GEM 3140 X Series User manual

GEMÜ 3140 ... X
Pressure transducer for potentially explosive areas
Operating instructions
EN
further information
webcode: GW-3140

All rights including copyrights or industrial property rights are expressly reserved.
Keep the document for future reference.
© GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG
15.05.2019
www.gemu-group.com2 / 20GEMÜ 3140 ... X

Contents
1 General information ................................................... 4
1.1 Information ......................................................... 4
1.2 Symbols used ..................................................... 4
1.3 Warning notes .................................................... 4
2 Safety information .................................................... 4
3 Product description ................................................... 5
3.1 Construction ....................................................... 5
3.2 Description ......................................................... 5
3.3 Function .............................................................. 5
3.4 Product label ...................................................... 5
4 Correct use ................................................................ 6
5 Order data ................................................................. 7
6 Technical data ........................................................... 8
7 Dimensions ............................................................... 10
8 Manufacturer's information ....................................... 11
8.1 Delivery ............................................................... 11
8.2 Transport ............................................................ 11
8.3 Storage ............................................................... 11
9 Installation in piping .................................................. 11
9.1 Installation and safety information ................... 11
9.2 Installing outdoors and in damp conditions ..... 12
9.3 Installation steps for connections in accord-
ance with DIN 3852 ............................................ 12
9.4 Installation steps for connections in accord-
ance with EN 837 ................................................ 12
10 Electrical connection ................................................. 13
10.1 Connection and safety information ................... 13
10.2 Conditions for hazardous locations .................. 13
10.3 2-wire system (output code 4A, 4AS, 4AX,
4AXS) .................................................................. 14
10.3.1 Electrical connection ............................. 15
11 Commissioning ......................................................... 15
12 Error clearance .......................................................... 16
13 Inspection/servicing .................................................. 17
14 Disposal .................................................................... 17
15 Returns ..................................................................... 17
16 Declaration of conformity according to 2014/30/EU
(EMC Directive) ......................................................... 18
17 Declaration of conformity in accordance with
2014/34/EU (ATEX) ................................................... 19
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1 General information
1 General information
1.1 Information
– The descriptions and instructions apply to the stand-
ard versions. For special versions not described in this
document the basic information contained herein ap-
plies in combination with any additional special docu-
mentation.
– Correct installation, operation, maintenance and repair
work ensure faultless operation of the product.
– Should there be any doubts or misunderstandings, the
German version is the authoritative document.
– Contact us at the address on the last page for staff
training information.
1.2 Symbols used
The following symbols are used in this document:
Symbol Meaning
Tasks to be performed
Response(s) to tasks
– Lists
1.3 Warning notes
Wherever possible, warning notes are organised according to
the following scheme:
SIGNAL WORD
Type and source of the danger
Possible
symbol for
the specific
danger
Possible consequences of non-observance.
Measures for avoiding danger.
Warning notes are always marked with a signal word and
sometimes also with a symbol for the specific danger.
The following signal words and danger levels are used:
DANGER
Imminent danger!
▶Non-observance can cause death or
severe injury.
WARNING
Potentially dangerous situation!
▶Non-observance can cause death or
severe injury.
CAUTION
Potentially dangerous situation!
▶Non-observance can cause moderate
to light injury.
NOTICE
Potentially dangerous situation!
▶Non-observance can cause damage to
property.
The following symbols for the specific dangers can be used
within a warning note:
Symbol Meaning
Danger – high voltage
Danger from potentially explosive atmosphere
2 Safety information
The safety information in this document refers only to an in-
dividual product. Potentially dangerous conditions can arise
in combination with other plant components, which need to
be considered on the basis of a risk analysis. The operator is
responsible for the production of the risk analysis and for
compliance with the resulting precautionary measures and
regional safety regulations.
The document contains fundamental safety information that
must be observed during commissioning, operation and
maintenance. Non-compliance with these instructions may
cause:
– Personal hazard due to electrical, mechanical and
chemical effects.
– Hazard to nearby equipment.
– Failure of important functions.
– Hazard to the environment due to the leakage of dan-
gerous materials.
The safety information does not take into account:
– Unexpected incidents and events, which may occur
during installation, operation and maintenance.
– Local safety regulations which must be adhered to by
the operator and by any additional installation person-
nel.
Prior to commissioning:
1. Transport and store the product correctly.
2. Do not paint the bolts and plastic parts of the product.
3. Carry out installation and commissioning using trained
personnel.
4. Provide adequate training for installation and operating
personnel.
5. Ensure that the contents of the document have been fully
understood by the responsible personnel.
6. Define the areas of responsibility.
7. Observe the safety data sheets.
8. Observe the safety regulations for the media used.

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During operation:
9. Keep this document available at the place of use.
10. Observe the safety information.
11. Operate the product in accordance with this document.
12. Operate the product in accordance with the specifica-
tions.
13. Maintain the product correctly.
14. Do not carry out any maintenance work and repairs not
described in this document without consulting the manu-
facturer first.
In cases of uncertainty:
15. Consult the nearest GEMÜ sales office.
3 Product description
3.1 Construction
Pressure transducer
2
1
3b
3a
Item Name Materials
1* Pressure connection 1.4404 stainless steel or
PVDF
2Housing 1.4404 Stainless steel
3a Type A connector PA
3b M12x1 plug 1.4404 Stainless steel
Seals* FPM or EPDM
Isolating diaphragm* Ceramic Al2O3 (96%)
* Media wetted
3.2 Description
The GEMÜ 3140 … X pressure transducer/switch is ideal for
precise measurements in a wide pressure range. The sensor
is suitable for use with both highly viscous and contaminated
media and is also suitable for corrosive media due to its
high-quality material selection. A variety of electrical and
mechanical connections are available, depending on the ver-
sion.
3.3 Function
The GEMÜ 3140 … X pressure transducer converts the phys-
ical variable pressure into an electrical signal.
3.4 Product label
GEMÜ Gebr. Müller Apparatebau GmbH& Co. KG
Fritz-Müller-Straße 6-8
74653 Ingelfingen-Criesbach
SN: 10306608
GeMü BestNr XGEMÜ 3140 ... X
Eingang: -1...40 bar rel.
Ausgang: 4...20 mA/2-Leiter
Versorgung: 10...28 VDC
IBExU 18ATEXxxxxX
II 1G Ex ia IIB T4 Gb II 2D Ex ia IIIC T 85°C Db
PIN-Belegung:
Ub+: 2
Ub-: 3 Schirm:
Ui: 28 VDC; li: 93 mA; Pi: 660 mW
Ci: 0 nF; Li: 0 μF; Cgnd: 27 nF
0637
2018
Serial
number
Order code
Product
type
Signal
Connection assignment
ATEX characteristics
3 Product description

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4 Correct use
4 Correct use
DANGER
Danger of explosion
▶Danger of death or severe injury.
●Only use the product in potentially ex-
plosive zones confirmed in the declar-
ation of conformity.
WARNING
Improper use of the product!
▶Risk of severe injury or death.
▶Manufacturer liability and guarantee will be void.
●Only use the product in accordance with the operating
conditions specified in the contract documentation and
this document.
The product is designed for converting the physical variable
pressure into an electrical signal.
The pressure transducers are designed exclusively for meas-
uring gauge pressures, vacuums and absolute pressures.
The screw-in probes are designed exclusively for measuring
levels and processes.
Suitable measurement media are gases or liquids that are
compatible with the media wetted materials described in the
technical data. It is also important to ensure that the medium
to be used for the application is compatible with the media
wetted parts.
With the order option special version X, the product is inten-
ded for use in potentially explosive areas of zones 0, 1 and 2
with gases, mists or vapours and zones 20, 21 and 22 with
combustible dusts in accordance with EU directive 2014/34/
EU (ATEX).
The product has the following explosion protection marking
in relation to the housing material:
Housing material stainless steel (code 7):
Gas: II 1G Ex ia IIC T4 Ga
Dust: II 1D Ex ia IIIC T 85 °C Da
Housing material PVDF (code 20):
Gas: II 2G Ex ia IIC T4 Gb
Dust: II 2D Ex ia IIIC T 85 °C Db
EC type examination certificate: IBExU08ATEX1125 X
Notified body: IBEXu, No. 0637
The product has been developed in compliance with the fol-
lowing harmonised standards:
– DIN EN 60079-0
– DIN EN 60079-11
– DIN EN 60079-26
For use in potentially explosive areas, the following
conditions or operation limits must be observed:
1. The devices with a plug version are to be set up so that
they remain in the IP degree of protection IP 20 at all
times.
2. The safety and assembly information contained in the op-
erating instructions and the ambient temperature ranges
of -20 °C ≤ Ta ≤ +70 °C or for the types 3140 … X from -20
°C ≤ Ta ≤ +65 °C must be followed.
3. The device may only be operated in potentially explosive
atmospheres which require operating media of category 1
if atmospheric conditions are present (temperature from
-20 °C to +60 °C, pressure of 0.8 bar to 1.1 bar).
Use of the product is permissible in the following ambient
temperature ranges:
ATEX
version:
-20 to 60 °C (zone 0: patm 0.8 to 1.1 bar)
-20 to 70 °C (from zone 1 onwards)
GEMÜ shall accept no liability in the event that the wrong
choice is made, nor shall it accept liability for the con-
sequences thereof.

5 Order data
The order data provide an overview of standard configurations.
Please check the availability before ordering. Other configurations available on request.
Order codes
1 Type Code
Pressure transducer 3140
2 Connection size Code
G 1/2 G12
G 1/4 G14
3 Type of measurement Code
Absolute pressure A
Relative pressure R
4 Measuring range Code
Measuring range 0 - 6 bar 6
Measuring range 0 - 10 bar 10
Measuring range 0 - 40 bar 40
5 Material Code
1.4404 7
PVDF 20
6 Seal material Code
FPM 4
EPDM 14
7 Electrical connection Code
Type A connector A
M12 x 1 plug, 4-pin M
8 Voltage/Frequency Code
24 V DC C1
9 Display Code
Without 0
10 Output Code
4 to 20 mA/2-wire Ex design 4AX
4 to 20 mA/2-wire Ex + SIL2 design 4AXS
11 Special version Code
Standard
ATEX (2014/34/EU) X
Order example
Order option Code Description
1 Type 3140 Pressure transducer
2 Connection size G12 G 1/2
3 Type of measurement A Absolute pressure
4 Measuring range 10 Measuring range 0 - 10 bar
5 Material 7 1.4404
6 Seal material 4 FPM
7 Electrical connection A Type A connector
8 Voltage/Frequency C1 24 V DC
9 Display 0 Without
10 Output 4AX 4 to 20 mA/2-wire Ex design
11 Special version X ATEX (2014/34/EU)
5 Order data
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6 Technical data
6.1 Temperature
Media temperature: Stainless steel (code 7): -40 to 125 °C
PVDF (code 20): -30 to 125 °C
Ambient temperature: Stainless steel (code 7): -40 to 85 °C
PVDF (code 20): -30 to 85 °C
ATEX version: -20 to 60 °C (zone 0: patm 0.8 to 1.1 bar)
-20 to 70 °C (from zone 1 onwards)
Storage temperature: Stainless steel (code 7): -40 to 100 °C
PVDF (code 20): -30 to 100 °C
6.2 Pressure
Operating pressure: Stainless steel (code 7): max. 60 bar
PVDF (code 20): max. 60 bar (G 1/2)
max. 25 bar (G 1/4)
6.3 Product compliance
EMC Directive: 2014/30/EU
Explosion protection: Special version X order code
ATEX marking: Housing material stainless steel (code 7):
Gas: II 1G Ex ia IIC T4 Ga
Dust: II 1D Ex ia IIIC T 85 °C Da
Housing material PVDF (code 20):
Gas: II 2G Ex ia IIC T4 Gb
Dust: II 2D Ex ia IIIC T 85 °C Db
EC type examination certificate: IBExU08ATEX1125 X
Notified body: IBEXu, No. 0637
SIL: SIL2 (IEC 61508/IEC 61511)
only for order code Display (code 0) and Output (code 4AS or 4AXS)
UL approval: Yes
only for order code Display (code 0)
6.4 Mechanical data
Installation position: any
Protection class: IP 67 acc. to EN 60529
Weight: Pressure switch without display: 220 g
Lifetime: > 100 x 106 load cycles
Switch-on time: 110 ms
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GEMÜ 3140 ... X
6 Technical data

6.5 Electrical data
6.5.1 Power supply standard
Supply voltage: 24 V DC (-5/+10%)
Current consumption: ≤ 40 mA
Reverse battery
protection:
Yes
Duty cycle: Continuous duty
Electrical connection
type:
M12 connector, 4-pin
Plug design A, DIN EN 175301-803
6.5.2 Power supply ATEX
Ui:28 V DC
li:93 mA
Pi : 660 mW
Ci : Negligible
Li : Negligible
Information: Plus line inductances 1 µH/m and line capacities 160 pF/m (for factory cable)
The supply connections have an inner capacity of max. 27 nF against the housing.
6.5.3 Switching output
Supply voltage: 18 - 30 V DC
Output signal: Output
code
Output signal 1 Output signal 2
Code 4AX 4 to 20 mA -
Code 4AXS 4 to 20 mA -
Load resistor: Rmin ≥ 10 kΩ
Rmax ≤ 330 Ω
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6 Technical data

7 Dimensions
G 1/2 G 1/4
~33
Ø34,5
Ø26,5
SW27
5017
14
33
12
14
10,5
G 1/2
Ø26,5
SW27
5017
14
M12x1
12
Ø34,5
Type A connector (code A) M12 x 1 plug
4-pin (code M)
Dimensions in mm
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GEMÜ 3140 ... X
7 Dimensions

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8 Manufacturer's information
8.1 Delivery
● Check that all parts are present and check for any dam-
age immediately upon receipt.
The product's performance is tested at the factory. The
scope of delivery is apparent from the dispatch documents
and the design from the order number.
8.2 Transport
1. Only transport the product by suitable means. Do not
drop. Handle carefully.
2. After the installation dispose of transport packing mater-
ial according to relevant local or national disposal regula-
tions / environmental protection laws.
8.3 Storage
1. Store the product free from dust and moisture in its ori-
ginal packaging.
2. Avoid UV rays and direct sunlight.
3. Do not exceed the maximum storage temperature (see
chapter "Technical data").
4. Do not store solvents, chemicals, acids, fuels or similar
fluids in the same room as GEMÜ products and their
spare parts.
9 Installation in piping
9.1 Installation and safety information
DANGER
Danger of explosion!
▶Risk of death or severe injury.
●Only install the product when it is de-
pressurized and de-energized.
●Do not install the product if there is a
danger of explosion.
●Due to supercharging processes in
conjunction with freely suspended
submersible measuring transducers
with FEP cable.
●FEP cable fixed in place.
DANGER
Risk of lightning strike!
▶If there is an elevated risk of the
device being damaged by lightning or
overvoltage, an effective lightning pro-
tection system must additionally be
put in place.
DANGER
Use of the product as a stepladder
▶The housings are not designed to be used as a steplad-
der for climbing in the plant. They can be damaged if
used in this way and their function impaired. If the hous-
ing is damaged, water, dirt and combustible material can
accumulate in the housing interior. This can cause a
short-circuit. Furthermore, the deposits can cause the
device to overheat and may result in an explosion.
NOTICE
▶All interconnected components must be intrinsically
safe. The operator is responsible for ensuring that the
entire system (the entire circuit) is intrinsically safe.
NOTICE
▶Handle the unprotected diaphragm with extreme care, as
it is very easily damaged.
NOTICE
▶For use in steam pipes, provide a cooling zone.
NOTICE
▶During installation, avoid high mechanical stresses on
the pressure connection. This can result in the charac-
teristic shifting or in damage, particularly for very narrow
pressure ranges and for devices with a plastic pressure
connection.
NOTICE
▶With hydraulic systems, orientate the device such that
the pressure connection is facing upwards. (Vent hole)
9 Installation in piping

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9 Installation in piping
NOTICE
▶If the device is to be installed with the pressure connec-
tion at the top, make sure that no liquid flows away along
the housing as this could result in moisture and dirt
blocking the gauge reference in the housing and, in turn,
to the equipment malfunctioning. Where necessary, re-
move dust and dirt from the edge of the electrical con-
nection's union.
NOTICE
▶Make sure that you do not remove the packaging and
protection caps from the device until you are just about
to install it, so that you do not damage the diaphragm or
the threads.
▶Keep the protection caps. Dispose of packaging properly.
9.2 Installing outdoors and in damp conditions
1. Electrically connect the device as soon as it is installed, or
take measures to prevent the ingress of moisture, e.g. us-
ing a suitable protection cap. (The stated protection class
applies to the device once it is connected.)
2. When installing the device, position it such that splashed
water and condensation can drain away. Liquid must not
be allowed to accumulate on sealing surfaces.
3. For devices with a cable outlet, the outgoing cable must
be routed downwards. If the cable has to be routed up-
wards, this must be implemented in an elbow that is dir-
ected downwards.
4. Install the device such that it is protected from direct
sunlight. In the worst case scenario, exposure to direct
sunlight can result in the permissible operating temperat-
ure being exceeded. This must be completely avoided
when using the device in Ex areas.
5. Install devices with a gauge reference in the housing
(small hole next to the electrical connection) such that
the gauge reference needed for the measurement is pro-
tected from dirt and moisture. If the measuring trans-
ducer is exposed to liquid, the gauge reference will be-
come blocked, preventing the air pressure from equaliz-
ing. It is not possible to measure accurately in this situ-
ation, and the measuring transducer may be damaged as
a result.
9.3 Installation steps for connections in accordance
with DIN 3852
NOTICE
▶Do not use any additional sealing material such as
oakum, hemp or Teflon tape.
The O-ring must sit in the groove provided.
The O-ring is not damaged.
The sealing surface of the part that accommodates it must
be free of defects. (RZ 3.2)
1. Screw the device onto the mounting thread by hand.
2. Devices with a knurled collar must be screwed on tightly
by hand
3. Devices with a wrench surface must be tightened with a
suitable open-end wrench.
Steel wrench surface:
G1/4": Approx. 5 Nm
G1/2": Approx. 10 Nm
Plastic wrench surface:
Max. 3 Nm
9.4 Installation steps for connections in accordance
with EN 837
A suitable seal that is compatible with the measurement me-
dium and the pressure that is to be measured must be
provided (e.g. a copper gasket).
The sealing surface of the part that accommodates it must
be free of defects (RZ 6.3).
1. Screw the device onto the mounting thread by hand.
2. Then tighten it with the open-end wrench:
G1/4": Approx. 20 Nm
G1/2": Approx. 50 Nm
NOTICE
▶Observe the permissible pressures in accordance with
EN 837
G1/4" EN 837 PN ≤ 600 bar The counterpart
must be made from
steel in accordance
with DIN 17440
with a strength of
Rp0.2 ≥ 190 N/mm2.
G1/2" EN 837 PN ≤ 1000 bar
G1/4" EN 837 PN > 600 bar,
PN ≤ 1000 bar
The counterpart
must be made from
steel in accordance
with DIN 17440
with a strength of
Rp0.2 ≥ 260 N/mm2.
G1/2" EN 837 PN > 1000 bar,
PN ≤ 1600 bar

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10 Electrical connection
10.1 Connection and safety information
Devices with cable glands and cable sockets
1. Ensure that the outside diameter of the cable used is
within the permissible clamping range (cable gland M12 x
1.5 cable dia. 3–6.5 mm, cable socket ISO 4400 cable dia.
4.5–10 mm). In addition, make sure that the cable is
seated securely in the cable gland, without any gaps.
2. Use a shielded, twisted multicore cable for the electrical
connection.
Devices with a cable outlet
Comply with the following minimum bend radii when laying
the cable:
– Cable without air hose:
Fixed in place: 5 x cable diameter
Flexible use: 10 x cable diameter
– Cable with air hose:
Fixed in place: 10 x cable diameter
Flexible use: 20 x cable diameter
On devices with a cable outlet and integrated vent tube, the
PTFE filter on the cable end on the gauge tube must not be
damaged or removed.
NOTICE
▶Cables used for gauge devices have a vent tube for
equalizing the pressure. Route the cable end into an area
or suitable terminal box that is as free from moisture and
corrosive gases as possible in order to prevent damage.
10.2 Conditions for hazardous locations
Hazard due to electro-static build-up
DANGER
Danger of explosion!
▶Risk of death or severe injury.
●Danger of explosion due to sparking
as a result of electro-static build-up in
plastic parts.
●On devices with a cable outlet, the
connection cable must be fixed in
place.
●Do not use a dry cleaning method to
clean the device and, if applicable, the
connection cable; use a damp cloth,
for example.
●Danger of explosion if operating
voltage is too high (max. 28 VDC) and if
the field housing is opened during op-
eration.
●Only install the device when it is de-
pressurized and de-energized.
●Do not install the device if there is a
danger of explosion.
●Always operate the device within its
specifications. (Technical data)
●The field housing must not be opened
if there is a danger of explosion.
The following warning sign is affixed to devices with plastic
parts.
Attention!
Plastic parts.
There is a
risk of
electro-static
build-up.
Fig.1: Warning sign
NOTICE
▶The warning sign must not be removed from the device.
Overvoltage protection
If the pressure transducer is used as a category 1 G device, a
suitable overvoltage arrester must be installed upstream (see
BetrSichV [German Health and Safety in the Workplace Regu-
lation] and EN 60079-14).
Circuit diagram
When choosing the requisite Zener barrier or power discon-
nectors for operating an intrinsically safe device in a poten-
tially explosive environment, particular care must be taken to
ensure that this/these will not impair the device's functional-
ity in any way. The diagram below illustrates a typical layout
comprising a power supply unit, Zener barrier and screw-in
probe or measuring transducer.
10 Electrical connection

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10 Electrical connection
P
I
+UB
UB
+UB
-UB24 V DC
4...20mA
RB
RL
l
(mA) l
(mA)
+
-
230 VAC
Measuring transducer/
screw-in probe Zener barrier Power
supply
unit
Shielded
cable
Measuring transducer/
screw-in probe
Buffer
amplifier
Power
supply
Fig.2: Diagrams: Procurement
Description of an example circuit
The supply voltage provided by the power supply unit, which
might be 24 V DC for example, is conducted via the Zener
barrier. The Zener barrier contains protective components in
the form of series resistors and Zener diodes. The operating
voltage is conducted from the Zener barrier to the device; a
particular signal current flows, depending on the pressure.
DANGER
Danger of explosion!
▶Risk of death or severe injury.
▶Use of intrinsically safe devices as
Zone-0 equipment powered only using
an earth-free, galvanically isolated
power disconnector
Selection criteria for Zener barriers and power disconnectors
The supply voltage must not fall below the device's minimum
supply voltage UO min, otherwise the device may not function
correctly. The minimum supply voltage is stipulated in the
product-specific datasheet under "Output signal/auxiliary
power". When using a galvanically isolated power discon-
nector with linear limitation, note that the linear limitation re-
duces the device's terminal voltage as with a Zener barrier.
Also note that, should you choose to use a signal buffer amp-
lifier, a certain voltage drop will occur, as a result of which
the measuring transducer's operating voltage will also fall.
Test criteria for choosing the Zener barrier
In order to ensure that the supply voltage does not fall below
UO min, it is important to check the minimum supply voltage
that will be available when the device is set to its maximum
output level. Its maximum output level, i.e. its maximum/
nominal output signal (20 mA), can be achieved by applying
the maximum physical input signal (pressure).
Information for choosing the Zener barrier can be found in
the technical data for the Zener barrier. It is also possible to
calculate the value, however. If a maximum signal current of
0.02 A is assumed, a certain voltage drop across the Zener
barrier's series resistor can be determined in accordance
with Ohm's law. This voltage drop must be subtracted from
the power supply unit's voltage in order to obtain the terminal
voltage across the device when it is set to its maximum out-
put level. If this voltage is less than the minimum supply
voltage, either a different barrier or a higher supply voltage
must be chosen.
NOTICE
▶When choosing the ballasts, consider the maximum op-
erating conditions in accordance with the type examina-
tion certificate. To evaluate the ballasts, the most recent
version of their technical documentation must be used in
order to ensure that all the intrinsically safe components
remain intrinsically safe when they are interconnected.
Calculation example for choosing a Zener barrier
The nominal voltage of the power supply unit (supply) up-
stream of the Zener barrier is 24 VDC ± 5%. This gives:
– Maximum supply voltage:
USup max = 24 V * 1.05 = 25.2 V
– Minimum supply voltage:
USup min = 24 V * 0.95 = 22.8 V
The Zener barrier's series resistance is given as 295 Ohm.
The following values must now be calculated:
– Voltage drop across the barrier (at maximum output
level):
Udr barrier = 295 Ω * 0.02 A = 5.9 V
– Terminal voltage of the device with Zener barrier:
Ute = USup min – Udr barrier = 22.8 V – 5.9 V = 16.9 V
– Minimum supply voltage for the device (specified in
datasheet):
Ute min = 12 VDC (corresponds to UO min)
Condition:
Ute ≥ Ute min
Result:
The terminal voltage of the device with Zener barrier is 16.9
V, which is higher than the device's minimum supply voltage
of 12 VDC. This means that, with regard to the supply voltage,
the correct Zener barrier has been chosen.
NOTICE
▶No line resistances have been listed for this calculation.
However, these additionally result in a voltage drop,
which must be taken into account.
10.3 2-wire system (output code 4A, 4AS, 4AX, 4AXS)
Pin assignment
ISO 4400
1
2
3
M12x1
1
4
3
2
Pin Description
1 L+, supply voltage
2 L-, supply voltage
3 n. c.
4 PE, protective earth conductor
Circuit diagram

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P
I
A
UB
Supply +
Supply -
10.3.1 Electrical connection
● Connect the product in accordance with the pin assign-
ment.
11 Commissioning
1. The device must be properly installed
2. The device must not exhibit any visible defects
3. The device must be operated within the specifications
(see datasheet and EC type examination certificate).
11 Commissioning

12 Error clearance
Error Error cause Error clearance
No output signal Wrongly connected Check connections
Cable break Check all cable connections
Faulty measurement device (signal input) Check the ammeter (miniature fuse) or
the analogue input of the signal
processing unit
Analogue output signal too low Load resistance too high Check the load resistance
Supply voltage too low Check the output voltage of the power
supply unit
Faulty energy supply Check the power supply unit and the
supply voltage across the device
Output signal slightly shifted The sensor diaphragm is heavily
contaminated
Clean it with a non-abrasive cleaning
solution and soft brush or sponge
The sensor diaphragm is encrusted or
covered in limescale
Recommendation: Have it descaled or
cleaned by GEMÜ
Output signal significantly shifted The sensor diaphragm is damaged (due
to gauge pressure or having a
mechanical cause)
Check the diaphragm. If it is damaged,
send the device to GEMÜ for repair.
Incorrect output signal or no output
signal
Cable damage having a mechanical,
thermal or chemical cause
Check the cable. Check the housing for
pitting. If it is damaged, send the device
to GEMÜ for repair.
12 Error clearance
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GEMÜ 3140 ... X

www.gemu-group.com 17 / 20 GEMÜ 3140 ... X
13 Inspection/servicing
DANGER
Danger of explosion
▶Risk of death or severe injury.
●Danger from sparking. Only clean the
product with an anti-static or damp
cloth.
– The product is designed to be low maintenance.
– Make sure that the product is switched off and clean it
with a damp cloth and a non-abrasive cleaning solu-
tion.
– If deposits or contaminants build up on the dia-
phragm, we recommend that you set appropriate
maintenance intervals.
– Make sure that the product has been properly shut
down and clean the diaphragm with a non-abrasive
cleaning solution and soft brush or sponge.
– If limescale has built up on the diaphragm, descale the
product.
● Carry out inspection and servicing for products in the po-
tentially explosive area to DIN EN 60079-17.
14 Disposal
1. Pay attention to adhered residual material and gas diffu-
sion from penetrated media.
2. Dispose of all parts in accordance with the disposal regu-
lations/environmental protection laws.
15 Returns
Legal regulations for the protection of the environment and
personnel require that the completed and signed return deliv-
ery note is included with the dispatch documents. Returned
goods can be processed only when this note is completed. If
no return delivery note is included with the product, GEMÜ
cannot process credits or repair work but will dispose of the
goods at the operator's expense.
1. Clean the product.
2. Request a return delivery note from GEMÜ.
3. Complete the return delivery note.
4. Send the product with a completed return delivery note to
GEMÜ.
15 Returns

16 Declaration of conformity according to 2014/30/EU (EMC Directive)
EU Declaration of Conformity
according to 2014/30/EU (EMC Directive)
We, GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG
Fritz-Müller-Straße 6-8
74653 Ingelfingen-Criesbach, Germany
declare that the product listed below complies with the safety requirements of the EMC Directive 2014/30/EU.
Description of the product: GEMÜ 3140
Technical standards used:
– DIN EN 61326-1 (industrial processes)
Ingelfingen-Criesbach 29-05-2018
Joachim Brien
Head of Technical Department
www.gemu-group.com
18 / 20
GEMÜ 3140 ... X
16 Declaration of conformity according to 2014/30/EU (EMC Directive)

17 Declaration of conformity in accordance with 2014/34/EU (ATEX)
EU Declaration of Conformity
in accordance with 2014/34/EU (ATEX)
We, GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG
Fritz-Müller-Straße 6-8
74653 Ingelfingen-Criesbach, Germany
declare that the product listed below complies with the requirements of directive 2014/34/EU for intended use in potentially
explosive areas.
Description of the product : GEMÜ pressure transducer 3140
Marking : 3140 … X
X = Order option special version
Explosion protection marking: Housing material stainless steel (code 7):
Gas: II 1G Ex ia IIC T4 Ga
Dust: II 1D Ex ia IIIC T 85 °C Da
Housing material PVDF (code 20):
Gas: II 2G Ex ia IIC T4 Gb
Dust: II 2D Ex ia IIIC T 85 °C Db
EC type examination certificate: IBExU08ATEX1125 X
Notified body: IBEXu, No. 0637
The notified body IBExU, No. 0637 has certified the above mentioned product and is-
sued the following certificate:
IBExU08ATEX1125 X.
The Essential Safety and Health Requirements are met by compliance with the standards listed below that are applicable for
the above mentioned product:
– DIN EN 60079-0
– DIN EN 60079-11
– DIN EN 60079-26
Ingelfingen-Criesbach 29-05-2018
Joachim Brien
Head of Technical Department
GEMÜ 3140 ... Xwww.gemu-group.com 19 / 20
17 Declaration of conformity in accordance with 2014/34/EU (ATEX)

GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG
Fritz-Müller-Straße 6-8 D-74653 Ingelfingen-Criesbach
Tel. [phone] · [email protected]
www.gemu-group.com
Subject to alteration
05.2019 | 88598921
*88598921*