Emerson Micro Motion 7829 Visconic Series Operational manual

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.