Siemens SITRANS 7MF03.0 Administrator guide

SITRANS
Pressure transmitter
SITRANS P320/P420 (mA/HART)
Compact Operating Instructions
7MF03.0
7MF04.0
06/2018
A5E38874562-AA
Introduction 1
Safety instructions 2
Installing/mounting 3
Connecting 4
Commissioning 5
Service and maintenance 6
Technical data 7
Appendix A 8

Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will be
used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property
damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions. Qualified
personnel are those who, based on their training and experience, are capable of identifying risks and avoiding
potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended or
approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software described.
Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in
this publication is reviewed regularly and any necessary corrections are included in subsequent editions.
Siemens AG
Division Process Industries and Drives
Postfach 48 48
90026 NÜRNBERG
GERMANY
Document order number: A5E38874562
Ⓟ 05/2018 Subject to change
Copyright © Siemens AG 2018.
All rights reserved

Table of contents
1 Introduction...................................................................................................................................................7
1.1 Purpose of this documentation.................................................................................................7
1.2 Document history.....................................................................................................................7
1.3 Scope of validity of this document............................................................................................7
1.4 Intended use............................................................................................................................8
1.5 Product compatibility................................................................................................................8
1.6 Nameplate layout.....................................................................................................................9
1.7 Checking the consignment.....................................................................................................11
1.8 Security information...............................................................................................................11
1.9 Transportation and storage....................................................................................................12
1.10 Notes on warranty..................................................................................................................12
2 Safety instructions......................................................................................................................................13
2.1 Precondition for use...............................................................................................................13
2.1.1 Warning symbols on the device.............................................................................................13
2.1.2 Laws and directives................................................................................................................13
2.1.3 Conformity with European directives......................................................................................14
2.2 Requirements for special applications...................................................................................14
2.3 Use in hazardous areas.........................................................................................................15
3 Installing/mounting......................................................................................................................................17
3.1 Basic safety instructions.........................................................................................................17
3.1.1 Installation location requirements...........................................................................................19
3.1.1.1 Devices with marine approval................................................................................................20
3.1.2 Proper mounting.....................................................................................................................20
3.2 Installation (except level)........................................................................................................21
3.2.1 Installation configuration........................................................................................................21
3.2.2 Installation (except level)........................................................................................................22
3.2.3 Fastening with the mounting bracket.....................................................................................22
3.3 Installation (level)...................................................................................................................24
3.3.1 Mounting on the container......................................................................................................25
3.4 Removing...............................................................................................................................28
4 Connecting.................................................................................................................................................29
4.1 Basic safety instructions.........................................................................................................29
4.2 Connecting the device............................................................................................................32
4.2.1 Opening the device................................................................................................................32
4.2.2 Connecting the device............................................................................................................33
SITRANS P320/P420 (mA/HART)
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4.2.3 Closing the device..................................................................................................................34
5 Commissioning...........................................................................................................................................37
5.1 Basic safety instructions.........................................................................................................37
5.2 Switching on the supply voltage.............................................................................................38
5.3 Commissioning the device.....................................................................................................39
5.4 gauge pressure, absolute pressure from the differential pressure series and absolute
pressure from the gauge pressure series..............................................................................39
5.4.1 Commissioning for gases.......................................................................................................39
5.4.2 Commissioning with steam or liquid.......................................................................................41
5.5 Differential pressure and flow rate.........................................................................................42
5.5.1 Commissioning in gaseous environments..............................................................................42
5.5.2 Commissioning for liquids......................................................................................................44
5.5.3 Commissioning with vapor.....................................................................................................45
6 Service and maintenance...........................................................................................................................49
6.1 Basic safety instructions.........................................................................................................49
6.2 Cleaning.................................................................................................................................50
6.2.1 Cleaning the enclosure..........................................................................................................50
6.2.2 Servicing the remote seal measuring system........................................................................50
6.3 Maintenance and repair work.................................................................................................50
6.3.1 Defining the maintenance interval..........................................................................................51
6.3.2 Checking the gaskets.............................................................................................................52
6.3.3 Diagnostics messages...........................................................................................................53
6.4 Return procedure...................................................................................................................53
6.5 Disposal.................................................................................................................................54
7 Technical data............................................................................................................................................55
7.1 Input.......................................................................................................................................55
7.1.1 Gauge pressure.....................................................................................................................55
7.1.2 Gauge pressure with front-flush diaphragm...........................................................................56
7.1.3 Gauge pressure from the differential pressure series............................................................57
7.1.4 Absolute pressure from the gauge pressure series...............................................................58
7.1.5 Absolute pressure with front-flush diaphragm........................................................................59
7.1.6 Absolute pressure from the differential pressure series.........................................................60
7.1.7 Differential pressure and flow.................................................................................................61
7.1.8 Level.......................................................................................................................................62
7.2 Measuring accuracy of SITRANS P320.................................................................................63
7.2.1 Reference conditions.............................................................................................................63
7.2.2 Effect of auxiliary power supply..............................................................................................63
7.2.3 Gauge pressure.....................................................................................................................63
7.2.4 Gauge pressure from the differential pressure series............................................................65
7.2.5 Absolute pressure from gauge and differential pressure series.............................................66
7.2.6 Absolute pressure with front-flush diaphragm........................................................................67
7.2.7 Gauge pressure with front-flush diaphragm...........................................................................68
7.2.8 Differential pressure and flow.................................................................................................69
7.2.9 Level.......................................................................................................................................72
Table of contents
SITRANS P320/P420 (mA/HART)
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7.3 Measuring accuracy of SITRANS P420.................................................................................73
7.3.1 Reference conditions.............................................................................................................73
7.3.2 Effect of auxiliary power supply..............................................................................................73
7.3.3 Gauge pressure.....................................................................................................................73
7.3.4 Gauge pressure from the differential pressure series ...........................................................74
7.3.5 Absolute pressure from gauge and differential pressure series.............................................76
7.3.6 Absolute pressure with front-flush diaphragm........................................................................77
7.3.7 Gauge pressure with front-flush diaphragm...........................................................................78
7.3.8 Differential pressure and flow.................................................................................................78
7.3.9 Level.......................................................................................................................................82
7.4 Operating conditions..............................................................................................................83
7.5 Vibration resistance................................................................................................................87
7.6 Construction...........................................................................................................................89
7.7 Torques..................................................................................................................................93
7.8 Display, keyboard and auxiliary power...................................................................................93
7.9 Certificates and approvals......................................................................................................94
8 Appendix A.................................................................................................................................................97
8.1 Technical support...................................................................................................................97
8.2 Certificates.............................................................................................................................98
Index...........................................................................................................................................................99
Table of contents
SITRANS P320/P420 (mA/HART)
Compact Operating Instructions, 06/2018, A5E38874562-AA 5

Table of contents
SITRANS P320/P420 (mA/HART)
6Compact Operating Instructions, 06/2018, A5E38874562-AA

Introduction 1
1.1 Purpose of this documentation
These instructions are a brief summary of important features, functions and safety information,
and contain all information required for safe use of the device. Read the instructions carefully
prior to installation and commissioning. In order to use the device correctly, first review its
principle of operation.
The instructions are aimed at persons who install and commission the device.
To realize optimum performance from the device, read the complete operating instructions.
See also
Instructions and manuals (http://www.siemens.com/processinstrumentation/documentation)
1.2 Document history
The overview below summarizes the most important changes in the documentation when
compared to the previous edition.
Edition Note
06/2018 First edition
1.3 Scope of validity of this document
Variant SITRANS P320 mA/HART SITRANS P420 mA/HART
Gauge pressure 7MF0300 7MF0400
Gauge pressure from the differential
pressure series
7MF0310 7MF0410
Absolute pressure from the gauge pres‐
sure series
7MF0320 7MF0420
Absolute pressure from the differential
pressure series
7MF0330 7MF0430
Differential pressure and flow rate, PN
32/160 (MAWP 464/2320 psi)
7MF0340 7MF0440
Differential pressure and flow rate, PN
420 (MAWP 6092 psi)
7MF0350 7MF0450
Level 7MF0360 7MF0460
SITRANS P320/P420 (mA/HART)
Compact Operating Instructions, 06/2018, A5E38874562-AA 7

1.4 Intended use
Overview
Depending on the variant, the pressure transmitter measures corrosive, non-corrosive and
hazardous gases, vapors and liquids.
You can use the pressure transmitter for the following measuring tasks:
● Gauge pressure
● Absolute pressure
● Differential pressure
With appropriate configuration and the necessary add-on parts (e.g. limiters and remote seals),
the pressure transmitter can also be used for the following measuring tasks:
● Level
● Volume flow
● Mass flow
● Volume
● Customized characteristic curve
The output signal for all measuring tasks is a direct current of 4 to 20 mA.
You can install the "intrinsically-safe" or "flameproof enclosure" version of the pressure
transmitter in hazardous areas. The devices have a test certification and comply with the
corresponding directives.
Pressure transmitters with remote seals of various shapes can be provided for special
applications. For example, measuring high-viscosity substances is a special application.
Operate the device in accordance with the specifications in section Technical data (Page 55).
1.5 Product compatibility
Edition Comments Product compatibility Compatibility with device integra‐
tion package
06/2018 First edition HART
FW: 1.00.08 or higher
HW: 1.00.00 or higher
Device version 1
SIMATIC PDM V9.0 or higher
AMS Device Manager V13 or high‐
er
DTM Pactware V4.1 SP4
FC475 V3.9 or higher
Introduction
1.5 Product compatibility
SITRANS P320/P420 (mA/HART)
8Compact Operating Instructions, 06/2018, A5E38874562-AA

1.6 Nameplate layout
Nameplate with general information
The nameplate with the article number and other important information, such as design details
and technical data, is located on the cover over the buttons.



①Article number (MLFB number) ⑥Degree of protection
②Serial number ⑦Conformity with country-specific directives
③Materials, connection, diaphragm, O-ring, oil ⑧QR code to the mobile website with device-
specific information
④Minimum/maximum measuring span ⑨Note operating instructions, certificates
and approvals
⑤Nominal pressure ⑩Internal code with information for manufac‐
turer
Figure 1-1 Example
Introduction
1.6 Nameplate layout
SITRANS P320/P420 (mA/HART)
Compact Operating Instructions, 06/2018, A5E38874562-AA 9

Nameplate with approval information
The nameplate with approval information is located on the front of the enclosure.
DEF,,*([LD,,&777*D*EHG
1a Characteristics of the hazardous area
1b Type of protection
1c Group (gas, dust)
1d Maximum surface temperature (temperature class)
1e Device protection level
Figure 1-2 Example
Measuring point label
The measuring point label is fastened with a wire under the front cover.
.... to .... mbar
Long tag (TAG)
Measuring point description
Y01 (max. 5 characters)
Y16 (max. 32 characters)
max. 10 characters
Y99: 1234
<PD[FKDUDFWHUV
Figure 1-3 Example
Introduction
1.6 Nameplate layout
SITRANS P320/P420 (mA/HART)
10 Compact Operating Instructions, 06/2018, A5E38874562-AA

Nameplate with information on the remote seals
The nameplate with information on the remote seals is located on the back of the enclosure.
%&,BSMTSVIF%*"1)3"(.4&"-44"/%8*$)5:1&1.'"""";$$&01&35&.1ާ7"$$6.4&37*$&/0]09:(&/ࣙާࣙCBS/0.*4*;&13&4ܝ&95&/4*0/ܞ$-"44'*--*/(-*26*%'00%(3"%&0*-'%"(3"%&8&55&%."5%*"1)'-"/%61-&94JFNFOT"(4/+"TTFNCMFEJO$BOBEB$PNQPOFOUTPG'SBODF


①Diaphragm remote seals of sandwich type ⑦Nominal diameter/nominal pressure: 4 inch, 50
mm tube length, CLASS 600
②Article number (MLFB number) ⑧Filling liquid: Food grade oil (FDA-compliant)
③Order options ⑨Wetted materials: Diaphragm duplex, 1.4462
④Serial number ⑩QR code for mobile website with device-specific
information
⑤Operating temperature ⑪Assembly and manufacturing location
⑥Vacuum service: No, oxygen ≤ 60 °C; ≤
50 bar
Figure 1-4 Example
1.7 Checking the consignment
1. Check the packaging and the delivered items for visible damages.
2. Report any claims for damages immediately to the shipping company.
3. Retain damaged parts for clarification.
4. Check the scope of delivery by comparing your order to the shipping documents for
correctness and completeness.
WARNING
Using a damaged or incomplete device
Risk of explosion in hazardous areas.
● Do not use damaged or incomplete devices.
1.8 Security information
Siemens provides products and solutions with industrial security functions that support the
secure operation of plants, systems, machines, and networks.
In order to protect plants, systems, machines and networks against cyber threats, it is
necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial
security concept. Siemens’ products and solutions constitute one element of such a concept.
Introduction
1.8 Security information
SITRANS P320/P420 (mA/HART)
Compact Operating Instructions, 06/2018, A5E38874562-AA 11

Customers are responsible for preventing unauthorized access to their plants, systems,
machines and networks. Such systems, machines and components should only be connected
to an enterprise network or the internet if and to the extent such a connection is necessary
and only when appropriate security measures (e.g. firewalls and/or network segmentation) are
in place.
For additional information on industrial security measures that may be implemented, please
visit:
https://www.siemens.com/industrialsecurity
Siemens’ products and solutions undergo continuous development to make them more secure.
Siemens strongly recommends that product updates are applied as soon as they are available
and that the latest product versions are used. Use of product versions that are no longer
supported, and failure to apply the latest updates may increase customer’s exposure to cyber
threats.
To stay informed about product updates, subscribe to the Siemens Industrial Security RSS
Feed under
https://www.siemens.com/industrialsecurity.
1.9 Transportation and storage
To guarantee sufficient protection during transport and storage, observe the following:
● Keep the original packaging for subsequent transportation.
● Devices/replacement parts should be returned in their original packaging.
● If the original packaging is no longer available, ensure that all shipments are properly
packaged to provide sufficient protection during transport. Siemens cannot assume liability
for any costs associated with transportation damages.
NOTICE
Insufficient protection during storage
The packaging only provides limited protection against moisture and infiltration.
● Provide additional packaging as necessary.
Special conditions for storage and transportation of the device are listed in Technical data
(Page 55).
1.10 Notes on warranty
The contents of this manual shall not become part of or modify any prior or existing agreement,
commitment or legal relationship. The sales contract contains all obligations on the part of
Siemens as well as the complete and solely applicable warranty conditions. Any statements
regarding device versions described in the manual do not create new warranties or modify the
existing warranty.
The content reflects the technical status at the time of publishing. Siemens reserves the right
to make technical changes in the course of further development.
Introduction
1.10 Notes on warranty
SITRANS P320/P420 (mA/HART)
12 Compact Operating Instructions, 06/2018, A5E38874562-AA

Safety instructions 2
2.1 Precondition for use
This device left the factory in good working condition. In order to maintain this status and to
ensure safe operation of the device, observe these instructions and all the specifications
relevant to safety.
Observe the information and symbols on the device. Do not remove any information or symbols
from the device. Always keep the information and symbols in a completely legible state.
2.1.1 Warning symbols on the device
Symbol Explanation
Consult operating instructions
2.1.2 Laws and directives
Observe the safety rules, provisions and laws applicable in your country during connection,
assembly and operation. These include, for example:
● National Electrical Code (NEC - NFPA 70) (USA)
● Canadian Electrical Code (CEC) (Canada)
Further provisions for hazardous area applications are for example:
● IEC 60079-14 (international)
● EN 60079-14 (EU)
SITRANS P320/P420 (mA/HART)
Compact Operating Instructions, 06/2018, A5E38874562-AA 13

2.1.3 Conformity with European directives
The CE mark on the device is a sign of conformity with the following European directives:
Electromagnetic compatibility EMC
2014/30/EU
Directive of the European Parliament and of the Council on the harmonization
of the laws of the Member States relating to electromagnetic compatibility
Atmosphère explosible ATEX
2014/34/EU
Directive of the European Parliament and the Council on the harmonization of
the laws of the Member States concerning equipment and protective systems
intended for use in potentially explosive atmospheres
Pressure Equipment Directive
PED
2014/68/EU
Directive of the European Parliament and of the Council on the harmonization
of the laws of the Member States relating to the making available on the market
of pressure equipment
The directives applied can be found in the EU declaration of conformity for the associated
device.
WARNING
Improper device modifications
Risk to personnel, system and environment can result from modifications to the device,
particularly in hazardous areas.
● Only carry out modifications that are described in the instructions for the device. Failure
to observe this requirement cancels the manufacturer's warranty and the product
approvals.
2.2 Requirements for special applications
Due to the large number of possible applications, each detail of the described device versions
for each possible scenario during commissioning, operation, maintenance or operation in
systems cannot be considered in the instructions. If you need additional information not
covered by these instructions, contact your local Siemens office or company representative.
Note
Operation under special ambient conditions
We highly recommend that you contact your Siemens representative or our application
department before you operate the device under special ambient conditions as can be
encountered in nuclear power plants or when the device is used for research and development
purposes.
Safety instructions
2.2 Requirements for special applications
SITRANS P320/P420 (mA/HART)
14 Compact Operating Instructions, 06/2018, A5E38874562-AA

2.3 Use in hazardous areas
Qualified personnel for hazardous area applications
Persons who install, connect, commission, operate, and service the device in a hazardous
area must have the following specific qualifications:
● They are authorized, trained or instructed in operating and maintaining devices and systems
according to the safety regulations for electrical circuits, high pressures, aggressive, and
hazardous media.
● They are authorized, trained, or instructed in carrying out work on electrical circuits for
hazardous systems.
● They are trained or instructed in maintenance and use of appropriate safety equipment
according to the pertinent safety regulations.
WARNING
Use in hazardous area
Risk of explosion.
● Only use equipment that is approved for use in the intended hazardous area and labelled
accordingly.
● Don't use devices that have been operated outside the conditions secified for hazardous
areas. If you have used the device outside the conditions for hazardous areas permanently
make all Ex markings unrecognizable on the nameplate.
See also
Technical data (Page 55)
WARNING
Loss of safety of device with type of protection "Intrinsic safety Ex i"
If the device has already been operated in non-intrinsically safe circuits or the electrical
specifications have not been observed, the safety of the device is no longer ensured for use
in hazardous areas. There is a risk of explosion.
● Connect the device with type of protection "Intrinsic safety" solely to an intrinsically safe
circuit.
● Observe the specifications for the electrical data on the certificate and/or in Technical
data (Page 55).
Safety instructions
2.3 Use in hazardous areas
SITRANS P320/P420 (mA/HART)
Compact Operating Instructions, 06/2018, A5E38874562-AA 15

WARNING
Use of incorrect device parts in potentially explosive environments
Devices and their associated device parts are either approved for different types of protection
or they do not have explosion protection. There is a risk of explosion if device parts (such as
covers) are used for devices with explosion protection that are not expressly suited for this
type of protection. If you do not adhere to these guidelines, the test certificates and the
manufacturer warranty will become null and void.
● Use only device parts that have been approved for the respective type of protection in the
potentially explosive environment. Covers that are not suited for the "explosion-proof" type
of protection are identified as such by a notice label attached to the inside of the cover
with "Not Ex d Not SIL".
● Do not swap device parts unless the manufacturer specifically ensures compatibility of
these parts.
WARNING
Incorrect material for the diaphragm in Zone 0
Risk of explosion in the hazardous area. If operated with intrinsically safe supply devices of
category "ib" or devices of the flameproof enclosure version "Ex d" and simultaneous use in
Zone 0, pressure transmitter explosion protection depends on the tightness of the diaphragm.
● Ensure that the material used for the diaphragm is suitable for the process medium. Refer
to the information in the section "Technical data (Page 55)".
Safety instructions
2.3 Use in hazardous areas
SITRANS P320/P420 (mA/HART)
16 Compact Operating Instructions, 06/2018, A5E38874562-AA

Installing/mounting 3
3.1 Basic safety instructions
DANGER
Pressure applications
Danger to personnel, system and environment will result from improper disassembly.
● Never attempt to loosen, remove, or disassemble process connection while vessel
contents are under pressure.
WARNING
Wetted parts unsuitable for the process media
Risk of injury or damage to device.
Hot, toxic and corrosive media could be released if the process medium is unsuitable for the
wetted parts.
● Ensure that the material of the device parts wetted by the process medium is suitable for
the medium. Refer to the information in Technical data (Page 55).
WARNING
Unsuitable connecting parts
Risk of injury or poisoning.
In case of improper mounting, hot, toxic, and corrosive process media could be released at
the connections.
● Ensure that connecting parts (such as flange gaskets and bolts) are suitable for connection
and process media.
WARNING
Exceeded maximum permissible operating pressure
Risk of injury or poisoning.
The maximum permissible operating pressure depends on the device version, pressure limit
and temperature rating. The device can be damaged if the operating pressure is exceeded.
Hot, toxic and corrosive process media could be released.
Ensure that maximum permissible operating pressure of the device is not exceeded. Refer
to the information on the nameplate and/or in Technical data (Page 55).
SITRANS P320/P420 (mA/HART)
Compact Operating Instructions, 06/2018, A5E38874562-AA 17

WARNING
Incorrect material for the diaphragm in Zone 0
Risk of explosion in the hazardous area. If operated with intrinsically safe supply devices of
category "ib" or devices of the flameproof enclosure version "Ex d" and simultaneous use in
Zone 0, pressure transmitter explosion protection depends on the tightness of the diaphragm.
● Ensure that the material used for the diaphragm is suitable for the process medium. Refer
to the information in the section "Technical data (Page 55)".
WARNING
Loss of safety for devices with "flameproof enclosure" type of protection
Risk of explosion in hazardous areas. An explosion may be caused by hot gas escaping from
the flameproof enclosure if there is too little space between it and fixed parts (e.g. walls, pipes).
● Ensure that there is a minimum clearance of at least 40 mm between the flameproof joints
and the fixed parts.

①Flameproof joint
WARNING
Vibrations in the plant
Risk of injury or damage to device.
Vibration leads to material fatigue, for example, cracks and weld seams breaks.
Hot, toxic and corrosive process media can emerge.
● Make sure that you have mounted the pressure transmitter (including accessories)
protected against vibration.
Refer to the information on vibration resistance in the section Technical specifications
(Page 55).
Installing/mounting
3.1 Basic safety instructions
SITRANS P320/P420 (mA/HART)
18 Compact Operating Instructions, 06/2018, A5E38874562-AA

CAUTION
Hot surfaces resulting from hot process media
Risk of burns resulting from surface temperatures above 65 °C (149 °F).
● Take appropriate protective measures, for example contact protection.
● Make sure that protective measures do not cause the maximum permissible ambient
temperature to be exceeded. Refer to the information in Technical data (Page 55).
CAUTION
External stresses and loads
Damage to device by severe external stresses and loads (e.g. thermal expansion or pipe
tension). Process media can be released.
● Prevent severe external stresses and loads from acting on the device.
Note
Material compatibility
Siemens can provide you with support concerning selection of sensor components wetted by
process media. However, you are responsible for the selection of components. Siemens
accepts no liability for faults or failures resulting from incompatible materials.
3.1.1 Installation location requirements
WARNING
Insufficient air supply
The device may overheat if there is an insufficient supply of air.
● Install the device so that there is sufficient air supply in the room.
● Observe the maximum permissible ambient temperature. Refer to the information in the
section Technical data (Page 55).
CAUTION
Aggressive atmospheres
Damage to device through penetration of aggressive vapors.
● Ensure that the device is suitable for the application.
Installing/mounting
3.1 Basic safety instructions
SITRANS P320/P420 (mA/HART)
Compact Operating Instructions, 06/2018, A5E38874562-AA 19

NOTICE
Direct sunlight
Increased measuring errors.
● Protect the device from direct sunlight.
Make sure that the maximum ambient temperature is not exceeded. Refer to the information
in the section Technical data (Page 55).
3.1.1.1 Devices with marine approval
Note
For vibrations in the direction of the measuring cell diaphragm, the measuring accuracy of the
pressure transmitter with flush-mounted diaphragm can deviate no more than 0.2% from the
respective specification.
● Install the device so that no or almost no vibrations occur in the direction of the diaphragms.
● To avoid measuring values that fluctuate strongly, use the damping function.
For information on vibration resistance, refer to the marine approval certificate.
3.1.2 Proper mounting
WARNING
Incorrect mounting at Zone 0
Risk of explosion in hazardous areas.
● Ensure sufficient tightness at the process connection.
● Observe the standard IEC/EN 60079-14.
CAUTION
Loss of type of protection
Damage to device if the enclosure is open or not properly closed. The type of protection
specified on the nameplate or in Technical data (Page 55) is no longer guaranteed.
● Make sure that the device is securely closed.
Installing/mounting
3.1 Basic safety instructions
SITRANS P320/P420 (mA/HART)
20 Compact Operating Instructions, 06/2018, A5E38874562-AA