WIKA 700.02 User Manual [en, de, fr]

Operating Instructions
Betriebsanleitung
Instructions d'utilisation

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

GB

D

F

Model 700.01.80 per ATEX with
alarm contacts Model 851.3

Model 700.02.80 per ATEX with
alarm contacts Model 851.3

GB

Operating instructions Model 700.0X per ATEX
with Model 851 Page 1-11

Betriebsanleitung Typ 700.0X nach ATEX

D

mit Typ 851 Seite 13-21
Instructions d'utilisation Type 700.0X selon ATEX

F

avec Type 851 Page 23-31

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

11025867 02/2005 GB/D/F

Contents

Contents

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

GB

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

1. Safety instructions / 2. Description and operating principle

1. Safety instructions

!

Caution

GB

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.

T Do not work on gauge while under voltage

T Serious injuries and/or damage can occur should the appropriate

regulations not be observed

€T Only appropriately qualified persons should work on these

instruments

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.

T Pressures p

separated by a magnetic piston under pressure (resp. magnetic piston and
separation diaphragm for model 700.02).

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

the piston supported by the compression spring.

T The 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.

T For model 700.01 the stream of volume from the j measuring chamber to

the i measuring 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

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

and p2 are given in the j and i measuring chambers

1

11025867 02/2005 GB/D/F

3. Technical data and intended use

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

Pressure connection

T According 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

Permissible vibratory stress at the mounting location

GB

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

without vibratory stresses

T Where 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.

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

Frequency range < 150 Hz
Acceleration < 0.7 g (7 m/s

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2

)

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

4. Requirements for use in potentially explosive atmospheres

4. Requirements for use in potentially explosive

!

Note

GB

Operating Temperature

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

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.

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

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

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

instrument design, but also on the ignition temperature of the
surrounding explosive atmosphere. Both aspects have to be
taken into account.

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

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

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5. Installation

5. Installation

The installation of the differential pressure gauge is made following the
installation recommendations for pressure gauges according to EN 837-2 /7.

T The permissible maximum media / ambient temperature must not be

exceeded (see point 3)

T Prior to the installation of the pressure gauge, the pipes should be

thoroughly cleaned

T The pressure gauges should be installed and operated such as to avoid

exposure to vibrations

T The 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

GB

Drag pointer

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without Reed contact

with Reed contact

Slotted screw M 4 x 10

Plug

Reed case

Hexagon bolt
M 8 x 50 (M 8 x 100)

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

1581 007.02

6. Commissioning

6. Commissioning

6.1 Mounting of the pressure connection

Pressure entries identified j and

GB

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

ij

high pressure

i

low pressure

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

2.

Wiring scheme

Reed contact
Model 851.3 and 851.3.3

851.3. 3

2nd contact

851. 3
1st contact

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

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

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11025867 02/2005 GB/D/F

6. Commissioning / 7. Optional extras / accessories

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.

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C

A

D

C

D

B

B

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

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

GB

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.

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

11025867 02/2005 GB/D/F