SITRANS P transmitter with PMC connection for the paper industry Siemens
Область применения
The pressure transmitters of the DS III series, can be used in industrial areas with extreme chemical and mechanical loads. Electromagnetic compatibility in the range 10 kHz ... 1 GHz makes the DS III pressure transmitters suitable for locations with high electromagnetic emissions.
Pressure transmitters with type of protection "Intrinsic safety" and "Explosion-proof" may be installed within potentially explosive atmospheres (zone 1) or in zone 0. The pressure transmitters are provided with an EC type examination certificate and comply with the corresponding harmonized European standards (ATEX).
Pressure transmitters with the type of protection "Intrinsic safety" for use in zone 0 may be operated with power supply units of category "ia" and "ib".
The transmitters can be equipped with various designs of remote seals for special applications such as the measurement of highly viscous substances.
The pressure transmitter can be operated locally over 3 control keys or programmed externally over HART communication or over PROFIBUS PA or Foundation Fieldbus interface (only DS III).
SITRANS P, DS III series
Measured variable: Gage pressure of aggressive and non-aggressive gases, vapors and liquids.
Span (infinitely adjustable)
For DS III HART: 0.03 ... 16 bar g (0.433 ... 232 psi g)
Nominal measuring range
For DS III PA and FF: 1 ... 16 bar g (14.5 ... 232 psi g)
SITRANS P300
Span (infinitely adjustable)
For DS III HART: 0.03 ... 16 bar g (0.433 ... 232 psi g)
Nominal measuring range
For DS III PA: 1 ... 16 bar g (14.5 ... 232 psi g)
Обзор
The SITRANS P300 and DS III pressure transmitters have been fitted with special process connections for the paper industry. With the two process connection threads 1½" and 1" flush at the front, the SITRANS P300 and DS III transmitters can be used for all processes in the paper industry.
SITRANS P300 and DS III series pressure transmitters are digital pressure transmitters featuring extensive user-friendliness and high accuracy. The parameterization is performed using control keys, over HART communication, PROFIBUS-PA or Foundation Fieldbus interface (DS III only).
Extensive functionality enables the pressure transmitter to be precisely adapted to the plant''s requirements. Operation is very simple in spite of the numerous setting options.
Transmitters with type of protection "Intrinsic safety" and "Explosion-proof" may be installed within potentially explosive atmospheres (zone 1) or in zone 0. The transmitters are provided with an EC type examination certificate and comply with the corresponding harmonized European standards (ATEX).
Various versions of the pressure transmitters are available for measuring:
- Gage pressure
- Filling level
- Volume level
- Mass level
Дизайн
SITRANS P, DS III seriesxxx
Device front view, SITRANS P DS III
The transmitter comprises a range of different components, depending on the order specifications. The various options are listed in the ordering information. The components described below are the same for all transmitters.
The rating plate (3, Figure "Front view") with the Order No. is located on the side of the housing. The specified number together with the ordering information provide details on the optional design details and on the possible measuring range (physical properties of built-in sensor element).
The approval label is located on the opposite side.
The housing is made of die-cast aluminium or stainless steel precision casting. A round cover is screwed on at the front and rear of the housing. The front cover (6) can be fitted with a viewing pane so that the measured values can be read directly on the digital display. The inlet (4) for the electrical connection is located either on the left or right side. The unused opening on the opposite side is sealed by a blanking plug. The protective earth connection is located on the rear of the housing.
The electrical connections for the power supply and screen are accessible by unscrewing the rear cover. The bottom part of the housing contains the measuring cell with process connection (1). The measuring cell is prevented from rotating by a locking screw (8). As the result of this modular design, the measuring cell and the electronics can be replaced separately from each other. The set parameter data are retained.
At the top of the housing is a plastic cover (5), which hides the input keys.
SITRANS P300
The device comprises:
- Electronics
- Housing
- Measuring cell
Perspective view of the SITRANS P300
The housing has a screwable cover (3), with or without an inspection window depending on the version. The electrical terminal housing, the buttons for operation of the device and, depending on the version, the digital display are located under this cover. The connections for the auxiliary power UH and the shield are in the terminal housing. The cable gland is on the side of the housing. The measuring cell with the process connection (5) is located on the underside of the housing. Depending on the version of the device, the measuring cell with the process connection may differ from the one shown in the diagram.
Example for an attached measuring point label
Функции
Operation of electronics with HART communication
Function diagram of electronics
The bridge output voltage created by the sensor (1, Figure "Function diagram of electronics") is amplified by the measuring amplifier (2) and digitized in the analog-to-digital converter (3). The digital information is evaluated in a microcontroller, its linearity and temperature response corrected, and converted in a digital-to-analog converter (5) into an output current of 4 to 20 mA.
The diode circuit (10) protects against incorrect polarity.
The data specific to the measuring cell, the electronics data, and the parameter data are stored in the two non-volatile memories (6). The one memory is coupled to the measuring cell, the other to the electronics. As the result of this modular design, the electronics and the measuring cell can be replaced separately from each other.
Using the 3 input keys (8) you can parameterize the pressure transmitter directly at the measuring point. The input keys can also be used to control the view of the results, the error messages and the operating modes on the digital display (9).
The HART modem (7) permits parameterization using a protocol according to the HART specification.
The pressure transmitters with spans ≤ 63 bar g measure the input pressure compared to atmosphere, the transmitters with spans ≥ 160 bar g measure compared to vacuum.
Operation of electronics with PROFIBUS PA communication
Function diagram of electronics
The bridge output voltage created by the sensor (1, Figure "Function diagram of electronics") is amplified by the measuring amplifier (2) and digitized in the analog-to-digital converter (3). The digital information is evaluated in the microcontroller, its linearity and temperature response corrected, and provided on the PROFIBUS PA through an electrically isolated PA interface (7).
The data specific to the measuring cell, the electronics data, and the parameter data are stored in the two non-volatile memories (6). The first memory is linked with the measuring cell, the second with the electronics. This modular design means that the electronics and the measuring cell can be replaced separately from one another.
Using the three input keys (8) you can parameterize the pressure transmitter directly at the measuring point. The input keys can also be used to control the view of the results, the error messages and the operating modes on the digital display (9).
The results with status values and diagnostic values are transferred by cyclic data transmission on the PROFIBUS PA. Parameterization data and error messages are transferred by acyclic data transmission. Special software such as SIMATIC PDM is required for this.
Operation of electronics with FOUNDATION fieldbus communication
Function diagram of electronics
The bridge output voltage created by the sensor (1, Figure "Function diagram of electronics") is amplified by the measuring amplifier (2) and digitized in the analog-to-digital converter (3). The digital information is evaluated in the microcontroller, its linearity and temperature response corrected, and provided on the FOUNDATION fieldbus through an electrically isolated FOUNDATION fieldbus interface (7).
The data specific to the measuring cell, the electronics data, and the parameter data are stored in the two non-volatile memories (6). The one memory is coupled to the measuring cell, the other to the electronics. As the result of this modular design, the electronics and the measuring cell can be replaced separately from each other.
Using the three input keys (8) you can parameterize the pressure transmitter directly at the measuring point. The input keys can also be used to control the view of the results, the error messages and the operating modes on the digital display (9).
The results with status values and diagnostic values are transferred by cyclic data transmission on the FOUNDATION fieldbus. Parameterization data and error messages are transferred by acyclic data transmission. Special software such as National Instruments Configurator is required for this.
Mode of operation of the measuring cell
Measuring cell for gage pressure with flush-mounted diaphragm
Measuring cell for gage pressure, with flush-mounted diaphragm for paper industry, function diagram
The pressure pe is applied through the process connection (2, Figure "Measuring cell for gage pressure, with flush-mounted diaphragm for paper industry, function diagram") to the measuring cell (1). This pressure is subsequently transmitted further through the seal diaphragm (3) and the filling liquid (4) to the silicon pressure sensor (5) whose measuring diaphragm is then flexed. This changes the resistance of the four piezo-resistors fitted in the diaphragm in a bridge circuit. This change in resistance results in a bridge output voltage proportional to the absolute pressure.
Parameterization
Depending on the version, there are a range of options for parameterizing the pressure transmitter and for setting or scanning the parameters.
Parameterization using the input keys (local operation)
With the input keys you can easily set the most important parameters without any additional equipment.
Parameterization using HART communication
Parameterization using HART communication is performed with a HART communicator or a PC.
Communication between a HART communicator and a pressure transmitter
When parameterizing with the HART communicator, the connection is made directly to the 2-wire cable.
HART communication between a PC communicator and a pressure transmitter
When parameterizing with a PC, the connection is made through a HART modem.
The signals needed for communication in conformity with the HART 5.x or 6.x protocols are superimposed on the output current using the Frequency Shift Keying (FSK) method.
Adjustable parameter DS III HART and P300 HART
Parameters | Input keys | HART communication |
|---|---|---|
Start of scale | x | x |
Full-scale value | x | x |
Electrical damping | x | x |
Start-of-scale value without application of a pressure ("Blind setting") | x | x |
Full-scale value without application of a pressure ("Blind setting") | x | x |
Zero adjustment | x | x |
current sensor | x | x |
Fault current | x | x |
Disabling of keys, write protection | x | x 1) |
Type of dimension and actual dimension | x | x |
Characteristic (linear) | x | x |
Input of characteristic | x | |
Freely-programmable LCD | x | |
Diagnostic functions | x |
1) Cancel apart from write protection.
Diagnostic functions for DS III HART and P300 HART
- Zero correction display
- Event counter
- Limit transmitter
- Saturation alarm
- Slave pointer
- Simulation functions
- Maintenance timer
Available physical units of display for DS III HART and P300 HART
Physical variable | Physical dimensions |
|---|---|
Pressure (setting can also be made in the factory) | Pa, MPa, kPa, bar, mbar, torr, atm, psi, g/cm2, kg/cm2, inH2O, inH2O (4 °C), mmH2O, ftH2O (20 °C), inHg, mmHg |
Level (height data) | m, cm, mm, ft, in |
Volume | m3, dm3, hl, yd3, ft3, in3, US gallon, lmp. gallon, bushel, barrel, barrel liquid |
Mass | g, kg, t, lb, Ston, Lton, oz |
Temperature | K, °C, °F, °R |
Miscellaneous | %, mA |
Parameterization through PROFIBUS PA interface
Fully digital communication through PROFIBUS PA, profile 3.0, is particularly user-friendly. The PROFIBUS puts the DS III PA is in connection with a process control system, e.g. SIMATIC PSC 7. Communication is possible even in a potentially explosive environment.
For parameterization through PROFIBUS you need suitable software, e.g. SIMATIC PDM (Process Device Manager).
Parameterization through FOUNDATION fieldbus interface
Fully digital communication through FOUNDATION fieldbus is particularly user-friendly. Through the FOUNDATION fieldbus the DS III FF is connected to a process control system. Communication is possible even in a potentially explosive environment.
For parameterization through the FOUNDATION fieldbus you need suitable software, e.g. National Instruments Configurator.
Adjustable parameters for DS III PA and FF and P300 PA and FF
Adjustable parameters | Input keys | PROFIBUS PA and FOUNDATION fieldbus interface |
|---|---|---|
Electrical damping | x | x |
Zero adjustment (correction of position) | x | x |
Key and/or function disabling | x | x |
Source of measured-value display | x | x |
Physical dimension of display | x | x |
Position of decimal point | x | x |
Bus address | x | x |
Adjustment of characteristic | x | x |
Input of characteristic | x | |
Freely-programmable LCD | x | |
Diagnostic functions | x |
Diagnostic functions for DS III PA and FF and P300 PA and FF
- Event counter
- Slave pointer
- Maintenance timer
- Simulation functions
- Display of zero correction
- Limit transmitter
- Saturation alarm
Physical dimensions available for the display
Physical variable | Physical dimensions |
|---|---|
Pressure (setting can also be made in the factory) | MPa, hPa, kPa, Pa, bar, mbar, torr, atm, psi, g/cm2, kg/cm2, mmH2O, mmH2O (4 °C), inH2O, inH20 (4 °C), ftH2O, mmHg, inHg |
Level (height data) | m, cm, mm, ft, in, yd |
Mass | g, kg, t, lb, Ston, Lton, oz |
Volume | m3, dm3, hl, yd3, ft3, in3, US gallon, lmp. gallon, bushel, barrel, barrel liquid |
Temperature | K, °C, °F, °R |
Miscellaneous | % |
Особенности
- High quality and service life
- High reliability even under extreme chemical and mechanical loads, e.g. abrasion.
- For aggressive and non-aggressive gases, vapors and liquids
- Extensive diagnosis and simulation functions
- Minimum conformity error
- Small long-term drift
- Wetted parts made of Hastelloy
- Infinitely adjustable span from 0.03 bar g to 16 bar g (0.43 psi g to 232 psi g) for DS III with HART interface
- Nominal measuring range from 1 bar g to 16 bar g (14.5 psi g to 232 psi g) for DS III with PROFIBUS PA and Foundation Fieldbus interface
- Infinitely adjustable span from 0.03 bar g to 16 bar g (0.43 psi g to 232 psi g) for SITRANS P300 with HART interface
- Nominal measuring range from 1 bar g to 16 bar g (14.5 psi g to 232 psi g) for SITRANS P300 with PROFIBUS PA interface
- High measuring accuracy
- Parameterization over control keys and HART interface, or over PROFIBUS PA or Foundation Fieldbus interface (DS III only).
Ответ от производителя может занять до 5 дней и более.
