1. Department of Textile Engineering
Assignments Topics: HVI (High Volume Instrument)
Submitted To: Submitted By:
S M Masum Alam Name: Faisal Ahmed
Lecturer, SEU ID: 2016000400074
Department of Textile Engineering Batch: 31st
Date of Submission: 24-12-17
CourseTitle: Textile Testing & Quality Control-1
HVI means High Volume Instrument. The testingof fibers wasalwaysof importance tothe spinner. It
isdone by the HVI machine. Highvolume instrumentsystemsare basedonthe fiberbundle strength
testing, i.e., many fibersare checked atthe same time and theiraverage values determined.Traditional
testingusingmicronire, pressley, stelometre, andfibrographare designed todetermine averagevalue
for a large numberof fibers, the socalledfiberbundletests. InHVI, the bundle testingmethodis
automated. Here, the time fortestingislessandsothe numberof samples thatcouldbe processed is
increased, quite considerably. The influenceof operatorisreduced.
The HVI testingisattractive due tothe classingof cottonand the layingdownof a mix inthe spinning
mill. ThisHVItestingissuitable forthe extensivequality control of all the balesprocessed inaspinning
mill. The mill isina position todetermine itsownquality level withinacertainoperatingrange. The time
for testingpersample is0.3 minutes. Itisbestappliedtoinstitutingoptimumcondition forraw material.
About180 samples perhourcan be testedandthat too withonly 2 operators.
The result are practically independent of the operator
The result are based on large volume samples, and are therefore more significant
The respective fibre data are immediately available.
The data are clearly arranged in summarized reports.
They make possible the utilization of raw material data.
Problems as a result of fibre material can be predicted and corrective measure instituted
before such as problems can occur.
Principle of HVI:
High volume instrument systems are based on the fiber bundle testing, i.e., many fibers are
checked at the same time and their average values determined. Traditional testing using
micronaire, pressley, stelometre, and fibro graph are designed to determine average value for a
large number of fibers, the so called fiber bundle tests. In HVI, the bundle testing method is
3. Historical Development of HVI:
Conventionally measurementof the fiberproperties wasmainly carriedoutusingmanual methodand it
included the maximum chance of getting errors involved in it due to manual errors and was also a time
consuming job. Thus there was a need for development of an instrument capable of
PCCA (plans cotton cooperative association) played a key role in the development of High Volume
Instrument(HVI) testingtodetermine the fiberproperties of cottonwhichrevolutionized the cottonand
textile industries. Asitsname implies, HVI determines the fiberproperties of abale of cottonmore quickly
and more accurately than the previous methodof evaluatingsome of those properties byhand classing.
The HVI system provides more information about a bale of cotton.
In 1960, PCCA and Motion Control, Inc., an instrument manufacturer in Dallas, Texas, began pioneering
the development of a system to eliminate the potential for human error that existed withhand classing
and expand the numberof fiberproperties thatcouldrapidly be determined foreachbale of cotton. The
goal was to be able to provide seven fiber quality characteristics for every bale produced by PCCA’s
farmer-owners. Laboratory instruments were available fordeterminingmostof the fiberproperties,but
they required upto15minutes orlongertodetermine eachof the properties. The PCCA theory wasbased
oneconomics:the fastercottoncouldbe classed,the fasteritcouldbe marketed;and, the more accurate
measurements of quality couldresultina more adequate supply of cottonwith fiberproperties tomeet
the specific needs of textile mills.
Bythe mid-1960s, the UnitedStatesDepartmentof Agricultural (USDA) andtheCottonProducersInstitute
(now called Cotton, Incorporated) also became involved in the research required to bring.
In 1968 three of the first five HVI lineswere in operation in Lubbock, Texas. One line was at Texas Tech
University’s International Textile Center and two at PCCA. These lines were the very earliest versions to
have all seven-fiber properties combined into a single testing line and measure them.
In 1980, USDA builta new classingoffice inLamesa, Texas, (about60 milessouthof Lubbock) specifically
designed only for instrument testing all of the cotton samples received at that office using the latest
versionof the HVI equipment. Thiswas a daring stepbut was based on data collected and analyzed and
improvements made inthe HVIsystemduringthe previous 20years. Although metwithskepticisminthe
initial yearsby many inthe cotton and textile industries, the HVI systemprevailed, andUSDA continued
to install the instrument testing lines in all government cotton classing offices. In 1991, USDA used the
HVI system on all the cotton provided to the department for classing. Today, HVI class data is accepted
throughout the world and is the foundation on which cotton is traded
4. Manufacturers of HVI:
In total, there are five companies manufacturing rapid instrument testing machines in the
1. Uster Technologies, Inc.,
2. Premier Evolvics Pvt. Ltd.,
3. Lintronics (China, Mainland)
4. Changing Technologies (China, Mainland)
5. Statex Engineering (India).
High volume instrument (HVI) is the most common rapid instrument testing machine made by
Uster Technologies, Inc. The only other company that has over 100 machines installed in the
world, mostly in Asia, is Premier Evolvics Pvt. Ltd. based in India. It is estimated that close to
2,000 rapid instruments testing machines have already been stalled in the world, mostly from
Uster Technologies, Inc. Not only do the machines from each company differ, but various
models from each company also differ among themselves. The full fledge models of both the
manufacturers are capable of measuring measure micronaire, length, length uniformity,
strength, colour, trash, maturity, sugar content etc.
High Volume Instrument
The HIROSHIMA Stelometer is used to check for the possible adverse effects of
certain fibre preparation methods and to ensure that the dyeing process does not
harm the fibres. Fibre strength & elongation determine the “toughness” of a fibre:
Only a strong fiber can produce a strong yarn, and fiber that elongates under tension
Imparts a stretching quality to the finished fabric. So a measure of these two fibre
Characteristics is important to the yarn spinning industry. Since fibre strength &
elongation helps to determine
Range : 2 to 7 Kg (force-breaking strength), 0 to 50% (elongation)
Loading Rate : 1 Kg. force/sec
Type : Table Top
Size : 350 mm W x 400 mm H x 150 mm D
Weight: 15 Kgs approx.
The evenness of yarn is an important index of quality control of textiles,
so the researches about the yarn evenness test method have been the hotspot in the
textile measurement for recent years.
6. Principle of Uster Evenness Tester:
Raw material as well as spinning problem can be detected by the
measurement of yarn unevenness which is done by Uster evenness tester or uster
The quality parameter is determined by a capacitive sensor. In this case the yarn,
roving or sliver is passed through the electric field of a measuring capacitor. Mass
variation of the material causes the disturbance of the electric field which are
converted into electric signal. Which is proportional to the mas variation of the
material. The unevenness is recorded as a diagram.
Advantage of Uster Evenness Tester:
The CV% measured by Uster give a measure of variation of weight per unit
This instrument measure the irregularity of material at high speed (2-
It can show both % of M.D & C.V. of material.
The recorder of pen can work at a high speed of 100yds/min
Disadvantages of Uster Evenness Tester:
The result obtained by this M/C is affected by moisture content of material.
This M/C cannot detect the thick and thin place.
In this instrument material up to a certain thickness can be tested.
Uses of Uster Evenness Tester:
Evenness measurement of yarn, roving and sliver.
Measurement of imperfection ( thick,thin place, eps)
Spectogram analysis/frequency analysis.
Yarn hairiness measurement
7. Uster HVI 1000
HVI 1000 is a high volume instrument which is produced by world
famous USTER company. It is commonly known as USTER HVI 1000. The USTER®
HVI 1000 measures the most important cotton fiber properties for cotton classing
purposes (and high-throughput requirements for spinning mills). USTER® HVI 1000
is the global reference tool for cotton classification, producing accurate and reliable
results. USTER® HVI 1000 is founded on more than 60 years of fiber testing
expertise and over 30 years of cotton classing experience worldwide.
Features of HVI 1000:
1. It measures all the important quality parameters currently used by textile industries
such as Micronaire, fiber length, length uniformity, strength, color, and trash.
2. Additional information on short fibers, cotton maturity and sample moisture content
are also evaluated.
3.700 samples can be tested per 8-hour shift
Function of HVI 1000:
A lot of works are determined by HVI 1000. These are point out below:
3. Short fiber index,
4. Micronaire Value,
5. Maturity index,
8. Color and trash, and
9. Moisture content.
Components of HVI 1000:
2. Barcode Reader
6. Printer and
7. Printer table
Uster HVI 1000
Application of USTERHVI 1000:
100% cotton samples in the form of bale or opened and cleaned material (card mat).
2. Maturity Index
3. UHML – Upper Half Mean Length
4. UI – Uniformity Index
5. SFI – Short Fiber Index
6. Fiber Strength in g/Tex
8. Moisture Content
9. Color (Reflectance Rd, Yellowness +b) & Color Grade (USDA Upland, Pima,
or regional customized color chart)
10. Trash (% Area, Trash Count) & Trash Grade (USDA)
9. 11. SCI (Spinning Consistency Index)
ART 2-high volume fiber tester premier
Fully automatic High volume fibre tester with speeds upto 140 tests per hour with
Modules to measure Length, Strength, Micronaire, Colour and Optical or Gravimetric
Trash measurement as additional option. Modular configuration with facility to have
an additional Length and Strength module
Automatic Micronaire measurement, weighment, disposal and precise engineering
Automatic Moisture measurement ensures accurate strength values without the
impact of environmental conditions
Bale SMART: A user friendly software which simplifies the Bale Management process
rue Maturity: A unique method of measurement which is traceable to image analysis
Application of HVI
HVI Used in Bale Management System:
This is based on the categorising of cotton bales according to their fibre
quality characteristics. It includes the measurement of the fiber characteristics with
reference to each individual bale, separation of bales into classes and lying down of
10. balanced bale mixes based on these classes. The reason for undertaking this work
lies in the fact that there is sometimes a considerable variation in the fibre
characteristics from one bale to another, even within the same delivery. This
variation will result in the yarn quality variation if the bales are mixed in an
Strength and Elongation
HVI uses the “Constant rate of elongation” principle while testing the
fibre sample. The available conventional methods of strength measurement are slow
and are not compatible to be used with the HVI. The main hindering factor is the
measurement of weight of the test specimen, which is necessary to estimate the
tenacity of the sample.
Fibre fineness is normally expressed as a micronaire value (microgram
per inch). It is measured by relating airflow resistance to the specific surface of fibres
and maturity ration is calculated using a sophisticated algorithm based on several
Moisture content of the cotton sample at the time of testing, using
conductive moisture probe and the main principle involved in the measurement is
based on the measurement of the dielectric constant of a material
Particle Count, % Surface Area Covered by Trash, Trash Code
.Measured optically by utilizing a digital camera, and converted to USDA trash
grades or customized regional trash standards
Maturity and Stickiness:
Calculated using a sophisticated algorithm based on several HVI™
Merits of HVI Testing:
1. The results are practically independent of the operator.
2. The results are based on large volume samples, and are therefore more significant.
3. The time for testing per sample is 0.3 minutes. The respective fibre data are immediately
4. About 180 samples per hour can be tested and that too with only 2 operators.
5. The data are clearly arranged in summarised reports.
6. They make possible the best utilisation of raw material data.
11. 7. It is best applied to instituting optimum condition for raw material.
8. Problems as a result of fibre material can be predicted, and corrective measures instituted
before such problems can occur.
9. The classing of cotton and the laying down of a mix in the spinning mill. This HVI testing is
suitable for the extensive quality control of all the bales processed in a spinning mill.
10. The mill is in a position to determine its own quality level within a certain operating range.
Standardized Process for HVI Testing:
The above discussion gives an idea about main latest fibre testing
techniques using HVI , this concludes that one can achieve higher accuracy with
least time in this system. Fibre testing is an important part in the final product, so it is
clear one can achieve great quality with accurate testing techniques, which were discussed in
this paper. Apart from this, various methods are also included which will
give proper results in fibre testing.