INTERSTATE STANDARD
DESIGN DOCUMENTATION SYSTEM
FOR CONSTRUCTION
AUTOMATION OF TECHNOLOGICAL
PROCESSES
SYMBOLS OF DEVICES
AND AUTOMATION TOOLS IN DIAGRAMS
Date of introduction 01/01/86
This standard establishes the symbols of devices, automation equipment and communication lines used in the implementation of automation schemes technological processes, developed for the construction of enterprises, buildings and structures in all sectors of industry and the national economy.
1. LEGEND
1.1. Graphic symbols
1.1.1. Graphic designations of devices, automation equipment and communication lines must correspond to those given in table. 1.
Table 1
|
Name |
Designation |
|
1. Device installed outside the switchboard (on site): |
|
|
a) main designation |
|
|
b) acceptable designation |
|
|
2. Device installed on the panel, remote control: |
|
|
a) main designation |
|
|
b) acceptable designation |
|
|
3. Actuator. General designation |
|
|
4. An actuator that, when the power supply or control signal is interrupted: |
|
|
a) opens the regulatory body |
|
|
b) closes the regulatory body |
|
|
c) leaves the regulatory body in the same position |
|
|
5. Actuator with additional manual drive Note. The designation can be used with any of the additional signs characterizing the position of the regulatory body when the supply of energy or control signal is interrupted |
|
|
6. Communication line. General designation |
|
|
7. Crossing communication lines without connecting to each other |
|
|
8. Crossing communication lines with interconnection |
1.1.2. The selection device for all permanently connected devices is depicted as a solid thin line connecting the process pipeline or apparatus with the device (Fig. 1). If it is necessary to indicate the specific location of the sampling device (inside the contour of the technological apparatus), it is indicated by a circle with a diameter of 2 mm (Fig. 2).
1.2. Letter designations
1.2.1. Basic letter designations measured values and functional characteristics of devices must correspond to those given in table. 2.
table 2
|
Designated |
Measured quantity |
Functional characteristic of the device |
|||
|
Basic designation of the measured quantity |
Additional designation specifying the measured value |
Information display |
Output signal generation |
Additional meaning |
|
|
Signaling |
|||||
|
Automatic regulation, control |
|||||
|
Density |
Difference, difference |
||||
|
Electrical quantity (see clause 2.13) |
|||||
|
Ratio, fraction, fraction |
|||||
|
Size, position, movement |
|||||
|
Manual impact |
Upper limit of measured value |
||||
|
Indication |
|||||
|
Automatic switching, running around |
|||||
|
Time, time program |
|||||
|
Lower limit of measured value |
|||||
|
Humidity |
|||||
|
Pressure, vacuum |
|||||
|
A quantity characterizing quality: composition, concentration, etc. (see clause 2.13) |
Integration, summation over time |
||||
|
Radioactivity (see paragraph 2.13) |
Registration |
||||
|
Speed, frequency |
Enable, disable, switch, block |
||||
|
Temperature |
|||||
|
Several heterogeneous measured quantities |
|||||
|
Viscosity |
|||||
Note. Letter designations marked with a “+” sign are reserved, and a “-” sign is not used.
1.2.2. Additional letter designations used to indicate additional functional characteristics of devices, signal converters and computing devices are given in Appendix 1.
1.3. Symbol sizes
1.3.1. The dimensions of the conventional graphic symbols of devices and automation equipment in the diagrams are given in Table. 3.
1.3.2. Conventional graphic symbols on the diagrams are made with a solid thick main line, and the horizontal dividing line inside the graphic symbol and communication line is made with a solid thin line according to GOST 2.303.
1.3.3. The font of letter designations is accepted as 2.5 mm according to GOST 2.304.
Table 3
2. RULES FOR CONSTRUCTING CONVENTIONS
2.1. This standard specifies two methods for constructing symbols:
a) simplified;
b) expanded.
2.2. With the simplified construction method, devices and automation equipment that perform complex functions, such as control, regulation, signaling and are made in the form of separate blocks, are represented by one symbol. In this case, primary measuring transducers and all auxiliary equipment are not depicted.
2.3. With the expanded construction method, each device or unit included in a single measuring, regulating or control set of automation equipment is indicated by a separate symbol.
2.4. Symbols of devices and automation equipment used in diagrams include graphic, alphabetic and numerical symbols.
At the top of the graphic designation, letter designations of the measured quantity and the functional characteristic of the device are applied, which determines its purpose.
At the bottom of the graphic designation, a digital (positional) designation of a device or a set of automation equipment is applied.
2.5. The order of letters in the letter designation is taken as follows:
Additional designation of the measured value (if necessary);
Designation of a functional feature of the device.
2.6. When designing automation equipment kits, the first letter in the designation of each instrument or device included in the kit (except for manual control devices) is the name of the quantity measured by the kit.
2.7. The letter designations of devices made in the form of separate blocks and intended for manual operations, regardless of which kit they are included in, must begin with the letter N.
2.8. The order of arrangement of letter designations of the functional characteristics of the device is taken in compliance with the sequence of designations: I, R, C, S, A.
2.9. When constructing letter designations, not all functional features of the device are indicated, but only those that are used in a given circuit.
2.10. Letter A is used to denote the “alarm” function, regardless of whether the signaling equipment is placed on any panel or whether lamps built into the device itself are used for signaling.
2.11. Letter S used to designate the contact device of a device used only for turning on, turning off, switching, blocking.
When using a device contact device for switching on, switching off and at the same time for signaling, both letters are used in the designation of the device: S And A.
2.12. The limit values of the measured quantities, which are used, for example, for turning on, shutting down, blocking, signaling, can be specified by adding letters N And L. These letters are placed to the right of the graphic designation.
2.13. If it is necessary to specify the measured value, it is allowed to indicate the name or symbol of this value to the right of the graphic designation of the device.
2.14. To designate quantities not provided for by this standard, reserve letters may be used. The use of reserve letters must be deciphered in the diagram.
2.15. The connection of communication lines to the device is shown at any point of the graphic designation (top, bottom, side). If it is necessary to indicate the direction of signal transmission, arrows are placed on communication lines.
2.16. The principle of constructing the symbol of the device is shown in Fig. 3.
The principle of constructing a symbol for a device
2.17. Examples of constructing symbols for devices and automation equipment are given in Appendix 2.
ANNEX 1
ADDITIONAL LETTER DESIGNATIONS USED TO INDICATE ADDITIONAL FUNCTIONAL FEATURES OF DEVICES, SIGNAL CONVERTERS AND COMPUTING DEVICES
1. Additional letter designations reflecting the functional characteristics of the devices are given in table. 1.
Table 1
|
Name |
Designation |
Purpose |
|
Sensing element |
Devices that perform primary conversion: thermoelectric converters, resistance thermal converters, pyrometer sensors, flow meter restrictors, etc. |
|
|
Remote transmission |
Scaleless instruments with remote signal transmission: pressure gauges, differential pressure gauges, pressure gauge thermometers |
|
|
Control station |
Devices that have a switch for selecting the type of control and a device for remote control |
|
|
Conversion, computational functions |
To construct symbols for signal converters and computing devices |
2. Additional letter designations used to construct signal converters and computing devices are given in Table. 2.
table 2
|
Name |
Designation |
|
1. Type of signal energy: |
|
|
Electric |
|
|
Pneumatic |
|
|
Hydraulic |
|
|
2. Types of waveforms: |
|
|
Analog |
|
|
Discrete |
|
|
3. Operations performed by a computing device: |
|
|
Summation |
|
|
Multiplying a signal by a constant factor k |
|
|
Multiplying two or more signals by each other |
|
|
Dividing signals into each other |
|
|
Signal magnitude construction f to the degree n |
|
|
Extracting the root of the power from the magnitude of the signal n |
|
|
Logarithm |
|
|
Differentiation |
|
|
Integration |
|
|
Signal change |
|
|
Signal upper limit |
|
|
Signal lower limit |
|
|
4. Communication with the computer complex: |
|
|
Transmitting a signal to a computer |
|
|
Outputting information from a computer |
3. The order of constructing symbols using additional letters is adopted as follows:
The main designation of the measured quantity;
One of the additional letters: E, T, K or Y.
4. When constructing symbols for signal converters and computing devices, inscriptions defining the type of conversion or operation performed by the computing device are placed to the right of the graphic designation of the device.
APPENDIX 2
Information
EXAMPLES OF CONSTRUCTING SYMBOLS OF DEVICES AND AUTOMATION FEATURES
|
Designation |
Name |
|
|
Primary measuring transducer (sensing element) for temperature measurement, installed on site. For example: thermoelectric converter (thermocouple), resistance temperature converter, thermal cylinder of a manometric thermometer, pyrometer sensor, etc. |
||
|
A device for measuring temperature indicating, installed locally. For example: mercury thermometer, manometric thermometer, etc. |
||
|
An indicating device for measuring temperature installed on a panel. For example: millivoltmeter, ratiometer, potentiometer, automatic bridge, etc. |
||
|
A scaleless temperature measuring device with remote transmission of readings, installed locally. For example: a pressure gauge thermometer (or any other temperature sensor), scaleless with pneumatic or electric transmission |
||
|
A single-point temperature measuring device, recording, installed on a panel. For example: recording millivoltmeter, ratiometer, potentiometer, automatic bridge, etc. |
||
|
A device for measuring temperature with an automatic running device, recording, installed on a panel. For example: multi-point recording potentiometer, automatic bridge, etc. |
||
|
Temperature measuring device, recording, regulating, installed on the panel. For example: any self-recording temperature controller (manometric thermometer, millivoltmeter, ratiometer, potentiometer, automatic bridge, etc.) |
||
|
The temperature regulator is scaleless, installed locally. For example: dilatometric temperature controller |
||
|
A set for temperature measurement, recording, regulating, equipped with a control station, installed on the panel. For example: secondary device and control unit of the “Start” system |
||
|
A scaleless temperature measuring device with a contact device, installed locally. For example: temperature relay |
||
|
Bypass remote control panel mounted on panel |
||
|
Switch for electrical measurement (control) circuits, switch for gas (air) lines, installed on the panel |
||
|
A device for measuring pressure (vacuum), indicating, installed locally. For example: any indicating pressure gauge, differential pressure gauge, draft gauge, pressure gauge, vacuum gauge, etc. |
||
|
A device for measuring differential pressure indicating, installed locally. For example: a differential pressure gauge showing |
||
|
A device for measuring pressure (vacuum), scaleless, with remote transmission of readings, installed locally. For example: scaleless pressure gauge (differential pressure gauge) with pneumatic or electric transmission |
||
|
A recording device for measuring pressure (vacuum), installed on the panel. For example: a pressure gauge or any secondary pressure recording device |
||
|
Pressure measuring instrument with contact device installed on site. For example: pressure switch |
||
|
A device for measuring pressure (vacuum) indicating with a contact device, installed locally. For example: electric contact pressure gauge, vacuum gauge, etc. |
||
|
A pressure regulator that operates without the use of an external energy source (direct-acting pressure regulator) “to itself.” |
||
|
Field-installed primary flow sensor (sensing element) for flow measurement. For example: diaphragm, nozzle, Venturi tube, induction flow meter sensor, etc. |
||
|
A scaleless flow measuring device with remote transmission of readings, installed locally. For example: differential pressure gauge (rotameter), scaleless with pneumatic or electric transmission |
||
|
A recording device for measuring the flow ratio, installed on the switchboard. For example: any secondary device for recording flow ratios |
||
|
An indicating device for measuring flow, installed locally. For example: a differential manometer (rotameter), showing |
||
|
Integrating flow measuring device installed on site. For example: any scale-free flow meter with an integrator |
||
|
A device for measuring flow, indicating, integrating, installed locally. For example: indicating differential pressure gauge with integrator |
||
|
An integrating device for measuring flow, with a device for issuing a signal after the passage of a given amount of substance, installed locally. For example: dispenser counter |
||
|
Primary measuring transducer (sensing element) for level measurement, installed on site. For example: electrical or capacitive level sensor |
||
|
An indicating level measuring device installed locally. For example: a pressure gauge (differential pressure gauge) used to measure level |
||
|
Level measuring instrument with contact device installed on site. For example: level relay used for interlocking and high level alarm |
||
|
The device for measuring level is scaleless, with remote transmission of readings, installed locally. For example: scaleless level gauge with pneumatic or electric transmission |
||
|
A level measuring device is scaleless, regulating, with a contact device, installed locally. For example: an electric level switch. Letter N in this example means blocking at the top level |
||
|
A level measuring device indicating, with a contact device, installed on the panel. For example: a secondary indicating device with a signaling device. Letters N And L means high and low level alarm |
||
|
The device for measuring the density of a solution is scaleless, with remote transmission of readings, installed locally. For example: density meter sensor with pneumatic or electric transmission |
||
|
A device for measuring dimensions, indicating, installed in place. For example: an indicating device for measuring the thickness of a steel strip |
||
|
A device for measuring any electrical quantity, indicating, installed locally. |
||
|
For example: |
||
|
Voltage * |
||
|
Current * |
||
|
Power * |
||
|
A device for controlling a process according to a time program, installed on a panel. For example: command electro-pneumatic device (CEP), multi-circuit time relay |
||
|
A recording device for measuring humidity, installed on a panel. For example: secondary moisture meter device |
||
|
Primary measuring transducer (sensing element) for measuring product quality, installed on site. For example: pH meter sensor |
||
|
A device for measuring product quality indicating, installed locally. For example: a gas analyzer indicating for monitoring the oxygen content in flue gases |
||
|
A device for measuring product quality, recording, regulating, installed on a panel. For example: a secondary recording device for controlling the concentration of sulfuric acid in solution |
||
|
A device for measuring radioactivity indicating, with a contact device, installed in place. For example: a device for indicating and signaling maximum permissible concentrations of a- and b-rays |
||
|
A device for measuring drive rotation speed, recording, installed on the switchboard. For example: secondary tachogenerator device |
||
|
A recording device for measuring several different quantities, installed locally. For example: a self-recording differential pressure meter-flow meter with additional entry pressure. An inscription decoding the measured values is placed to the right of the device |
||
|
A device for measuring the viscosity of a solution, indicating, installed locally. For example: a viscometer showing |
||
|
A device for measuring the mass of a product indicating, with a contact device, installed in place. For example: an electronic strain gauge device signaling |
||
|
The device for monitoring the extinguishing of the torch in the furnace is scaleless, with a contact device, installed on the panel. For example: a secondary device of an ignition protection device. Using a fallback letter IN must be specified on the diagram field |
||
|
Signal converter installed on the switchboard. The input signal is electrical, the output signal is also electrical. For example: a measuring transducer used to convert t.e.m.f. thermoelectric thermometer into signal direct current |
||
|
Field-installed signal converter. Input signal is pneumatic, output signal is electric |
||
|
A computing device that performs a multiplication function. For example: multiplier by constant coefficient TO |
||
|
Starting equipment for controlling the electric motor (turning on and off the pump; opening and closing the valve, etc.). For example: magnetic starter, contactor, etc. Using a fallback letter N must be specified on the diagram field |
||
|
Equipment designed for manual remote control (turning on and off the engine; opening, closing a shut-off valve, changing the regulator’s task), installed on the switchboard. For example: button, control key, dial |
||
|
Equipment designed for manual remote control, equipped with an alarm device, installed on a switchboard. For example: a button with a built-in light, an illuminated control key, etc. |
* Inscriptions deciphering the specific measured electrical quantity, placed either next to the device or in the form of a table on the drawing field.
INFORMATION DATA
1. DEVELOPED by the Ministry of Installation and Special Construction Works of the USSR, the Ministry of Instrument Making, Automation and Control Systems
INTRODUCED by the Ministry of Installation and Special Construction Works of the USSR
2. APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Construction Affairs dated April 18, 1985 No. 49
3. INTRODUCED FOR THE FIRST TIME
4. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS
5. REPUBLICATION. July 2007
GOST 21.404-85
Group Zh01
STATE STANDARD OF THE USSR UNION
System of design documentation for construction
AUTOMATION
TECHNOLOGICAL PROCESSES
Symbols of devices
and automation tools in diagrams
System of design documents for construction. Industrial
process automation. Instrumentation symbols for use
in diagrams
Date of introduction 1986-01-01
APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Construction Affairs dated April 18, 1985 N 49
REISSUE. March 1987
This standard establishes the symbols of devices, automation equipment and communication lines used in the implementation of automation schemes for technological processes developed for the construction of enterprises, buildings and structures in all sectors of industry and the national economy.
1. Legend
1.1. Graphic symbols
Graphic designations of devices, automation equipment and communication lines must correspond to those given in Table 1.
Table 1
|
Name |
Designation |
|
|
Device installed outside the switchboard (on site): a) main designation b) acceptable designation | ||
|
Device installed on the panel, remote control: a) main designation b) acceptable designation | ||
|
Actuating mechanism. General designation | ||
|
An actuator which, upon loss of power or control signal: a) opens the regulatory body b) closes the regulatory body c) leaves the regulatory body in the same position | ||
|
Actuator with additional manual drive Note. The designation can be used with any of the additional signs characterizing the position of the regulatory body when the supply of energy or control signal is interrupted | ||
|
Communication line. General designation | ||
|
Crossing communication lines without connecting to each other | ||
|
Crossing communication lines with interconnection |
1.1.2. The selection device for all permanently connected devices is depicted as a solid thin line connecting the process pipeline or apparatus with the device (Fig. 1). If it is necessary to indicate the specific location of the sampling device (inside the contour of the technological apparatus), it is indicated by a circle with a diameter of 2 mm (Fig. 2).
Crap. 1 Damn. 2
1.2. Letter designations
1.2.1. The main letter designations of measured quantities and functional characteristics of devices must correspond to those given in table. 2
table 2
|
Designation |
Measured quantity |
Functional characteristic of the device |
|||
|
Basic designation of the measured quantity |
Additional designation specifying the measured value |
Information display |
Output signal generation |
Additional meaning |
|
|
Signaling | |||||
|
Automatic regulation, control | |||||
|
Density |
Difference, difference | ||||
|
Electrical quantity (see clause 2.13) | |||||
|
Ratio, fraction, fraction | |||||
|
Size, position, movement | |||||
|
Manual impact |
Upper limit of measured value |
||||
|
Indication | |||||
|
Automatic switching, running around | |||||
|
Time, time program | |||||
|
Lower limit of measured value |
|||||
|
Humidity | |||||
|
Pressure, vacuum | |||||
|
A quantity characterizing quality: composition, concentration, etc. (see clause 2.13) |
Integration, summation over time | ||||
|
Radioactivity (see paragraph 2.13) |
Registration | ||||
|
Speed, frequency |
Enable, disable, switch, block | ||||
|
Temperature | |||||
|
Several heterogeneous measured quantities | |||||
|
Viscosity | |||||
Note. Letter designations marked with a “+” sign are reserved, and those marked with a “” sign are not used.
1.2.2. Additional letter designations used to indicate additional functional characteristics of devices, signal converters and computing devices are given in recommended Appendix 1.
1.3. Symbol sizes
1.3.1. The dimensions of the conventional graphic symbols of devices and automation equipment in the diagrams are given in Table. 3.
1.3.2. Conventional graphic symbols on the diagrams are made with a solid thick main line, and the horizontal dividing line inside the graphic symbol and communication line is made with a solid thin line according to GOST 2.303-68.
GOST 21.404-85
INTERSTATE STANDARD
DESIGN DOCUMENTATION SYSTEM
FOR CONSTRUCTION
AUTOMATION OF TECHNOLOGICAL
PROCESSES
SYMBOLS OF DEVICES
AND AUTOMATION TOOLS IN DIAGRAMS
Date of introduction 01.01.86
This standard establishes the symbols of devices, automation equipment and communication lines used in the implementation of automation schemes for technological processes developed for the construction of enterprises, buildings and structures in all sectors of industry and the national economy.
1. LEGEND
1.1. Graphic symbols
1.1.1. Graphic designations of devices, automation equipment and communication lines must correspond to those given in table. .
Table 1
|
Designation |
|
|
1. Device installed outside the switchboard (on site): |
|
|
a) main designation |
|
|
b) acceptable designation |
|
|
2. Device installed on the panel, remote control: |
|
|
a) main designation |
|
|
b) acceptable designation |
|
|
3. Actuator. General designation |
|
|
4. An actuator that, when the power supply or control signal is interrupted: |
|
|
a) opens the regulatory body |
|
|
b) closes the regulatory body |
|
|
c) leaves the regulatory body in the same position |
|
|
5. Actuator with additional manual drive Note: The designation can be used with any of the additional signs characterizing the position of the regulatory body when the supply of energy or control signal is interrupted |
|
|
6. Communication line. General designation |
|
|
7. Crossing communication lines without connecting to each other |
|
|
8. Crossing communication lines with interconnection |
1.1.2. The selection device for all permanently connected devices is depicted as a solid thin line connecting the process pipeline or apparatus with the device (Fig. ). If it is necessary to indicate the specific location of the sampling device (inside the contour of the technological apparatus), it is indicated by a circle with a diameter of 2 mm (Fig. ).
1.2. Letter designations
1.2.1. The main letter designations of measured quantities and functional characteristics of devices must correspond to those given in table. .
Table 2
|
Measured quantity |
Functional characteristic of the device |
||||
|
Basic designation of the measured quantity |
Additional designation specifying the measured value |
Information display |
Output signal generation |
Additional meaning |
|
|
A |
Signaling |
||||
|
Automatic regulation, control |
|||||
|
Density |
Difference, difference |
||||
|
Electrical quantity (see paragraph) |
|||||
|
Ratio, fraction, fraction |
|||||
|
Size, position, movement |
|||||
|
Manual impact |
Upper limit of measured value |
||||
|
Indication |
|||||
|
Automatic switching, running around |
|||||
|
Time, time program |
|||||
|
Lower limit of measured value |
|||||
|
Humidity |
|||||
|
Pressure, vacuum |
|||||
|
A quantity characterizing quality: composition, concentration, etc. (see paragraph) |
Integration, summation over time |
||||
|
Registration |
|||||
|
Speed, frequency |
Enable, disable, switch, block |
||||
|
Temperature |
|||||
|
Several heterogeneous measured quantities |
|||||
|
Viscosity |
|||||
Note: Letter designations marked with a “+” sign are reserved, and a “-” sign is not used.
1.2.2. Additional letter designations used to indicate additional functional characteristics of instruments, signal converters and computing devices are given in the Appendix.
1.3. Symbol sizes
1.3.1. The dimensions of the conventional graphic symbols of devices and automation equipment in the diagrams are given in Table. .
Designation
a) main designation
b) acceptable designation
Actuating mechanism
2. RULES FOR CONSTRUCTING CONVENTIONS
2.1. This standard specifies two methods for constructing symbols:
a) simplified;
b) expanded.
2.2. With the simplified construction method, devices and automation equipment that perform complex functions, such as control, regulation, signaling and are made in the form of separate blocks, are represented by one symbol. In this case, primary measuring transducers and all auxiliary equipment are not depicted.
2.3. With the expanded construction method, each device or unit included in a single measuring, regulating or control set of automation equipment is indicated by a separate symbol.
2.4. Symbols of devices and automation equipment used in diagrams include graphic, alphabetic and numerical symbols.
At the top of the graphic designation, letter designations of the measured quantity and the functional characteristic of the device are applied, which determines its purpose.
At the bottom of the graphic designation, a digital (positional) designation of a device or a set of automation equipment is applied.
2.5. The order of letters in the letter designation is taken as follows:
Additional designation of the measured value (if necessary);
Designation of a functional feature of the device.
2.6. When designing automation equipment kits, the first letter in the designation of each instrument or device included in the kit (except for manual control devices) is the name of the quantity measured by the kit.
2.7. The letter designations of devices made in the form of separate blocks and intended for manual operations, regardless of which kit they are included in, must begin with the letter N.
2.8. The order of arrangement of letter designations of the functional characteristics of the device is taken in compliance with the sequence of designations:I, R, C, S, A.
2.9. When constructing letter designations, not all functional features of the device are indicated, but only those that are used in a given circuit.
2.10. Letter A is used to denote the “alarm” function, regardless of whether the signaling equipment is placed on any panel or whether lamps built into the device itself are used for signaling.
2.11. Letter Sused to designate the contact device of a device used only for turning on, turning off, switching, blocking.
When using a device contact device for switching on, switching off and at the same time for signaling, both letters are used in the designation of the device:S And A.
2.12. The limit values of the measured quantities, which are used, for example, for turning on, shutting down, blocking, signaling, can be specified by adding letters N AndL.These letters are placed to the right of the graphic designation.
2.14. To designate quantities not provided for by this standard, reserve letters may be used. The use of reserve letters must be deciphered in the diagram.
2.15. The connection of communication lines to the device is shown at any point of the graphic designation (top, bottom, side). If it is necessary to indicate the direction of signal transmission, arrows are placed on communication lines.
2.16. The principle of constructing the symbol of the device is shown in Fig. .
The principle of constructing a symbol for a device
Crap. 3
2.17. Examples of constructing symbols for devices and automation equipment are given in the Appendix.
ANNEX 1
ADDITIONAL LETTER DESIGNATIONS USED TO INDICATE ADDITIONAL FUNCTIONAL FEATURES OF DEVICES, SIGNAL CONVERTERS AND COMPUTING DEVICES
1. Additional letter designations reflecting the functional characteristics of the devices are given in table. .
Table 1
|
Designation |
Purpose |
|
|
Sensing element |
Devices that perform primary conversion: thermoelectric converters, resistance thermal converters, pyrometer sensors, flow meter restrictors, etc. |
|
|
Remote transmission |
Scaleless instruments with remote signal transmission: pressure gauges, differential pressure gauges, pressure gauge thermometers |
|
|
Control station |
Devices having a switch for selecting the type of control and a device for remote control |
|
|
Conversion, computational functions |
To construct symbols for signal converters and computing devices |
2. Additional letter designations used to construct signal converters and computing devices are given in Table. .
Table 2
|
Designation |
|
|
1. Type of signal energy: |
|
|
Electric |
|
|
Pneumatic |
|
|
Hydraulic |
|
|
2. Types of waveforms: |
|
|
Analog |
|
|
Discrete |
|
|
3. Operations performed by a computing device: |
|
|
Summation |
|
|
Multiplying a signal by a constant factor k |
|
|
Multiplying two or more signals by each other |
|
|
Dividing signals into each other |
|
|
Signal magnitude construction f to the degree n |
|
|
Extracting the root of the power from the magnitude of the signal n |
|
|
Logarithm |
|
|
Differentiation |
|
|
Integration |
|
|
Signal change |
|
|
Signal upper limit |
|
|
Signal lower limit |
|
|
4. Communication with the computer complex: |
|
|
Transmitting a signal to a computer |
|
|
Outputting information from a computer |
3. The order of constructing symbols using additional letters is adopted as follows:
The main designation of the measured quantity;
One of the additional letters: E, T, K orY.
4. When constructing symbols for signal converters and computing devices, inscriptions defining the type of conversion or operation performed by the computing device are placed to the right of the graphic designation of the device.
APPENDIX 2
Information
EXAMPLES OF CONSTRUCTING SYMBOLS OF DEVICES AND AUTOMATION FEATURES
|
Designation |
Name |
|
|
Primary measuring transducer (sensing element) for temperature measurement, installed on site. For example: thermoelectric converter (thermocouple), resistance temperature converter, thermal cylinder of a manometric thermometer, pyrometer sensor, etc. |
||
|
A device for measuring temperature indicating, installed locally. For example: mercury thermometer, manometric thermometer, etc. |
||
|
An indicating device for measuring temperature installed on a panel. For example: millivoltmeter, ratiometer, potentiometer, automatic bridge, etc. |
||
|
A scaleless temperature measuring device with remote transmission of readings, installed locally. For example: a pressure gauge thermometer (or any other temperature sensor), scaleless with pneumatic or electric transmission |
||
|
A single-point temperature measuring device, recording, installed on a panel. For example: recording millivoltmeter, ratiometer, potentiometer, automatic bridge, etc. |
||
|
A device for measuring temperature with an automatic running device, recording, installed on a panel. For example: multi-point recording potentiometer, automatic bridge, etc. |
||
|
Temperature measuring device, recording, regulating, installed on the panel. For example: any self-recording temperature controller (manometric thermometer, millivoltmeter, ratiometer, potentiometer, automatic bridge, etc.) |
||
|
The temperature regulator is scaleless, installed locally. For example: dilatometric temperature controller |
||
|
A set for temperature measurement, recording, regulating, equipped with a control station, installed on the panel. For example: secondary device and control unit of the “Start” system |
||
|
A scaleless temperature measuring device with a contact device, installed locally. For example: temperature relay |
||
|
Bypass remote control panel mounted on panel |
||
|
Switch for electrical measurement (control) circuits, switch for gas (air) lines, installed on the panel |
||
|
A device for measuring pressure (vacuum), indicating, installed locally. For example: any indicating pressure gauge, differential pressure gauge, draft gauge, pressure gauge, vacuum gauge, etc. |
||
|
A device for measuring differential pressure indicating, installed locally. For example: a differential pressure gauge showing |
||
|
A device for measuring pressure (vacuum), scaleless, with remote transmission of readings, installed locally. For example: scaleless pressure gauge (differential pressure gauge) with pneumatic or electric transmission |
||
|
A recording device for measuring pressure (vacuum), installed on the panel. For example: a pressure gauge or any secondary pressure recording device |
||
|
Pressure measuring instrument with contact device installed on site. For example: pressure switch |
||
|
A device for measuring pressure (vacuum) indicating with a contact device, installed locally. For example: electric contact pressure gauge, vacuum gauge, etc. |
||
|
|
A pressure regulator that operates without the use of an external energy source (direct-acting pressure regulator) “to itself.” |
|
|
Field-installed primary flow sensor (sensing element) for flow measurement. For example: diaphragm, nozzle, Venturi tube, induction flow meter sensor, etc. |
||
|
A scaleless flow measuring device with remote transmission of readings, installed locally. For example: differential pressure gauge (rotameter), scaleless with pneumatic or electric transmission |
||
|
A recording device for measuring the flow ratio, installed on the switchboard. For example: any secondary device for recording flow ratios |
||
|
An indicating device for measuring flow, installed locally. For example: a differential manometer (rotameter), showing |
||
|
Integrating flow measuring device installed on site. For example: any scale-free flow meter with an integrator |
||
|
A device for measuring flow, indicating, integrating, installed locally. For example: indicating differential pressure gauge with integrator |
||
|
An integrating device for measuring flow, with a device for issuing a signal after the passage of a given amount of substance, installed locally. For example: dispenser counter |
||
|
Primary measuring transducer (sensing element) for level measurement, installed on site. For example: electrical or capacitive level sensor |
||
|
An indicating level measuring device installed locally. For example: a pressure gauge (differential pressure gauge) used to measure level |
||
|
Level measuring instrument with contact device installed on site. For example: level relay used for interlocking and high level alarm |
||
|
The device for measuring level is scaleless, with remote transmission of readings, installed locally. For example: scaleless level gauge with pneumatic or electric transmission |
||
|
A level measuring device is scaleless, regulating, with a contact device, installed locally. For example: an electric level switch. Letter N in this example means blocking at the top level |
||
|
A level measuring device indicating, with a contact device, installed on the panel. For example: a secondary indicating device with a signaling device. Letters N And L means high and low level alarm |
||
|
The device for measuring the density of a solution is scaleless, with remote transmission of readings, installed locally. For example: density meter sensor with pneumatic or electric transmission |
||
|
A device for measuring dimensions, indicating, installed in place. For example: an indicating device for measuring the thickness of a steel strip |
||
|
A device for measuring any electrical quantity, indicating, installed locally. |
||
|
For example: |
||
|
Voltage * |
||
|
Current * |
||
|
Power * |
||
|
A device for controlling a process according to a time program, installed on a panel. For example: command electro-pneumatic device (CEP), multi-circuit time relay |
||
|
A recording device for measuring humidity, installed on a panel. For example: secondary moisture meter device |
||
|
Primary measuring transducer (sensing element) for measuring product quality, installed on site. For example: pH meter sensor |
||
|
A device for measuring product quality indicating, installed locally. For example: a gas analyzer indicating for monitoring the oxygen content in flue gases |
||
|
A device for measuring product quality, recording, regulating, installed on a panel. For example: a secondary recording device for controlling the concentration of sulfuric acid in solution |
||
|
A device for measuring radioactivity indicating, with a contact device, installed in place. For example: a device for indicating and signaling maximum permissible concentrations a- And b-rays |
||
|
A device for measuring drive rotation speed, recording, installed on the switchboard. For example: secondary tachogenerator device |
||
|
A recording device for measuring several different quantities, installed locally. For example: a self-recording differential pressure meter-flow meter with additional pressure recording. An inscription decoding the measured values is placed to the right of the device |
||
|
A device for measuring the viscosity of a solution, indicating, installed locally. For example: a viscometer showing |
||
|
A device for measuring the mass of a product indicating, with a contact device, installed in place. For example: an electronic strain gauge device signaling |
||
|
The device for monitoring the extinguishing of the torch in the furnace is scaleless, with a contact device, installed on the panel. For example: a secondary device of an ignition protection device. Using a fallback letter IN must be specified on the diagram field |
||
|
Signal converter installed on the switchboard. The input signal is electrical, the output signal is also electrical. For example: a measuring transducer used to convert t.e.m.f. thermoelectric thermometer into DC signal |
||
|
Field-installed signal converter. Input signal is pneumatic, output signal is electric |
||
|
A computing device that performs a multiplication function. For example: multiplier by constant coefficient TO |
||
|
Starting equipment for controlling the electric motor (turning on and off the pump; opening and closing the valve, etc.). For example: magnetic starter, contactor, etc. Using a fallback letter N must be specified on the diagram field |
||
|
Equipment designed for manual remote control (turning on and off the engine; opening, closing a shut-off valve, changing the regulator’s task), installed on the switchboard. For example: button, control key, dial |
||
|
Equipment designed for manual remote control, equipped with an alarm device, installed on a switchboard. For example: a button with a built-in light, an illuminated control key, etc. |
* Inscriptions deciphering a specific measured electrical quantity are placed either next to the device or in the form of a table in the field of the drawing.
INFORMATION DATA
1. DEVELOPED by the Ministry of Installation and Special Construction Works of the USSR, the Ministry of Instrument Making, Automation and Control Systems
INTRODUCED by the Ministry of Installation and Special Construction Works of the USSR
2. APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Construction Affairs dated April 18, 1985 No. 49
3. INTRODUCED FOR THE FIRST TIME
4. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS
5. REPUBLICATION. July 2007
GOST 21.404-85
INTERSTATE STANDARD
SYSTEM OF DESIGN DOCUMENTS FOR CONSTRUCTION
AUTOMATION OF TECHNOLOGICAL
PROCESSES
SYMBOLS OF DEVICES AND AUTOMATION FEATURES IN THE DIAGRAMS
Official publication
Standardinform
INTERSTATE STANDARD
System of design documents for construction
AUTOMATION OF TECHNOLOGICAL
GOST PROCESSES
Symbols of devices and automation equipment
System of design documents for construction. Industrial process automation. Instrumentation symbols for use in diagrams
MKS01.080.30 OKSTU 0021
Date of introduction 01/01/86
This standard establishes the symbols of devices, automation equipment and communication lines used in the implementation of automation schemes for technological processes developed for the construction of enterprises, buildings and structures in all sectors of industry and the national economy.
1. LEGEND
1.1. Graphic symbols
1.1.1. Graphic designations of devices, automation equipment and communication lines must correspond to those given in table. 1.
Table 1
Official publication Reproduction prohibited
© Standards Publishing House, 1987 © Standartinform, 2007
Continuation of the table. 1
Name
4. An actuator that, when the power supply or control signal is interrupted:
a) opens the regulatory body
b) closes the regulatory body
Designation
?
?
c) leaves the regulatory body in the same position
5. Actuator with additional manual drive
And a note. The designation can be used with any of the additional signs characterizing the position of the regulatory body when the supply of energy or control signal is interrupted
6. Communication line. General designation
7. Crossing communication lines without connecting to each other
8. Crossing communication lines with interconnection
1.1.2. The selection device for all permanently connected devices is depicted as a solid thin line connecting the process pipeline or apparatus with the device (Fig. 1). If it is necessary to indicate the specific location of the sampling device (inside the contour of the technological apparatus), it is indicated by a circle with a diameter of 2 mm (Fig. 2).
1.2. Letter designations
1.2.1. The main letter designations of measured quantities and functional characteristics of devices must correspond to those given in table. 2.
table 2
Continuation of the table. 2
|
Measured quantity |
Functional characteristic of the device |
||||
|
Basic designation of the measured quantity |
Additional designation specifying the measured value |
Display information |
Output signal generation |
Additional meaning |
|
|
Density |
Difference, difference | ||||
|
Electrical quantity (see also 2.13) | |||||
|
Ratio, fraction, fraction | |||||
|
Size, position, movement | |||||
|
Manual impact |
Upper limit of measured value |
||||
|
Indication | |||||
|
Automatic switching, running around | |||||
|
Time, time program | |||||
|
Lower limit of measured value |
|||||
|
Humidity | |||||
|
Pressure, vacuum | |||||
|
A quantity characterizing quality: composition, concentration, etc. (see also 2.13) |
Integration, summation over time | ||||
|
Radioactivity (see section 2.13) |
Registration | ||||
|
Speed, frequency |
Enable, disable, switch, block | ||||
|
Temperature | |||||
|
Several heterogeneous measured quantities | |||||
|
Viscosity | |||||
Note: Letter designations marked with a “+” sign are reserved, and a “-” sign is not used.
1.2.2. Additional letter designations used to indicate additional functional characteristics of devices, signal converters and computing devices are given in Appendix 1.
1.3. Symbol sizes
1.3.1. The dimensions of the conventional graphic symbols of devices and automation equipment in the diagrams are given in Table. 3.
1.3.2. Conventional graphic symbols on the diagrams are made with a solid thick main line, and the horizontal dividing line inside the graphic symbol and communication line is made with a solid thin line according to GOST 2.303.
1.3.3. The font of letter designations is accepted as 2.5 mm according to GOST 2.304.
Table 3
a) main designation
Name
Designation
b) acceptable designation
Actuating mechanism
2. RULES FOR CONSTRUCTING CONVENTIONS
2.1. This standard specifies two methods for constructing symbols:
a) simplified;
b) expanded.
2.2. With the simplified construction method, devices and automation equipment that perform complex functions, such as control, regulation, signaling and are made in the form of separate blocks, are represented by one symbol. In this case, primary measuring transducers and all auxiliary equipment are not depicted.
2.3. With the expanded construction method, each device or unit included in a single measuring, regulating or control set of automation equipment is indicated by a separate symbol.
2.4. Symbols of devices and automation equipment used in diagrams include graphic, alphabetic and numerical symbols.
At the top of the graphic designation, letter designations of the measured quantity and the functional characteristic of the device are applied, which determines its purpose.
At the bottom of the graphic designation, a digital (positional) designation of a device or a set of automation equipment is applied.
2.5. The order of letters in the letter designation is taken as follows:
Additional designation of the measured value (if necessary);
Designation of a functional feature of the device.
2.6. When designing automation equipment kits, the first letter in the designation of each instrument or device included in the kit (except for manual control devices) is the name of the quantity measured by the kit.
2.7. The letter designations of devices made in the form of separate blocks and intended for manual operations, regardless of which kit they are included in, must begin with the letter N.
2.8. The order of arrangement of letter designations of the functional characteristics of the device is taken in compliance with the sequence of designations: /, R, C, S, A.
2.9. When constructing letter designations, not all functional features of the device are indicated, but only those that are used in a given circuit.
2.10. The letter A is used to designate the “alarm” function, regardless of whether the signaling equipment is placed on any panel or whether lamps built into the device itself are used for signaling.
2.11. The letter S is used to designate the contact device of the device, used only for turning on, turning off, switching, blocking.
When using a device contact device for switching on, switching off and at the same time for signaling, both letters are used in the designation of the device: S and A.
2.12. The limit values of the measured quantities, which are used, for example, to turn on, turn off, block, alarm, can be specified by adding the letters H and L. These letters are placed to the right of the graphic designation.
2.13. If it is necessary to specify the measured value, it is allowed to indicate the name or symbol of this value to the right of the graphic designation of the device.
2.14. To designate quantities not provided for by this standard, reserve letters may be used. The use of reserve letters must be deciphered in the diagram.
2.15. The connection of communication lines to the device is shown at any point of the graphic designation (top, bottom, side). If it is necessary to indicate the direction of signal transmission, arrows are placed on communication lines.
2.16. The principle of constructing the symbol of the device is shown in Fig. 3.
The principle of constructing a symbol for a device
P (Pressure)
D (Drop pressure)
regulation)
Sequence of VicVenical Meaning
Place for applying positional markings
2.17. Examples of constructing symbols for devices and automation equipment are given in Appendix 2.
ADDITIONAL LETTER DESIGNATIONS USED TO INDICATE ADDITIONAL FUNCTIONAL FEATURES OF DEVICES, SIGNAL CONVERTERS AND COMPUTING DEVICES
1. Additional letter designations reflecting the functional characteristics of the devices are given in table. 1.
Table 1
|
Name |
Designation |
Purpose |
|
Sensing element |
Devices that perform primary conversion: thermoelectric converters, resistance thermal converters, pyrometer sensors, flow meter restrictors, etc. |
|
|
Remote transmission |
Scaleless instruments with remote signal transmission: pressure gauges, differential pressure gauges, pressure gauge thermometers |
|
|
Control station |
Devices having a switch for selecting the type of control and a device for remote control |
|
|
Conversion, computational functions |
To construct symbols for signal converters and computing devices |
2. Additional letter designations used to construct signal converters and computing devices are given in Table. 2.
table 2
|
Name |
Designation |
|
1. Type of signal energy: | |
|
Electric | |
|
Pneumatic | |
|
Hydraulic | |
|
2. Types of waveforms: | |
|
Analog | |
|
Discrete | |
|
3. Operations performed by a computing device: | |
|
Summation | |
|
Multiplying the signal by a constant factor k | |
|
Multiplying two or more signals by each other | |
|
Dividing signals into each other | |
|
Raising the signal value / to the power n | |
|
Extracting the root of degree n from the signal value | |
|
Logarithm | |
|
Differentiation | |
|
Integration | |
|
Signal change | |
|
Signal upper limit | |
|
Signal lower limit | |
|
4. Communication with the computer complex: | |
|
Transmitting a signal to a computer | |
|
Outputting information from a computer |
3. The order of constructing symbols using additional letters is adopted as follows:
The main designation of the measured quantity;
One of the additional letters: E, T, K or K
4. When constructing symbols for signal converters and computing devices, inscriptions defining the type of conversion or operation performed by the computing device are placed to the right of the graphic designation of the device.
APPENDIX 2 Information
EXAMPLES OF CONSTRUCTING SYMBOLS OF DEVICES AND AUTOMATION FEATURES
|
Designation |
Name |
|
|
Primary measuring transducer (sensing element) for temperature measurement, installed on site. For example: thermoelectric converter (thermocouple), resistance temperature converter, thermal cylinder of a manometric thermometer, pyrometer sensor, etc. |
||
|
A device for measuring temperature indicating, installed locally. For example: mercury thermometer, manometric thermometer, etc. |
||
|
An indicating device for measuring temperature installed on a panel. For example: millivoltmeter, ratiometer, potentiometer, automatic bridge, etc. |
||
|
A scaleless temperature measuring device with remote transmission of readings, installed locally. For example: a pressure gauge thermometer (or any other temperature sensor), scaleless with pneumatic or electric transmission |
||
|
A single-point temperature measuring device, recording, installed on a panel. For example: recording millivoltmeter, ratiometer, potentiometer, automatic bridge, etc. |
||
|
A device for measuring temperature with an automatic running device, recording, installed on a panel. For example: multi-point recording potentiometer, automatic bridge, etc. |
||
|
Temperature measuring device, recording, regulating, installed on the panel. For example: any self-recording temperature controller (manometric thermometer, millivoltmeter, ratiometer, potentiometer, automatic bridge, etc.) |
||
|
The temperature regulator is scaleless, installed locally. For example: dilatometric temperature controller |
||
|
A set for temperature measurement, recording, regulating, equipped with a control station, installed on the panel. For example: secondary device and control unit of the “Start” system |
||
|
A scaleless temperature measuring device with a contact device, installed locally. For example: temperature relay |
||
|
Bypass remote control panel mounted on panel |
||
|
Switch for electrical measurement (control) circuits, switch for gas (air) lines, installed on the panel |
||
|
A device for measuring pressure (vacuum), indicating, installed locally. For example: any indicating pressure gauge, differential pressure gauge, draft gauge, pressure gauge, vacuum gauge, etc. |
||
|
A device for measuring differential pressure indicating, installed locally. For example: a differential pressure gauge showing |
Continuation
|
Designation |
Name |
|
|
A device for measuring pressure (vacuum), scaleless, with remote transmission of readings, installed locally. For example: scaleless pressure gauge (differential pressure gauge) with pneumatic or electric transmission |
||
|
A recording device for measuring pressure (vacuum), installed on the panel. For example: a pressure gauge or any secondary pressure recording device |
||
|
Pressure measuring instrument with contact device installed on site. For example: pressure switch |
||
|
A device for measuring pressure (vacuum) indicating with a contact device, installed locally. For example: electric contact pressure gauge, vacuum gauge, etc. |
||
|
A pressure regulator that operates without the use of an external energy source (direct-acting pressure regulator) “to itself.” |
||
|
Field-installed primary flow sensor (sensing element) for flow measurement. For example: diaphragm, nozzle, Venturi tube, induction flow meter sensor, etc. |
||
|
A scaleless flow measuring device with remote transmission of readings, installed locally. For example: differential pressure gauge (rotameter), scaleless with pneumatic or electric transmission |
||
|
A recording device for measuring the flow ratio, installed on the switchboard. For example: any secondary device for recording flow ratios |
||
|
An indicating device for measuring flow, installed locally. For example: a differential manometer (rotameter), showing |
||
|
Integrating flow measuring device installed on site. For example: any scale-free flow meter with an integrator |
||
|
A device for measuring flow, indicating, integrating, installed locally. For example: indicating differential pressure gauge with integrator |
||
|
An integrating device for measuring flow, with a device for issuing a signal after the passage of a given amount of substance, installed locally. For example: dispenser counter |
||
|
Primary measuring transducer (sensing element) for level measurement, installed on site. For example: electrical or capacitive level sensor |
||
|
An indicating level measuring device installed locally. For example: a pressure gauge (differential pressure gauge) used to measure level |
||
|
Level measuring instrument with contact device installed on site. For example: level relay used for interlocking and high level alarm |
Continuation
|
Designation |
Name |
|
|
The device for measuring level is scaleless, with remote transmission of readings, installed locally. For example: scaleless level gauge with pneumatic or electric transmission |
||
|
A level measuring device is scaleless, regulating, with a contact device, installed locally. For example: an electric level switch. The letter H in this example means blocking at the upper level |
||
|
A level measuring device indicating, with a contact device, installed on the panel. For example: a secondary indicating device with a signaling device. The letters Nzh L mean high and low level alarms |
||
|
The device for measuring the density of a solution is scaleless, with remote transmission of readings, installed locally. For example: density meter sensor with pneumatic or electric transmission |
||
|
A device for measuring dimensions, indicating, installed in place. For example: an indicating device for measuring the thickness of a steel strip |
||
|
A device for measuring any electrical quantity, indicating, installed locally. |
||
|
For example: Voltage* |
||
|
Current* |
||
|
Power* |
||
|
A device for controlling a process according to a time program, installed on a panel. For example: command electro-pneumatic device (CEP), multi-circuit time relay |
||
|
A recording device for measuring humidity, installed on a panel. For example: secondary moisture meter device |
||
|
Primary measuring transducer (sensing element) for measuring product quality, installed on site. For example: pH meter sensor |
||
|
A device for measuring product quality indicating, installed locally. For example: a gas analyzer indicating for monitoring the oxygen content in flue gases |
||
|
A device for measuring product quality, recording, regulating, installed on a panel. For example: a secondary recording device for controlling the concentration of sulfuric acid in solution |
||
|
A device for measuring radioactivity indicating, with a contact device, installed in place. For example: a device for indicating and signaling maximum permissible concentrations of a- and (3-rays |
* Inscriptions deciphering a specific measured electrical quantity are placed either next to the device or in the form of a table in the field of the drawing.
Continuation
|
Designation |
Name |
|
|
A device for measuring drive rotation speed, recording, installed on the switchboard. For example: secondary tachogenerator device |
||
|
A recording device for measuring several different quantities, installed locally. For example: a self-recording differential pressure meter-flow meter with additional pressure recording. An inscription decoding the measured values is placed to the right of the device |
||
|
A device for measuring the viscosity of a solution, indicating, installed locally. For example: a viscometer showing |
||
|
A device for measuring the mass of a product indicating, with a contact device, installed in place. For example: an electronic strain gauge device signaling |
||
|
The device for monitoring the extinguishing of the torch in the furnace is scaleless, with a contact device, installed on the panel. For example: a secondary device of an ignition protection device. The use of the reserve letter B must be indicated on the diagram field |
||
|
Signal converter installed on the switchboard. The input signal is electrical, the output signal is also electrical. For example: a measuring transducer used to convert i.e. d.s. thermoelectric thermometer into DC signal |
||
|
Field-installed signal converter. Input signal is pneumatic, output signal is electric |
||
|
A computing device that performs a multiplication function. For example: multiplier by constant coefficient K |
||
|
Starting equipment for controlling the electric motor (turning on and off the pump; opening and closing the valve, etc.). For example: magnetic starter, contactor, etc. The use of the reserve letter N must be indicated on the diagram field |
||
|
Equipment designed for manual remote control (turning on and off the engine; opening, closing a shut-off valve, changing the regulator’s task), installed on the switchboard. For example: button, control key, dial |
||
|
Equipment designed for manual remote control, equipped with an alarm device, installed on a switchboard. For example: a button with a built-in light, an illuminated control key, etc. |
INFORMATION DATA
1. DEVELOPED by the Ministry of Installation and Special Construction Works of the USSR, the Ministry of Instrument Making, Automation and Control Systems
INTRODUCED by the Ministry of Installation and Special Construction Works of the USSR
2. APPROVED AND ENTERED INTO EFFECT by Resolution of the USSR State Committee for Construction Affairs dated April 18, 1985 No. 49
3. INTRODUCED FOR THE FIRST TIME
4. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS
5. REPUBLICATION. July 2007
Editor V.N. Kopysov Technical editor L.A. Guseva Corrector R.A. Mentova Computer layout L.A. Circular
Signed in
print 07/25/2007. Format 60x8478. Offset paper. Times typeface. Uel. oven l. 1.40. Academic ed. l. 1.10. Circulation 73 copies. Zach. 617.
Offset printing.
FSUE "STANDARTINFORM", 123995 Moscow, Granatny per., 4. Typed in FSUE "STANDARTINFORM" on a PC.
Printed in the branch of FSUE "STANDARTINFORM" - type. “Moscow Printer”, 105062 Moscow, Lyalin lane, 6