Solartron 7826 insertion density transmitterthe complete density solution

DescriptionThe 7826 insertion densitometer is a sensor for continuous real time measurement of fluid density in pipelines, open or closed tanks.

The 7826 is designed to operate in one of two configurations - either as a sensor giving a frequency output to a signal converter (such as the Solartron 795X), or as a transmitter with 2 integral analog outputs and Modbus RS485 communications. It can be used in process control where density is the primary control parameter for the end product, or as an indicator of some other quality control parameter such as % solids or % concentration.

Advantages of the 7826n Fully integrated fit and forget digital density measurement for monitoring and controln Direct analog (4-20mA) output of density, base density, or special calculation (% solids, API, Specific Gravity, etc.)n RS485/Modbus communicationsn Low maintenancen PC configuration tool for diagnostics and data logging

Typical industries include:n Oil and petrochemicaln Brewingn Foodn Pharmaceuticaln Minerals processing (clays, carbonates, silicates, etc.)

Applications include:n Interface detection in multi-product pipelinesn Mass flow when used in conjunction with a volumetric flow metern Sugar refining (Brix)n Wort gravityn Slurriesn Coatingsn Evaporator controln Product mixingn End point detection in batch reactionsn Solvent separation

Technical specification sheetIP7826September 2006 Density

Installation

The 7826 is factory calibrated and no further calibration is necessary. The calibration is traceable to UK National Standards through Mobrey Measurement's own UKAS approved laboratory.

The 7826 operates with fluid viscosities of up to 500cP, making is suitable to measure wide range of liquids.

It measures line density and temperature, and calculates

base density using API tables or a matrix referral as well as parameters such as API, Brix, % solids, % mass, % volume and Specific Gravity (there is even a user-defined quadratic equation calculation available).

The calculation is performed in conjunction with a signal converter (for the frequency output version) or inside the transmitter version electronics. Any of these parameters can be used to drive integral analog

(4-20mA) outputs, (in either the signal converter or the transmitter) enabling it to be used as the process variable in control applications, without the need for additional processing electronics.

The design of the 7826 ensures accurate and reliable results. Maintenance is minimal, leading to lower overall operating costs.

Features

Principle of operation

All Mobrey Measurement liquid density transducers operate on the same general principle and can be likened to that of a mass spring system. When a mass on a spring is displaced and released it will oscillate at a

natural frequency until it comes to a rest due to viscous damping. When a driving force is applied to the mass to overcome the effect of damping, the vibration is maintained in resonance.As the measured product density

Mobrey Measurement can provide a variety of installation accessories, such as weldolets, for direct pipeline insertion, or flow-through chambers, which provide the optimum environment for the 7826.

Ask for brochure IP7004 for more details.

changes, it in turn changes the vibrating mass of the density transducer, which is then detected by a change in the resonant frequency.

Flange connection details Cone seat connection details

Technical specification sheetIP7826September 2006 Density

795x Signal converter featuresInputs from 7826 long stem:n Line density (frequency)n Temperature (PT100)

Typical 795x Calculations:n Line densityn Referred densityn Specific gravityn % concentration

n Specific Gravity

795x Outputs:n Status n RS 232C/485n Analog

Ask for brochure B1251 for more details

Part number identification

Technical specification sheetIP7826

September 2006Density

E Hastelloy C22, standard finish D Hastelloy C22, electro-polishedG Hastelloy C22, PTFE laminated tinesH Monel 400, standard finishJ Monel 400, electro-polished tinesL Monel 400, PTFE laminated tines

* Analog output #2 defualt setting : Temperature

Code Product 7826 7826 Insertion density transmitter Code Material A 316 Stainless steel, standard finish C 316 Stainless steel, electro-polished F 316 Stainless steel, PTFE laminated tines V 304 Stainless steel, standard finish T Titanium, standard finish U Hastelloy B2, standard finish Z Special: Use this letter code during quotation request Code Amplifier system A Frequency output ATEX EEX d IIC T4

abcdefThe right is reserved to amend details given in this publication without notice

Mobrey Measurement 158 Edinburgh Avenue, Slough, Berks SL1 4UE UKTel: +44 (0)1753 756600 Fax: +44 (0)1753 823589e-mail: mobrey.sales@EmersonProcess.com www.mobrey.com

Mobrey Inc.19408 Park Row, Suite 320, Houston, TX 77084 USATel: 281 398 7890 Fax: 281 398 7891e-mail: mobrey.sales@EmersonProcess.com www.mobrey.com

Technical specification sheetIP7826

September 2006Density

The Emerson logo is a trade mark and service mark of Emerson Electric Co.Solartron is a registered trademark of Lloyd Instruments Limited, a subsidiary of Ametek, IncAll other marks are the property of their respective owners

ADView is a software package provided by Mobrey Measuement to enable you to:n Configure our density and viscosity transmitters.n View and save data from them.n Check that they are functioning correctly.ADView is installed on a PC and interacts with the 7826 insertion density transmitter through one of the PCs standard serial (RS-232) ports.ADView provides many useful facilities, such as:

Density operating range: 0 - 3g/cc (0 - 3000kg/m3) (0-187.4 lb/ft3)Calibrated range: 0.6 - 1.25g/cc (600-1250kg/m3) (38.5-80.25 lb/ft3)Accuracy: 0.001g/cc (1.0kg/m3) (0.06 lb/ft3)Repeatability: 0.0001g/cc (0.1kg/m3) (0.006 lb/ft3)Temperature range: Process** -50C to +200C (-60F to +392F) Ambient -40C to +85C (-40F to +185F)Pressure range 207bar (3000psi)(max working)Viscosity range: up to 500cPTemperature sensor (integral): PT100 BS1904 Class B, DIN 43760 Class BOutput signals Density - frequency, 2 wires (frequency version) (6V peak nominal) Temperature - 100 ohm PRT (4 wire)Transmitter version 2 x 4-20mA analog output: Isolated, not self-powered Controlled by: Any user-selected parameter Accuracy: 0.1% reading, 0.05%FS @20C (68F) Repeatability: 0.05%FS over range -40C to +85C(-40F to +185F)RS485 Interface: 9600baud, Modbus (Modicon) RTUElectrical connection Screw terminal, cable entry to suit 1/2" NPT gland (20mm adaptor available)Environment: IP66 Power Supply: 23 to 25Vdc, 42mA - frequency version 20 to 28Vdc, 35-45mA - transmitter versionWetted materials: Stainless SteelTine finish: Standard, PTFE coated or Electro-polishedConnections: ANSI 150 to 600RF; DIN 50 PN16, PN40 and PN100 Approvals: ATEX II 2G EEx d IIC T4 EMC EN61326

Specification

n Setting up serial link to communicate with the 7826 density transmitter.n Configuring the 7826 long stem density transmitter.n Displaying data in real time, or as a graph.n Logging data to a file.n Verifying correct operation of the system, and diagnosing faults.n Loading or storing Modbus register values.n Read/write to individual Modbus registers.

Diagnostic Tool

** NOTE: Where ATEX is required the process temperature is further limited to -40C to +150C / -40F to +302F.