851.02.100
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
su st
Model 702.01.100 Model 702.02.100
sv
GB
D
F
Model 851.02.100
Operating instructions
GB
Model 702.01.100, 702.02.100 and 851.02.100 Page 1 - 10
Betriebsanleitung
D
Typ 702.01.100, 702.02.100 und 851.02.100 Seite 11 - 18
Mode d’emploi
F
Type 702.01.100, 702.02.100 et 851.02.100 Page 19 - 26
2080276 07/2009 GB/D/F
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WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch
Contents
Contents
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
GB
2308215 07/2009 GB/D/F
WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch
3
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,
!
GB
Caution
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
commissioning and operating 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
Data sheet PV 27.16: Differential pressure gauge with integrated working
pressure gauge and micro switch
Model 702.02.100
Data sheet PV 27.17: Differential pressure switch
Model 851.02.100
su Model 702.01.100
sv
T
3. Operating principle
The j and i measuring 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 transmitted, „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
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WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch
Illustration for example st
2122740.01
2308215 07/2009 GB/D/F
4. Installation instructions
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
GB
2308215 07/2009 GB/D/F
WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch
2123541.01
5
5. Measuring assembly / 6. Commissioning
5. Measuring assembly
Proven measuring assemblies for various types of media. Recommended setup for pressure measurement instruments are shown below.
GB
Contents of
tail pipe
Typically
Pressure
instrument
higher than
tapping point
Pressure
instrument
lower than
tapping point
Liquid Liquid with
Condensate Boiling liquid LPG Dry air
Liquid media Gaseous media
vapour
Vapour
only
Gas only Wet gas Liquid gas
Most air
Flue gas
condensate
Steam
6. Commissioning
6.1 Mounting of the pressure connection
Pressure entries identified j and i j high pressure
i low 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
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WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch
2308215 07/2009 GB/D/F
6. Commissioning
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
2157306.0X
850.33 2nd contact
850.3 1st contact
Terminal box
M20 x 1,5
or electrical connection is by means
of cable gland and cable
Cable gland
M20 x 1.5
with 1 m cable
GB
2162679.01
2162679.0X
850.3
1st contact
2123568.0X
2308215 07/2009 GB/D/F
WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch
850.33
2nd contact
7
6. Commissioning / 7. Options and accessories
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
GB
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.
Slotted
screw
Valve button
pushed
Differential pressure
is zero
8
WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch
Released
Differential pressure
is measured again
2308215 07/2009 GB/D/F
7. Options and accessories
7.2 Four-way valve manifold
Shut off j- and i process 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 (
valve) and the positive-pressure media chamber (
3. Close pressure equalising valve
Gauge valve,
high pressure
side j
Gauge valve,
low pressure
side i
j left valve)
Pressure
equalising valve
Valve for
purging or
air bleeding
i right
GB
Operating sequence for air bleeding/purging of piping
1. start: Open shut-off valve of the negative-pressure (
pressure (
j) media chamber
i) and positive-
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 (
(
j) media chamber
i) and positive-pressure
Task list for removing the transmitter during normal operation
1. Open pressure equalising valve
2. Close shut-off valve of the negative-pressure (
(
j) media chamber
3.
2308215 07/2009 GB/D/F
Open valve for purging or air bleeding
WIKA Operating instructions DELTA-plus, DELTA-comb and DELTA-switch
i) and positive-pressure
9
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