Endress+Hauser Deltabar S FMD77 Technical specifications

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Brief Operating Instructions
Deltabar S FMD77, FMD78,
PMD75
Differential pressure measurement
These Brief Operating Instructions are not a substitute for the
Operating Instructions pertaining to the device.
Detailed information about the device can be found in the
Operating Instructions and the additional documentation.
Available for all device versions via
• Internet: www.endress.com/deviceviewer
• Smartphone/tablet: Endress+Hauser Operations app
KA01018P/00/EN/19.21-00
71561638
2022-04-05

Associated documentation Deltabar S FMD77, FMD78, PMD75
2 Endress+Hauser
1 Associated documentation
Order code:
Ext. ord. cd.:
Ser. no.:
www.endress.com/deviceviewer Endress+Hauser
Operations App
XXXXXXXXXXXX
XXXXX-XXXXXX
XXX.XXXX.XX
Serial number
1.
3.
2.
A0023555
2 About this document
2.1 Document function
The Brief Operating Instructions contain all the essential information from incoming
acceptance to initial commissioning.

Deltabar S FMD77, FMD78, PMD75 About this document
Endress+Hauser 3
2.2 Symbols used
2.2.1 Safety symbols
DANGER
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
serious or fatal injury.
WARNING
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
serious or fatal injury.
CAUTION
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
minor or medium injury.
NOTICE
This symbol contains information on procedures and other facts which do not result in
personal injury.
2.2.2 Electrical symbols
Protective earth (PE)
Ground terminals that must be connected to ground prior to establishing any other
connections.
The ground terminals are located on the interior and exterior of the device:
• Interior ground terminal: protective earth is connected to the mains supply.
• Exterior ground terminal: device is connected to the plant grounding system.
2.2.3 Symbols for certain types of information and graphics
Symbols for certain types of information and graphics
Permitted
Procedures, processes or actions that are permitted
Forbidden
Procedures, processes or actions that are forbidden
Tip
Indicates additional information
Reference to documentation
A
Reference to page
Visual inspection
Notice or individual step to be observed

Basic safety instructions Deltabar S FMD77, FMD78, PMD75
4 Endress+Hauser
1, 2, 3, ...
Item numbers
1.
,
2.
,
3.
Series of steps
Result of a step
2.3 Registered trademarks
•KALREZ®
Trademark of E.I. Du Pont de Nemours & Co., Wilmington, USA
•TRI-CLAMP®
Trademark of Ladish & Co., Inc., Kenosha, USA
• HART®
Registered trademark of the FieldComm Group, Austin, USA
•GORE-TEX®
Trademark of W.L. Gore & Associates, Inc., USA
3 Basic safety instructions
3.1 Requirements for the personnel
Personnel must meet the following requirements for their tasks:
‣Trained, qualified specialists must be suitably qualified to perform this function and task
‣Are authorized by the plant owner/operator
‣Are familiar with federal/national regulations
‣Before starting work, read and understand the instructions in the manual and
supplementary documentation as well as the certificates (depending on the application)
‣Follow instructions and comply with basic conditions
3.2 Intended use
The Deltabar S is a differential pressure / pressure transmitter for measuring flow, level,
pressure or differential pressure.
3.2.1 Foreseeable incorrect use
The manufacturer is not liable for damage caused by improper or non-intended use.
Verification for borderline cases:
‣For special fluids and fluids for cleaning, Endress+Hauser is glad to provide assistance in
verifying the corrosion resistance of fluid-wetted materials, but does not accept any
warranty or liability.

Deltabar S FMD77, FMD78, PMD75 Basic safety instructions
Endress+Hauser 5
3.3 Workplace safety
When working on and with the device:
‣Wear the required personal protective equipment according to federal/national
regulations.
‣Switch off the supply voltage before connecting the device.
3.4 Operational safety
Risk of injury!
‣Operate the device only if it is in proper technical condition, free from errors and faults.
‣The operator is responsible for the interference-free operation of the device.
Modifications to the device
Unauthorized modifications to the device are not permitted and can lead to unforeseeable
dangers:
‣If, despite this, modifications are required, consult with Endress+Hauser.
Repair
To ensure continued operational safety and reliability:
‣Carry out repairs on the device only if they are expressly permitted.
‣Observe federal/national regulations pertaining to the repair of an electrical device.
‣Use original spare parts and accessories from Endress+Hauser only.
Hazardous area
To eliminate danger to persons or the installation when the device is used in the hazardous
area (e.g. explosion protection, pressure vessel safety):
‣Check the nameplate to verify whether the ordered device can be used for the intended
purpose in the hazardous area.
‣Observe the specifications in the separate supplementary documentation, which is an
integral part of this manual.
3.5 Product safety
This measuring device is designed in accordance with good engineering practice to meet state-
of-the-art safety requirements, has been tested, and left the factory in a condition in which it
is safe to operate.
It meets the general safety standards and legal requirements. It also complies with the EC
directives listed in the device-specific EC Declaration of Conformity. Endress+Hauser confirms
this by affixing the CE mark to the device.
3.6 Functional safety SIL3 (optional)
The Functional Safety Manual must be strictly observed for devices that are used in functional
safety applications.

Incoming acceptance and product identification Deltabar S FMD77, FMD78, PMD75
6 Endress+Hauser
4 Incoming acceptance and product identification
4.1 Incoming acceptance
DELIVERY NOTE
1 = 2
A0016870
• Is the order code on the delivery note (1) identical to the order code on the product sticker
(2)?
• Are the goods undamaged?
• Do the data on the nameplate correspond to the order specifications and the delivery note?
• Is the documentation available?
• If required (see nameplate): are the Safety Instructions (XA) provided?
If one of these conditions is not fulfilled, please contact your Endress+Hauser sales office.
4.2 Storage and transport
4.2.1 Storage conditions
Use original packaging.
Store the measuring device in clean and dry conditions and protect from damage caused by
shocks (EN 837-2).
4.2.2 Transporting the product to the measuring point
LWARNING
Incorrect transport!
Housing and membrane may become damaged, and there is a risk of injury!
‣Transport the measuring device to the measuring point in its original packaging or by the
process connection.
‣Follow the safety instructions and transport conditions for devices weighing more than 18
kg (39.6 lbs).

Deltabar S FMD77, FMD78, PMD75 Mounting
Endress+Hauser 7
5 Mounting
NOTICE
Incorrect handling!
Damage to the device!
‣The removal of the screws with item number (1) is not permissible under any
circumstances and will void the warranty.
1
A0025336
5.1 Mounting requirements
5.1.1 Dimensions
For dimensions, please refer to the Technical Information for Deltabar S TI00382P,
"Mechanical construction" section.
5.2 Mounting the device
• Due to the orientation of the Deltabar S, a zero point shift may occur, i.e. when the vessel is
empty, the measured value does not display zero. You can correct this zero point shift either
directly on the device via the  button or via remote operation.
• General recommendations for routing the impulse piping can be found in DIN 19210
"Methods for measurement of fluid flow; differential piping for flow measurement devices"
or the corresponding national or international standards.
• Using a valve manifold allows for easy commissioning, installation and maintenance
without interrupting the process.
• When routing the impulse piping outdoors, ensure that sufficient anti-freeze protection is
used, e.g. by using pipe heat tracing.
• Lay the impulse piping with a monotonic gradient of at least 10 %.
• To ensure optimum readability of the local display, it is possible to rotate the housing by up
to 380°.
• Endress+Hauser offers a mounting bracket for installation on pipes or walls.
5.2.1 Installation for flow measurement
Flow measurement in gases with PMD75
Mount the Deltabar S above the measuring point so that the condensate can drain into the
process pipe.

Mounting Deltabar S FMD77, FMD78, PMD75
8 Endress+Hauser
Flow measurement in vapors with PMD75
• Mount the Deltabar S below the measuring point.
• Mount the condensate traps at the same level as the tapping points and at the same
distance to the Deltabar S.
• Prior to commissioning, fill the impulse piping to the height of the condensate traps.
Flow measurement in liquids with PMD75
• Mount the Deltabar S below the measuring point so that the impulse piping is always filled
with liquid and gas bubbles can run back into the process piping.
• When measuring in media with solid parts, such as dirty liquids, installing separators and
drain valves is useful for capturing and removing sediment.
5.2.2 Installation for level measurement
Level measurement in an open vessel with PMD75
• Mount the Deltabar S below the lower measuring connection so that the impulse piping is
always filled with liquid.
• The negative side is open to atmospheric pressure.
• When measuring in media with solid parts, such as dirty liquids, installing separators and
drain valves is useful for capturing and removing sediment.
Level measurement in an open vessel with FMD77
• Mount the Deltabar S directly on the vessel.
• The negative side is open to atmospheric pressure.
Level measurement in a closed vessel with PMD75
• Mount the Deltabar S below the lower measuring connection so that the impulse piping is
always filled with liquid.
• Always connect the impulse piping on the negative side above the maximum level.
• When measuring in media with solid parts, such as dirty liquids, installing separators and
drain valves is useful for capturing and removing sediment.
Level measurement in a closed vessel with FMD77
• Mount the Deltabar S directly on the vessel.
• Always connect the impulse piping on the negative side above the maximum level.
• When measuring in media with solid parts, such as dirty liquids, installing separators and
drain valves is useful for capturing and removing sediment.
Level measurement in a closed vessel with FMD78
• Mount the Deltabar S below the lower diaphragm seal.
• The ambient temperature should be the same for both capillaries.
Level measurement is only guaranteed between the upper edge of the lower diaphragm seal
and the lower edge of the upper diaphragm seal.

Deltabar S FMD77, FMD78, PMD75 Mounting
Endress+Hauser 9
Level measurement in a closed vessel with superimposed steam with PMD75
• Mount the Deltabar S below the lower measuring connection so that the impulse piping is
always filled with liquid.
• Always connect the impulse piping on the negative side above the maximum level.
• The condensate trap ensures constant pressure on the negative side.
• When measuring in media with solid parts, such as dirty liquids, installing separators and
drain valves is useful for capturing and removing sediment.
Level measurement in a closed vessel with superimposed steam with FMD77
• Mount the Deltabar S directly on the vessel.
• Always connect the impulse piping on the negative side above the maximum level.
• The condensate trap ensures constant pressure on the negative side.
• When measuring in media with solid parts, such as dirty liquids, installing separators and
drain valves is useful for capturing and removing sediment.
5.2.3 Installation for pressure measurement (160 bar (2400 psi) and 250 bar (3750
psi) measuring cell)
The negative side is open to atmospheric pressure via the reference air filters screwed into the
LP side flange.
Mount the Deltabar S above the measuring point so that the condensate can drain into the
process pipe.
5.2.4 Installation for differential pressure measurement
Differential pressure measurement in gases and vapors with PMD75
Mount the Deltabar S above the measuring point so that the condensate can drain into the
process pipe.
Differential pressure measurement in liquids with PMD75
• Mount the Deltabar S below the measuring point so that the impulse piping is always filled
with liquid and gas bubbles can run back into the process piping.
• When measuring in media with solid parts, such as dirty liquids, installing separators and
drain valves is useful for capturing and removing sediment.
Differential pressure measurement in gases, vapors and liquids with FMD78
• Mount diaphragm seals with capillaries on pipes at the top or side.
• For vacuum applications: mount the Deltabar S below the measuring point.
• The ambient temperature should be the same for both capillaries.
5.2.5 Installation instructions for devices with diaphragm seals (FMD78)
• Please note that the hydrostatic pressure of the liquid columns in the capillaries can cause
zero point shift. The zero point shift can be corrected.
• Do not clean or touch the process membrane of the diaphragm seal with hard or pointed
objects.
• Do not remove the protection on the process membrane until just before installation.

Mounting Deltabar S FMD77, FMD78, PMD75
10 Endress+Hauser
NOTICE
Incorrect handling!
Damage to the device!
‣A diaphragm seal and the pressure transmitter together form a closed, calibrated system
that has been filled through openings in the diaphragm seal and in the pressure
transmitter's measurement system. These openings are sealed and must not be opened!
‣If a mounting bracket is used, sufficient strain relief must be ensured for the capillaries in
order to prevent them from buckling (bending radius > 100 mm (3.94 in)).
‣Please observe the application limits of the diaphragm seal fill fluid as detailed in the
Technical Information for Deltabar S TI00382P, "Planning instructions for diaphragm seal
systems" section.
NOTICE
In order to obtain more precise measurement results and to avoid a defect in the device,
mount the capillaries as follows:
‣Mount capillaries vibration-free (in order to avoid additional pressure fluctuations).
‣Do not mount capillaries in the vicinity of heating or cooling lines.
‣Insulate capillaries if the ambient temperature is below or above the reference
temperature.
‣Mount capillaries with a bending radius > 100 mm (3.94 in)
‣Do not use capillaries as a carrying aid for the diaphragm seals!
‣In the case of two-sided diaphragm seal systems, the ambient temperature and the length
of both capillaries should be identical.
‣Two identical diaphragm seals (e.g. diameter, material etc.) should always be used for the
negative and positive side (standard delivery).
5.2.6 Seal for flange mounting
NOTICE
Incorrect measurement results.
The seal is not allowed to press against the process membrane as this could affect the
measurement result.
‣Ensure that the seal is not touching the process membrane.

Deltabar S FMD77, FMD78, PMD75 Mounting
Endress+Hauser 11
5.2.7 Wall and pipe mounting (optional)
Endress+Hauser offers the following mounting brackets to install the device on pipes or walls:
Standard version Heavy-duty version
A0031326 A0031327
The standard mounting bracket version is not suitable for use in an application subject to
vibrations.
The heavy-duty version of the mounting bracket has been tested for vibration resistance
according to IEC 61298-3, see the "Vibration resistance" section of the Technical
Information.
If a valve manifold is used, its dimensions should also be taken into consideration.
Bracket for wall and pipe mounting including retaining bracket for pipe mounting and two
nuts.
For the technical data (such as the dimensions or order numbers for screws), see the
Accessories Document SD01553P/00/EN.
Please note the following when mounting:
• To prevent the mounting screws from scoring, they must be lubricated with a multi-purpose
grease before mounting.
• When mounting on a pipe, tighten the nuts on the bracket uniformly with a torque of at
least 30 Nm (22.13 lbf ft).
• For installation purposes, only use the screws with item number (2) (see the following
diagram).
NOTICE
Incorrect handling!
Damage to the device!
‣The removal of the screws with item number (1) is not permissible under any
circumstances and will void the warranty.

Mounting Deltabar S FMD77, FMD78, PMD75
12 Endress+Hauser
1
2
1
2
A0025335
5.2.8 Turning the housing
The housing can be rotated by up to 380° by loosening the setscrew.
T14 T15 T17
32
A0019996
1. T14 and T15 housing: loosen the setscrew with a 2 mm (0.08 in) Allen key. T17
housing: loosen the setscrew with a 3 mm (0.12 in) Allen key.
2. Rotate the housing (max. up to 380 °).
3. Retighten the setscrew with 1 Nm (0.74 lbf ft).

Deltabar S FMD77, FMD78, PMD75 Electrical connection
Endress+Hauser 13
5.2.9 Closing the housing covers
NOTICE
Devices with EPDM cover seal - leaking transmitter!
Mineral-, animal- or plant-based lubricants cause the EPDM cover seal to swell and the
transmitter to leak as a result.
‣It is not necessary to grease the thread due to the coating applied to the thread at the
factory.
NOTICE
The housing cover can no longer be closed.
Damaged thread!
‣When closing the housing covers make sure that the threads on the covers and the housing
are free from dirt, for example sand. If you encounter resistance when closing the covers,
then check the threads again for dirt.
Closing the covers on the hygienic stainless steel housing (T17)
The covers for the terminal compartment and electronics compartment are hooked into the
housing and closed with a screw in each case. These screws should be tightened handtight
(2 Nm (1.48 lbf ft)) to the stop to ensure that the covers sit tightly.
6 Electrical connection
6.1 Connecting requirements
LWARNING
Risk of electric shock!
If the operating voltage is > 35 VDC: Dangerous contact voltage at terminals.
‣In a wet environment, do not open the cover if voltage is present.

Electrical connection Deltabar S FMD77, FMD78, PMD75
14 Endress+Hauser
LWARNING
An incorrect connection compromises electrical safety!
‣Risk of electric shock and/or explosion! Switch off the supply voltage before connecting the
device.
‣When using the measuring device in hazardous areas, installation must also comply with
the applicable national standards and regulations and the Safety Instructions or
Installation or Control Drawings.
‣Devices with integrated overvoltage protection must be grounded.
‣Protective circuits against reverse polarity, HF influences and overvoltage peaks are
integrated.
‣The supply voltage must match the power supply on the nameplate, see Operating
Instructions →  2.
‣Switch off the supply voltage before connecting.
‣Remove the housing cover of the terminal compartment.
‣Guide the cable through the gland. Preferably use a twisted, shielded two-wire cable.
‣Connect the device as indicated in the diagram.
‣Screw down the housing cover.
‣Switch on the supply voltage.
Shielding/potential equalization
• You achieve optimum shielding against disturbances if the shielding is connected on both
sides (in the cabinet and on the device). If potential equalization currents are expected in
the plant, only ground shielding on one side, preferably at the transmitter.
• When using in hazardous areas, you must observe the applicable regulations.

Deltabar S FMD77, FMD78, PMD75 Electrical connection
Endress+Hauser 15
4... 20mA Test
Test
Test
4... 20mA Test
1
8
6
7
2
3
4
5
A0019989
1 Housing
2 Minimum supply voltage = 10.5 V DC, jumper is set as illustrated in the diagram.
2 Minimum supply voltage = 11.5 V DC, jumper is set to the "Test" position.
3 4 to 20 mA
4 Devices with integrated overvoltage protection are labeled "OVP" (overvoltage protection) here.
5 External ground terminal
6 4 to 20 mA test signal between positive and test terminal
7 Internal ground terminal
8 Jumper for 4 to 20 mA test signal
6.1.1 Connection of devices with Harting plug Han7D
Han7D
–
+
+ –
–
+
A B
A0019990
A Electrical connection for devices with Harting plug Han7D
B View of the plug-in connection on the device
- Brown
 Green/yellow
+ Blue

Electrical connection Deltabar S FMD77, FMD78, PMD75
16 Endress+Hauser
6.1.2 Connection of devices with M12 plug
PIN
2
1
34
A0011175
1 Signal +
2 Not assigned
3 Signal -
4 Ground
6.2 Connecting the measuring unit
6.2.1 Supply voltage
LWARNING
Supply voltage might be connected!
Risk of electric shock and/or explosion!
‣When using the measuring device in hazardous areas, installation must also comply with
the applicable national standards and regulations and the Safety Instructions or
Installation or Control Drawings.
‣All explosion protection data are given in separate Ex documentation, which is available
upon request. The Ex documentation is supplied as standard with all devices approved for
use in explosion hazardous areas.
Electronic version Jumper for 4 to 20 mA test signal in
"Test" position (as-delivered state)
Jumper for 4 to 20 mA test signal in
"Non-Test" position
4 to 20 mA HART, version for
non-hazardous area
11.5 to 45 V DC 10.5 to 45 V DC
Measuring the 4 to 20 mA test signal
A 4 to 20 mA test signal can be measured via the positive and test terminal without
interruption. The minimum supply voltage of the measuring device can be reduced by
changing the position of the jumper. As a result, operation with lower supply voltages is also
possible.

Deltabar S FMD77, FMD78, PMD75 Electrical connection
Endress+Hauser 17
To keep the measured error below 0.1 %, the ammeter should have an internal resistance of <
0.7 Ω. Observe the position of the jumper according to the following table.
Jumper position for test signal Description
Test
• Measure 4 to 20 mA test signal via positive and test terminal: possible.
(Thus, the output current can be measured without interruption via the
diode.)
• As-delivered state
• Minimum supply voltage: 11.5 V DC
Test
• Measure 4 to 20 mA test signal via positive and test terminal: not possible.
• Minimum supply voltage: 10.5 V DC
6.2.2 Terminals
• Supply voltage and internal ground terminal: 0.5 to 2.5 mm2 (20 to 14 AWG)
• External ground terminal: 0.5 to 4 mm2 (20 to 12 AWG)
6.2.3 Cable specification
• Endress+Hauser recommends using twisted, shielded two-wire cables.
• Cable diameter: 5 to 9 mm (0.2 to 0.35 in)

Electrical connection Deltabar S FMD77, FMD78, PMD75
18 Endress+Hauser
6.2.4 Load
30
30
20
20
11.5
12
40
40
45
45
1239
1217
1456
1434
804
782
369
347
Test
B
B
30
30
20
20
10.5
11 U
[V]
40
40
45
45
1282
1260
1500
1478
847
826
413
391
Test
A
A
1
RLmax ≤U – 11 V
23 mA
4
2
3
1
2
3
[ ]W
RLmax
RLmax ≤U – 1 V2
23 mA
4
[ ]W
RLmax
U
[V]
RLmax ≤U – 1 V0.5
23 mA
4 RLmax ≤U – 1 V1.5
23 mA
4
[ ]W
RLmax
[ ]W
RLmax
U
[V]
U
[V]
A0020467
A Jumper for 4 to 20 mA test signal set to "Non-Test" position
B Jumper for 4 to 20 mA test signal set to "Test" position
When operating using a handheld terminal or a PC with an operating program, a
minimum communication resistance of 250 Ω has to be taken into account.

Deltabar S FMD77, FMD78, PMD75 Operation options
Endress+Hauser 19
7 Operation options
7.1 Operation without an operating menu
Operation options Explanation Graphic Description
Local operation
without device display
The device is operated using the operating
keys and DIP switches on the electronic
insert.
on
off
Display
Zero
Span
SW / P2=High
delta p only
SW / Alarm min
SW / Ö
damping
A0029995
→  19
7.1.1 Position of operating elements
In the case of the aluminum and stainless steel housing (T14), the operating keys are located
either under the protective flap on the exterior of the device or inside on the electronic insert.
In the case of the hygienic stainless steel housing (T17), the operating keys are always inside
on the electronic insert. In addition, there are operating keys on the optional local display.
A0016499
 1 Operating keys, outside

Operation options Deltabar S FMD77, FMD78, PMD75
20 Endress+Hauser
21
PC
3 4 5 6
1 2
t
on
off
A0020031
 2 Operating keys, inside
1 DIP switch for locking/unlocking parameters relevant to the measured value
2 DIP switch for switching damping on/off
3 Green LED to indicate value is accepted
4 Operating keys
5 Slot for optional display
6 Slot for optional HistoROM®/M-DAT
Function of the DIP switches
To perform the corresponding function, press the key or key combination for at least 3 s. Press
the key combination for at least 6 s for a reset.
Meaning
Adopt lower range value. A reference pressure is present at the device. For
a detailed description, see also the "Pressure measuring mode" or "Level
measuring mode" section.
Adopt lower range value. A reference pressure is present at the device. For
a detailed description, see also the "Pressure measuring mode" or "Level
measuring mode" section.
Position adjustment.
and and
Reset all parameters. The reset via operating keys corresponds to the
software reset code 7864.
and
Copy the configuration data from the optional HistoROM®/M-DAT module
to the device.