Endress+Hauser Cerabar M User manual

Products Solutions Services
BA00382P/00/EN/20.16
71316868
Valid from software version:
01.00.zz
Operating Instructions
Cerabar M
Deltabar M
Deltapilot M
Process pressure / Differential pressure, Flow /
Hydrostatic
Deltapilot M
Deltabar M
Cerabar M

Cerabar M, Deltabar M, Deltapilot M
2Endress+Hauser
A0023555
Make sure the document is stored in a safe place such that it is always available when
working on or with the device.
To avoid danger to individuals or the facility, read the "Basic safety instructions" section
carefully, as well as all other safety instructions in the document that are specific to
working procedures.
The manufacturer reserves the right to modify technical data without prior notice. Your
Endress+Hauser distributor will supply you with current information and updates to
these Instructions.
1.
Order code:
Ext. ord. cd.:
Ser. no.:
www.endress.com/deviceviewer Endress+Hauser Operations App
XXXXXXXXXXXX
XXXXX-XXXXXX
XXX.XXXX.XX
Serial number
2.
3.

Cerabar M, Deltabar M, Deltapilot M
Endress+Hauser 3
Table of contents
1 Document information . . . . . . . . . . . . . . 4
1.1 Document function . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Basic safety instructions . . . . . . . . . . . . . 6
2.1 Requirements concerning the staff . . . . . . . . . . . . . 6
2.2 Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Workplace safety . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Operational safety . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.5 Hazardous area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.6 Product safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.7 Functional Safety SIL (optional) . . . . . . . . . . . . . . . 7
3 Identification . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Product identification . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Device designation . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.4 CE mark, Declaration of Conformity . . . . . . . . . . 11
4 Installation . . . . . . . . . . . . . . . . . . . . . . .12
4.1 Incoming acceptance . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Storage and transport . . . . . . . . . . . . . . . . . . . . . . 12
4.3 Installation conditions . . . . . . . . . . . . . . . . . . . . . 12
4.4 General installation instructions . . . . . . . . . . . . . 13
4.5 Installing Cerabar M . . . . . . . . . . . . . . . . . . . . . . . 14
4.6 Installing Deltabar M . . . . . . . . . . . . . . . . . . . . . . 24
4.7 Installing Deltapilot M . . . . . . . . . . . . . . . . . . . . . 32
4.8 Mounting of the profile seal for universal process
mounting adapter . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.9 Closing the housing cover . . . . . . . . . . . . . . . . . . 37
4.10 Post-installation check . . . . . . . . . . . . . . . . . . . . . 37
5 Electrical connection . . . . . . . . . . . . . . . 38
5.1 Connecting the device . . . . . . . . . . . . . . . . . . . . . 38
5.2 Connecting the measuring unit . . . . . . . . . . . . . . 40
5.3 Overvoltage protection (optional) . . . . . . . . . . . . 42
5.4 Post-connection check . . . . . . . . . . . . . . . . . . . . . 44
6 Operation. . . . . . . . . . . . . . . . . . . . . . . . . 45
6.1 Operating options . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.2 Operation without operating menu . . . . . . . . . . 46
6.3 Operation with an operating menu . . . . . . . . . . 48
7 Integrating transmitter using HART®
protocol . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.1 HART process variables and measured values . 57
7.2 Device variables and measured values . . . . . . . . 58
8 Commissioning. . . . . . . . . . . . . . . . . . . .59
8.1 Function check . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.2 Commissioning without an operating menu . . . 60
8.3 Commissioning with an operating menu . . . . . . . 63
8.4 Position zero adjustment . . . . . . . . . . . . . . . . . . . . 64
8.5 Level measurement (Cerabar M and Deltapilot M)
65
8.6 Linearization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
8.7 Pressure measurement . . . . . . . . . . . . . . . . . . . . . 79
8.8 Electrical differential pressure measurement with
gauge pressure sensors (Cerabar M or Deltapilot M)
81
8.9 Differential pressure measurement (Deltabar M) .
83
8.10 Flow measurement (Deltabar M) . . . . . . . . . . . . . 85
8.11 Level measurement (Deltabar M) . . . . . . . . . . . . . 88
8.12 Backup or duplicate device data . . . . . . . . . . . . . . 99
9 Maintenance . . . . . . . . . . . . . . . . . . . . 100
9.1 Cleaning instructions . . . . . . . . . . . . . . . . . . . . . 100
9.2 Exterior cleaning . . . . . . . . . . . . . . . . . . . . . . . . . 100
10 Troubleshooting . . . . . . . . . . . . . . . . . 101
10.1 Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
10.2 Response of output to errors . . . . . . . . . . . . . . . 103
10.3 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
10.4 Repair of Ex-certified devices . . . . . . . . . . . . . . 103
10.5 Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
10.6 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
10.7 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
10.8 Software history . . . . . . . . . . . . . . . . . . . . . . . . . 105
11 Technical data . . . . . . . . . . . . . . . . . . . 107
12 Appendix . . . . . . . . . . . . . . . . . . . . . . . 108
12.1 Overview of operating menu . . . . . . . . . . . . . . . 108
12.2 Description of parameters . . . . . . . . . . . . . . . . . 116
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Document information Cerabar M, Deltabar M, Deltapilot M
4Endress+Hauser
1 Document information
1.1 Document function
These Operating Instructions contain all the information that is required in various phases
of the life cycle of the device: from product identification, incoming acceptance and storage,
to mounting, connection, operation and commissioning through to troubleshooting,
maintenance and disposal.
1.2 Symbols used
1.2.1 Safety symbols
1.2.2 Electrical symbols
1.2.3 Tool symbols
Symbol Meaning
A0011189-DE
DANGER!
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
seriousor fatal injury.
A0011190-DE
WARNING!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
seriousor fatal injury.
A0011191-DE
CAUTION!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
minoror medium injury.
A0011192-DE
NOTICE!
This symbol contains information on procedures and other facts which do not result in
personalinjury.
Symbol Meaning Symbol Meaning
Direct current Alternating current
Direct current and alternating current Ground connection
A grounded terminal which, as far as
the operator is concerned, is grounded
via a grounding system.
Protective ground connection
A terminal which must be connected
to ground prior to establishing any
other connections.
Equipotential connection
A connection that has to be connected
to the plant grounding system: This
may be a potential equalization line or
a star grounding system depending on
national or company codes of practice.
Symbol Meaning
A0011221
Allen key
A0011222
Hexagon wrench
DANGER
WARNING
CAUTION
NOTICE
)

Cerabar M, Deltabar M, Deltapilot M Document information
Endress+Hauser 5
1.2.4 Symbols for certain types of information
1.2.5 Symbols in graphics
1.2.6 Symbols at the device
1.2.7 Registered trademarks
KALREZ®, VITON®, TEFLON®
Registered label of E.I. Du Pont de Nemours & Co., Wilmington, USA
TRI-CLAMP®
Registered label of Ladish & Co., Inc., Kenosha, USA
HART®
Registered trademark of the FieldComm Group, Austin, USA
GORE-TEX®
Registered label of W.L. Gore & Associates, Inc., USA
Symbol Meaning
A0011182
Permitted
Indicates procedures, processes or actions that are permitted.
A0011184
Forbidden
Indicates procedures, processes or actions that are forbidden.
A0011193
Tip
Indicates additional information.
A0015482
Reference to documentation
A0015484
Reference to page
A0015487
Reference to graphic
, , ... Series of steps
A0018343
Result of a sequence of actions
A0015502
Visual inspection
Symbol Meaning
1, 2, 3, 4, ... Item numbers
, , ... Series of steps
A, B, C, D, ... Views
Symbol Meaning
A0019159
Safety instructions
Observe the safety instructions contained in the associated Operating Instructions.
Connecting cable immunity to temperature change
Indicates that the connecting cables have to withstand a temperature of 85°C at least.
1.
2.
1.
2.
t 85°C>

Basic safety instructions Cerabar M, Deltabar M, Deltapilot M
6Endress+Hauser
2 Basic safety instructions
2.1 Requirements concerning the staff
The personnel for installation, commissioning, diagnostics and maintenance must fulfill the
following requirements:
• Trained, qualified specialists: must have a relevant qualification for this specific function
and task
• Are authorized by the plant owner/operator
• Are familiar with federal/national regulations
• Before beginning work, the specialist staff must have read and understood the instructions
in the Operating Instructions and supplementary documentation as well as in the
certificates (depending on the application)
• Following instructions and basic conditions
The operating personnel must fulfill the following requirements:
• Being instructed and authorized according to the requirements of the task by the facility's
owner-operator
• Following the instructions in these Operating Instructions
2.2 Designated use
The Cerabar M is a pressure transmitter for measuring level and pressure.
The Deltabar M is a differential pressure transmitter for measuring differential pressure,
flow and level.
The Deltapilot M is a hydrostatic pressure sensor for measuring level and pressure.
2.2.1 Incorrect use
The manufacturer is not liable for damage caused by improper or non-designated 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.
2.3 Workplace safety
For work 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.
2.4 Operational safety
Risk of injury!
‣Operate the device in proper technical condition and fail-safe condition only.
‣The operator is responsible for interference-free operation of the device.
‣Only disassemble the device in pressurless condition!
Conversions 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,

Cerabar M, Deltabar M, Deltapilot M Basic safety instructions
Endress+Hauser 7
‣Carry out repairs on the device only if they are expressly permitted.
‣Observe federal/national regulations pertaining to repair of an electrical device.
‣Use original spare parts and accessories from Endress+Hauser only.
2.5 Hazardous area
To eliminate a danger for persons or for the facility when the device is used in the hazardous
area (e.g. explosion protection, pressure vessel safety):
• Based on the nameplate, check whether the ordered device is permitted for the intended
use in the hazardous area.
• Observe the specifications in the separate supplementary documentation that is an
integral part of these Instructions.
2.6 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 they are safe to operate. It fulfills general safety requirements and legal requirements.
It also conforms to the EC directives listed in the device-specific EC declaration of conformity.
Endress+Hauser confirms this fact by applying the CE mark.
2.7 Functional Safety SIL (optional)
If using devices for applications with safety integrity, the Functional Safety Manual
(SD00347P/00/EN) must be observed thoroughly.

Identification Cerabar M, Deltabar M, Deltapilot M
8Endress+Hauser
3 Identification
3.1 Product identification
The following options are available for identification of the measuring device:
• Nameplate specifications
• Order code with breakdown of the device features on the delivery note
• Enter serial numbers from nameplates in W@M Device Viewer
(www.endress.com/deviceviewer): All information about the measuring device is
displayed.
For an overview of the technical documentation provided, enter the serial number from the
nameplates in the W@M Device Viewer (www.endress.com/deviceviewer).
3.2 Device designation
3.2.1 Device identification via the nameplate
• The MWP (maximum working pressure) is specified on the nameplate. This value refers
to a reference temperature of 20°C (68°F) or 100°F (38 °C) for ANSI flanges.
• The pressure values permitted at higher temperatures can be found in the following
standards:
– EN 1092-1: 2001 Tab. 18 1)
– ASME B 16.5a – 1998 Tab. 2-2.2 F316
– ASME B 16.5a – 1998 Tab. 2.3.8 N10276
– JIS B 2220
• The test pressure corresponds to the over pressure limit (OPL) of the device = MWP x 1.5
2).
• The Pressure Equipment Directive (EC Directive 97/23/EC) uses the abbreviation "PS". The
abbreviation "PS" corresponds to the MWP (maximum working pressure) of the measuring
device.
1) With regard to their stability-temperature property, the materials 1.4435 and 1.4404 are grouped together
under 13EO in EN 1092-1 Tab. 18. The chemical composition of the two materials can be identical.
2) The equation does not apply for PMP51 and PMP55 with a 40 bar (600 psi) or a 100 bar (1500 psi) measuring
cell.

Cerabar M, Deltabar M, Deltapilot M Identification
Endress+Hauser 9
Aluminum housing
A0030017
Fig. 1: Nameplate
1 Device name
2 Order code (for re-orders)
3 Serial number (for identification)
4 Extended order code (complete)
5 MWP (maximum working pressure)
6 Electronic version (output signal)
7Min./max.span
8 Nominal measuring range
9 Supply voltage
10 Unit of length
11 ID number of notified body with regard to ATEX (optional)
12 ID number of notified body with regard to Pressure Equipment Directive (optional)
13 Approvals
14 Device version
15 Software version
16 Degree of protection
17 Wetted materials
18 Approval-specific information
Devices suitable for oxygen applications are fitted with an additional nameplate.
A0030019
Fig. 2: Additional nameplate for devices suitable for oxygen applications
1 Maximum pressure for oxygen applications
2 Maximum temperature for oxygen applications
3 Layout identification of the nameplate
ex works FW:
Dev.Rev.:
250002755-C
Ext. order code:
Ser. no.:
U=
Span
P
MWP
Order code:
Made in Germany, D-79689 Maulburg Mat.:
250002756-E
L=
123
4
5 6 7
8 9 10
11
12 13 14
15 16
17
18
18
Pmax
Tmax
for oxygen service
Bei Sauerstoffeinsatz/
123

Identification Cerabar M, Deltabar M, Deltapilot M
10 Endress+Hauser
Stainless steel housing, hygienic
A0030021
Fig. 3: Nameplate for Cerabar M and Deltapilot M
1 Device name
2 Order code (for re-orders)
3 Serial number (for identification)
4 Extended order code (complete)
5 Nominal measuring range
6 MWP (maximum working pressure)
7Lengthdata
8 Electronic version (output signal)
9 Supply voltage
10 Min./max. span
11 Wetted materials
12 Approval-specific information
13 ID number of notified body with regard to ATEX (optional)
14 ID number of notified body with regard to Pressure Equipment Directive (optional)
15 Approvals
16 Software version
17 Device version
18 Degree of protection
Devices with certificates are fitted with an additional plate.
A0030024
Fig. 4: Additional nameplate for devices with certificates
1 Approval-specific information
3.2.2 Identifying the sensor type
In the case of gauge pressure sensors, the "Pos. zero adjust" parameter appears in the
operating menu ("Setup" -> "Pos. zero adjust").
In the case of absolute pressure sensors, the "Calib. offset" parameter appears in the
operating menu ("Setup" -> "Calib. offset").
002757-A
p
Order code:
Ext. order code:
Ser. no.:
MWP
D-79689 Maulburg
Made in Germany,
ex works FW
U=
Dev.Rev.:
L=
Span
Mat.:
002758-C
1
2
34
44
56
789
10
11
12
13
14 15
16
17
18
12
002759-B
1
1

Cerabar M, Deltabar M, Deltapilot M Identification
Endress+Hauser 11
3.3 Scope of delivery
The scope of delivery comprises:
• Device
• Optional accessories
Documentation supplied:
• Operating Instruction BA00382P is available on the Internet.
See: www.endress.com Download
• Brief Operating Instruction: KA01030P Cerabar M / KA01027P Deltabar M / KA01033P
Deltapilot M
• Final inspection report
• Additional Safety Instructions for ATEX, IECEx and NEPSI devices
• Optional: factory calibration form, test certificates
3.4 CE mark, Declaration of Conformity
The devices are designed to meet state-of-the-art safety requirements, have been tested and
left the factory in a condition in which they are safe to operate. The devices comply with the
applicable standards and regulations as listed in the EC Declaration of Conformity and thus
comply with the statutory requirements of the EC Directives. Endress+Hauser confirms the
conformity of the device by affixing to it the CE mark.

Installation Cerabar M, Deltabar M, Deltapilot M
12 Endress+Hauser
4Installation
4.1 Incoming acceptance
• Check the packaging and the contents for damage.
• Check the shipment, make sure nothing is missing and that the scope of supply matches
your order.
4.2 Storage and transport
4.2.1 Storage
The device must be stored in a dry, clean area and protected against damage from impact
(EN 837-2).
Storage temperature range:
See Technical Information for Cerabar M TI00436P / Deltabar M TI00434P / Deltapilot M
TI00437P.
4.2.2 Transport
WARNING
!
Incorrect transportation
Housing, diaphragm and capillaries 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).
‣Do not use capillaries as a carrying aid for the diaphragm seals.
4.3 Installation conditions
4.3.1 Dimensions
For dimensions, please refer to the Technical Information for Cerabar M TI00436P /
Deltabar M TI00434P / Deltapilot M TI00437P, "Mechanical construction" section.

Cerabar M, Deltabar M, Deltapilot M Installation
Endress+Hauser 13
4.4 General installation instructions
• Devices with a G 1 1/2 thread:
When screwing the device into the tank, the flat seal has to be positioned on the sealing
surface
of the process connection. To avoid additional strain on the process isolating diaphragm,
the thread should never be sealed with hemp or similar materials.
• Devices with NPT threads:
– Wrap Teflon tape around the thread to seal it.
– Tighten the device at the hexagonal bolt only. Do not turn at the housing.
– Do not overtighten the thread when screwing. Max. torque: 20 to 30 Nm (14.75 to
22.13 lbf ft)
4.4.1 Mounting sensor modules with PVDF thread
WARNING
!
Risk of damage to process connection!
Risk of injury!
‣Sensor modules with PVDF process connections with threaded connection must be
installed with the mounting bracket provided!
WARNING
!
Material fatigue from pressure and temperature!
Risk of injury if parts burst! The thread can become loose if exposed to high pressure and
temperatures.
‣The integrity of the thread must be checked regularly and the thread may need to be re-
tightened with the maximum tightening torque of 7 Nm (5.16 lbf ft). Teflon tape is
recommended for sealing the ½" NPT thread.

Installation Cerabar M, Deltabar M, Deltapilot M
14 Endress+Hauser
4.5 Installing Cerabar M
• Due to the orientation of the Cerabar M, there may be a shift in the zero point, i.e. when
the container is empty or partially full, the measured value does not display zero. You can
correct this zero point shift ä47, Section "Function of the operating elements" or
ä64, Section 8.4 "Position zero adjustment".
• For PMP55, please refer to Section 4.5.2 "Installation instructions for devices with
diaphragm seals – PMP55", ä17.
• Endress+Hauser offers a mounting bracket for installing on pipes or walls.
ä21, Section 4.5.5 "Wall and pipe mounting (optional)".
4.5.1 Installation instructions for devices without diaphragm seals –
PMP51, PMC51
NOTICE
Damage to the device!
If a heated Cerabar M is cooled during the cleaning process (e.g. by cold water), a vacuum
develops for a short time, whereby moisture can penetrate the sensor through the pressure
compensation (1).
‣If this is the case, mount the Cerabar M with the pressure compensation (1) pointing
downwards.
• Keep the pressure compensation and GORE-TEX®filter (1) free from contamination.
• Cerabar M transmitters without diaphragm seals are mounted as per the norms for a
manometer (DIN EN 837-2). We recommend the use of shutoff devices and siphons. The
orientation depends on the measuring application.
• Do not clean or touch process isolating diaphragms with hard or pointed objects.
• The device must be installed as follows in order to comply with the cleanability
requirements of the ASME-BPE (Part SD Cleanability):
1
1
1

Cerabar M, Deltabar M, Deltapilot M Installation
Endress+Hauser 15
Pressure measurement in gases
A0028473
Fig. 5: Measuring arrangement for pressure measurement in gases
1 Cerabar M
2Shutoffdevice
Mount the Cerabar M with the shutoff device above the tapping point so that any condensate
can flow into the process.
Pressure measurement in steams
A0028474
Fig. 6: Measuring arrangement for pressure measurement in steams
1 Cerabar M
2Shutoffdevice
3 U-shaped siphon
4 Circular siphon
• Mount Cerabar M with siphon above the tapping point.
• Fill the siphon with liquid before commissioning.
The siphon reduces the temperature to almost the ambient temperature.
1
2
1
1
2
2
3
4

Installation Cerabar M, Deltabar M, Deltapilot M
16 Endress+Hauser
Pressure measurement in liquids
A0028491
Fig. 7: Measuring arrangement for pressure measurement in liquids
1 Cerabar M
2 Shutoff device
• Mount Cerabar M with shutoff device below or at the same level as the tapping point.
Level measurement
A0028492
Fig. 8: Measuring arrangement for level
• Always install the Cerabar M below the lowest measuring point.
• Do not mount the device in the filling curtain or at a point in the tank which could be
affected by pressure pulses from an agitator.
• Do not mount the device in the suction area of a pump.
• The calibration and functional test can be carried out more easily if you mount the device
downstream of a shutoff device.
1
2
3

Cerabar M, Deltabar M, Deltapilot M Installation
Endress+Hauser 17
4.5.2 Installation instructions for devices with diaphragm seals –
PMP55
• Cerabar M devices with diaphragm seals are screwed in, flanged or clamped, depending on
the type of diaphragm seal.
• 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 isolating diaphragm of the diaphragm seal with hard or
pointed objects.
• Do not remove process isolating diaphragm protection until shortly before installation.
NOTICE
Improper handling!
Damage to the device!
‣A diaphragm seal and the pressure transmitter together form a closed, oil-filled
calibrated system. The fill fluid hole is sealed and may not be opened.
‣When using a mounting bracket, sufficient strain relief must be ensured for the
capillaries in order to prevent the capillary bending down (bending radius 100
(3.94 in)).
‣Please observe the application limits of the diaphragm seal filling oil as detailed in the
Technical Information for Cerabar M TI00436P, "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:
‣Vibration-free (in order to avoid additional pressure fluctuations)
‣Not in the vicinity of heating or cooling lines
‣Insulate if the ambient temperature is below or above the reference temperature
‣With a bending radius of 100 mm (3.94 in).
‣Do not use the capillaries as a carrying aid for the diaphragm seals!

Installation Cerabar M, Deltabar M, Deltapilot M
18 Endress+Hauser
Vacuum application
For applications under vacuum, Endress+Hauser recommends mounting the pressure
transmitter below the diaphragm seal. This prevents vacuum loading of the diaphragm seal
caused by the presence of fill fluid in the capillary.
When the pressure transmitter is mounted above the diaphragm seal, the maximum height
difference H1 in accordance with the illustrations below must not be exceeded.
A0023994
Fig. 9: Installation above the lower diaphragm seal
The maximum height difference depends on the density of the filling oil and the smallest
ever pressure that is permitted to occur at the diaphragm seal (empty vessel), see illustration
below:
A0023986-en
Fig. 10: Diagram of maximum installation height above the lower diaphragm seal for vacuum applications depending on the
pressure at the diaphragm seal on the positive side
A Height difference H1
B Pressure at diaphragm seal
1 Low temperature oil
2 Vegetable oil
3 Silicone oil
4 High-temperature oil
5Inertoil
H1
1
2
3
4
5
A
B
0.0
2.0
4.0
6.0
8.0
10.0
12.0
50 100 300 400 500 600 700 800 900 1000200
[mbarabs]
[m]

Cerabar M, Deltabar M, Deltapilot M Installation
Endress+Hauser 19
Mounting with temperature isolator
Endress+Hauser recommends the use of temperature isolators in the event of constant
extreme medium temperatures which lead to the maximum permissible electronics
temperature of +85 °C (+185°F) being exceeded.
Depending on the filling oil used, diaphragm seal systems with temperature isolators can be
used for maximum temperatures of up to 400 °C (+752 °F). For the temperature
application limits, see technical Information, "Diaphragm seal filling oils" section.
To minimize the influence of rising heat, Endress+Hauser recommends the device be
mounted horizontally or with the housing pointing downwards. The additional installation
height also brings about a maximum zero point shift of 21 mbar (0.315 psi) due to the
hydrostatic column in the temperature isolator. You can correct this zero point shift at the
device.
The temperature restrictions are lowest with an insulation height of 30 mm (1.18 inch).
Full insulation exhibits virtually the same behavior as no insulation!
The temperature limits with an insulation height of 30 mm (1.18 inch) are illustrated in the
following graphic.
A0031354
Fig. 11:
A Ambient temperature:
 85 °C (185 °F)
B Process temperature: max. 400 °C (752 °F), depending on the filling oil used
C Device with temperature isolator, material 316L (1.4404)
D Without isolation
E Maximum isolation
F 30 mm (1.18. inch) isolation
G Without isolation, maximum isolation, 30 mm (1.18. inch) isolation
1 Isolation heigth 30 mm (1.18. inch)
2Isolationmaterial
Tp
Ta
+212
+176+140+104+68+32-4-40-76
+400
+350
+300
+250
+200
+150
+100
+50
0
-50
-100
+752
+662
+572
+482
+392
+302
+212
+122
+32
-58
-148 [°C]
[°F]
[°C][°F]
+100+80+60+40+20
0
-20-40-60
A
B
1
2
A
DE FG
C
B

Installation Cerabar M, Deltabar M, Deltapilot M
20 Endress+Hauser
4.5.3 Seal for flange mounting
NOTICE
Corrupted measurement results.
The seal is not allowed to press against the process isolating diaphragm as this could affect
the measurement result.
‣Ensure that the seal is not touching the process isolating diaphragm.
A0017743
Fig. 12:
1 Process isolating diaphragm
2Seal
4.5.4 Thermal insulation – PMP55
The PMP55 may only be insulated up to a certain height. The maximum permitted
insulation height is indicated on the devices and applies to an insulation material with a heat
conductivity 0.04 W/(m x K) and to the maximum permitted ambient and process
temperature. The data were determined under the most critical application "quiescent air".
A0020474
Fig. 13: Maximum permitted insulation height, here indicated on a PMP55 with a flange
A Ambient temperature:
 70 °C (158°F)
B Process temperature: max. 400 °C (752°F), depending on the diaphragm seal filling oil used
1 Maximum permitted insulation height
2 Insulation material
12
A
B
12