Endress+Hauser FMD630 Smart Diaphragm Differential Pressure Transmitter / đo áp suất

Endress+Hauser FMD630 Smart Diaphragm Differential Pressure Transmitter / đo áp suất

Application

The Deltabar S transmitter is used for the following differential pressure measurement tasks:
• Flowrate (volumetric or mass flow) in connection with primary devices in gases, vapours and liquids
• Level, volume or mass flow measurement in liquids
• Differential pressure monitoring of filters and pumps

Features and Benefits
• High accuracy
− Linearity better than 0.1 % of set span
− With “platinum” version, linearity better than 0.05 % of set span
− Long-term drift better than 0.1 % per year or 0.25 % per 5 years
• Process temperatures up to 120 °C as standard
• Universal modularity for differential pressure and process pressure (Deltabar S – Cerabar S), e.g.
− Replaceable display
− Sensor modules
− Universal electronics for process pressure and differential pressure
• Simple and easy operation via 4…20 mA, HART protocol or connection to PROFIBUS-PA or Foundation Fieldbus
• Zero and span freely adjustable with or without referential pressure
• Self-monitoring from sensor to electronics
• Wide variety of software functions such as characteristic curves, diagnostic codes, totalizer etc.

Mã: 1347-10750 Danh mục:

Applications

Diaphragm seal systems should be used if the process media and the device should be separated.

Diaphragm seal systems offer clear advantages in the following instances:
• In the case of high process temperatures
• In the case of process media that crystallise
• In the case of corrosive or highly various process media or process media with solids content
• In the case of heterogeneous and fibrous process media
• If good and rapid measuring point cleaning is necessary
• The measuring point is exposed to vibration (e.g. better view of display).

Design and Operation Mode

Diaphragm seals are separating equipment between the measuring system and the process medium.

A diaphragm seal system consists of:
• A diaphragm seal in a one-sided system, e.g. FMD 630 or two diaphragm seals, in a two-sided system, e.g. FMD 633
• Capillary tube
• Fill fluid and
• A differential pressure transmitter.

The process pressure acts via the diaphragm seal membrane on the liquid-filled system, which transfers the process pressure via the capillary tube onto the sensor of the differential pressure transmitter.

Endress+Hauser delivers all diaphragm seal systems as welded versions. The system is hermetically sealed, which ensures the highest reliability.