Emerson Micro Motion 7829 Viscomaster Dynamic Manuel d'exploitation
Product Data Sheet
PS-001199, Rev. C
April 2013
Micro Motion®7829 Viscomaster Dynamic™
Viscosity Meter
Micro Motion®viscosity meters are built to tackle the most demanding
process and marine applications. Rugged and reliable direct insertion meters
with very low maintenance, they provide fully integrated “fit and forget”
viscosity measurement.
High accuracy viscosity measurement
• Multi-variable measurement of dynamic viscosity, kinematic viscosity,
and temperature
• Unique direct insertion design
• Integral-mount transmitter with analog and digital communications
Greatest installation flexibility
• Continuous, real-time measurement in various installation
configurations
• Retrofit kits available for easy replacement of existing viscosity meter
technologies
Superior reliability and safety
• Worldwide marine-approved design for aggressive environments
• Insensitive to vibration, temperature, and pressure variations
2Micro Motion 7829 Viscomaster Dynamic Viscosity Meter
Micro Motion®7829 Series Viscomaster Dynamic™Viscosity Meter
About the 7829 Viscomaster Dynamic
The Micro Motion®7829 Viscomaster Dynamic™is a
proven technology for the accurate, continuous real-
time measurement and control of liquid viscosity.
The 7829 Viscomaster Dynamic viscosity meter has
been designed for installation in fuel oil applications
that supply engines, turbines, and burners in on-
shore and off-shore applications.
As part of its unique and rugged design, the 7829
Viscomaster Dynamic viscosity meter directly
measures dynamic viscosity and temperature. The
meter is also programmable to output calculated
density and kinematic viscosity measurements. The
Viscomaster Dynamic can easily cope with a range
of fuels from heavy fuel oil (HFO) to marine gas oil
(MGO).
The Viscomaster Dynamic has worldwide marine-
industry approvals including Lloyds Register, GL,
DNV, ABS, and BV. For a complete list of marine
approvals, see “Marine approval classifications” on
page 7.
Advantages
• Fully integrated “fit and forget” digital viscosity
and temperature measurement for monitoring
and control
• Two 4–20 mA outputs of kinematic viscosity and
temperature
• Modbus/RS-485 communications output of all
parameters, including calculated density and
calculated kinematic viscosity at operating
temperature
• Continuous measurement
• No moving parts means virtually no
maintenance
• PFA-coated tines for asphaltene rich fuels
• Integral Class B PT100 temperature sensor
• Hazardous-area approved (ATEX and CSA)
• 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. . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Hazardous area classifications . . . . . . . . . . . . . . . 7
Marine approval classifications . . . . . . . . . . . . . . . 7
General classifications . . . . . . . . . . . . . . . . . . . . . 7
Materials of construction . . . . . . . . . . . . . . . . . . . . 8
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Ordering Information . . . . . . . . . . . . . . . . . . . . . . 11
Micro Motion 7829 Viscomaster Dynamic Viscosity Meter 3
Typical applications
• Heavy fuel oil (HFO) heater control to burners
and engines
• Lube oil viscosity control
Typical industries
•Marine
•Power
• Heavy fuel oil (HFO) blending and bunkering
Principle of operation
The 7829 Viscomaster Dynamic viscosity meter
uses vibrating fork technology to measure viscosity.
Viscosity is measured by detecting the bandwidth
around the fork’s natural vibration frequency.
The following figure illustrates how the 7829 meter
uses the frequencies at point A (the lower
–3 db point) and at point B (the upper –3 db point)
to digitally calculate bandwidth and quality factor.
Quality factor is then used to define fluid viscosity
using standard calibration techniques.
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 Viscomaster Dynamic Viscosity Meter
No Field Calibration Required
The 7829 Viscomaster Dynamic 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 Viscomaster Dynamic does not
require remote electronics for signal processing.
This meter simultaneously measures real-time
viscosity and temperature. The integrally mounted
electronics can be configured to output a number of
user-defined parameters.
RS-485/Modbus Communications Interface
All measurements are available digitally through the
built-in RS-485/Modbus communications interface –
including calculated density and calculated
kinematic viscosity at operating temperature – 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.
User-Configurable 4–20 mA Outputs
Two 4–20 mA outputs are available:
• mA output 1 is configurable to output
parameters such as dynamic or kinematic
viscosity.
• mA output 2 is set to output temperature, which
you can configure for zero and span.
Any of a range of 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 for the two
mA outputs.
Code
mA output 1 mA output 2
Viscosity (cSt) Temp (°C)
4 mA 20 mA 4 mA 20 mA
H0250150
J0500150
ZCustom
Features
The Viscomaster Dynamic offers features that are suited to specific applications and industry needs.
Process Requirement 7829 Viscomaster Dynamic
Dynamic viscosity 9
Kinematic viscosity 9
Temperature measurement 9
Integrated density output Calculated
Sensor type Fork
Mounting arrangement Bypass / Inline
Transmitter version 9
mA outputs Two 4–20 mA
(1 configurable / 1 fixed)
Measurable liquid types Heavy fuel oil
Principle markets Marine/Power
Micro Motion 7829 Viscomaster Dynamic Viscosity Meter 5
Low Maintenance Required
Because the 7829 Viscomaster Dynamic viscosity
meter has 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
and fuel oil applications.
ADView Software Tool Features
ADView is a PC-based configuration and
diagnostics tool that runs on a Microsoft®Windows®
platform, communicates with the 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
ProLink II Software Tool Features
The ProLink II software tool (v2.9 or later) can be
used with the meter. ProLink II runs on a Microsoft
Windows platform, communicates with the 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 Viscomaster Dynamic Viscosity Meter
Performance
Temperature specification
Integral temperature sensor
Pressure ratings
Viscosity Calibrated Range 0.5 to 50 cP
Viscosity Accuracy ±1% span (±0.2 cP up to 10 cP)
Viscosity Repeatability ±0.5% of reading
Process
Ambient
–40 °F to +392 °F (–40 °C to +200 °C)
–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
Maximum operating pressure(1)
(1) Actual maximum operating pressures are limited by the process connection rating.
3000 psi (207 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.
Micro Motion 7829 Viscomaster Dynamic Viscosity Meter 7
Hazardous area classifications
Marine approval 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
ATEX
ATEX-approved: Certification for use in Europe ATEX II2G Ex d IIC, T4
CSA C-US
CSA-approved: Certification for use in Canada and USA Class I, Division 1 Groups C & D, T4
Marine Approval Country
American Bureau of Shipping USA
Lloyds London United Kingdom
Germanische Lloyd Germany
Det Norske Veritas Norway
Bureau Veritas France
RINA Italy
Nippo Kaiji Kyokai Japan
Russian Maritime Register of Shipping Russia
South Korean Register of Shipping South Korea
8Micro Motion 7829 Viscomaster Dynamic Viscosity Meter
Materials of construction
Weight
Electrical
Wetted parts 316L Stainless steel
Tine finish PFA laminated(1)
(1) PFA is applied only to the tines for its anti-stick properties not for corrosion protection.
Electronics enclosure Sand cast low copper alloy
Polyurethane paint finish
Weight 7.5 lb (3.4 kg) typical
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 externally powered 4–20 mA
±0.1% of reading, ±0.05% of full scale at 68 °F (20 °C)
±0.05% of full scale, over range –40 °F to +185 °F
(–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 (20 mm adaptor available)
Micro Motion 7829 Viscomaster Dynamic Viscosity Meter 9
Dimensions
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)
10 Micro Motion 7829 Viscomaster Dynamic Viscosity Meter
Installation
A variety of installation accessories are available for both inline and slipstream/bypass installations.
Additionally, retrofit adapter kits are available for easy replacement of other viscosity measurement
technologies. For more information on these installation accessories, see the Micro Motion®7829
Viscomaster®Series Accessories product data sheet available at www.micromotion.com.
Fuel heater control example
Most marine and land-based engine/burner applications use a fuel booster module to precondition the
heavy fuel oil (HFO) prior to injection. These modules usually consist of a number of supply pumps fed by
either HFO or MDO, a flow meter, in-line filters to remove the impurities, and a holding/mixing tank.
Following the supply section, the fuel is usually sent to booster pumps that increase the flow rate up to a
maximum of 20 m3/hr and then through a series of heat exchangers (liquid or electric) to change the product
viscosity for efficient combustion.
Following is a graphic that shows the different installation options for the 7829 Viscomaster Dynamic in a fuel
booster module.
Viscosity input
Viscosity output
Viscosity output
Viscosity
output
Inline viscosity meter replacement
(VAF Viscosense retrofit)
Capillary viscosity meter
replacement (VAF Viscotherm or
Nakakita retrofit)
Micro Motion flow-through-chamber
installation
Alarms
Relays
Fuel oil heat exchanger
Fuel oil
Control valve
Heating fluid
To engine
Ce manuel convient aux modèles suivants
1
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