WIKA Delta-plus User manual

EN
DE
Operating instructions
Betriebsanleitung
DELTA-switch
Model DPG40
Dierential pressure gauges,
models DPG40, DPGS40 and DPS40
Dierenzdruckmessgeräte,
Typen DPG40, DPGS40 und DPS40
DELTA-plus
Model DPS40
Model DPGS40
DELTA-comb

EN
DE
2
14093265.04 04/2016 EN/DE
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch
© 2014 WIKA Alexander Wiegand SE & Co. KG
All rights reserved. / Alle Rechte vorbehalten.
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!
Operating instructions, dierential pressure gauges,
models DPG40, DPGS40 and DPS40 Page 3 - 24
Betriebsanleitung Dierenzdruckmessgeräte,
Typen DPG40, DPGS40 und DPS40 Seite 25 - 46

EN
Contents
1. General information 4
2. Safety 5
3. Specications 8
4. Design and function 11
5. Transport, packaging and storage 14
6. Commissioning, operation 15
7. Options and accessories 22
8. Maintenance 24
9. Dismounting, return and disposal 24
Contents
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch 3
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Declarations of conformity can be found online at www.wika.com.

EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch4
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1. General information
■
The dierential pressure gauges described in the operating instructions
have been designed and manufactured using state-of-the-art technology.
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
instrument. 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 instrument's range of use.
■
The operating instructions are part of the product and must be kept in the
immediate vicinity of the instrument and readily accessible to skilled 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
- Relevant data sheets: PM 07.20, PV 27.20, PV 27.21
- For Ex version: Additional Information for hazardous areas (Ex i)
1. General information
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.

EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch 5
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2. Safety
2. Safety
WARNING!
Before installation, commissioning and operation, ensure that
the appropriate dierential pressure gauge has been selected
in terms of measuring range, design and specic measuring
conditions.
Check the compatibility with the medium of the materials
subjected to pressure!
In order to guarantee the measuring accuracy and long-term
stability specied, the corresponding load limits must be
observed.
Only work on the gauge with the voltage disconnected.
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.
2.1 Intended use
The dierential pressure gauges of the DELTA-line product family are primarily
used for the monitoring and control of low dierential pressures where there are
high requirements in terms of one-sided overpressure and static pressure.
Typical markets for these products are the shipbuilding industry, process heating
technology, the heating, ventilation and air-conditioning industries, the water/
wastewater industry, and machine building and plant construction. For these, the
main function of the measuring instruments is the monitoring and control of lters,
compressors and pumps.
The instrument 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.

EN
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2.2 Personnel qualication
WARNING!
Risk of injury should qualication be 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 experi-
ence and knowledge of country-specic regulations, current standards and direc-
tives, are capable of carrying out the work described and independently recognis-
ing potential hazards.
2. Safety
2.3 Special hazards
WARNING!
For hazardous media such as oxygen, acetylene, ammable or
toxic gases or liquids, and refrigeration plants, compressors, etc.,
in addition to all standard regulations, the appropriate existing
codes or regulations must also be followed.
WARNING!
Residual media in dismounted measuring instruments can result in
a risk to persons, the environment and equipment.
Take sucient precautionary measures.
WARNING!
The maximum surface temperature of the instrument may not
exceed the ignition temperature of ammable media.
Take sucient precautionary measures.

EN
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2. Safety
2.4 Labelling, safety marks
Product label
Explanation of symbols
Before mounting and commissioning the instrument, ensure
you read the operating instructions!
CE, Communauté Européenne
Instruments bearing this mark comply with the relevant European
directives.
Risk of burns!
Potentially dangerous situation caused by hot surfaces.
Due to the maximum permissible process temperature of 90 °C,
measuring cells, adapters, valves or other attachment parts can
reach a temperature of 90 °C.
Date of
manufacture
Pin assignment
Type of
contact
Model 1)
1) E = single micro switch 850.3
D = double micro switch 850.3.3

EN
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3. Specications
3. Specications
The insulation values (air gaps and creepage distances) are sized for the
following ambient conditions per EN 61010-1:2010.
■
Altitude up to 2,000 m
■
Overvoltage category II
■
Pollution degree 2
■
Relative humidity 0 ... 95 % non-condensing (per DIN 40040)
The strength of the measuring instruments (enclosing, non-metallic components)
was tested with a reduced impact energy of 2 J corresponding to IK07 in
accordance with EN 61010-1:2010.The IK code is included on the respective
product label.
Specications DELTA-plus model DPG40 and DELTA-comb
model DPGS40
Nominal size Dierential pressure indication: Ø 100 mm
Working pressure indication: Ø 22 mm
Accuracy Dierential pressure indication: ≤ 2.5 % of span
(option ≤ 1.6 %)
Working pressure indication: ≤ 4 % of span
Scale ranges (EN 837) Dierential pressure: 0 ... 0.16 to 0 ... 10 bar for model DPG40
Dierential pressure: 0 ... 0.25 to 0 ... 10 bar for model DPGS40
Working pressure: 0 ... 25 bar
Max. working pres-
sure (stat.)
25 bar
Overpressure safety Either side max. 25 bar
Permissible
temperatures
Ambient: -10 ... +70 °C, medium: -10 ... +90 °C
Storage: -40 ... +70 °C
Ingress protection IP65 per EN/IEC 60529
Media chamber
(wetted)
Aluminium, EN AC–Al Si9Cu3(Fe), black lacquered
(option: Stainless steel)
Process connections
(wetted)
2 x G 1/4 female, lower mount (LM), in-line, centre distance
26 mm
Pressure elements
(wetted)
Dierential pressure: Compression springs from stainless steel
1.4310 and separating diaphragm from FPM/FKM (option: NBR)
Working pressure: Bourdon tube from Cu-alloy
Transmission parts
(wetted)
Stainless steel 1.4301, 1.4305, 1.4310, FPM/FKM
(option: NBR)
Sealings (wetted) FPM/FKM (option: NBR)
Movement Copper alloy

EN
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3. Specications
Specications DELTA-switch model DPS40
Case diameter 100 mm
Dierential pressure
measuring ranges
0 ... 0.25 to 0 ... 10 bar
Max. working
pressure (stat.)
25 bar
Overpressure safety Either side max. 25 bar
Permissible
temperature
Ambient: -10 ... +70 °C, medium: -10 ... +90 °C
Storage: -40 ... +70 °C
Ingress protection IP65 per EN/IEC 60529
Media chamber
(wetted)
Aluminium, EN AC–Al Si9Cu3(Fe), black lacquered
Process connections
(wetted)
2 x G 1/4 female, lower mount (LM), in-line, centre distance
26 mm
Pressure elements
(wetted)
Dierential pressure: Compression springs from stainless steel
1.4310 and separating diaphragm from FPM/FKM (option: NBR)
Transmission parts
(wetted)
Stainless steel 1.4301, 1.4305, 1.4310, FPM/FKM
(option: NBR)
Sealings (wetted) FPM/FKM (option: NBR)
Case Aluminium, EN AC–Al Si9Cu3(Fe), black lacquered
Window Plastic, with plug screw for switch point adjustment
Weight approx. 1.4 kg
Specications DELTA-plus model DPG40 and DELTA-comb
model DPGS40
Dial Dierential and working pressure indication: White dial, black
lettering
Pointer Dierential and working pressure indication: Blue pointer
Zero adjustment for
dierential pressure
indication
Via screw in the dial
Case Aluminium, EN AC–Al Si9Cu3(Fe), black lacquered
Window Plastic, plug screw for zero point adjustment; plug screw(s) for
switch point setting for model DPGS40
Weight approx. 1.3 kg

EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch10
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For further specications see the corresponding product label, WIKA data sheet
and the order documentation.
For models with optional explosion protection read the “Additional information
for hazardous areas (Ex i), models DPS40, DPGS40, DPGS40TA und DPGT40”,
article number 14110818.
Electrical contact
Type of contact Micro switch
Contact function
Single change-over
Double change-over
Contact type 850.3
Contact type 850.3.3
Load data
U max., I max., P max. AC 250 V, 5 A, 250 VA DC 30 V, 0.4 A, 10 W
Switch point setting from the outside at assistant scale by means of adjustment
screw(s)
Setting range from 10 % to 100 % of the full scale value
Switch point reproduc-
ibility
≤ 1.6 %
Switch hysteresis max. 5 % of the full scale value (option: max. 2.5 %)
Electrical connection Cable gland M20 x 1.5 with 1 m free cable

EN
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4. Design and function
4.1 Description
4. Design and function
DELTA-plus model DPG40
Pressures p1and p2 act on the media chambers ⊕ and ⊖, which are separated by
an elastic diaphragm (1).
The dierential pressure (∆p = p1- p2) leads to an axial deection of the
diaphragm against the measuring range springs (2).
The deection, which is proportional to the dierential pressure, is transmitted to
the movement (4) in the indicating case via a pressure-tight and low friction rocker
arm (3).
Overpressure safety is provided by metal bolsters (5) resting against the elastic
diaphragm.
14077369.01
⊖ ⊕






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4. Design and function
DELTA-comb model DPGS40
Pressures p1and p2 act on the media chambers ⊕ and ⊖, which are separated by
an elastic diaphragm (1).
The dierential pressure (∆p = p1- p2) leads to an axial deection of the dia-
phragm against the measuring range springs (2).
The deection, which is proportional to the dierential pressure, is transmitted
to the movement (4) in the indicating case and to the leaf springs of the micro
switches (5) via a pressure-tight and low friction rocker arm (3).
Overpressure safety is provided by metal bolsters (6) resting against the elastic
diaphragm.
The adjustment of the switch point is made by the adjustment screws accessible
from the front (7).The assistant scales (8) enable an accurate setting of the switch
points and indicate the current set point.
14077593.01
⊖ ⊕









EN
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14077608.01
⊖ ⊕







DELTA-switch model DPS40
Pressures p1and p2 act on the media chambers ⊕ and ⊖, which are separated
by an elastic diaphragm (1).
The dierential pressure (∆p = p1- p2) leads to an axial deection of the
diaphragm against the measuring range springs (2).
The deection, which is proportional to the dierential pressure, is transmitted to
the leaf springs of the micro switches (4) in the switch case via a pressure-tight
and low-friction rocker arm (3).
Overpressure safety is provided by metal bolsters (5) resting against the elastic
diaphragm.
The adjustment of the switch point is made by the adjustment screws accessi-
ble from the front (6).The assistant scales (7) enable an accurate setting of the
switch points and indicate the current set point.
4.2 Scope of delivery
Cross-check scope of delivery with delivery note.
4. Design and function

EN
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5. Transport, packaging and storage
5. Transport, packaging and storage
5.1 Transport
Check the dierential pressure gauge for any damage that may have been
caused by transport. Obvious damage must be reported immediately.
5.2 Packaging
Do not remove packaging until just before mounting.
Keep the packaging as it will provide optimum protection during transport (e.g.
change in installation site, sending for repair).
5.3 Storage
Permissible conditions at the place of storage
Storage temperature: -40 ... +70 °C
In order to prevent damage, the following points should be noted for the
storage of the pressure gauges:
■
Leave the pressure gauges in their original packaging
■
Following any possible removal of the measuring instruments, e.g. for testing,
the instrument should again be stored in its original packaging
Avoid exposure to the following factors:
■
Direct sunlight or proximity to hot objects
■
Mechanical vibration, mechanical shock (putting it down hard)
■
Soot, vapour, dust, humidity and corrosive gases
■
Potentially explosive environments, ammable atmosphere
WARNING!
Before storing the instrument, any residual media must be re-
moved.This is of particular importance if the medium is hazardous
to health, e.g. caustic, toxic, carcinogenic, radioactive, etc.

EN
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6. Commissioning, operation
6. Commissioning, operation
6.1 Mechanical connection
■
In accordance with the general technical regulations for pressure gauges (e.g.
EN 837-2 “Selection and installation recommendations for pressure gauges”).
■
Mounting of the pressure connections according to axed symbols, ⊕ high
pressure, ⊖ low pressure
■
Mounting by means of:
- rigid measuring line or
- wall mounting with available mounting links
■
Process connections 2 x G 1/4 female, lower mount (LM), in-line, centre
distance 26 mm, operating position NL 90 (nominal position) per DIN 16257
(i.e. vertical dial), design the threads of the pressure connection in accordance
with EN 837-3 (section 7.3.2).
■
Prior to the installation of the pressure gauge, clean the measuring lines
thoroughly by tapping and blowing or rinsing
■
Protect measuring instruments from contamination and high temperature
changes!
■
The pressure gauge must be mounted free from vibration and should be
aligned so that it is easy to read. It is recommended that an isolation device is
interposed between the pressure tapping point and the pressure gauge, which
will enable the replacement of the pressure gauge and a zero point check while
the plant is running.The instruments should be protected against coarse dirt
and wide uctuations in ambient temperature.
■
Correct sealing of the connections must be made using suitable at gaskets,
sealing rings or WIKA prole sealings. In order to orientate the gauge so that
the on-site display can be read as well as possible, a clamp socket or union nut
should be used. When screwing on and unscrewing the pressure gauges they
should not be gripped by the case, but rather only on the spanner ats of the
connection!

EN
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Wall mounting
Mounting using three integrally cast mounting lugs
Temperature load
WARNING!
In the nal application, it must be ensured that the instrument,
even with medium temperatures > 70 °C, is not heated to over
70 °C.
When mounting the pressure gauge, care should be taken
that the permissible operating temperature of the measuring
instrument is maintained, considering the eects of convection
and thermal radiation!
For this the pressure gauge and the shut-o valve must be
protected by suciently long measuring lines or syphons.
The inuence of temperature on the indication and measuring
accuracy must be observed.
The eective maximum surface temperature is not only
dependant upon these instruments, but mainly on the respective
medium temperature! With gaseous substances, the temperature
may increase as a result of compression warming.
In these cases it may be necessary to throttle the rate of change
of pressure or reduce the permissible medium temperature.
6. Commissioning, operation

EN
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Measuring assemblies
Proven measuring assemblies for various types of media.The assemblies that are
particularly recommended for use are shown below.
6. Commissioning, operation
14077751.01
Dimensions in mm
DELTA-plus model DPG40
Liquid media Gaseous media
Filling of the
measuring
line
liquid liquid
with
vapour
complete-
ly vapour-
ised
gaseous partially
condensed
(damp)
complete-
ly con-
densed
Examples conden-
sate
boiling
liquids
“liquid gases” dry air moist air
ue gases
steam
Pressure
gauge above
the tapping
point
Pressure
gauge below
the tapping
point

EN
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6. Commissioning, operation
DELTA-comb model DPGS40
Cable gland M20 x 1.5
with 1 m cable
14078112.01
DELTA-switch model DPS40
14078260.01
Cable gland M20 x 1.5
with 1 m cable

EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch 19
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Measuring assemblies
The preferred measuring assemblies for various possible applications are
specied in DIN 19216.
The following schematic diagram shows a recommended assembly for liquid
media. As throttling devices, dierential pressure transducers should be provided
in accordance with DIN 1952 (issue 07.82), now replaced by EN 5167/1.
The dierential pressure lines must be made from metal, their bore must not
be less than 4 mm and the eective length between the valve manifold and the
dierential pressure gauge must be at least 500 mm.
Dierential pressure
transducer
(throttling device in the
process line)
Dierential pressure
instrument
(DELTA-plus,
DELTA-comb or
DELTA-switch)
Shut-o valves
(valve manifold)
Dierential pressure
line
6. Commissioning, operation
In addition, the length and the bore of
the pressure lines should be such that,
with cold lines, the response time of
the pressure gauge is not more than
5 seconds.
The connections of the dierential
pressure lines must be welded, brazed or
screwed using metal sealing elements.
Shut-o valves in dierential pressure
lines must only be operated using tools.
6.2 Electrical connection
(applies to models DELTA-comb and DELTA-switch)
■
The electrical connection must only be made by qualied skilled personnel.
■
Connection details and switching functions are given on the product label.
Connection terminals and ground terminal are appropriately marked.
■
The mains connection lines to be provided must be dimensioned for maximum
instrument current supply and comply with IEC 227 or IEC 245.
■
The instruments must be connected to the equipotential bonding of the plant.
Performance data (see chapter 3 “Specications”)

EN
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6. Commissioning, operation
Safety instructions for installation
■
Follow the installation and safety instructions within the
operating instructions.
■
Install instruments in accordance with the manufacturer's
instructions and the valid standards and regulations.
■
The instruments do not provide for incorporated overcurrent protectors!
■
In order to prevent the contacts from welding through overload, suitable
protection systems must be implemented by the operator!
■
Only connect circuits with the same voltage and type of protection to the
switch contacts and connecting cables.
■
Limit the maximum current, using external measures, to a value of AC 250 V,
5 A, with resistive load, per circuit.
■
Size the connecting cables for the largest current strength in the circuits.
Example, pin assignment 1:
■
Cable gland and cable
1st
contact 2nd contact 2nd contact
1st contact
Cable terminal box
Information
For the safety circuit, which will switch o the heating if the
steam generator falls below the minimum ow, only the normally
open contact of the changeover switch should be connected (i.e.
with Δp = 0 open circuit)!
Example, pin assignment 2:
■
Cable socket or angular connector
per DIN 43651
The exact information for the pin assignment and the required power supply
are stated on the product label on the case circumference. Examples of pin
assignments are shown below.