Page

1 AVSPro II Viscosity Sampler 32Declaration of Conformity 33Technical data 34-35Warning and safety information 36

1.2 AVSPro II - Function and construction 37

2 Reliability by precision 382.1 Optoelectronic measurement method 382.2 Thermoresistive measurement method 38

3 Functional units 393.1 ViscoPump

for thermoresistive measurement 40for optoelectronic measurement 41Possible applications 42

3.2 Viscometers 433.3 Sample lift 443.4 Sample carrier 453.5 Sample transfer unit, linear operation and control 463.6 Casing and profile frame 473.7 Transparent thermostats 483.8 Back lighting 483.9 Flow-through cooler 483.10 Waste valves 493.11 Evacuation pump 503.12 Waste bottle 513.13 PC specifications 52

4 Working with the AVSPro II 53Power-up and settings 53Equipping the sample carrier 53

5 System expansion 545.1 Changing the ViscoPump 545.2 Replacing the Micro Ubbelohde Viscometer with TC sensors 555.3 Replacing optoelectronic viscometers 565.4 Replacing the dosing module 565.5 Replacing the needle 575.6 Docking station - installation and disassembly/Changing the O-ring 575.7 Maintenance of the driving spindle of the dosing unit 57

31

Table of contents

Tab

le o

f co

nte

nts

AV

SPro

II

Au

tom

atic

Vis

cosi

ty S

amp

ler

1

32

•The AVSPro II is an automaticviscosity sampler for determiningabsolute and relative viscosity.• It is operated using a Personal

Computer (PC). •The supplied software controls

the measurement operation automatically.

• Calculation and documentationof the determined values is done by means of the PC.

To determine viscosity, the flowtime between two meniscus pas-sages in a capillary viscometer ismeasured. Depending on thespecific requirements, this measu-rement can be performed in twodifferent manners: after the opto-electronic or the thermoresistivemethod.In this way it is possible to deter-mine samples of a viscosity from0.35 to 800 mm2/s (referred to25°C).

Owing to the widely self-explana-tory nature of the user surface ofthe PC software, the course of theindividual measurements is sim-ple. The screen of the connectedPC displays the respective opera-ting statuses. Arrows and iconsallow a speedy identification ofthe status displays (e.g. measure-ment position, condition of themeasurement program etc.), er-ror messages or operator prompts.

““AAbbssoolluuttee vviissccoossiittyy”” mmeeaassuurreemmeenntt mmooddee ffoorr tthhee ddeetteerrmmiinnaattiioonn ooff

• kinematic viscosity• Saybolt Universal seconds

(SUS)• Saybolt Furol seconds• dynamic viscosity• viscosity index

““RReellaattiivvee vviissccoossiittyy”” mmeeaassuurreemmeenntt mmooddee ffoorr tthhee ddeetteerrmmiinnaattiioonn ooff

• specific viscosity• reduced viscosity• inherent viscosity• K-value

AVSPro II Automatic Viscosity Sampler1.1

Technische Daten

Viskositätsprobenautomat

AVSPro II

23. Juni 2006

SI Analytics GmbHHattenbergstraße 10

D-55122 MainzDeutschland, Germany

KONFORMITÄTSERKLÄRUNGDECLARATION OF CONFORMITY

Wir erklären in alleinigerVerantwortung, daß dasProdukt

Viskositäts-probenautomat

AVSPro II

auf das sich diese Erklärungbezieht, übereinstimmt mitdem normativen Dokument

We declare under our sole re-sponsibility that the product

ViscosityAutomatic Sampler

AVSPro II

to which this declaration rela-tes is in conformity with thenormative document

23. Juni, June 23th, 2006AGQSF 0000-A051-02/090422

Technical data of the AVSPro II Automatic Viscosity Sampler

CE mark: EMC according to the directive 89/336/EWG of the EU Council;Interference emission according to the EN 50 081 standard, Part 1Jamming resistance according to the EN 50 082 standard, Part 2Low-voltage according to the Directive 73/23/EWG, as amended by the Directive 93/68/EWG of the EU Council

Country of origin: Germany

Sample accommodationSample carrier: Standard (unheated) and heatable up to 60°C (available as an option with the order)

a) for 16 pces.100 ml sample bottles with GL 45 DIN thread and threaded PP closing cap or100 ml sample bottles according to DIN 12 038 with NS 29 ground finish with matching PP closing capsb) for 56 pces.20 ml sample bottles with GL 18 DIN thread and threaded PP closing cap, Ø 16 x 100 mm

Dosing moduleCylinder: Borosilicate glass cylinder, DURAN®Measurement parameters:

Flow time in seconds [s]Temperature in degree centigrade [°C]output via RS-232-C interface by the immersion circulator

Measurement value recording:Flow time: Optoelectronic or thermoresistive recording of the meniscus

passage through the measurement stages of the viscometerTemperature: Pt 100 resistance thermometer for CT 1650 thermostat head

(immersion circulator) or Pt 1000 resistance thermostat for thermostat head (immersion circulator) CT 52

Measurement rangesViscosity: 0.35 ... 800 mm2/s at a sample temperature of approx. 20 ... 25°CTime: up to 9999.99 s, resolution 0.01 sSuction pressure: fully automatic control (from - 300 ... + 300 mbar)Measurement accuracy

Precision (repeatability and comparability) according to DIN 51 562, Part 1Time measurement: ± 0.01 s ± 1 digit, but not more accurate than 0.01 %

The measurement uncertainty with measurements of absolute kinematic viscosityin addition depends on the uncertainty of the numeric value for the viscometer constant and the measurement conditions, especially of the measurement temperature

Selection parameters To be set via the softwareMethod: Absolute or relative viscosityViscometer: Ubbelohde Viscometer according to DIN 51 562, Part 1; ISO 3105 (BS-IP.SL)

and ASTM D 446; ASTM D 2515; ISO 3105Micro Ubbelohde Viscometer according to DIN 51 562, Part 2Micro Ostwald ViscometerCannon-Fenske Routine Viscometer according to ISO 3105; ASTM D 2515; BS 188Micro Ubbelohde Viscometer with TC sensors following DIN 51 562, Part 2

Version June, 23 2006Page 1 of 2

Translation of the legally binding german version

Technical data of the AVSPro II Automatic Viscosity Sampler

Selection parameters (continued)ViscoPump: Pump parameters (ramp, pressure)Sample transfer: Sample-carrier position, viscometer positionSample identifier: alphanumeric in manual mode, or automatically by means of barcode reader

unit (option)Number of measurements: 1 … 10 for each sampleNumber of rinsing operations: 0 … 99 with following sample - Please note sample quantity! -

or with rinsing liquid from pre-selected positionTempering time: 0 ... 20 min, selectable in increments of 1 minData transfer parametersData interface: bi-directional serial interface according to EIA RS232-CData format: word length 7 bits, 2 stop bits, 4800 baud, no parityConnectionsViscometer: to be connected to the front panel of ViscoPump plug-in unitsPneumatic connectionsViscoPump: for viscometer: Round-plug connector with bayonet catch for AVS/S

(measurement tripod), 5-channel socket or for TC Viscometer, 4-channel socket*,

1 RS-232-C serial interface eachfor transparent thermostats andfor Daisy Chain - ViscoPumpPlug connections: 9-channel sockets: Subminiature D

SPS: to PC:serial RS-232-C interface; plug connection: 9-channel Subminiature D

Mains connection: Device plug with safety interrupter according to VDE 0625, IEC 320/C14, EN 60320/C14 DIN 49 457 B

Mains supply corresponds to Protection Class 1 according to DIN EN 61 010, Part 1, unsuited for use in hazardous environment!

Mains: manual switch-over option from 115 V/230 V ~, 50/60 HzPower consumption: 300 VA max. without transparent thermostat

MaterialsCasing: Stainless steel, aluminium and plastic components made of polyurethane hard

form (PUR) with chemically resistant two-component coatingCasing: Dimensions: approx. 1300 x 1200 x 610 mm (W x H x D)

Weight: approx. 100 kg, depending on equipment (excl. transparent thermostat)Ambient conditions: Ambient temperature: + 10 ... + 40°C for operation and storage

Humidity according to EN 61 010, Part 1:max. rel. hum. 80% for temperatures up to 31°C, linearly decreasing down to 50% rel. hum. at a temperature of 40°C

DURAN® registered trademark of SCHOTT GLAS, Mainz

* With the current configuration of the AVSPro II only Micro Ubbelohde Viscometers with TC sensors in combination with the CT 53 transparent thermostat can be used!

Version June, 23 2006Page 2 of 2

Translation of the legally binding german version

For reasons of safety the AVSPro IIAutomatic Viscosity Sampler mustonly be opened by authorizedpersonnel.This means, among other things,that work on the electric equip-ment must only be performed bytrained specialists. In the case ofunauthorized intervention in theAVSPro II Automatic ViscositySampler or negligent or delibera-te damaging the warranty willlapse.For safety reasons the AVSPro IIAutomatic Viscosity Sampler mustnot be used for any purposesother than those described in thepresent operating instructions. Itis not suitable for operation in ahazardous environment.

Please observe as well the opera-ting instructions of the viscome-ters and thermostats and those ofthe other equipment to beconnected.

The AVSPro II Automatic ViscositySampler corresponds to Pro-tection Class I.

It was built and tested accordingto DIN EN 61 010, Part 1,Protective Measures for ElectronicMeasurement Equipment, andhas left the manufacturing plantin perfect condition under safetyaspects. In order to maintain thiscondition and ensure safe opera-tion, the user has to observe theinformation and warning notescontained in the present opera-ting instructions.

� Prior to switching on it has tobe ensured that the opera-ting voltage set on the AVSPro II Automatic ViscositySampler matches that of the mains net.

� The mains plug must only beplugged to grounded sockets.The protective effect must not be cancelled by an extension cable without pro-tective conductor. Any dis-ruption of the protective con-ductor inside or outside the AVSPro II Automatic ViscositySampler, or any loosening ofthe protective conductor connection may render the AVSPro II Automatic ViscositySampler hazardous.Any intentional disruption is inadmissible.

� It has to be ensured that no fuses other than those of thespecified type and with the nominal current strength areused. The use of mended fuses or short-circuiting the fuse holder is inadmissible.

� If it has to be assumed that safe operation is no longer possible, the AVSPro II Automatic Viscosity Sampler has to be closed down and secured against inadvertent putting into operation.

� Please switch the AVSPro II Automatic Viscosity Sampler off, remove the mains cable, and contact the device department of SI Analytics.

� The built-in safety features, especially the needle protec-tion, must never be put out of operation.

� Prior to any service work on the AVSPro II Automatic Viscosity Sampler, the mains plug has to be pulled off the socket.

� To avoid hazards emanating from chemicals and/or sam-ples used, the statutory acci-dent-prevention regulations have to be adhered to (e.g. use of protective glasses, pro-tective clothing, protective breathing equipment).

� The AVSPro II Automatic Viscosity Sampler must not be operated or stored in rooms with a damp atmo-sphere.

� If the AVSPro II Automatic Viscosity Sampler shows visi-ble damage, one has to as-sume that safe operation is no longer possible.

War

nin

g a

nd

saf

ety

info

rmat

ion

36

Warning and safety information

AVSPro II - Function and construction1.2

The AVSPro II Automatic ViscositySampler determines viscosity bymeans of capillary viscometry.Viscometry is the most accuratemethod for determining the vis-cosity of liquids with Newtonianflow properties.

The measurement process as suchconsists in a high-precision recor-ding of the flow time. Themeasurements are used to deter-mine the time which a specificquantity of liquid requires to flowthrough a capillary of a definedwidth. Viscosity is calculated fromthe flow time, with the calculati-on methods depending on therespective application.

The AVSPro II Automatic ViscositySampler consists of the followingbasic elements/functional units:

• ViscoPump• Viscometers• Sample lift with sample

carriers• Sample transfer system• Transparent thermostats

• ViscoPump

The ViscoPump is the core ele-ment of the AVSPro II AutomaticViscosity Sampler. It controls theentire measurement process andcan be connected via a serialinterface (daisy chaining) tovarious peripherals, for instanceto a PC, transparent thermostator barcode reader unit (option).A maximum of 8 plug-in unitscan be used on the AVSPro II.Corresponding ViscoPump plug-in units are available for eachmeasurement method optoelec-tronic or thermoresistive.

• Viscometer

The meniscus passage is measu-red in calibrated viscometers. Thetype of viscometer is determinedby the liquid to be measured.

The AVSPro II Automatic ViscositySampler is designed for use withvarious viscometer types:

• Ubbelohde Viscometer(DIN and ASTM)

• Micro Ubbelohde Viscometers with TC sensors

• Ostwald Viscometer• Micro Ostwald Viscometer• Cannon-Fenske-Routine Visco-

meter

• Sample lift with sample carriers

The electric sample lift considera-bly facilitates the loading of sam-ples into the AVSPro II AutomaticViscosity Sampler. It is no longernecessary to insert them manual-ly - a simple key stroke, and thesample lifter will take them to thecorresponding position.

Two different sample carriers areavailable for easy handling ofsamples for different viscometertypes:

- carrier for 16 bottles of 100 mleach, (threaded/ground bottles)or

- carrier for 56 bottles of 20 ml each

A heatable thermoblock is availa-ble as an option.

• Sample transfer system

The sample transfer system auto-matically transfers the samples tothe respective viscometers. Theintegrated dosing module can bepositioned in three axes. Thismeans that you are free to selectwhich sample is to be dosed intowhich viscometer. The desired fil-ling quantity for each viscometeris parameterized via the PC. Theentire sample-transfer process iscontrolled by the PC and perfor-med by a PLC (programmablelogic computer).

• Transparent thermostats

The transparent thermostats weredeveloped especially for the mea-surement of viscosity in capillaryviscometers.They consist of a thermostat bathmade of paint-coated steel withheat-resistant Tempax glass win-dows and an immersion circula-tor.The main features of the transpa-rent thermostats consist theirhigh temperature constancy andthe possibility of being able towatch the flow process.

AV

SPro

II

- Fu

nct

ion

an

d c

on

stru

ctio

n

1.2

37

The conventional method of timemeasurement (i.e. the human eyeand a stop watch) may lead toimportant measurement errors.Optoelectronic or thermoresistivemeasurement using the AVSPro IIAutomatic Viscosity Samplerexcludes human errors of this type.

As a matter of course, all compo-nents of the AVSPro II AutomaticViscosity Sampler meet the hig-hest standards imposed on accu-racy and reliability.The diameter of the capillary isprecise to 1/100 mm, and the transparent thermostats with

their tempering bath have a tem-perature accuracy of ± 0.01 K at25°C according to DIN 58 966.This means that the devices meetthe national and internationalstandards for viscosity measure-ment.

The optoelectronic measurementmethod is used for limpid liquids.This type of measurement is per-formed using the VZ 8511ViscoPump.

The measurement records thetime which a liquid requires toflow through the measurementplanes of the capillary viscometer.For this process, light is intro-duced in the upper and lowermeasurement plane. During themeniscus passage, fraction andreflection change, and thus the

radiation intensity of the lightarriving from the transmitter tothe receiver. Sensors located inthe aluminium (AVS/S) or plastic(AVS/SK-PVDP) measurement tri-pods record these changes andoutput the corresponding startand stop signals for the time mea-surement.

Viscosity calculation is performedautomatically on the PC. It resultsfrom the flow time and the equa-tion required for the respectiveapplication.

The optoelectronic measurementmethod is used for limpid liquids.This type of measurement is per-formed using the VZ 8512ViscoPump.

The measurement records thetime which a liquid requires toflow through the measurementplanes of the capillary viscometer.For this process, light is intro-duced in the upper and lowermeasurement plane. During themeniscus passage, fraction andreflection change, and thus theradiation intensity of the lightarriving from the transmitter tothe receiver. Sensors located in

the aluminium (AVS/S) or plastic(AVS/SK-PVDP) measurement tri-pods record these changes andoutput the corresponding startand stop signals for the time mea-surement.

Viscosity calculation is performedautomatically on the PC. It resultsfrom the flow time and the equa-tion required for the respectiveapplication.

Opto

elec

tron

ic a

nd t

her

mor

esis

tive

mea

sure

men

t m

ethod

22.12.2.

38

Reliability by precision2

Optoelectronic measurement method2.1

Thermoresistive measurement method2.2

Fig. 1 Viscometer for optoelectro-nic measurement

Fig. 2 Viscometer for thermore-sistive measurement

Upper timing mark:

Start of time measurement

Thermistor

Lower timing mark:

Stop of time measurement

The ViscoPump plug-in units arethe core elements of the AVSPro IIAutomatic Viscosity Sampler.They control the entire measure-ment process, and via their serialinterface to the PC to the barcodereader unit or to the transparentthermostats they allow an easyand fast data exchange.

This means in detail:Within the PC, appropriate soft-ware is used for the automaticcalculation and documentationfor the subsequent evaluation ofthe viscosity of the sample to bemeasured.The barcode reader unit identifiesthe respective samples, and thethermostat head assumes thecomplete temperature supervisi-on and control of the transparentthermostats.

A ViscoPump consists of a pump,a valve block and a measurementamplifier. The pump draws thesample liquid in the capillary ofthe viscometer upward, the valveblock opens the ventilation tube,while the measurement amplifierautomatically records the signalsof the sensors and thus measuresthe flow times of the respectiveliquids.

Corresponding ViscoPump plug-in units are available both for thethermoresistive and optoelectro-nic measurement method.

The ViscoPump automaticallycontrols the following processes:• pre-tempering of the samples in

the viscometers• regulation of the pumping pres-

sure as a function of the viscidi-ty of the measurement liquidityand the viscometer used

• pumping the liquid upwards into the reservoir of the visco-meter

• measurement of the flow time• data transfer to the connected

peripherals

The front panel of a ViscoPumpcontains various connectionports:

• black threaded port for the pneumatic connection of the hose line towards the venting pipe of the viscometer

• red threaded port for connec-ting the suction line via the safety bottle to the capillary tube

• electric plug-in ports for the photoelectric barriers of the vis-cometers (5-channel socket) and for the thermistors of the TC Viscometer (4-channel socket)

• 9-channel Sub-Miniature D plug at the RS-232-C port for connecting a thermostat

39

Functional units3

Fun

ctio

nal

un

its

3

19 Sample needle in docking station53 Black threaded port:

connection of venting hose54 Red threaded port:

connection of suction hose55 Suction hose

ViscoPump-safety bottle56 Venting hose

ViscoPump/viscometer

57 Suction hoseSafety bottle/viscometer

58 Waste hoseViscometer - intermediate thread connection Waste line - solenoid valve

59 Intermediate thread connectionWaste line

60 + 62 TC Viscometer cable plugViscoPump - viscometer

61 Safety bottle63 Plug-in head of the TC Viscometer64 Filling hose

Viscometer - docking station

Vis

coPu

mp f

or t

her

mor

esis

tive

mea

sure

men

t m

ethod

3.1

ViscoPump for thermoresistive measurement method3.1

Fig. 3 ViscoPump for thermoresistive measurement

40

55 Venting hoseViscoPump - viscometer

56 Suction hoseViscoPump - safety bottle

58 Waste hoseViscometer - intermediate thread connectionWaste line - solenoid valve

59 Intermediate thread connectionWaste lineConnection for waste hoseref. to item 58

61 Safety bottle66 Suction bottle

Safety bottle -viscometer67 AVS/S measurement tripod

68 Holder for safety bottle69 Cable: 5-channel plug

ViscoPump - AVS/S

Vis

coPum

p f

or o

pto

elec

tron

ic m

easu

rem

ent

met

hod

3.1

41

ViscoPump for optoelectronic measurement method3.1

Fig. 4 ViscoPump for optoelectronic measurement

Poss

ible

ap

plica

tion

s

3.1

Examples of liquids

VZ 8511 ViscoPump for usein optoelectronic meniscusscanning:

acetonechloroformcyclohexanonedichloromethaneethanolhexaflouroisopropanolmethanolmethyl ethyl ketonem-cresolo-chlorophenolphenol/dichlorobenzenesulphuric acidtransparent paraffin oils andtransparent mineral oils

VZ 8512 ViscoPump for usein thermoresistive meniscusscanning (TC Viscometer):

mineral oils and transparent andopaque paraffin oils

At present not yet available:

formic aciddichloroacetic acidtrifluoroacetic acid

ViscoPump - Possible applications

� When using Micro Ubbelohde Viscometers with TC sensors, the ignition temperature of the measurement media has to be observed: It has to be above 250°.

42

Vis

com

eter

s

3.2

43

Viscometer tripod Rack Measurement

Type Type no. Type no.

Ubbelohde (DIN) 532… 053 92 AVS/S AVS/SK530…

Ubbelohde (ASTM) 526… 053 92 AVS/S AVS/SK

Micro-Ubbelohde 537… 053 92 AVS/S AVS/SK

Cannon-Fenske-Routine 520… – AVS/SK-CF

Micro-Ostwald 517… 053 97 AVS/S AVS/SK

Micro-Ubbelohde with 552… Holding device on CT 53 thermostat bath CT 53TC sensors

� Note: The hose combinations are to be selected according to the required application,

e.g. VZ 7010, VZ 7011 and VZ 7026.

The AVSPro II Automatic ViscositySampler allows the use of mostvarious viscometer types:DIN, ASTM, Ubbelohde andMicro Ubbelohde Viscometers aswell as Cannon-Fenske Routine,Micro TC and Micro OstwaldViscometers.

Owing to careful manufactureand quality-assurance procedu-res, all viscometers from SIAnalytics meet the highest accu-racy standards.

The K viscometer constant isdetermined individually by way ofa calibration of each glass capil-lary viscometer. Owing to the useof high-quality measurement andtesting equipment and the appli-cation of national standard gau-ges, SI Analytics guarantees anabsolutely precisely reproduciblecalibration. For all Ubbelohde vis-cometers with the same constantthe same correction seconds(Hagerbach correction) are valid.Gauging by the user is not neces-

sary, since the corrections corre-spond to the theoretical valuesfrom the operating instructionsfor the viscometers. This state-ment is true for UbbelohdeViscometers of normal size as wellas for micro viscometers.

Viscometer types, racks and measurement tripods

Viscometers3.2

Canon-Fenske-RoutineViscometer

Micro-OstwaldViscometer

Micro-UbbelohdeViscometer

Micro-Ubbelohde Viscometerwith TC sensors

The sample lift raises and lowersthe sample carrier into and out ofthe desired position. For loadingsample bottles into the carrier,press the ”down” control keys onthe forward most profile bar ofthe lift until the carrier can be loa-ded conveniently.

After filling, you press the two”up” keys, and the lift raises thecarrier upwards to the withdrawalposition.

Sam

ple

lif

t

3.3

44

Sample lift3.3

Fig. 5 Sample lift

10 Viscometer in the transparent thermostat

11 Two-hand control of the sample lift:up/down

� Please note: Due safety regulations the sample rack isonly moveable, while the PC program for the AVSPro IIis loaded and runs and the sample needle is on ist upper

position. The PC program isreleasing the sample rack auto-matically, if there is no dangerpresent to bend or damage thesample needle.

� For operation it has to be in the uppermost position. Theupper end position is reachedas soon as the sample lift hasswitched off automatically after moving upwards.

The AVSPro II Automatic ViscositySampler is designed for the useof different viscometer types(please refer to section 3.2 of the‘viscometer’ table). For this rea-son two different sample carriersare available: depending on therequired filling volume it is possi-ble to use sample carriers for 16bottles of 100 ml each (Ø 55 mm)

or for 56 bottles of 20 mm each(Ø 16 mm).For pre-tempering the samples(up to 60°C), two different hea-table thermoblocks made ofaluminium are available: for 16or for 56 samples. In this case,too, convenient loading using asample carrier is possible.

The temperature of the samplesis controlled using an adjustmentbutton located behind the flap ofthe lift. The sample carriers ofboth the standard and heatabledesigns latch in the correspon-ding holes of the sample lift.

Sample carrier3.4

Fig. 6 Sample carrier1 Sample lift33 Cased sample-carrier unit

76 Position of sample transfer to viscometer (docking station)

88 Sample carrier, loaded with 16 sample bottles of 20 ml each

Sam

ple

car

rier

3.4

45

1 3388 76

The sample transfer unit withdrawsthe samples and transfers them totheir corresponding viscometer.In this process the integrateddosing system sucks the samplethrough a hollow needle into aglass cylinder and transfers it tothe corresponding viscometer.The filling parameters for the indi-vidual viscometers are paramete-rized from the connected PC.

� The materials used for the dosing unit allow the use of almost any liquid. In the caseof very aggressive (corrosive)liquids, however, it is advisableto look them up in the table ofapplications (please refer to chapter 3.1).

The traversing motion and thepositioning of the sample withinthe dosing module is performedby three linear drives.

The first linear drive positions thesample carrier with the sample tobe measured under the withdra-wing aperture (line). The secondlinear drive moves the dosingmodule over the sample(column). The third one lowersthe needle on the dosing moduleinto the sample bottle.Subsequently, the parameterizedsample volume can be extractedthrough the dosing module fromthe sample bottle.After the needle has moved out ofthe sample bottle again, thedosing module moves to the sel-ected viscometer.The sample is then filled throughthe docking station (please refer tochapter 5.6) into the viscometer.

The central control unit (PLC) ofthe linear drives is integrated inthe AVSPro II Automatic ViscositySampler and controlled from thePC. The latter controls the mea-surement process and is connec-ted via a serial interface cable (RS-232-C) with the central con-trol unit.For a smooth running of the line-ar drives the control unit moni-tors the signals of the safety swit-ches and reports possible errorsto the PC. This ensures the preci-se and disturbance-free operationof the AVSPro II AutomaticViscosity Sampler under all cir-cumstances.

� The sequence of the programmust only be started with thesample-lift flaps and the thermostat cover being closed.

Sample transfer unit, linear drive and control3.5

Sam

ple

tra

nsf

er u

nit

3.5

46

47

The casing of the AVSPro IIAutomatic Viscosity Sampler con-sist of a profile frame made ofanodized extruded aluminiumprofile. The lining materials usedare stainless-steel sheets and PURplastics with a chemically resi-stant paint coating.

Casing and profile frame3.6

Cas

ing

an

d p

rofi

le f

ram

e

3.6

1 Sample lift2 Component carrier for 4

ViscoPump plug-in units3 Sample transfer and dosing

module

4 Waste hoses from 4 viscometers5Control elements

Fig. 7 Profile frame with back panel and fan for ventilating the interior of the AVSPro II

1 2 3 45

Viscosity depends on the tempe-rature of the sample liquid. Thismeans as a general principle thatthe viscometers have to be ther-mostat-controlled during themeasurement. The measurementtemperature has to be kept con-stant in order to obtain an accu-rate result.

This is possible on the AVSPro IIAutomatic Viscosity Sampler. TheSI Analytics transparent thermost-ats which were especially develo-ped for capillary viscometry meetthe requirements imposed onprecision and constancy. The CT53, CT 1650/4 and CT1650/4 HT,for instance, guarantee a tempe-rature constancy of + 0.02 K at a

command temperature of 10° to40°C and a max. ambient-temperature variation within arange of ± 3 K.

As a rule of thumb, one can assu-me that the temperature in termsof degrees multiplied by the fac-tor of 10 represents the %-devia-tion from the result. This meansthat a deviation of 0.05 K corre-sponds to a possible error of0.5%.

As a principle, two different trans-parent thermostats can be usedwith the AVSPro II AutomaticViscosity Sampler. For measure-ments at varying temperaturesthe CT 53 transparent thermostatis available. The AVSPro IIAutomatic Viscosity Sampler canbe equipped with two CT 53 withfour Micro UbbelohdeViscometers each.

The larger CT 1650 transparentthermostat can be used with 4measurement tripods, e.g. AVS/S.

� Please read through the sepa-rate operating instructions ofthe transparent thermostats as well.

As an option, an illuminatedpanel with an illuminated surfaceof approx. 600 x 250 mm is avai-lable for the AVSPro II AutomaticViscosity Sampler.It is fastened behind the glass paneof the transparent thermostat and

facilitates the visual control of thetemperature values of the ther-mostat bath at the verifiable, orcalibrated, glass thermometers aswell as the control of the liquidlevels within the viscometersduring the measurement.

Tran

spar

ent

ther

mos

tats

, bac

k lig

hti

ng a

nd c

oolin

g

3.73.83.9

48

Transparent thermostats3.7

Back lighting3.8

As was mentioned above, viscosi-ty measurement is highly depen-dent on the temperature con-stancy.For reasons of control technology(self heating of the thermostathead), it is therefore necessary to

use a CK 300 or CK 310 flow-through cooler as a counter coo-ler at bath temperatures excee-ding 40°C.

� Please read through the sepa-rate operating instructions ofthe CK 300 or CK 310 flow-through cooler as well.

Flow-through cooler3.9

Was

te h

ose

s

3.10

49

Each viscometer contains an eva-cuation hose leading via a soleno-id valve to a central waste hose.Two different solenoid valves areavailable for connecting the eva-cuation hoses:

• VZ 7146 type:PTFE version for all - even aggressive - liquids

• VZ 7147 type:Brass version for mineral oils, not suitable for aggressive liquids.

Waste hoses3.10

Fig. 8 Waste valves

4 Waste hose to measurement point 1:Intermediate thread connection-Waste hose - solenoid valve

37 ViscoPump - measurement point 1

38 Holding sheet for 4 solenoid valves

39 Solenoid valve to measure-ment point 1

47 Common waste line to waste bottle(PFA waste hose oØ 10 mm)

47

Evac

uat

ion

pum

p

3.11

50

To avoid splashing or spraying ofthe liquids during emptying theviscometer, the AVSPro IIAutomatic Viscosity Sampler usesa vacuum emptying feature. The

vacuum-controlled evacuationpump builds up the requiredvacuum, the sample liquid is gui-ded via the solenoid valvesthrough the evacuation hoses of

the viscometers into the com-mon waste hose and automati-cally emptied into the wastebottle.

Evacuation pump3.11

45 Flow-through cooler back panel

46 AVSPro II Automatic Viscosity Sampler back panel

47 Common PFA waste hose

48 Waste bottle: 5l suction bottle, TÜV-approved

49 Waste evacuation pump 50 Connection of counter cooler -

reverse-flow immersion circu-lator

51Connection of counter cooler-fore-runner immersion circu-lator

52 Overfill sensor

Fig. 9 Back panel of the AVSPro II Automatic Viscosity Sampler and CK 300 flow-through cooler

52

For reasons of safety, only TÜVapproved waste bottles may beused, such as the VZ 7142 5lclear-glass evacuation bottle fromSI ANALYTICS.Each waste bottle is equippedwith an interchangeable bottleunit with an overfill sensor. If thissensors signals the control unitthat the bottle is full, an opticalwarning message will be display-ed on the screen of the PC imme-diately.If this warning message isignored, the AVSPro II AutomaticViscosity Sampler will suspend allfurther measurement operations. If the bottle is not emptied within

one measurement cycle, the AVSProII Automatic Viscosity Sampler willabort the entire measurementprocess.

Emptying the waste bottle

To empty, the waste bottle, youhave to stop the measurementprogram and switch off the wastepump. Subsequently, separatethe waste hose from the bottle,and remove the interchangeablebottle unit including the overfillsensor. Please dispose of the con-tents in adherence to the environ-mental regulations.

� Under certain circumstancesthere may be a hazard of etching oneself! Please take the required precautions!

Waste bottle3.12

Was

te b

ott

le

3.12

51

The software of the AVSPro IIAutomatic Viscosity Sampler israted for PCs meeting the follo-wing minimum requirements:

• Pentium processor with a min. clock frequency of 166 MHz

• 32 MB RAM min.

• 1 GB hard disk min.• Drive: compact disc (CD-ROM)• 3.5” disk drive (floppy)• PS 2 mouse• 2 serial interfaces• Operating system:

Windows XP.

Printer:For data logging, any (Centro-nics) printer running underWindows XP can be used.

Spec

ific

atio

ns

of

the

Per

son

al C

om

pute

r

3.13

52

Specifications of the Personal Computer3.13

Work

ing

wit

h t

he

AV

SPro

II A

uto

mat

ic V

isco

sity

Sam

ple

r

4

53

Fig. 10Transparent thermostat

10 Bath of the CT53transparent thermostat

37 ViscoPump on measurement point 1 for TC Viscometer

41 Hose set for vis-cometer

42 Micro TC Visco-meter

43 Light box for back lighting

Power-up and settings

• Switched the AVSPro II Auto-matic Viscosity Sampler on withthe mains switch located on theleft side of the cover

• Set the desired language on thePC

• Select the calculation method• Set the parameters• Select the appropriate viscometer• Check the filling levels of the

thermostat baths• Switch on the transparent ther-

mostat with its mains switch• You can start the measurement

process only after the desired temperature has been reached

Loading the sample carrier

� Prior to moving the sample carrier, you should check the position of the sample needle:it has to be in the upper end position!

For loading the sample carrier,open the flaps of the sample lift:The upper flap folds upwards andlatches at the round pin on theright side, the lower flap can beopened by simply pulling it.When open, it is held in positionby a chain.Now you can press the ”down”keys to move the sample lift in itslower basic position and with-draw the sample carrier.

� When working with the bar-code reader unit, make sure during loading the sample bottles that the labels are properly aligned - they have to point backwards!

The filled sample carrier has tolatch in the corresponding holesof the sample lift. Subsequently,you can move the lift upwards bypressing the two ”up” keys. Toclose the upper flap, unlatch it bypressing the round pin.As soon as the two flaps are clo-sed you can start the measure-ment process.

� Prior to the start make sure that the sample lift is in its uppermost position

Working with the AVSPro II Automatic Viscosity Sampler4

Various functional units of theAVSPro II Automatic ViscositySampler, such as the viscometersand the ViscoPump, can bereplaced or added.

� Prior to replacing any functio-nal unit, the mains plug MUST be pulled off from the mains socket!

� Caution!Dripping liquids may cause hazard to the user!

• Remove the pneumatic and electric connections from the front plate of the ViscoPump plug-in unit to be changed.

• Loosen the screws located at the corners of the front plate.

• Use the upper and lower plug-in handle to lever the ViscoPumpout of its rear-side plug connec-tion.

• Pull the ViscoPump out of the plug-in unit.

• After inserting the new Visco-Pump plug-in unit, secure it again with the front-plate screws.

• Re-establish the electric and pneumatic connections.

Syst

em e

xpan

sion

/Ch

ang

ing

th

e V

isco

Pum

p

55.1

54

System expansion5

Changing the ViscoPump5.1

Rep

laci

ng

th

e M

icro

Ub

bel

oh

de

Vis

com

eter

s

5.2

55

1. Loosen the knurled screw, then bend the clamping sheetby 90° upwards

2. Remove the viscometer upwards, insert the new visco-meter into the holder

3. Now rotate the clamping sheet by 90° to the right and downwards into its horizontalposition; align the viscometer straight, then re-tighten the knurled screw.

Replacing the Micro Ubbelohde Viscometers with TC sensors5.2

Fig. 11 Replacing the viscometer

Rep

laci

ng

vis

com

eter

s an

d d

osi

ng

mod

ule

s

5.35.4

56

To replace the dosing module,rotate – while the system is shut-down – the upper toothed-beltwheel of the spindle to move thepiston to the bottom position.

� Do not turn as far as it will go!

As soon as the piston has reachedthe bottom position, you can pullthe module out of the key andinsert a new one.

17 Dosing module

Open the cover segment of theCT 7650/4 transparent thermost-at. Remove the hose set (suctionhose and venting line plus fillingand evacuation line) from the vis-cometer and the measurementtripod.Remove the viscometer togetherwith the rack from the AVS/S tri-pod.

Place the new viscometer in theviscometer rack.Subsequently, place both parts -aligned with the guide cam - in the tripod.

Replacing the dosing module5.4

Replacing optoelectronic viscometers5.3

Fig.13 Replacing the dosing module

Fig.12 Replacing the viscometer

17

The docking station serves astransfer point of the sample intothe viscometer (through the fil-ling hose). The needle is centredby the funnel in the docking stati-on.The O-ring in the docking stationseals the needle while the liquid ispressed into the filling hose.This O-ring may wear over time.

� Switch the AVSPro IIAutomatic Viscosity Sampler off!

Replacing the O-ringTo replace the O-ring, manuallyloosen the union nut of the fillinghose. Using a (size 10) forkwrench, loosen the O-ring guidenut, then unscrew it clockwise.Now you can remove the O-ringand insert a new one.Subsequently, replace the O-tingguide nut and tighten it using thefork wrench. Use the union nut tofasten the filling hose, then tigh-ten the union nut manually.

To change the entire docking sta-tion, you should proceed as follows:Loosen the union nut of the fillinghose by hand. Adjust a pin span-ner for the bore holes of the twoholders, then hook it in. Use a(size 22) fork wrench to loosenthe nut on the bottom side.Remove the docking station, andinsert the new one. To fasten it,proceed in reverse sequencedescribed for dismantling.

� Watch out for spilling liquid!It may be hazardous to your health!

57

Docking station - installation and disassembly5.6

The driving spindle of the dosingunit with ist bearings is a wearingpart. To guarantee an undistur-bed use over a longer period, it isnecessary to carry out regularmaintenance. After every 5-6000 working hours(2000 working hours in conti-nuous operation) the drivingspindle has to be lubricated byusing the lubricant give along.

Regardless of the regular mainte-nance the driving spindle has tobe relubricated, if running noisewill be observated.

Maintenance of the driving spindle of the dosing unit5.7

� Switch the AVSPro IIAutomatic Viscosity Sampleroff!

Remove the plastic cover of thedosing drive by loosening thetwo lateral cross-recessed screws,then unlatch the cover upwards.

� Watch out for spilling liquid!It may be hazardous to your health!

� It is inadmissible to operate the AVSPro II Automatic Viscosity Sampler without theplastic cover!

Replacing the needle5.5

Rep

laci

ng

th

e n

eed

le a

nd

th

e d

ock

ing

sta

tio

n

5.55.65.7

Typ / type Viskositätsprobenautomat AVSPro II

Viscosity Automatic Sampler AVSPro II

Bescheinigung des HerstellersWir bestätigen, dass das oben genannte Gerät gemäß DIN EN ISO 9001, Absatz 8.2.4 „Überwa-

chung und Messung des Produkts" geprüft wurde und dass die festgelegten Qualitätsanforderungen

an das Produkt erfüllt werden.

Supplier’s certificateWe certify that the equipment was verified according DIN EN ISO 9001, part 8.2.4 ”Monitoring and

measurement of product” and that the specified requirements for the product are met.

SI Analytics GmbHHattenbergstraße 10 Telefon +49 (0)6131 66-5111D-55122 Mainz Telefax +49 (0)6131 66-5101

Postfach 24 43 E-Mail: support@si-analytics.comD-55014 Mainz www.si-analytics.com

Prin

ted

in G

erm

any

ED

V 00

8 8

2722

93

Vers

ion

0904

22 M