WIKA Delta-comb Manual de usuario

Model 851.02.100

Model 702.01.100 Model 702.02.100

su st

Operating Instructions

Betriebsanleitung

Mode d'emploi

Differential pressure gauges

Model 702.01.100, 702.02.100 and 851.02.100

Differenzdruckmessgeräte

Typ 702.01.100, 702.02.100 und 851.02.100

Manomètres pour pression différentielle

Type 702.01.100, 702.02.100 et 851.02.100

2080276 07/2009 GB/D/F

WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch

Operating instructions

Model 702.01.100, 702.02.100 and 851.02.100 Page 1 - 10

Betriebsanleitung

Typ 702.01.100, 702.02.100 und 851.02.100 Seite 11 - 18

Mode d’emploi

Type 702.01.100, 702.02.100 et 851.02.100 Page 19 - 26

1. Safety instructions 4

2. General 4

3. Operating principle 4

4. Installation instructions 5

5. Measuring assembly 6

6. Comissioning 6

7. Options and accessories 8

8. Storage 10

9. Maintenance and servicing / cleaning 10

10. Repairs 10

11. Disposal 10

WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch 3

2308215 07/2009 GB/D/F

Contents

WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch

Caution

2122740.01

Illustration for example st

2308215 07/2009 GB/D/F

1. Safety instructions ... 3. Operating principle

1. Safety instructions

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

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

commissioning and operating these instruments.

Do not work on gauge while under voltage (applies to Model 702.02/03.100

and 851.02.100)

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

not be observed

Only appropriately qualified personnel should work on these instruments

2. General

These operating instructions are based on the following information:

EN 837-2: Selection and installation recommendations for pressure gauges

Data sheet PM 07.15: Differential pressure gauge with integrated working

pressure gauge su Model 702.01.100

Data sheet PV 27.16: Differential pressure gauge with integrated working

pressure gauge and micro switch T

Model 702.02.100

Data sheet PV 27.17: Differential pressure switch sv

Model 851.02.100

3. Operating principle

The jand imeasuring medium chambers

are separated by an elastic diaphragm.

The differential pressure causes an

axial movement (measured travel) in the

diaphragm against the measuring range

spring. The measured travel is proportional

to the differential pressure and is trans-

mitted, „pressure sealed“ and with minimal

friction, via a connecting rod; for:

su to the movement

st to the movement

and in addition to the plungers

on the microswitches

sv to the plungers

on the microswitches



WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch 5

2308215 07/2009 GB/D/F

4. Installation instructions

Installation of the differential pressure gauge should follow the installation

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

The maximum permissible medium / ambient temperature must not be

exceeded

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

thoroughly cleaned by tapping, blowing or rinsing

The pressure gauges must be protected against contamination and high

temperature fluctuations!

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

exposure to vibration. If the line to the pressure gauge is not robust enough

to prevent vibration it should be secured by means of brackets for wall

mounting.

Wall mounting

Installation using the three integral, cast mounting brackets



2123541.01

WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch

Contents of

tail pipe

Liquid media Gaseous media

Liquid Liquid with

vapour

Vapour

only

Gas only Wet gas Liquid gas

condensate

Typically Condensate Boiling liquid LPG Dry air Most air

Flue gas Steam

Pressure

instrument

higher than

tapping point

Pressure

instrument

lower than

tapping point

2308215 07/2009 GB/D/F

5. Measuring assembly

Proven measuring assemblies for various types of media. Recommended set-

up for pressure measurement instruments are shown below.

5. Measuring assembly / 6. Commissioning

6. Commissioning

6.1 Mounting of the pressure connection

Pressure entries identified jand ijhigh pressure

ilow pressure

6.2 Wiring details

(applies to Model 702.02.100 and 851.02.100)

The electrical connections should be made by qualified electricians

Connection details and switch functions are given on the instrument rating

plate. Connection terminals (1 ... 6) and the ground terminal are appropriately

marked.

The mains connection lines to be provided must be suitable for maximum

instrument power consumption and comply with IEC 227 or IEC 245

The instruments must be included in the equipotential bonding of the plant



WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch 7

2308215 07/2009 GB/D/F

st and sv:

Power ratings (see data sheet)

Precise wiring schemes can be seen in the following drawings.

In addition to the wiring details and required power supply are given on the type

plate.

Electrical connection is by means

of terminal box or L-plug per DIN 43 651

6. Commissioning

or electrical connection is by means

of cable gland and cable

2162679.01

M20 x 1,5

2157306.0X

Terminal box

850.33 2nd contact

850.3 1st contact

850.33

2nd contact

2162679.0X

2123568.0X

Cable gland

M20 x 1.5

with 1 m cable

850.3

1st contact

WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch

Differential pressure

is zero

Differential pressure

is measured again

Released

Valve button

pushed

2308215 07/2009 GB/D/F

6.3 Setting the switch point / checking the zero point

The switch points are set at the factory when the desired values are given. The

adjustment of the switch point is made by setpoint screws accessible from the

front. The assistant scales enable a relatively accurate adjustment of the switch

points over 270 p° and indicate the setpoint that is momentarily adjusted.

For contact re-adjustment the snap-fit window is to be lifted off using a screw

driver at the recess in the circumference. The desired switch point can be set

by turning the contact adjustment screws with a screw driver.

If a more accurate switch point adjustment is desired, a test variable should be

used.

Afterwards press the window back into the case.

To check zero point see below

7. Options and accessories

7.1 Integrated pressure equalising valve

The zero point check during the working

process is enabled by pushing the valve

button. The measuring medium flows from

the higher pressure side to the opposite

side and the differential pressure drops to

zero.

st and sv:

When the valve button is pushed, the differential pressure pointer must move

into the range of the zero point tolerance bar. As a consequence the function

of the instrument is in order. In the case of possible deviations beyond the

tolerance bar a zero point correction can be made via a standard integrated

adjustment pointer. For that purpose the snap-fit window

is to be lifted off using a screw driver at the impression/

recess in the circumference. The zero point is corrected

by turning the slotted screw at the adjustment pointer.

Afterwards the window is to be snap-fitted to the case

again. The differential pressure is indicated again, as soon

as the valve button is released.

6. Commissioning / 7. Options and accessories

Slotted

screw

WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch 9

2308215 07/2009 GB/D/F

7. Options and accessories

7.2 Four-way valve manifold

Shut off j- and iprocess line for disassembling and testing of

measuring instrument without interrupting the process that is running.

Protect the instrument against inadmissible

overpressure loading, such as, for example, in

the case of pressure tests and undefined

operating conditions (also temporary shut down).

Pressure equalising for zero point check during

normal operation as well as equalisation of the

pressures at high pressure and low pressure

side during start-up and operation (with opened

pressure equalising valve).

Process line air bleeding for liquid measuring

media and purging the process line for removing

impurities.

7.2.1 Handling instructions

Work sequence to start measuring

1. Open pressure equalising valve (middle valve)

2. Open shut-off valve of the negative-pressure media chamber (iright

valve) and the positive-pressure media chamber (jleft valve)

3. Close pressure equalising valve

Operating sequence for air bleeding/purging of piping

1. start: Open shut-off valve of the negative-pressure (i) and positive-

pressure (j) media chamber

Open pressure equalising valve and valve for purging or air bleeding

2. end: Close pressure equalising valve and valve for purging or air bleeding

Procedure at the end of the measuring operation

(also for partial system shut-down)

1. Open pressure equalising valve

2. Close shut-off valve of the negative-pressure (i) and positive-pressure

(j) media chamber

Task list for removing the transmitter during normal operation

1. Open pressure equalising valve

2. Close shut-off valve of the negative-pressure (i) and positive-pressure

(j) media chamber

3. Open valve for purging or air bleeding



Gauge valve,

low pressure

side i

Pressure

equalising valve

Gauge valve,

high pressure

side j

Valve for

purging or

air bleeding

WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch

2308215 07/2009 GB/D/F

7.3 Front flange for panel mounting

8. Storage

Before installation, in order to prevent damage from the pressure gauges, follow

the subsequent points:

The pressure gauge should remain in its original packing until installation

After taking out the pressure gauge (e.g. for tests) reuse the original

packaging material

Storage temperature should not exceed -20 °C ... +60 °C

Pressure gauges should be protected against dust and humidity

9. Maintenance and servicing / cleaning

These WIKA differential pressure gauges will give very long service when

handled and operated properly. Control and safety devices are to be checked

for their efficiency (see also VDI 3033 Table1).

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

solution. The residual pressure medium in dismounted pressure gauges may be

hazardous or toxic. This should be considered when handling and storing the

removed pressure gauges.

10. Repairs

Repairs should only be carried out by the manufacturer or appropriately trained

personnel. For further technical details see WIKA data sheet PM 07.15,

PV 27.16 or PV 27.17.

11. 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.



Panel

2123649.0Y

Panel cut-out

7. Options and accessories ... 11. Disposal

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