Siemens SITRANS P300 User manual

Pressure transmitter
SITRANS P300
Compact Operating Instructions •08/2011
SITRANS

English..................................................................................................................................................................4
Dansk .................................................................................................................................................................34
Ελληνικά .............................................................................................................................................................64
Português...........................................................................................................................................................95
Svenska............................................................................................................................................................126
Magyar..............................................................................................................................................................155

© Siemens Ⓟ2011
A5E03434764-01, 08/2011 3
SITRANS
Pressure transmitter
SITRANS P300 (7MF8.23.. 7MF8.24.. 7MF8.25..)
Compact Operating Instructions
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
with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken.
CAUTION
without a safety alert symbol, indicates that property damage can result if proper precautions are not taken.
NOTICE
indicates that an unintended result or situation can occur if the relevant information is not taken into account.
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.

© Siemens Ⓟ2011
4 A5E03434764-01, 08/2011
Introduction
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. It is your responsibility to 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 mechanically assemble the device, connect it electrically, and start it up.
To achieve optimum usage of the device, read the detailed version of the manual on the electronic data medium.
See also
Instructions and Manuals (http://www.siemens.com/processinstrumentation/documentation)
History
This history establishes the correlation between the current documentation and the valid firmware of the device.
Currently released versions of these instructions:
Edition Firmware identifier nameplate System integration Installation path for PDM
08/2011 HART: FW: 29.03.07
PA/FF: FW: 0300.01.08
PDM 6.01); Dev. Rev. 3
DD Rev. 2
SITRANS P300
1) up to SP05 Hotfix 5
Purpose
Overview
Depending on the version, a transmitter measures corrosive, non-corrosive and hazardous gases, vapors and liquids.
You can use the transmitter for the following types of measurement:
● Gauge pressure
● Absolute pressure
With appropriate parameter settings and the necessary add-on parts (e.g. flow orifices and remote seals), the pressure
transmitter can also be used for the following measurements:
● Level
● Volume
● Mass
The output signal is a load-independent direct current of 4 to 20 mA which is linearly proportional to the input pressure.
The "Intrinsically-safe" version of the transmitter can be installed in hazardous areas (zone 1). The devices have an EC type
examination certificate and comply with the appropriate harmonized European CENELEC directives.
Operate the device in accordance with the specifications in Section Technical data (Page 25).
For additional information, please refer to the operating instructions for the device.
Checking the consignment
1. Check the packaging and the device for visible damage caused by inappropriate handling during shipping.
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 the shipping documents with your order for correctness and completeness.

SITRANS P300 (7MF8.23.. 7MF8.24.. 7MF8.25..)
A5E03434764-01, 08/2011 5
WARNING
Using a damaged or incomplete device
Danger of explosion in hazardous areas.
● Do not use any damaged or incomplete devices.
Nameplate layout
Overview
The nameplate bearing the Order No. and other important information, such as design details and technical data, is on the
enclosure.
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① Product name/manufacturer ⑧ Group (gas, dust)
② Product information ⑨ Maximum surface temperature (temperature
class)
③ Technical data ⑩ Hardware identifier
④ Certification information ⑪ Firmware identification
⑤ Characteristics for hazardous area ⑫ Order No. (machine-readable product code)
⑥ Category for operating area ⑬ Serial number
⑦ Type of protection
Figure 1 Example of nameplate: Product and approval information
FW: aa.bb. cc Firmware for HART
aa. Device type
bb. Document revision
cc FW edition
FW: aaaa.bb. cc Firmware for PROFIBUS
aaaa. Profile revision (0300 = 3.00)
bb. Document revision
cc FW edition
HW: xx. yy. zz Hardware
xx Serial number
yy. Connection board product version
zz Compatibility mark

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6 A5E03434764-01, 08/2011
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.
CAUTION
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 25).
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.
Safety instructions
Prerequisites for safe 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.
Warning symbols on the device
Symbol Explanation
Consult operating instructions
Laws and directives
Observe the test certification, 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 (EC)

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A5E03434764-01, 08/2011 7
Conformity with European directives
The CE mark on the device is a sign of conformity with the following European directives:
Electromagnetic Compatibility
EMC
2004/108/EC
Directive of the European Parliament and of the Council on the
approximation of the laws of the Member States relating to electromagnetic
compatibility and repealing Directive 89/336/EEC.
Atmosphère explosible ATEX
94/9/EC
Directive of the European Parliament and the Council on the approximation
of the laws of the Member States concerning equipment and protective
systems intended for use in potentially explosive atmospheres.
Pressure Equipment Directive
PED
97/23/EC
Directive of the European Parliament and of the Council on the
approximation of the laws of the Member States concerning pressure
equipment.
The standards applied can be found in the EC declaration of conformity for the device.
Incorrect device modifications
WARNING
Improper device modifications
Danger 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.
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.
Use in hazardous areas
Qualified personnel for hazardous area applications
Persons who install, assemble, 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 and aggressive as well as 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
Unsuitable device for the hazardous area
Danger of explosion.
● Only use equipment that is approved for use in the intended hazardous area and labelled accordingly.

SITRANS P300 (7MF8.23.. 7MF8.24.. 7MF8.25..)
8 A5E03434764-01, 08/2011
See also
Technical data (Page 25)
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 danger of explosion.
● Connect the device with type of protection "Intrinsic safety" solely to an intrinsically safe circuit.
● Observe the specifications for the electrical data in the certificate and in Technical data (Page 25).
WARNING
Risk of explosion due to electrostatic charge
To prevent the build-up of an electrostatic charge in a hazardous area, the key cover must be closed during operation and
the screws tightened.
The key cover may be opened temporarily at any time for the purposes of operating the transmitter, even during plant
operation; the screws should then be tightened again.
Installing/mounting
Basic safety instructions
WARNING
Wetted parts unsuitable for the process media
Danger 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 25).
WARNING
Incorrect material for the diaphragm in Zone 0
Danger of explosion in the hazardous area. In the case of operation with intrinsically safe supply units of category "ib" or
devices of the flameproof enclosure version "Ex d" and simultaneous use in Zone 0, 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 25)".
WARNING
Unsuitable connecting parts
Danger 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.

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A5E03434764-01, 08/2011 9
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.
WARNING
Exceeded maximum permissible operating pressure
Danger of injury or poisoning.
The maximum permissible operating pressure depends on the device version. The device can be damaged if the operating
pressure is exceeded. Hot, toxic and corrosive process media could be released.
● Make sure that the device is suitable for the maximum permissible operating pressure of your system. Refer to the
information on the nameplate and/or in Chapter "Technical data (Page 25)".
WARNING
Exceeded maximum ambient or process media temperature
Danger of explosion in areas subject to explosion hazard.
Device damage.
● Make sure that the maximum permissible ambient and process media temperatures of the device are not exceeded.
Refer to the information in Chapter Technical data (Page 25).
WARNING
Open cable inlet or incorrect cable gland
Danger of explosion in hazardous areas.
● Close the cable inlets for the electrical connections. Only use cable glands or plugs which are approved for the relevant
type of protection.
WARNING
Incorrect conduit system
Danger of explosion in hazardous areas as result of open cable inlet or incorrect conduit system.
● In the case of a conduit system, mount a spark barrier at a defined distance from the device input. Observe national
regulations and the requirements stated in the relevant approvals.
See also
Technical data (Page 25)
WARNING
Incorrect mounting at Zone 0
Danger of explosion in areas subject to explosion hazard.
● Ensure sufficient tightness at the process connection.
● Observe the standard IEC/EN 60079-26.

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10 A5E03434764-01, 08/2011
WARNING
Loss of explosion protection
Danger of explosion in hazardous areas if the device is open or not properly closed.
● Close the device as described in Chapter "Connecting the device (Page 16)".
CAUTION
Hot surfaces resulting from hot process media
Danger of burns resulting from surface temperatures above 70 °C (155 °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 Chapter Technical data (Page 25).
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.
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 25)".
CAUTION
Aggressive atmospheres
Damage to device through penetration of aggressive vapors.
● Ensure that the device is suitable for the application.
CAUTION
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 25).

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A5E03434764-01, 08/2011 11
Proper mounting
CAUTION
Incorrect assembly
The device can be damaged or destroyed or its functionality impaired through incorrect assembly.
● Make sure before installing the device that there is no visible damage.
● Check that the process connections are clean and the right seals and cable glands have been used.
● Assemble the device using suitable tools, observing the torques specified in the technical specifications.
NOTICE
Loss of degree of protection
Damage to device if the enclosure is open or not properly closed. The degree of protection specified on the nameplate or in
"Technical data" (Page 25) is no longer guaranteed.
● Make sure that the device is securely closed.
See also
Connecting the device (Page 16)
Uninstalling
WARNING
Incorrect disassembly
The following dangers may result through incorrect disassembly:
- Injury through electric shock
- Danger through emerging media when connected to the process
- Danger of explosion in hazardous area
In order to disassemble correctly, observe the following:
● Before starting work, make sure that you have switched off all physical variables such as pressure, temperature,
electricity etc. or that they have a harmless value.
● If the device contains dangerous media, it must be emptied prior to disassembly. Make sure that no environmentally
hazardous media are released.
● Secure the remaining connections so that no damage can result if the process is started unintentionally.
Installation (except level)
Installation mounting (except for level)
Requirements
NOTICE
Compare the desired operating data with the data on the nameplate.
Please also refer to the information on the remote seal if this is fitted.

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12 A5E03434764-01, 08/2011
Note
Protect the transmitter against:
● Direct heat radiation
● Rapid temperature fluctuations
● Heavy contamination
● Mechanical damage
● Direct sunlight
NOTICE
The housing may only be opened for maintenance, local operation or to make electrical connections.
The installation location is to be as follows:
● Easily accessible
● As close as possible to the measuring point
● Vibration-free
● Within the permitted ambient temperature values
Installation configuration
The transmitter may in principle be configured above or below the pressure tapping point. The recommended configuration
depends on the medium.
Installation configuration for gases
Install the transmitter above the pressure tapping point.
Lay the pressure tubing with a constant gradient to the pressure tapping point, so that any condensate produced can drain in
the main line and thereby avoid corruption of the measured values.
Installation configuration for vapor and liquid
Install the transmitter below the pressure tapping point.
Lay the pressure tubing with a constant gradient to the pressure tapping point so that any gas pockets can escape in the
main line.
See also
Introduction to commissioning (Page 19)
Installation (except level)
NOTICE
Damage to measuring cell
When installing the process connection of the pressure transmitter, do not rotate the housing. Rotating the housing may
damage the measuring cell.
To avoid damage to the device, tighten the threaded nuts of the measuring cell using a wrench.
Procedure
Attach the transmitter to the process connection with an appropriate tool.
See also
Introduction to commissioning (Page 19)

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"Level" installation
Information for installing level variant
Requirements
NOTICE
Compare the desired operating data with the data on the nameplate.
Please also refer to the information on the remote seal if this is fitted.
Note
Protect the transmitter from:
● Direct heat
● Rapid temperature changes
● Severe soiling
● Mechanical damage
● Direct sunlight
NOTICE
The enclosure may only be opened for maintenance, local operation or to make electrical connections.
The installation location is to be as follows:
● Easily accessible
● As close as possible to the measuring point
● Vibration-free
● Within the permitted ambient temperature values
Installation configuration
The transmitter can only be used in non-pressurized vessels for level.
Installation height
0(
0$
S
K
R
K
X
Level of non-pressurized vessel
Formula:
Zero point: pMA = ρ · g · HU
Full-scale value: pME = ρ · g · HO
MA Zero point ΔpMA Limit point to be adjusted

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14 A5E03434764-01, 08/2011
ME Limit point ΔpME Limit point to be adjusted
p Pressure ρ Density of the measured medium in the
container
hU Start-of-scale value g Acceleration due to gravity
hO Full-scale value
Note
Select the height of the container flange for recording of the transmitter ( measuring point ) such that the lowest level to be
measured is always over the flange or at its upper edge.
Installation for level
Note
Seals are required for the installation. The seals must be compatible with the medium to be measured.
Seals are not included in the delivery.
Procedure
To install the transmitter for level, proceed as follows:
1. Attach the seal to the container's mating flange.
Ensure that the seal is centrically positioned and that it does not restrict the movement of the flange's seal diaphragm in
any way as otherwise the tightness of the process connection is not guaranteed.
2. Screw on the transmitter's flange.
3. Observe the installation position.
Connecting
Basic safety instructions
WARNING
Unsuitable cables and/or cable glands
Danger of explosion in hazardous areas if you connect cables and/or cable glands which do not match one another or do
not comply with the technical requirements.
● Only use cables and cable glands complying with the requirements specified in the section Technical data (Page 25).
● Tighten the cable glands in accordance with the specified torques.
● When replacing cable glands use only cable glands of the same type.
● After installation check that the cables are seated firmly.
WARNING
Improper power supply
Danger of explosion in hazardous areas as result of incorrect power supply, e.g. using direct current instead of alternating
current.
● Connect the device in accordance with the specified power supply and signal circuits. The relevant specifications can
be found in the certificates, in Chapter "Technical data (Page 25)" or on the nameplate.

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A5E03434764-01, 08/2011 15
WARNING
Unsafe extra-low voltage
Danger of explosion in hazardous areas due to voltage flashover.
● Connect the device to an extra-low voltage with safe isolation (SELV).
WARNING
Lack of equipotential bonding
Danger of explosion through compensating currents or ignition currents through lack of equipotential bonding.
● Ensure that the device is potentially equalized.
Exception: It may be permissible to omit connection of the equipotential bonding for devices with type of protection
"Intrinsic safety Ex i".
WARNING
Unprotected cable ends
Danger of explosion through unprotected cable ends in hazardous areas.
● Protect unused cable ends in accordance with IEC/EN 60079-14.
WARNING
Improper laying of shielded cables
Danger of explosion through compensating currents between hazardous area and the non-hazardous area.
● Only ground shielded cables that run into the hazardous area at one end.
● If grounding is required at both ends, use an equipotential bonding conductor
WARNING
Connecting device in energized state
Danger of explosion in hazardous areas.
● Connect devices in hazardous areas only in a de-energized state.
Exceptions:
● Circuits of limited energy may also be connected in the energized state in hazardous areas.
● Exceptions for type of protection "Non-sparking nA" (Zone 2) are regulated in the relevant certificate
WARNING
Incorrect selection of type of protection
Danger of explosion in areas subject to explosion hazard.
This device is approved for several types of protection.
1. Decide in favor of one type of protection.
2. Connect the device in accordance with the selected type of protection.
3. In order to avoid incorrect use at a later point, make the types of protection that are not used permanently
unrecognizable on the nameplate.

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16 A5E03434764-01, 08/2011
CAUTION
Ambient temperature too high
Damage to cable sheath.
● At an ambient temperature ≥ 60 °C (140 °F), use heat-resistant cables suitable for an ambient temperature at least 20
°C (68 °F) higher.
CAUTION
Incorrect measured values with incorrect grounding
The device must not be grounded via the "+" connection. It may otherwise malfunction and be permanently damaged.
● If necessary, ground the device using the "-" connection.
Note
Electromagnetic compatibility (EMC)
You can use this device in industrial environments, households and small businesses.
For metal housings there is an increased electromagnetic compatibility compared to high-frequency radiation. This
protection can be increased by grounding the housing, see section "Connecting the device (Page 16)".
Note
Improvement of interference immunity
● Lay signal cables separate from cables with voltages > 60 V.
● Use cables with twisted wires.
● Keep device and cables in distance to strong electromagnetic fields.
● Use shielded cables to guarantee the full specification according to HART.
● Connect a load resistor of at least 230 Ω in series in the signal circuit in order to guarantee fault-free HART
communication. When power supply isolators are used for HART transmitters, e.g. SITRANS I, a load resistor is already
installed in the device.
Connecting the device
Opening the device
1. Unscrew the cover of the electrical cable compartment.
2. Unscrew the cable gland cover and remove the plastic seal.

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Connecting the device
Note
The following values can be set for the load:
● 230 to 1100 Ω for the HART communicator
● 230 to 500 Ω for the HART modem
1. Strip approximately 15 cm from the outer sheath of the cable.
2. Insert the wires of the connecting cable through the cable gland and lead them through the guide channel. The guide
channel connects the cable gland to the connecting terminals.
3. If you have a plastic cable gland, connect the shield to the ground terminal ②. The ground terminal is electrically
connected to the enclosure.
4. If you have a metal cable gland, ground the shield to the cable gland ground terminal ③ as follows:
–Leave approx. 2 cm of extra shield.
–Turn the shield over the insulation. See Fig.
–Firmly press in the plastic seal. The O-ring will in turn press the shield against the enclosure.
5. Screw on the cable gland cover with a 23 mm open end wrench until strain relief is ensured.
6. Strip the wires.
7. Connect the wires to the terminals ① "+" and "-".
Ensure correct polarity! If necessary, ground the device using the
8. "-" connection by connecting the "-" connection to the ground terminal ②.

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18 A5E03434764-01, 08/2011
ದ







① Connecting terminals ⑤ Auxiliary power UH
② Ground terminal with plastic cable gland ⑥ Load
③ Guide channel ⑦ Cable gland
④ Ground terminal for cable gland with metal cable
gland
Figure 2 Electrical connection, power supply
Closing the device
1. Screw on the cover of the electrical cable compartment.
2. Check the tightness of the cable gland in accordance with the degree of protection.
Commissioning
Basic safety instructions
WARNING
Improper commissioning in hazardous areas
Device failure or danger of explosion in hazardous areas.
● Do not commission the device until it has been mounted completely and connected in accordance with the information
in Chapter "Technical data (Page 25)".
● Before commissioning take the effect on other devices in the system into account.
DANGER
Toxic gases and liquids
Danger of poisoning when the device is vented.
If toxic process media are measured, toxic gases and liquids can be released when the device is vented.
● Before venting ensure that there are no toxic gases and liquids in the device. Take the appropriate safety measures.

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A5E03434764-01, 08/2011 19
WARNING
Opening device in energized state
Danger of explosion in areas subject to explosion hazard.
● Only open the device in a de-energized state.
● Check prior to commissioning that the cover, cover locks, and cable inlets are assembled in accordance with the
directives.
Exception: Devices having the type of protection "Intrinsic safety Ex i" may also be opened in energized state in hazardous
areas.
NOTICE
Hot surfaces
Hot process medium and high ambient temperatures lead to hot surfaces which can cause burns.
● Take corresponding protective measures, for example wear protective gloves.
Introduction to commissioning
Following commissioning, the transmitter is immediately ready for use.
To obtain stable measured values, the transmitter needs to be allowed to warm up for five minutes or so after the power
supply is switched on.
The operating data must correspond to the values specified on the nameplate. If you switch on the auxiliary power, the
transmitter will operate.
The following commissioning cases are typical examples. Configurations different from those listed here may be meaningful
depending on the system configuration.
Commissioning with steam or liquid







① Pressure transmitter
② Shut-off fitting
③ Shut-off valve to process
④ Shut-off valve for test connection or for bleed screw
⑤ Pressure line
⑥ Shut-off valve

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20 A5E03434764-01, 08/2011
⑦ Blow-out valve
⑧ Compensation vessel (steam only)
Figure 3 Measuring steam
Requirement
All valves are closed.
Procedure
To commission the transmitter for steam or liquid, proceed as follows:
1. Open the shut-off valve for the test connection ④.
2. Via the test connection of the shut-off module ②, apply the pressure corresponding to the start of scale value to the
pressure transmitter ①.
3. Check the start of scale value.
4. If the start of scale value differs from the value desired, correct it.
5. Close the shut-off valve for the test connection ④.
6. Open the shut-off valve ⑥ at the pressure tapping point.
7. Open the shut-off valve for the process ③.
Commissioning for gases
Usual arrangement Special arrangement
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Measuring gases above the pressure tapping point Measuring gases below the pressure tapping point