Endress+Hauser Cerabar M User manual

Products Solutions Services
Operating Instructions
Cerabar M, Deltapilot M
Pressure / hydrostatics
Deltapilot M
Cerabar M
BA02136P/00/EN/01.21
71536626
2021-07-31
Valid as of version
01.00.zz

Cerabar M, Deltapilot M
2 Endress+Hauser
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
• 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 this
manual.

Cerabar M, Deltapilot M Table of contents
Endress+Hauser 3
Table of contents
1 About this document ................ 5
1.1 Document function ..................... 5
1.2 Symbols used .......................... 5
1.3 Terms and abbreviations ................. 7
1.4 Turn down calculation ................... 8
1.5 Registered trademarks ................... 8
2 Basic safety instructions ............ 9
2.1 Requirements for personnel ............... 9
2.2 Designated use ........................ 9
2.3 Workplace safety ....................... 9
2.4 Operational safety ...................... 9
2.5 Product safety ........................ 10
3 Incoming acceptance and product
identification ..................... 11
3.1 Incoming acceptance ................... 11
3.2 Product identification ................... 11
3.3 Nameplate ........................... 12
3.4 Identifying the sensor type ............... 13
3.5 Storage and transport .................. 13
3.6 Scope of delivery ...................... 14
4 Installation ....................... 15
4.1 Installation conditions .................. 15
4.2 General installation instructions ........... 15
4.3 Mounting sensor modules with PVDF thread .15
4.4 Installing the Cerabar M ................. 16
4.5 Installing the Deltapilot M ............... 26
4.6 Mounting of the profile seal for universal
process mounting adapter ............... 29
4.7 Closing the housing cover ................ 30
4.8 Post-installation check .................. 30
5 Electrical connection .............. 31
5.1 Connecting the device .................. 31
5.2 Connecting the measuring unit ............ 31
5.3 Terminals ........................... 32
5.4 Cable specification ..................... 32
5.5 Load for current output ................. 32
5.6 Field Xpert SMT70, SMT77 .............. 32
5.7 FieldPort SFP20 ....................... 33
5.8 Post-connection check .................. 33
6 Operation ......................... 34
6.1 Operation methods .................... 34
6.2 Operation without an operating menu ...... 35
6.3 Operation with an operating menu ......... 36
6.4 Operation with device display (optional) ..... 37
6.5 Operation using Endress+Hauser operating
program ............................ 41
6.6 Locking/unlocking operation ............. 41
6.7 Resetting to factory settings (reset) ........ 42
7 System integration ................ 43
7.1 Process data ......................... 43
7.2 Reading out and writing device data (ISDU –
Indexed Service Data Unit) ............... 43
8 Commissioning .................... 48
8.1 Function check ....................... 48
8.2 Unlocking/locking configuration .......... 48
8.3 Commissioning without an operating menu .. 49
8.4 Commissioning with an operating menu .... 51
8.5 Configuring level measurement ........... 53
8.6 Configuring pressure measurement ........ 57
8.7 Backing up or duplicating the device data .... 59
9 Maintenance ...................... 60
9.1 Information on cleaning ................. 60
9.2 Exterior cleaning ...................... 60
10 Diagnostics and troubleshooting ... 61
10.1 Diagnostic events ...................... 61
10.2 Behavior of the current output in the event of
an error ............................. 64
10.3 Locking/unlocking operation ............. 64
10.4 Resetting to factory settings (reset) ........ 65
10.5 Software history ...................... 65
11 Repair ............................ 67
11.1 General information ................... 67
11.2 Spare parts .......................... 67
11.3 Return .............................. 68
11.4 Disposal ............................ 68
12 Overview of the operating menu .... 69
13 Description of device parameters ... 71
13.1 Expert → System ...................... 71
13.2 Expert → System → Instrument info ........ 71
13.3 Expert → System → Display ............... 73
13.4 Expert → System → Management .......... 73
13.5 Expert → Measurement ................. 74
13.6 Expert → Measurement → Basic setup ....... 74
13.7 Expert → Measurement → Pressure ........ 76
13.8 Expert → Measurement → Level ........... 78
13.9 Expert → Measurement → Sensor limits ..... 80
13.10 Expert → Measurement → Sensor trim ...... 80
13.11 Expert → Output → Current output ......... 81
13.12 Expert → Communication ................ 84
13.13 Expert → Diagnosis .................... 84

Table of contents Cerabar M, Deltapilot M
4 Endress+Hauser
13.14 Expert → Diagnosis → Diagnostic list ........ 86
13.15 Expert → Diagnosis → Event logbook ....... 86
13.16 Expert → Diagnosis → Simulation .......... 86
13.17 Backing up or duplicating the device data .... 88
14 Technical data .................... 89
14.1 Pressure specifications .................. 89
14.2 Additional technical data ................ 89
Index .................................. 90

Cerabar M, Deltapilot M About this document
Endress+Hauser 5
1 About this document
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 stor-
age, to mounting, connection, operation and commissioning through to troubleshooting,
maintenance and disposal.
1.2 Symbols used
1.2.1 Safety symbols
Symbol Meaning
DANGER
DANGER!
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
seriousor fatal injury.
WARNING
WARNING!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
seriousor fatal injury.
CAUTION
CAUTION!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
minoror medium injury.
NOTICE
NOTICE!
This symbol contains information on procedures and other facts which do not result in per-
sonalinjury.
1.2.2 Electrical symbols
Symbol Meaning Symbol Meaning
Protective ground connection
A terminal which must be connected
to ground prior to establishing any
other connections.
Ground connection
A grounded terminal which, as far as
the operator is concerned, is groun-
ded via a grounding system.
1.2.3 Tool symbols
Symbol Meaning
A0011221
Allen key
A0011222
Open-ended wrench
1.2.4 Symbols for certain types of information
Symbol Meaning
Permitted
Procedures, processes or actions that are permitted.
Preferred
Procedures, processes or actions that are preferred.

About this document Cerabar M, Deltapilot M
6 Endress+Hauser
Symbol Meaning
Forbidden
Procedures, processes or actions that are forbidden.
Tip
Indicates additional information.
Reference to documentation
A
Reference to page
Reference to graphic
Visual inspection
1.2.5 Symbols in graphics
Symbol Meaning
1, 2, 3 ... Item numbers
,… ,
1. 2. 3.
Series of steps
A, B, C, ... Views
A-A, B-B, C-C, ... Sections
1.2.6 Symbols at the device
Symbol Meaning
A0019159
Safety instructions
Observe the safety instructions contained in the associated Operating Instructions.
t 85°C>
A0029423
Connecting cable immunity to temperature change
Indicates that the connecting cables have to withstand a temperature of 85°C at least.

Cerabar M, Deltapilot M About this document
Endress+Hauser 7
1.3 Terms and abbreviations
URL OPLMWP
LRL
0
p
LRV URV
1
2
3
4
A0029505
Item Term/abbrevia-
tion
Explanation
1 OPL OPL: The OPL (over pressure limit = sensor overload limit) for the measuring device depends on the lowest-rated ele-
ment, with regard to pressure, of the selected components, i.e., the process connection has to be taken into consideration
in addition to the measuring cell. Observe pressure-temperature dependency.
2 MWP MWP: The MWP (maximum working pressure) for the sensors depends on the lowest-rated element, with regard to
pressure, of the selected components, i.e., the process connection has to be taken into consideration in addition to the
measuring cell. Observe pressure-temperature dependency. The MWP may be applied at the device for an unlimited
period of time. The MWP can be found on the nameplate.
3 Maximum sensor
measuring range
Span between LRL and URL
This sensor measuring range is equivalent to the maximum calibratable/adjustable span.
4 Calibrated/adjusted
span
Span between LRV and URV
Factory setting: 0 to URL
Other calibrated spans can be ordered as customized spans.
p - Pressure
- LRL Lower range limit
- URL Upper range limit
- LRV Lower range value
- URV Upper range value
- TD (Turn down) Turn down
Example - see the following section.

About this document Cerabar M, Deltapilot M
8 Endress+Hauser
1.4 Turn down calculation
LRV URLURV LRL
1 = 2 3
A0029545
1 Calibrated/adjusted span
2 Zero point-based span
3 Upper range limit
Example
• Sensor: 10 bar (150 psi)
• Upper range limit (URL) = 10 bar (150 psi)
Turn down (TD):
• Calibrated/adjusted span: 0 to 5 bar (0 to 75 psi)
• Lower range value (LRV) = 0 bar (0 psi)
• Upper range value (URV) = 5 bar (75 psi)
TD = URL
|URV - LRV|
TD = 10 bar (150 psi) = 2
|5 bar (75 psi) - 0 bar (0 psi)|
In this example, the TD is 2:1.
This span is based on the zero point.
1.5 Registered trademarks
• KALREZ®
Registered label of E.I. Du Pont de Nemours & Co., Wilmington, USA
• TRI-CLAMP®
Registered label of Ladish & Co., Inc., Kenosha, USA
•
Registered trademark of the IO-Link Community.
• GORE-TEX® trademark of W.L. Gore & Associates, Inc., USA

Cerabar M, Deltapilot M Basic safety instructions
Endress+Hauser 9
2 Basic safety instructions
2.1 Requirements for personnel
The personnel for installation, commissioning, diagnostics and maintenance must meet
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 starting work, read and understand the instructions in the manual and supple-
mentary documentation as well as the certificates (depending on the application)
‣Follow instructions and comply with basic conditions
The operating personnel must meet the following requirements:
‣Operating personnel are instructed and authorized according to the requirements of
the task by the facility's owner-operator
‣Follow the instructions in this manual
2.2 Designated use
The Cerabar M is a pressure transmitter for measuring level and pressure.
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 regula-
tions.
‣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.
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:
‣Carry out repairs on the device only if they are expressly permitted.
‣Observe federal/national regulations pertaining to repair of an electrical device.

Basic safety instructions Cerabar M, Deltapilot M
10 Endress+Hauser
‣Use original spare parts and accessories from Endress+Hauser only.
Hazardous area
To eliminate a danger for persons or for the facility when the device is used in the hazard-
ous area (e.g. explosion protection, pressure vessel safety):
‣Based on the nameplate, check whether the ordered device is permitted for the inten-
ded use in the hazardous area.
‣Observe the specifications in the separate supplementary documentation that is an
integral part of these Instructions.
2.5 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 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 con-
firms this fact by applying the CE mark.

Cerabar M, Deltapilot M Incoming acceptance and product identification
Endress+Hauser 11
3 Incoming acceptance and product
identification
3.1 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) present?
If one of these conditions is not fulfilled, please contact your Endress+Hauser sales
office.
3.2 Product identification
The following options are available to identify the measuring device:
• Nameplate specifications
• Order code with breakdown of the device features on the delivery note
• Enter the serial numbers from the nameplates in W@M Device Viewer
(www.endress.com/deviceviewer): all the information about the device is displayed.
For an overview of the technical documentation provided, enter the serial number from
the nameplates in W@M Device Viewer (www.endress.com/deviceviewer)
3.2.1 Manufacturer address
Endress+Hauser SE+Co. KG
Hauptstraße 1
79689 Maulburg, Germany
Place of manufacture: See nameplate.

Incoming acceptance and product identification Cerabar M, Deltapilot M
12 Endress+Hauser
3.3 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 (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.)
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 (The equation does not apply for PMP51 and PMP55 with a 40 bar (600 psi) or a
100 bar (1500 psi) measuring cell).
• The Pressure Equipment Directive (2014/68/EU) uses the abbreviation "PS". The abbrevi-
ation "PS" corresponds to the MWP (maximum working pressure) of the measuring
device.
3.3.1 Aluminum housing
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=
1
23
4
5 6 7
8 9 10
11
12
13 14
15
16
17
18
18
A0030017
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)
7 Min./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 Software version
15 Device version
16 Degree of protection
17 Wetted materials
18 Approval-specific information
Devices suitable for oxygen applications are fitted with an additional nameplate.
Pmax
Tmax
for oxygen service
Bei Sauerstoffeinsatz/
1
23
A0030019
1 Maximum pressure for oxygen applications
2 Maximum temperature for oxygen applications
3 Layout identification of the nameplate

Cerabar M, Deltapilot M Incoming acceptance and product identification
Endress+Hauser 13
3.3.2 Stainless steel housing, hygienic
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
3
4
4
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
12
A0030021
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)
7 Length data
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.
002759-B
1
1
A0030024
1 Approval-specific information
3.4 Identifying the sensor type
In the case of gauge pressure sensors, the "Pos. zero adjust" parameter appears in the oper-
ating menu ("Setup" -> "Pos. zero adjust").
In the case of absolute pressure sensors, the "Calib. offset" parameter appears in the oper-
ating menu ("Setup" -> "Calib. offset").
3.5 Storage and transport
3.5.1 Storage conditions
Use original packaging.
Store the measuring device in clean and dry conditions and protect from damage caused by
shocks (EN 837-2).

Incoming acceptance and product identification Cerabar M, Deltapilot M
14 Endress+Hauser
Storage temperature range
See the Technical Information for Cerabar M TI00436P / Deltapilot M TI00437P.
3.5.2 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).
‣Do not use capillaries as a carrying aid for the diaphragm seals.
3.6 Scope of delivery
The scope of delivery comprises:
• Device
• Optional accessories
Accompanying documentation:
• Operating Instructions BA02136P is available on the Internet. See: www.de.endress.com
→ Download
• Brief Operating Instructions: KA01522P Cerabar M / KA01523P Deltapilot M
• Final inspection report
• Additional Safety Instructions for ATEX, IECEx and NEPSI devices
• Optional: factory calibration certificate, inspection certificates

Cerabar M, Deltapilot M Installation
Endress+Hauser 15
4 Installation
4.1 Installation conditions
4.1.1 Dimensions
Dimensions → see the Technical Information for Cerabar M TI00436P / Deltapilot M
TI00437P, "Mechanical construction" section.
4.2 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 dia-
phragm, 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)
• For the following process connections a tightening torque of max. 40 Nm (29.50 lbf ft)
is required:
• Thread ISO228 G1/2 (Order option "GRC" or "GRJ" or "G0J")
• Thread DIN13 M20 x 1.5 (Order option "G7J" or "G8J")
4.3 Mounting sensor modules with PVDF thread
LWARNING
Risk of damage to process connection!
Risk of injury!
‣Sensor modules with PVDF thread must be installed with the mounting bracket provi-
ded!
LWARNING
Material fatigue from pressure and temperature!
Risk of injury if parts burst! The thread can become lose if exposed to high pressure and
temperature loads.
‣The integrity of the thread must be checked regularly. Also, 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, Deltapilot M
16 Endress+Hauser
4.4 Installing the 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→  36"Funktion der Bedienelemente".
• The local display can be rotated in 90° stages.
• For PMP55, please refer to Section "Installation instructions for devices with diaphragm
seals – PMP55"→  19.
• Endress+Hauser offers a mounting bracket for installing on pipes or walls.→  23,
Section "Wall and pipe mounting (optional)".
4.4.1 Installation instructions for devices without diaphragm seals –
PMP51, PMC51
NOTICE
Damage to the device!
If a heated device is cooled during a cleaning process (e.g. by cold water), a vacuum devel-
ops for a short time and, as a result, moisture can enter the sensor through the pressure
compensation element (1).
‣Mount the device with the pressure compensation element (1) pointing diagonally
downwards or to the side as much possible.
1
1
1
1
A0028471
• 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 membranes with hard or pointed objects.
• The device must be installed as follows in order to comply with the cleanability require-
ments of the ASME-BPE (Part SD Cleanability):
A0028472

Cerabar M, Deltapilot M Installation
Endress+Hauser 17
Pressure measurement in gases
1
2
A0028473
1 Cerabar M
2 Shutoff device
Mount the Cerabar M with the shutoff device above the tapping point so that any conden-
sate can flow into the process.
Pressure measurement in vapors
1
1
2
2
3
4
A0028474
1 Cerabar M
2 Shutoff device
3 U-shaped siphon
4 Circular siphon
• Mount the Cerabar M with the siphon below the tapping point.
• Fill the siphon with liquid before commissioning. The siphon reduces the temperature to
almost ambient temperature.

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

Cerabar M, Deltapilot M Installation
Endress+Hauser 19
4.4.2 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 membrane of the diaphragm seal with hard or pointed
objects.
• Do not remove the protection on the process membrane until just before installation.
NOTICE
Improper handling!
Damage to the device!
‣A diaphragm seal and the pressure transmitter together form a closed, oil-filled cali-
brated system. The fill fluid hole is sealed and may 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 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
‣Mount with a bending radius ≥ 100 mm (3.94 in)!
‣Do not use the capillaries as a carrying aid for the diaphragm seals!
Vacuum applications
Installation instructions
For vacuum applications, pressure transmitters with a ceramic measuring membrane (oil-
free) are preferable.
For applications under vacuum, Endress+Hauser recommends mounting the pressure
transmitter below the diaphragm seal. This prevents a vacuum load on 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 following illustrations must not be exceeded.
The following illustration shows installation above the lower diaphragm seal:
H1
A0023994

Installation Cerabar M, Deltapilot M
20 Endress+Hauser
The maximum height difference depends on the density of the fill fluid and the lowest
pressure that is permitted to occur at the diaphragm seal (empty tank). See illustration
below. The following diagram shows the maximum installation height above the lower
diaphragm seal for vacuum applications.
1
2
3
4
5
A
B
0.0
6.6
13
20
26
33
39
1 1.45 4.35 6 7.25 9 10.15 12 13.05 14.53
[psi ]
abs
[ft]
A0023986-EN
A Height difference H1
B Pressure at diaphragm seal
1 Low-temperature oil
2 Vegetable oil
3 Silicone oil
4 High-temperature oil
5 Inert oil
Mounting with temperature isolator
Endress+Hauser recommends the use of temperature isolators in the event of constant
extreme medium temperatures which cause the maximum permissible electronics temper-
ature of +85 °C (+185 °F) to be exceeded. Depending on the fill fluid used, diaphragm seal
systems with temperature isolators can be used for maximum temperatures of up to
+400 °C (+752 °F) , see Technical Information, section "Diaphragm seal fill fluids". To mini-
mize 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 zero point shift of maximum 21 mbar (0.315 psi) due to the hydro-
static column in the temperature isolator. You can correct this zero point shift at the
device.