WIKA DPG40 User manual

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

EN
DE
2
14532078.01 12/2021 EN/DE
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch
© 03/2014 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, DELTA-Line,
models DPG40, DPGS40 and DPS40 Page 3 - 28
Betriebsanleitung DELTA-Line,
Typen DPG40, DPGS40 und DPS40 Seite 29 - 53

EN
Contents
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch 3
14532078.01 12/2021 EN/DE
Contents
Declarations of conformity can be found online at www.wika.com.
1. General information 4
2. Safety 5
2.1 Explanation of symbols........................................5
2.2 Intended use ................................................5
2.3 Personnel qualification ........................................6
2.4 Special hazards ..............................................6
2.5 Labelling, safety marks ........................................7
3. Specifications 9
4. Design and function 12
4.1 Description.................................................12
5. Transport, packaging and storage 15
6. Commissioning, operation 16
6.1 Mechanical connection .......................................16
6.2 Electrical connection.........................................22
7. Options and accessories 25
7.1 Four-way valve manifold ......................................25
7.2 Panel mounting flange........................................26
8. Maintenance 27
9. Dismounting, return and disposal 27
9.1 Dismounting................................................27
9.2 Return.....................................................27
9.3 Disposal ...................................................27
Annex: EU declarations of conformity 57

EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch4
14532078.01 12/2021 EN/DE
1. General information
■
The instrument described in the operating instructions has been designed and
manufactured using state-of-the-art technology. All components are subject
to stringent quality and environmental criteria during production. Our manage-
ment 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 inst-
ructions 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 inst-
ructions 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 unautho-
rised 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
Model Data sheet Additional operating instructions for Ex version
DPG40 PM 07.20 14525200
DPS40 PV 27.21 14110818
DPGS40 PV 27.20 14110818
1. General information
Supplementary documentation:
▶Please follow all the documentation included within the scope of delivery.
With versions for hazardous areas, also follow the additional
operating instructions!

EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch 5
14532078.01 12/2021 EN/DE
2. Safety
2. Safety
2.1 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 effici-
ent and trouble-free operation.
WARNING!
... indicates a potentially dangerous situation that can result in burns,
caused by hot surfaces or liquids, if not avoided.
2.2 Intended use
WARNING!
Before installation, commissioning and operation, ensure that the
appropriate dierential pressure gauge has been selected in terms
of design and specic measuring conditions.
■
Check the compatibility with the medium of the materials subjec-
ted to pressure!
■
In order to guarantee the measurement accuracy and service life
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
property.
Further important safety instructions can be found in the individual
chapters of these operating instructions.
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 overload 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.

EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch6
14532078.01 12/2021 EN/DE
Classication per European pressure equipment directive
■
Instrument type: Pressure accessory without safety function
■
Media: Liquid or gaseous, group 1 (hazardous)
■
For maximum allowable pressure PS, see chapter 2.5 “Labelling / safety
marks”
■
Volume: < 0.1 l
The instrument must only be used with media which are not harmful to the wetted
parts over the entire operating range of the instrument. Any change in the state of
the matter or any decomposition of unstable media is not permitted.
Only use the instrument in applications that lie within its technical performance
limits (e.g. max. ambient temperature, material compatibility, ...).
→ For performance limits, see chapter 3 “Specications”.
The manufacturer shall not be liable for claims of any type based on operation
contrary to the intended use.
2.3 Personnel qualification
WARNING!
Risk of injury should qualication be insucient!
Improper handling can result in considerable injury and damage to
property.
▶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, authorised by the operator, are understood to be personnel
who, based on their technical training, knowledge of measurement and control
technology and on their experience and knowledge of country-specic regu-
lations, current standards and directives, are capable of carrying out the work
described and independently recognising potential hazards.
2.4 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.
2. Safety

EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch 7
14532078.01 12/2021 EN/DE
2. Safety
WARNING!
Residual media in dismounted measuring instruments can result in
a risk to persons, the environment and equipment.
Take sucient precautionary measures.
2.5 Labelling, safety marks
Product label (only models DPS40 and DPGS40)
Dial (examples)
Model Pin assignment
Code: E = Single microswitch 850.3
D = Double microswitch 850.3.3
Contact model
Date of manufacture Article number
Maximum allowable pressure PS per European
pressure equipment directive
 






EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch8
14532078.01 12/2021 EN/DE
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.
2. Safety

EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch 9
14532078.01 12/2021 EN/DE
3. Specications
3. Specifications
The insulation values (air gaps and creepage distances) are sized for the fol-
lowing ambient conditions in accordance with 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-metal components)
was tested with a reduced impact energy of 2 J corresponding to IK07 in ac-
cordance 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 pressure (stat.) 25 bar
Overload safety Max. 25 bar
On one, both and alternatingly on the ⊕ and ⊖ sides
Permissible temperatures Ambient: -10 ... +70 °C, medium: -10 ... +90 °C
Storage: -40 ... +70 °C
Ingress protection IP65 per IEC/EN 60529
Measuring chamber (wetted) Aluminium, EN AC–Al Si9Cu3(Fe), black painted
(option: stainless steel)
Process connections (wetted) 2 x G 1/4 female thread, lower mount, 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)

EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch10
14532078.01 12/2021 EN/DE
3. Specications
Specications DELTA-switch, model DPS40
Case diameter 100 mm
Dierential pressure measu-
ring ranges
0 ... 0.25 to 0 ... 10 bar
Max. working pressure (stat.) 25 bar
Overload safety either side max. 25 bar
Permissible temperature Ambient: -10 ... +70 °C, medium: -10 ... +90 °C
Storage: -40 ... +70 °C
Ingress protection IP65 per IEC/EN 60529
Measuring chamber (wetted) Aluminium, EN AC–Al Si9Cu3(Fe), black painted
(option: stainless steel)
Process connections (wetted) 2 x G 1/4 female thread, lower mount, 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)
Indicator case Aluminium, EN AC–Al Si9Cu3(Fe), black painted
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
Sealings (wetted) FPM/FKM (option: NBR)
Movement Copper alloy
Dial Dierential and working pressure indication: White
dial, black lettering
Pointer Dierential and working pressure indication: Blue
pointer
Zero point setting for
dierential pressure
indication
via screw in the dial
Indicator case Aluminium, EN AC–Al Si9Cu3(Fe), black painted
Window Plastic, plug screw for zero point correction; 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-switch 11
14532078.01 12/2021 EN/DE
For further specications, see the corresponding product label, WIKA data sheet
and order documentation
For models with optional explosion protection, read “Additional operating inst-
ructions for hazardous areas (Ex i), models DPS40, DPGS40, DPGS40TA and
DPGT40”, article number 14110818.
For model DPG40 with optional explosion protection, read the additional operating
instructions with article number 1425200.
3. Specications
Electrical contact
Type of contact Microswitch
Contact function
Single change-over contact
Double change-over contact
Contact model 850.3
Contact model 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 reproducibility ≤ 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
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch12
14532078.01 12/2021 EN/DE
4. Design and function
4.1 Description
4. Design and function
DELTA-plus model DPG40
The display case (1) is connected directly with the measuring chamber (2) and
the process connections integrated in it.
Pressures p1 and p2 act on the media chambers ⊕ and ⊖, which are separated
by an elastic diaphragm (3).
The dierential pressure (∆p = p1 - p2) leads to an axial deection of the
diaphragm against the measuring range springs (4).
The deection, which is proportional to the dierential pressure, is transmitted to
the movement (7) in the display case via a pressure-tight and low-friction rocker
arm (6).
Overload safety is provided by metal bolsters (5) resting against the elastic
diaphragm.
14077369.01
⊖





 
⊕

EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch 13
14532078.01 12/2021 EN/DE
4. Design and function
DELTA-comb model DPGS40
Pressures p1 and 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 indicator case and to the leaf springs of the microswit-
ches (5) via a pressure-tight and low friction rocker arm (3).
Overload 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) simplify the setting of the switch point.
14077593.01
⊖ ⊕









EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch14
14532078.01 12/2021 EN/DE
14077608.01
⊖ ⊕







DELTA-switch model DPS40
Pressures p1 and 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 leaf springs of the microswitches (4) in the switch enclosure via a pressure-
tight and low-friction rocker arm (3).
Overload safety is provided by metal bolsters (5) resting against the elastic
diaphragm.
The adjustment of the switch point is made by the adjustment screws accessible
from the front (6).The assistant scales (7) simplify the setting of the switch point.
4.2 Scope of delivery
Cross-check scope of delivery with delivery note.
4. Design and function

EN
5. Transport, packaging and storage
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch 15
14532078.01 12/2021 EN/DE
5. Transport, packaging and storage
5.1 Transport
Check the instrument 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 instruments:
■
Leave the instruments 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
■
Hazardous environment, ammable atmosphere
WARNING!
Before storing the instrument, any residual media must be remo-
ved.This is of particular importance if the medium is hazardous to
health, e.g. caustic, toxic, carcinogenic, radioactive, etc.

EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch16
14532078.01 12/2021 EN/DE
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 thread, lower mount, in-line, centre
distance 26 mm, operating position NL 90 (nominal position) per DIN 16257
(i.e. vertical dial), design the threads of the connection shanks preferably in
accordance with EN 837-3 (section 7.3.2).
■
Prior to the installation of the instrument, clean the measuring lines thoroughly
by tapping and blowing or ushing.
■
Protect measuring instruments from contamination and high temperature
uctuations!
■
The instrument must be mounted free from vibration and should be aligned
so that it is easy to read. It is recommended that a shut-o device is placed
between the pressure tapping and the instrument, which will enable the repla-
cement of the instrument and a zero point check while the plant is running.The
instruments should be protected against coarse dirt and wide uctuations in
ambient temperature.
■
For sealing the connections, use at gaskets, lens-type sealing rings or WIKA
prole sealings. In order to orientate the instrument so that the local indication
can be read as well as possible, a connection with LH-RH adjusting nut or
union nut should be used. When screwing on and unscrewing the instruments
they should not be gripped by the case, but rather only on the spanner ats of
the connecting nozzle!

EN
6. Commissioning, operation
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch 17
14532078.01 12/2021 EN/DE
Wall mounting
Mounting using three integrally cast mounting lugs
Temperature load
WARNING!
In the end application, it must be ensured that the instrument, even
with medium temperatures > 70 °C, is not heated to over 70 °C.
When mounting the instrument, care should be taken that the
permissible operating temperature of the measuring instrument
is maintained, considering the eects of convection and thermal
radiation!
Thus the instrument and the shut-o device must be protected by
suciently long measuring lines or syphons.
The temperature eect on the indication and measurement accura-
cy must be observed.
The eective maximum surface temperature is not only dependent
upon these instruments, but mainly on the respective medium tem-
perature! 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.

EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch18
14532078.01 12/2021 EN/DE
Measuring assemblies
Proven measuring assemblies for various types of media.The assemblies that
are particularly recommended for use are shown below.
6. Commissioning, operation
Liquid media Gaseous media
Filling of the
measuring
line
liquid liquid
with
vapour
com-
pletely
vapou-
rised
gase-
ous
partially
condensed
(damp)
comple-
tely con-
densed
Examples Conden-
sate
boiling
liquids
“Liquid
gases”
dry air moist air
Flue gases
Steam
Pressure
gauge
above the
tapping
point
Pressure
gauge
below the
tapping
point

EN
6. Commissioning, operation
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch 19
14532078.01 12/2021 EN/DE
120
4 6
100
26
15
13
14
G1/4
4.4
27
20,5
22
30
114-117
14077751.01
Dimensions in mm
DELTA-plus, model DPG40 with aluminium measuring chamber
DELTA-plus, model DPG40 with stainless steel measuring chamber
125
4 5,5
100
1526
13
15
20,5
G1/4
56
132
30
45
30
4,8
116
14412474.01

EN
WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch20
14532078.01 12/2021 EN/DE
DELTA-comb, model DPGS40 with aluminium measuring chamber
Cable gland M20 x 1.5
with 1 m cable
14078112.0114413389.01
4.4
100
4 34
120
6
15
26
20,5
G1/4
13
14
22
27
114-117
30
100
4 5,5
15
26
20,5
G1/4
13
15
4,8
125
56
116
30
45
30
DELTA-comb, model DPGS40 with stainless steel measuring chamber
Cable gland M20 x 1.5
with 1 m cable
6. Commissioning, operation