Conductor cross section max. 1.5 mm

Wiring scheme

Reed contact

Model 851.3 and 851.3.3

851.3. 3 2nd contact

851. 3 1st contact

Terminal box

The gauges do not

provide for incorporated

overcurrent protectors.

If overcurrent protectors

are requested, these have

to be provided

for externally.

6.3 Setting the switching point

Preference should be given to setting the switching point before installing the

measuring instrument. The necessary test path is generated by hand (for

example, by means of a antimagnetic screw driver).

Manual generation

of test: Plus measuring

media chamber

antimagnetic

The switching point can be set after installation even when under pressure.

The switching point is set by turning the contact setscrew on the outside of the

reed case.

By turning anti clockwise:

switching point moves in the direction

of the start of the measuring range

By turning clockwise:

the switching point moves towards the end

of the measuring range

Attention: The instrument is to be included in the equipotential bonding of the plant!

9WIKA Operating instructions pressure gauges Model 700.0X with 851 per ATEX

11025867 02/2005 GB/D/F

6.4 To check zero point

In general the zero point is checked and set in pressureless state.

The fastening of the measuring system lug on the back of the case has to be

slackened for zero point correction. Now the zero point can be readjusted by

moving the measuring system to the right or left. After this has been done the

measuring system is to be secured again (max. tightening torque 2.5 Nm).

During the commissioning process pressure peaks must be absolutely avoided.

Open the shut-off valves slowly.

7. Optional extras / accessories

7.1 Panel mounting flange (only for model 700.01, see left picture)

The panel mounting flange may be retrofitted by the customer locally.

Alignment of the front ring (A) by means of the stamped cams to the grooves

found on the periphery of the case. Push front ring on the case until it snaps into

position.

7.2 Minimum or maximum drag pointer (see pictures)

The drag pointer (B) serves to monitor and control the minimum or maximum

occurring differential pressure.

7.3 Reed contact Model 851.3 and 851.3.3 (see pictures)

The Reed contacts may be retrofitted and adjusted by the customer locally.

Fastening is by means of two screws (D) integrated in the switch case (C)

with the pertinent inner thread in the display case.

6. Commissioning / 7. Optional extras / accessories

10 WIKA Operating instructions pressure gauges Model 700.0X with 851 per ATEX

11025867 02/2005 GB/D/F

8. Maintenance and servicing / cleaning ... 7. Disposal

8. Maintenance and servicing / cleaning

The instruments require no maintenance or servicing.

The indicator and switching function should be checked once or twice every

12 months. The instrument must be disconnected from the process to check

with a pressure testing device.

The instruments should be cleaned with a damp cloth moistened with soap

solution.

9. Repairs

Repairs are to be only carried out by the manufacturer or appropriately trained

personnel.

For further details see WIKA data sheet PM 07.14.

10. Disposal

Dispose of instrument components and packaging materials in accordance with

the respective waste treatment and disposal regulations of the region or country

to which the instrument is supplied.

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