Siemens
СРЕДСТВА ПРОМЫШЛЕННОЙ АВТОМАТИЗАЦИИ
официальный партнер Сименс
Каталог СА01 2014
архивный
(4872) 700-366
skenergo@mail.ru
ENG: Measuring setups with remote seals
Installation

Remote seals of sandwich design are fitted between the connection flange of the measuring point and a dummy flange. Remote seals of flange design are fitted directly on the connection flange of the measuring point. The respective pressure rating of the dummy flange or the flanged remote seal must be observed.

The pressure transmitter should be installed below the connection flange (and below the lower connection flange in the case of differential pressure transmitters). This arrangement must be used in the low-pressure range.

When measuring at pressures above atmospheric, the pressure transmitter can also be installed above the connection flange.

The capillaries between the remote seal and the pressure transmitter should be as short as possible to obtain a good transmission response.

Offset of measuring range

If there is a difference in height between the two connection flanges when measuring with two remote seals, an additional differential pressure will result from the oil filling of the remote seal capillaries. This results in a measuring range offset which has to be taken into account when you set the pressure transmitter.

An offset in the measuring range also occurs when combining a remote seal with a transmitter if the remote seal is not installed at the same height as the transmitter.

Pressure transmitter output

If the level, separation layer or density increase in closed vessels, the differential pressure and hence the output signal of the pressure transmitter also increase.

For an inverted relationship between the differential pressure and the output signal, the start-of-scale and full-scale values of the SITRANS P must be interchanged.

With open vessels, a rising pressure is usually assigned to an increasing level, separation layer or density.

Influence of ambient temperature

Temperature differences between the individual capillaries and between the individual remote seals should be avoided.

Temperature variations in the area of the measuring setup cause a change in volume of the filling liquid and hence measuring errors.

Notes
  • For the separation layer measurement, the separation layer has to be positioned between the two spigots. Also you must make sure that the level in the container is always above the top spigot.
  • When measuring density, make sure that the level of the medium remains constant. The level should be above the top spigot.
Possible combinations of pressure transmitters and remote seals

Type of installation

Pressure transmitters

Remote seals

A/B

7MF4010
7MF4033
7MF4034
7MF4035
7MF8023
7MF8024

7MF4900
7MF4910
7MF4920

C1 and C2

7MF4233
7MF4234
7MF4235

7MF4900
7MF4910
7MF4920

(vacuum-proof design in each case)

 

7MF4333
7MF4334
7MF4335

7MF4901
7MF4921

D

7MF4433
7MF4434
7MF4435

7MF4903
7MF4923

E

7MF4433
7MF4434
7MF4435

7MF4913

G, H and J

7MF4433
7MF4434
7MF4435

7MF4903
7MF4923



































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Арматура DENDOR

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Датчики и измерители

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Регуляторы и регистраторы

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Пневматическое оборудование

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Краны и Клапаны

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Измерительные приборы

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Системы беспроводного управления «умный дом»

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Бесконтактные выключатели Конечные выключатели Оптические датчики Энкодеры

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SKW-FS - Установка умягчения

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Каталог оборудования 2014
Каталог продуктов Siemens Industry Приводная техника Техника автоматизации Системы автоматизации Системы визуализации SIMATIC HMI Системы идентификации Промышленные коммуникации SIMATIC NET Промышленные аппараты управления SIRIUS Промышленные информационные технологии Управление на базе РС Системы управления процессом Датчики Контрольно-измерительные приборы Измерительные преобразователи для давления Transmitter for rel. pressure, abs. pressure, diff. pressure, flow and level SITRANS P remote seals (HID: print) Remote seals of sandwich design Remote seals of flange design Diaphragm seal, screwed gland, direct mounting and/or with capillary Quick-release remote seals Miniature diaphragm seals Flushing rings Remote seals of flange design Quick-release remote seals Measuring setups Measuring setups with remote seals Measuring setups without remote seals Fittings Датчики давления Приборы измерения температуры SITRANS T Расходомеры Уровнемеры Расходомеры и счетчики Позиционеры Устройство для защиты и пуска двигателей SIMOCODE-DP Сигнализаторы сбоев в промышленном процессе Дополнительные компоненты Коммуникации и программное обеспечение Аппаратные ПИД-регуляторы SIPART Встраиваемые самописцы и индикаторы Анализаторы процесса Технологии взвешивания Блоки питания Продукты для специальных требований Автоматизация и безопасность зданий Низковольтная коммутационная техника Технология безопасности Системные решения и продукты для отраслей Сервис ... и все, что Вам еще необходимо

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