Emerson Micro Motion 7829 Visconic Series Manual operacional

High performance

industrial HFO

viscosity meter

High performance

viscosity sensor

7829

Visconic

7827

Product Data Sheet

PS-001183, Rev. C

April2013

Micro Motion®7829 Visconic Viscosity Meter

Micro Motion®viscosity meters are built to tackle the most demanding

industrial and process applications. Rugged and reliable direct insertion

meters with very low maintenance, they provide fully integrated “fit and

forget” viscosity measurement.

High accuracy viscosity and density measurement

• Multi-variable measurement of viscosity, density and temperature

• Unique direct insertion design in lengths up to 13 ft (4 m)

• Integral-mount transmitter with analog and digital communications

Greatest installation flexibility

• Continuous, real-time measurement in pipelines, slipstream/bypass,

and tank installations

• Wide range of corrosion-resistant materials

Superior reliability and safety

• Optimized design – insensitive to vibration, temperature, and

pressure variations

High performance

viscosity meter

kits

7827 / 7829

High performance

marine and power

HFO viscosity

meter

7829

Viscomaster

2Micro Motion 7829 Visconic Viscosity Meter

Micro Motion®7829 Visconic Viscosity Meters

The 7829 Visconic viscosity meter is an accurate measurement instrument used for continuous real-time

process control of liquid viscosity.

About the 7829 Visconic

The Micro Motion®7829 Visconic viscosity meter is

used for measurement or control of on-line process

viscosity. The meter is used in applications where

viscosity or density is the primary control parameter

for the end product or is an indicator of some other

quality control parameter such as % solids or

% concentration.

As part of its unique and rugged design, the

7829 Visconic viscosity meter directly measures

both dynamic viscosity and density, allowing a true

measurement of kinematic viscosity, which is the

preferred parameter in many industries.

The 7829 Visconic viscosity meter has been

designed for industrial oil industry applications and

can serve all major hydrocarbon markets.

Advantages

• Fully integrated “fit and forget” digital viscosity

and density measurement for monitoring and

control

• Two direct 4–20 mA outputs of viscosity, base

viscosity, density, base density, or special

calculations (% solids, °API, specific gravity)

• Modbus/RS-485 communications

• Continuous measurement

• No moving parts means virtually no

maintenance

• Integral Class B PT100 temperature sensor

• Hazardous-area approved (ATEX and CSA)

• Long-stemmed version is suitable for use on

open and closed tanks and available in lengths

up to 13 ft (4 m)

• Insensitive to vibration

• Direct insertion meter suitable for high-line

pressure

• PC configuration tools for diagnostics and data

logging

Contents

Typical applications . . . . . . . . . . . . . . . . . . . . . . . . 3

Typical industries . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Principle of operation. . . . . . . . . . . . . . . . . . . . . . . 3

Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Temperature specification . . . . . . . . . . . . . . . . . . . 6

Pressure ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Hazardous area classifications . . . . . . . . . . . . . . . 7

General classifications . . . . . . . . . . . . . . . . . . . . . 7

Materials of construction . . . . . . . . . . . . . . . . . . . . 8

Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Ordering Information . . . . . . . . . . . . . . . . . . . . . . 13

Micro Motion 7829 Visconic Viscosity Meter 3

Typical applications

• Heavy fuel oil (HFO) heater control to burners

and engines

• Lube oil viscosity control

• Interface detection in multi-product pipelines

• Mass flow, when used in conjunction with a

volumetric flow meter

• Product mixing and blending

Typical industries

• Oil and petrochemical

•Refining

• Heavy Fuel Oil (HFO) blending and bunkering

Principle of operation

The 7829 Visconic viscosity meter uses a vibrating

fork technology to measure density and viscosity. As

the liquid density changes, it affects the vibrating

mass of the meter. The change in vibrating mass

then affects the resonant frequency. Viscosity is a

function of the bandwidth, which is an indication of

the damping associated with the liquid.

The following figure illustrates how the 7829 meter

uses the resonant frequencies at point A (the lower

–3 db point) and at point B (the upper –3 db point)

to digitally calculate the density, bandwidth and

quality factor. These measurements then give

digitally determined values of fluid density and

viscosity.

Product 1

Product 2

Response

amplitude

Frequency (Hz)

Product 1 – Low Viscosity

Product 2 – High Viscosity

Bandwidth = Point B – Point A

Resonant Frequency = (Point A + Point B) / 2

Quality Factor = Resonant Frequency / Bandwidth

4Micro Motion 7829 Visconic Viscosity Meter

No Field Calibration Required

The 7829 viscosity meter is factory-calibrated and

no field calibration is required. The calibration is

traceable to UK National Standards through the

Micro Motion onsite accredited laboratory.

Integral Electronics for Signal Processing

A configured microprocessor-based electronic

module provides the full signal conditioning,

calculation, and diagnostic facilities within these

meters. The 7829 meter does not require remote

electronics for signal processing. This meter

simultaneously measures real-time viscosity,

density, and temperature; and, the integrally

mounted electronics can be configured to output a

number of user-defined parameters.

User-Configurable 4–20 mA Outputs

Two 4–20 mA outputs are available and configurable

to output parameters such as dynamic and

kinematic viscosity, density, temperature and other

calculated measurements such as base viscosity,

°API, °Brix, % solids, % mass, % volume and

specific gravity.

Any of the output parameters can be used to drive

the two 4–20 mA outputs, enabling them to be used

as the process variable in control applications

without the need for additional processing

electronics.

Following are the default settings of the two

4–20 mA outputs.

RS-485/Modbus Communications Interface

All measurements are available digitally through the

built-in RS-485/Modbus communications interface,

for integration into plant data systems. You can use

the ADView or ProLink II (v2.9 or later) software

tools to configure or diagnose a meter via the

RS-485/Modbus interface. See “ADView Software

Tool Features” and “ProLink II Software Tool

Features” for more information.

Code

mA Output 1 mA Output 2

Viscosity (cSt) Temp (°C)

4 mA 20 mA 4 mA 20 mA

H 0 25 0 150

J 0 50 0 150

E 0 100 0 150

M 0 200 0 150

K 0 500 0 150

F 0 1000 0 150

G 0 12500 cP 0 150

ZCustom

Features

The 7829 Visconic offers features that are suited to specific applications and industry needs.

Process Requirement 7829 Visconic

Dynamic viscosity 9

Kinematic viscosity 9

Temperature measurement 9

Integrated density measurement 9

Referred kinematic viscosity 9

Referred density measurement 9

Sensor type Fork

Long-stem version available 9

Mounting arrangement Bypass / Tank / Inline

Transmitter version 9

mA outputs Two 4–20 mA (both configurable)

Measurable liquid types Refined products and crude oil

Principle markets Industrial

Micro Motion 7829 Visconic Viscosity Meter 5

Low Maintenance Required

Because the 7829 viscosity meters have no moving

parts, minimal maintenance is required, leading to

lower overall operating costs.

The vibrating forks are available with PFA coating to

assist self-cleaning. PFA is ideal for hydrocarbon

applications. Care should be taken if the PFA

coating is to be used in a corrosive application.

Please consult your local Micro Motion sales office.

ADView Software Tool Features

ADView is a PC-based configuration and

diagnostics tool that runs on a Microsoft®Windows®

platform, communicates with the 7829 meter

through a standard serial port, and provides the

following functionality:

• Setting up a serial link to communicate with the

7829 transmitter

• Configuring the 7829 transmitter

• Displaying data real-time or as a graph

• Logging data to a file

• Verifying correct operation of the system and

diagnosing faults

• Loading or storing Modbus register values

• Read/write to individual Modbus registers

ProLink II Software Tool Features

The ProLink II software tool (v2.9 or later) can be

used with the 7829 viscosity meter. ProLink II runs

on a Microsoft Windows platform, communicates

with the 7829 meter through a standard serial port

or USB port, and provides the following

functionality:

• Configuring the 7829 transmitter

• Viewing and logging process parameters

• Viewing meter diagnostics

6Micro Motion 7829 Visconic Viscosity Meter

Performance

Temperature specification

Integral temperature sensor

Viscosity Calibrated Range 0.5 to 100 cP

10 to 1000 cP

100 to 12500 cP (long-stem version only)

Viscosity Accuracy ±1% span (±0.2 cP up to 10 cP)

Viscosity Repeatability ±0.5% of reading

Density Calibrated Range 0.6 to 1.25 g/cc 38 to 78 lb/ft3

Density Accuracy ±0.001 g/cc ±0.0624 lb/ft3

Density Repeatability ±0.0001 g/cc ±0.0062 lb/ft3

Process Short-stem version

Long-stem version

–40 °F to +392 °F (–40 °C to +200 °C)

–40 °F to +302 °F (–40 °C to +150 °C)

Ambient –40 °F to +185 °F (–40 °C to +85 °C)

Technology 100 Ohms RTD (4 wire)

Accuracy PT100 BS1904 Class B, DIN 43760 Class B

Micro Motion 7829 Visconic Viscosity Meter 7

Pressure ratings

Hazardous area classifications

General classifications

Electromagnetic compatibility

All versions conform to the latest international standards for EMC, and are compliant with

EN 61326/IEC 61326.

Environment

• Weather rating: IP66

Maximum operating

pressure(1)

(1) Actual maximum operating pressures are limited by the process connection rating.

Short-stem version

Long-stem version

3000 psi (207 bar)

1450 psi (100 bar)

Test pressure Tested to 1.5 x the maximum operating pressure

PED compliance Outside the scope of European directive 97/23/EC on Pressure Equipment.

ATEX

ATEX-approved: Certification for use in Europe ATEX II2G Ex d IIC, T4

CSA

CSA-approved: Certification for use in Canada and USA Class I, Division 1 Groups C & D, T4

8Micro Motion 7829 Visconic Viscosity Meter

Materials of construction

Weight

Electrical

Wetted parts Short-stem version 304 and 316 Stainless steel

Alloy C22 and B3

Alloy 400

Long-stem version 304 and 316 Stainless steel

Electronics enclosure Short-stem version Sand cast low copper alloy

Polyurethane paint finish

Long-stem version Sand cast low copper alloy, or stainless steel

Polyurethane paint finish

Tine finish Standard, electro-polished, or PFA laminated(1) finishes available

(1) PFA is applied only to the tines for its anti-stick properties not for corrosion protection.

Weight Short-stem version

Long-stem version

14.8 lb (6.7 kg) typical

Dependent on stem length (contact factory)

Power supply requirement For transmitter

For mA outputs

20 to 28 VDC, 50 mA

22 mA per output

Outputs mA

Accuracy

Repeatability

Out-of-range

System Alarm

Two passive 4–20 mA

±0.1% of reading, ±0.05% of full scale at 20 °C

±0.05% of full scale, over range –40 °C to +85 °C

3.9 or 20.8 mA on 4–20 mA

2 or 22 mA on 4–20 mA (Programmable alarm state)

Communications RS-485 (Modbus)

Electrical connection Screw terminal, cable entry to suit ½" NPT gland (one 20 mm adaptor included)

Micro Motion 7829 Visconic Viscosity Meter 9

Dimensions

7829 Short Stem

Cone-seat connection details

Flange connection details

Dimensions in inches (mm)

4.9 (125.4)

5.5 (140)

∅4.3 (109)

Mounting to suit 1.5″Swagelok or

similar cone

1.2

(31)

1/2″NPT both sides

4.8 (121)

0.5

(12)

∅1.38 (35)

Dimensions in inches (mm)

4.9 (125.4)

5.5 (140)

∅4.3 (109)

1.2

(31)

1/2″NPT both sides

4.8 (121)

0.5

(12)

∅1.38 (35)

10 Micro Motion 7829 Visconic Viscosity Meter

7829 Long Stem

Open-tank connection (cast housing)

Open-tank connection (stainless steel housing)

∅4.29 (109)

5.75 (146)

5.71 (145)

4.53 (115)

Pipe must be securely

clamped in at least two

places along this length.

Electronic housing

External Earth

connector

Lower nodal mass

Long-stem 1.5″SCH 80 tube

(1.9″external diameter)

Vibrating element

Dimensions in inches (mm) Mounting hardware is customer specific, and is not supplied.

∅1.38 (35)

19.68 (500)

Stem lengths up to 13 ft (4 m) are available as an

ETO purchase.

∅4.75 (120)

6.89 (175)

5.71 (145)

5.04 (128)

Pipe must be securely

clamped in at least two

places along this length.

Amplifier housing

External Earth

screw

Lower nodal mass

Long-stem 1.5″SCH 80 tube

(1.9″external diameter)

Vibrating element

Dimensions in inches (mm) Mounting hardware is customer specific, and is not supplied.

Upper nodal mass

Cover lock screw

M4 x 5 ST.STL -

Kept captive by

data label

NPT

∅1.38 (35)

19.68 (500)

Stem lengths up to 13 ft (4 m) are available as an

ETO purchase.

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