Aplisens Smart Differential Pressure Transmitter

General

The differential pressure transmitter is applicable to the measurement of pressure differences of: gases, vapours and liquids in cases where it is necessary to use seals and the pressure pulse source points may be several metres apart.

Typical applications include the hydrostatic measurement of: levels in closed tanks, densities and phase boundaries, and the measurement of a filter loss, pressure differences between media in pasteurisers etc. The available range of the diaphragm seals allows measurement at great majority of media. The active element is a piezoresistant silicon sensor separated from the medium by a distance sealing system.

The special design of the measuring unit means that it can withstand pressure surges and overloads of up to 40 bar. The electronic circuits are enclosed in a casing with a degree of protection IP 65 or IP66.

Description

The version of the transmitter with two remote diaphragm seals is recommended for the measurement of pressure differences when the hydrostatic pressure of the manometric fluid in the capillaries (which depends on the vertical spacing of the seals) is significantly less than the measuring range of the transmitter.

The best metrological results are obtained when the applied capillaries are identical, as short as possible, and terminated with identical seals. At such a configuration additional temperature errors, related to the remote sealing, affect both of the measurement chambers of the differential pressure transmitter in the same way, and thus cancel each other out

Feature

SMART DIFFERENTIAL PRESSURE TRANSMITTER WITH TWO DIAPHRAGM SEALS MODEL APR-2200ALW or APRE-2200

• 4…20 mA output signal + HART protocol
• Accuracy 0,1%
• Intrinsic safety certificate (ATEX, IECEx)
• Explosion proof certificate (ATEX, IECEx)
• Fully welded sensor guarantees tightness of oil system for many years
• Ability to configure measuring range locally

Application and construction

The differential pressure transmitter is applicable to the measurement of pressure differences of: gases, vapours and liquids in cases where it is necessary to use seals and the pressure pulse source points may be several metres apart. Typical applications include the hydrostatic measurement of: levels in closed tanks, densities and phase boundaries, and the measurement of a filter loss, pressure differences between media in pasteurisers etc.

The available range of the diaphragm seals allows measurement at great majority of media. The active element is a piezoresistant silicon sensor separated from the medium by a distance sealing system. The special design of the measuring unit means that it can withstand pressure surges and overloads of up to 40 bar. The electronic circuits are enclosed in a casing with a degree of protection IP 65 or IP66.

Configuration

The settings of the following metrological parameters can be changed :

• the units of pressure in which the range is configured, ¨
• start and end points of the range, time constant,
• inverted characteristic (output signal 20 ÷ 4 mA).

Communication

• The transmitter is configured and calibrated using a KAP-03 communicator, some other communicators (HART) or a PC using an HART/USB converter and Aplisens RAPORT 2 configuration software.
• The data interchange with the transmitter enables the users the transmitter identification, as well as reading of the currently measured differential pressure value, output current and percent of range width.

Product Model

APR-2000 ALW Smart Differential Pressure Transmitter

• 4…20 mA output signal + HART 5 / HART 7 protocol (special version: 0…20 mA or 0…5 mA output signal + HART 5 protocol)
  
•  Display with backlight
  
•  Safety version SIL2/SIL3
  
•  Intrinsic safety certificate ATEX, IECEx, FM, CSA(FM)
  
•  Explosion proof certificate ATEX, IECEx, FM, CSA(FM)
  
•  Programmable zero range, shift, characteristic and damping ratio with local panel keys
  
•  Static pressure limit up to 700bar
  
•  Accuracy 0,075% (0,05%, 0,04% on request)
  
•  Marine certificate – DNV, BV
  
•  Gold plated diaphragms
  
•  Wetted parts material 316L/Hastelloy C276

APRE-2000 Smart differential pressure transmitter

•  4…20 mA output signal + HART protocol
  
•  ATEX Intrinsic safety
  
•  Static pressure limit up to 320 bar
  
•  Accuracy 0.1%
  
•  Wetted parts material 316L

The APRE-2000 transmitter is applicable to the measurement of differential pressure of gases, vapors and liquids. The active element is a piezo resistant silicon sensor separated from the medium by separating diaphragms and a specially selected type of manometric fluid. The special design of the active sensing element ensures that it is able to withstand pressure surges and overloads of up to 250 or 320 bar. Electronics in the casing witha degree of protection IP65, IP66.

PRE-28 SMART Smart differential pressure transmitter

•  4…20 mA output signal + HART protocol
  
•  Intrinsic safety certificate (ATEX, IECEx)
  
•  Static pressure limit up to 420 bar
  
•  Accuracy 0,1%
  
•  Wetted parts material Hastelloy C276
  
•  Marine certificate DNV, BV

The subject of manual are smart pressure transmitters PCE-28.SMART, smart differential pressure transmitters PRE-28.SMART hereinafter referred jointly to as the transmitters. The manual applies to the following versions: standard, intrinsically safe Exi.

Data on the PCE-28, PRE-28 transmitters and PCE-28P probes in intrinsically safe version according to IECEx and ATEX are included in the appendices marked in Explosion-proof Device User Manual EN.IX.PCE.PRE.28.SMART.

PRE-28.MODBUS Differential pressure transmitter

•  Digital communication protocol Modbus RTU
  
•  Intrinsic safety and explosion proof certificates (ATEX, IECEx)
  
•  Accuracy 0.1%
  
•  Static pressure limit up to 413 bar
  
•  Marine certificate DNV, BV

PRE-28 Differential pressure transmmitter

•  Overloads up to 420 bar total static pressure
  
•  Accuracy 0,25%
  
•  Any range from 0…16 mbar up to 0…25 bar
  
•  Intrinsic safety certificate (ATEX, IECEx)
  
•  Marine certificate – DNV, BV

AS-dP Differential pressure transmitter

•  Accuracy 0.4%
  
•  Measuring ranges: 0 ÷ 1, 0 ÷ 2.5, 0 ÷ 4 bar; 0 ÷ 6, 0 ÷ 10 bar; 0 ÷ 16, 0 ÷ 25 bar
  
•  Output signal 4 ÷ 20 mA or 0 ÷ 10 V
  
•  Process connection: M20x1,5, 1/4”NPTF

The AS-dP differential pressure transmitters are used for level measurement in closed tanks, as well as for differential pressure measurement on back pressure elements such as filters, orifices and wherever the static pressure is not high. Typical applications include: heat exchanger stations, district heating networks. The transmitters meet the requirements of EU directives in accordance with the Declaration of Conformity.

Smart differential pressure transmitters with direct diaphragm seals

Smart or analog differential pressure transmitters with diaphragm seals for level measurement to pressure tank with gas-filled negative pressure line are recommended transmitters with diaphragm seal mounted on “+” side to pressure tank with liquid-filled negative line are recommended transmitters with diaphragm seal mounted on “-” side and converted output signal.

Smart differential pressure transmitter with two diaphragm seals model APR-2200ALW or APRE-2200

•  4…20 mA output signal + HART 5 / HART 7 protocol
  
•  Accuracy 0,1%
  
•  Safety version SIL2/SIL3
  
•  Intrinsic safety certificate ATEX, IECEx, FM, CSA (FM)
  
•  Explosion proof certificate ATEX, IECEx, FM, CSA (FM)
  
•  Fully welded sensor guarantees tightness of oil system for many years
  
•  Ability to configure measuring range locally

APM-2 Smart electronic differential Pressure Transmitter

 Measurement of differential pressure based on two absolute pressure transmitters  Modular construction with the possibility of replacing of each module of the measuring system  Output signal 4 ÷ 20 mA + HART
 Accuracy 0,1%

Modular electronic differential pressure transmitter APM-2 applies to the hydrostatic measure of level in closed
tanks, density or phase boundary. The measuring system consists of 3 separate modules – central unit and two absolute pressure transmitters. The level is calculated in a central unit basing on measurements from two pressure transmitters. High pressure transmitter measures the hydrostatic pressure of the liquid in the tank, low-pressure transmitter measures the pressure of gases above the liquid.

Differential pressure is calculated in the central unit. With default settings of the central unit function of high pressure transmitter is designed for the transmitter directly connected with central unit (PC1). User can change this assignment to second transmitter by changing the configuration in central unit in local menu or via HART protocol. Measuring points can be several dozen meters apart.

The casing of central units is made of aluminium alloy cast or stainless steel with degree of protection IP66 or
IP67 equipped with local display and buttons for configuration. Measuring element of each of absolute pressure
transmitters is piezor esistant silicon sensor separated from the medium by diaphragm and manometric liquid.

Process connection of absolute pressure transmitters can be diaphragm seal or threaded flush connection. By using
diaphragm seals transmitters can be used for measurement of contaminated medium, medium with high viscosity, very hot or very cold medium or medium where sanitary process connection is needed. Electronic units of pressure transmitters are closed in sealed stainless steel casings with degree of protection IP67. All modules of measuring system are connected wit

Technical Data

CAUTION: The maximum vertical diaphragm seal spacing shown in the table applies to level measurement, ensuring that it is possible to set the zero point of the transmitter when the tank is empty. For measurements of density or phase boundaries (in the sugar, chemical or refinery industries) the vertical spacing of the diaphragm seals can be larger.

Download Datasheet: Smart differential pressure transmitter with APRE-2200ALW or APRE-2200

Reference: aplisens.com

Other Article:

• Aplisens Smart level probe for pressure tanks APR-2000YALW
• Aplisens Smart Level Transmitter APC-2000ALW/L
• Tracer 1000™ LTT1-2G 2nd (up to 80ft), Flocorp-Generation Radar Level Transmitter
• Tracer 1000™ LTT1 (up to 65ft), Flocorp-Guided Wave Radar Level Transmitter
• Magnetrol Eclipse® 706 Guided Wave Radar Transmitter