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Description
The measuring STRING system is intended for measurement of level, temperature, density, pressure, weight, calculation of volume of light oil products and the liquefied gas (SUG) in one - wall and double - walled tanks, - alarm systems of existence and measurement of level commercial - waters, increases in fire and ecological safety. It is applied to automation of processes of the accounting of oil products at gas station, AGZS, oil depots (NB), the enterprises of food and chemical industry. -
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The level gage the String conforms to requirements imposed to especially explosion - proof electric equipment of subgroup of IIB with a type of explosion protection "An intrinsically safe electric chain of the ia level" according to GOST P 51330.0 - 99 and GOST P 51330.10 - 99. The system is registered in - the State register of measuring instruments (the certificate of Gosstandart of the Russian Federation)
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The system of measurement the String can be used practically with all known systems of a holiday of oil products and is easily integrated into the industrial control system complexes of the enterprises, systems of data collection and processing.
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Use of System of measurement the STRING allows:
- To carry out high - precision remote measurement of level, density, temperature, - pressure and the mass of liquid environments, including food and explosive liquids (gasolines, DT, oils, alcohols, kerosene, the liquefied gas, gas condensate, solvents, etc. ),
- It is essential to reduce time - delivery and acceptance of changes and to automate work of service personnel of gas station, AGZS, oil depots,
- To carry out detailed control of the movement of oil products and SUG in systems of the commercial account, -
- To display results of measurement and calculation of parameters on the independent indicator or to transfer information to computer system of the user on the standard RS - 232, RS - 485, USB interface,
- To connect to one central part of System - "STRING" with the independent block of indication from 1 to 16 sensors PCP (Primary Converters of Parameters) set in tanks,
- To carry out by several Systems - "STRING" monitoring of the reservoir park of oil depots and storages distributed on big squares,
- To control tanks with various heights (vzliv to 18 meters) and with various products one STRING system (for example MTAZS, oil depots with horizontal and vertical tanks, chemical productions, etc. )
- To carry out control and to establish automatic protection against a fuel modulation,
- To establish automatic protection of pumps against work "in dry",
- To realize standard requirements of ecological and fire safety,
- To signal existence or to continuously measure the level of commercial water,
- To automatically control tightness of tanks both one - wall, and double - walled,
- To control pressure or level of antifreeze in interwall space of double - walled tanks,
- To control dovzryvoopasny concentration of combustible gases and vapors (NKPR) with turning on of the alarm system and executive mechanisms.
- To measure pressure both in tanks, and in pipelines,
- To calculate the mass of a steam phase in tanks with SUG,
- To measure the mass of oil product or SUG by the certified techniques of performance of measurements (TPM),
- To carry out metrological checking without dismantle of the equipment,
- To use the obtained data of measurements in complex systems of the account, storage and a holiday of oil products, to organize the global corporate distributed systems of the account,
- To provide creation of completely automatic gas stations (AAZS),
- With application of the special software to carry out autocalibration of calibration tables of tanks,
- To use - the PPP metrological sensors in systems of graduation of tanks (PIGL).
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Technical - characteristics:
| - * - Range - measurements - level (without densitometer), mm | - from 120 - to 4000 |
| - * - Range - measurements - level (with the superficial densitometer), mm | - from 200 - to 4000 - |
| - * - Range - measurements - level (with the submersible densitometer), mm | - from 120 - to 18000 - |
| - * - Range - measurements - level (for graduation of tanks), mm | - from 10 to 4000 or |
| - | - from 10 to 9000 |
| - * Limits allowed absol. errors in the range up to 4 meters, mm | - ± 1, 0 |
| - * Limits allowed absol. errors in the range over 4 meters, mm - - - - - | - ± - 2, 0 |
| - * - ability, - mm | - 0, 1 |
| - * - range of operation of PPP, - - 0 C | - from - - 40 to + 55 |
| - * - allowed absol. errors - measurements of temperature, 0 C | - ± 0,5 |
| - * - measurements of density of kg/m3: | - |
| - - - - - - - - - - - 1 range (The liquefied gas) - - - - - | - from 499 to 599 |
| - - - - - - - - - - - 2 range (AI - 80) | - from 690 to 760 |
| - - - - - - - - - - - 3rd range (AI - 92, AI - 95, AI - 98) | - from 715 to 785 |
| - - - - - - - - - - - 4th range (DT) | - from 810 to 880 |
| - * - additional absol. errors - measurements of density ("poverkhnostn". ) kg/m3 | - ± 1,5 |
| - * Limits additional absol. errors - measurements of density ("submersible") - kg/m3 | - ± 1,0 |
| - * Limits of the allowed relative error of measurements | - |
| - - - - - - - - - - - (in accordance with GOST 8.595 - 2004): | - |
| - - - - - - - - - - - - the mass of oil product to 120 t, % (at most) | - ± - 0,65 ( * ± - 0,3 standard) |
| - - - - - - - - - - - - the mass of oil product from 120 t and more, % (at most) | - ± - 0,5 |
| - * - The alarm system of availability of commercial water at the level (for gas station), mm | - 25 |
| - * - Range - measurements - the level of commercial water (for NB), mm | - from 80 to 300 |
| - * - Limits additional absol. errors - measurements - water level (for NB), mm | - ± 1, 0 |
| - * - Range - measurements of excessive pressure, - MPa | - from 0 to 1,6 |
| - * - Limits of the additional given error - measurements of pressure, % | - ± 1,0 |
| - * - Quantity - controlled - tanks (one central part) | - to 16 |
| - * - Length - a cable from each tank to operator, not - more | - 1200 m |
| - * - Parameters of control paths in the Control Unit (CU): | - |
| - - - - - - - - - - - power chains (optosemistor) | - ~ 220V - (from 0,1 to 0,5A) |
| - - - - - - - - - power chains (dry contact) | - ~ 220V - (0,01 to 0,1A) |
| - - - - - - - - - - low - power relay chains (dry contact) |
- = 27V - (ot0,01 to 0,5A) |
| - * - System food | - 220V + 10 - 15% - 50 Hz, 0,6A |
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Structure of systems measuring "String":
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Central part:
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- Computer (UV) (case sizes 690kh380kh140mm. ), established in - the room and consisting from:
- - - - the block of computing (BC), - having - degree - explosion protection - ExiaIIB intended - for - collecting, - preliminary - transformations - and - processings - information - parameters - tanks (to - 16), - preparation - information - to - to representation - in - units - measurements and communications with external systems, computers, networks. - -
- - - - - the specialized the block - food - (BF), - having degree - explosion protection - ExiaIIB,
- - - - - blocks of the connectors of terminal (CT) intended for connection of cables from PPP.
- The Block — Indications (BI), desktop - executions, - established - indoors, is intended - for - representation of information to the operator on - the indicator about - parameters of oil products in tanks, issues of messages on a condition of system, and also for input from the keyboard of values of the set parameters and a task of operating modes. - The sizes - 190kh135kh52mm. -
- - Interblock cables, converters of interfaces and the ekpluatatsionny documentation (ED).
- The software for display and processing of the measured information on the computer.
Gross weight of the central part - 15 kg.
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Peripheral part:
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- Primary — the Converter — Parameters — (PCP) - with - sensors - level, - temperatures, - density, pressure - and - commercial - waters (by execution option). It is executed - in - explosion - proof - execution, having degree - explosion protection - ExiaIIB and - is established - in - tanks. By execution option, to 16 PPP on one central part. Weight is one PPP assembled: 1,5 kg + 1,5kg/on meter are long.
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- The Device — Managements — (DM), - which - is established - - in - - the room - and - is intended for - programmable turning on or switching off of annunciators (light, - sound), executive - mechanisms (valves, pumps), and also transfer of alarm information in automatic equipment cases. - UU case sizes - - 305kh178kh75mm. Weight is 1,2 kg.
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Files: |
The operation manual - -  - |
 - 4.54 MB |
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The operator guide - - - |
- 396.53 KB |
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The instruction for preparation of tables of graduation of tanks - - - |
- 266.11 KB |
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