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Van t Hoffstraat 122665 JL Bleiswijk, The NetherlandsT. 31 (0) 10 522 43 73F. 31 (0) 10 521 19 41

E-mail: [email protected]: www.tamson.com

VAT: NL 80 66 34 984 B01Bank account no.: Rabobank 16 01 00 046

Chamber of commerce 27 16 95 41IBAN Code: NL95 RABO 0160100046

Tamson Instruments bv

Rev. 2.0a UK 09-2011

ManualManualManualManual

TV4000LT

TV7000LT

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1 SAFETY AND WARNINGS ......... ........ ........ ........ ........ ........ ........ ........ ........ ......... ........ ........ ........ ...4

2 WARRANTY ..................................................................................................................................4

3

PRECAUTIONS AND HAZARDS ........ ........ ........ ........ ........ ........ ........ ........ ......... ........ ........ ........ ...5

4 INSTALLATION .............................................................................................................................6

4.1 IMPORTANT........................................................................................................................................................... 64.2 TILTING ................................................................................................................................................................ 64.3 UNPACKING .......................................................................................................................................................... 64.4 PLACEMENT AND VENTILATION ................................................................................................................................ 74.5 INITIAL USE ........................................................................................................................................................... 84.6 BATH LIQUIDS ....................................................................................................................................................... 94.7 BATH FLUID LEVEL ............................................................................................................................................... 10

4.7.1 Minimum level.......................................................................................................................................................................................104.7.2 Maximum level .....................................................................................................................................................................................11

4.8 CONNECTING ...................................................................................................................................................... 12

5 INTRODUCTION ..........................................................................................................................13

5.1 GENERAL ........................................................................................................................................................... 135.2 CONSTRUCTION .................................................................................................................................................. 135.3 CIRCULATOR....................................................................................................................................................... 135.4 TEMPERATURE CONTROL AND SETTING .................................................................................................................. 135.5 FRONT PANEL LAYOUT ......................................................................................................................................... 145.6 BACKSIDE APPARATUS ......................................................................................................................................... 14

6 OPERATING THE BATH ..............................................................................................................15

6.1 OVERVIEW MENU ITEMS ....................................................................................................................................... 156.2 SAFETY THERMOSTAT .......................................................................................................................................... 156.3 DISPLAY ............................................................................................................................................................. 156.4 WINDOW HEATING ............................................................................................................................................... 166.5 QUICKSTART ................................................................................................................................................. 16

7

MENU ITEMS...............................................................................................................................17

7.1.1 Menu item "Set point"..........................................................................................................................................................................177.1.2 Menu item "Offset"...............................................................................................................................................................................177.1.3 Menu item "Max Power" .....................................................................................................................................................................187.1.4 Menu item "Boost heater"...................................................................................................................................................................187.1.5 Menu item "Time const" ......................................................................................................................................................................187.1.6 Menu item "Stirrer" (optional) .............................................................................................................................................................187.1.7 Menu item "Low alarm" (optional) .....................................................................................................................................................187.1.8 Menu item "High alarm" (optional) ...................................................................................................................................................187.1.9 Menu item "P ID parameter" ...............................................................................................................................................................187.1.10 Menu item "Backlight" ....................................................................................................................................................................197.1.11 Menu item "Temp units".................................................................................................................................................................197.1.12 Menu item "Baudrate" ....................................................................................................................................................................197.1.13 Menu item "Restart"........................................................................................................................................................................19

7.2 PIDCONFIGURATION ........................................................................................................................................... 20

7.3

MANUAL TUNING.................................................................................................................................................. 21

8 MAINTENANCE ...........................................................................................................................22

8.1 DRAIN BATH LIQUID .............................................................................................................................................. 228.2 CLEANING........................................................................................................................................................... 23

9 TROUBLE SHOOTING.................................................................................................................24

9.1 THE MOTOR,COMPRESSOR AND LAMPS ARE DEAD. ................................................................................................. 249.2 MOTOR IS NOT RUNNING,LAMPS AND ELECTRONICS OPERATE (THE MOTOR TURNS FREELY BY HAND). ......................... 249.3 COMPRESSOR MAKES CLICKINGNOISE ................................................................................................................ 249.4 COMPRESSOR WILL NOT START............................................................................................................................. 249.5 TEMPERATURE NOT STABLE.................................................................................................................................. 259.6 BATH TEMPERATURE DOES NOT DROP ................................................................................................................... 269.7 FAULTY TEMPERATURE READING/TEMPERATURE OFFSET ....................................................................................... 26

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9.8 CONDENSATE BUILDING UP ON WINDOW................................................................................................................. 269.9 UNIT IS LEAKING WATER ....................................................................................................................................... 269.10 IT TAKES LONG TO REACH THE NEW BATH TEMPERATURE ......................................................................................... 279.11 BATH TEMPERATURE DOESN'T EQUAL SET POINT TEMPERATURE............................................................................... 27

10 TECHNICAL SPECIFICATIONS ........ ......... ........ ........ ........ ........ ........ ........ ........ ........ ......... ......28

11 PERFORMANCE TV4000LT......................................................................................................29

11.1 COOLDOWN........................................................................................................................................................ 2911.2 RECOVERY TEMPERATURE DISTURBANCE .............................................................................................................. 3011.3 STABILITY AT 29C............................................................................................................................................. 3111.4 STABILITY AT +20C........................................................................................................................................... 3111.5 STABILITY AT 0C............................................................................................................................................... 3211.6 STABILITY AT -10C............................................................................................................................................ 3211.7 STABILITY AT -20C............................................................................................................................................ 3311.8 STABILITY AT -30C............................................................................................................................................ 3311.9 STABILITY AT -40C............................................................................................................................................ 34

12 STABILITY TESTS TV7000LT...................................................................................................35

12.1

COOL DOWN ....................................................................................................................................................... 35

12.2

STABILITY AT 0C............................................................................................................................................... 35

12.3 STABILITY AT -10C ............................................................................................................................................ 3612.4 STABILITY AT -20............................................................................................................................................... 3612.5 STABILITY AT -30............................................................................................................................................... 3712.6 STABILITY AT -40C ............................................................................................................................................ 3712.7 SETTLING TIME (AT -10C)................................................................................................................................... 3812.8 SETTLING TIME (AT -30C)................................................................................................................................... 38

13 RS 232 C INTERFACE..............................................................................................................39

13.1 GENERAL SETTINGS............................................................................................................................................. 3913.2 COMMANDS OVERVIEW ........................................................................................................................................ 3913.3 RS232CABLE ................................................................................................................................................... 40

14 ORDERING CODE....................................................................................................................41

15 SPARE PARTS LIST.................................................................................................................41

16 ADDENDUM: TECHNICAL REFERENCE ........ ........ ........ ........ ........ ........ ......... ........ ........ ........ .42

16.1 TECHNICAL DRAWING .......................................................................................................................................... 42

17 EC DECLARATION OF CONFORMITY THERMOSTATIC BATH TV4000LT AND TV7000LT...... .43

18 DISCLAIMER............................................................................................................................44

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Rev. 2.0a UK 09-2011

1 SAFETY AND WARNINGS

Make sure before installing or operating the equipment to read and understand all instructions and safetyprecautions listed in this manual. If there are any questions concerning the operation of the equipment orabout the information given in this manual please contact your local dealer or our sales department first.

Performance of installation, operation, or maintenance other than those described in this manual may resultin a hazardous situation and may void the manufacturer's warranty.

Never operate equipment that is not correctly installed. Unqualified personnel must not operate theequipment. Avoid damage to the equipment, or its accessories, caused by incorrect operation.

Important:- When performing service, maintenance or moving the apparatus, always disconnect at the mains

socket of the apparatus.- Proper skilled and trained personnel are only allowed to operate this equipment.- Take notice of warning labels and never remove them.

- Refer service and repairs to a qualified technician.- If a problem persists, call your supplier or Tamson Instruments b.v.

2 WARRANTY

Tamson Instruments b.v. warrants that all their manufactured equipment is free from defects in material andworkmanship preventing the machine from normal operation. Tamson Instruments bv does not warrantythat the equipment is fit for any other use than stated in this manual. The manufacturer can only be heldresponsible for the security, reliability and performance of the equipment when operated in accordance withthe operating instructions, extensions, adjustments, changes and/or if repair is performed by TamsonInstruments b.v. or authorized persons only. This warranty is limited to one year from the date of invoicing.

All equipment and materials are subject to standard production tolerances and variations.

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3 PRECAUTIONS AND HAZARDS

Before attempting to operate the bath read all partsof this manual carefully to ensure proper operation

and avoid damage to the equipment or itsaccessories.

If a malfunction occurs consult the section TROUBLESHOOTING found on the page 24 at the end of thismanual. If the problem persists, call your supplier orTamson Instruments b.v.

Never operate the equipment if not correctly installed.The equipment must be operated only by qualifiedpersonnel. Avoid damage to the equipment or itsaccessories through incorrect operation.

-Use temperature and chemical resistant protectionmaterial when operating the bath.

-Preventing overflow. Use chemical and temperatureresistant materials.

-Prevent dangerous fumes or vapour and useappropriate ventilation. Methanol vapour can causeexplosion hazard.

-Do not move apparatus when filled.

-Do not place apparatus and waste container inwalking area when operating.

-Use appropriate bath liquid.

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4 INSTALLATION

4.1 ImportantTamson Instruments b.v. is not responsible for anyconsequential damage or harm caused by using thisbath. Repairs on the electrical system of the bath mayonly be carried out by well trained and authorizedpersons.

4.2 TiltingBefore unpacking inspect the tilt watch located on theoutside of the packing. When the tilt watch indicates ared color contact Tamson instruments and the forwarderbefore continuing with unpacking.

4.3 UnpackingBefore leaving the factory Tamson baths are adequatelypacked to prevent damage during normal transportation.Check the packing for external damage and make anote on the shipping documents if any damage is found.Always retain the cartons and packing material until thebath has been tested and found in good condition.(Transport companies generally will not honor a claimfor damage if the respective packaging material is notavailable for examination).

The shipment contains at least the bath as mentioned inthe delivery checklist. Further the consignment might

contain one or more viscometers which should beindividually packed in small boxes with the calibrationcertificate included in the box, as well as ASTMthermometers, thermometer holders, etc. Please see thepacking list for details concerning total contents ofconsignment.

Before filling the bath remove any remainingpacking material from its interior. The interior of thebath can be accessed by taking off the lid on the topof the bath.

REMOVE ALLPACKAGE

MATERIAL

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4.4 Placement and ventilation

Air circulation has to be enabled by 10 cm of freespace at both sides and 15 to 20 cm at the rear ofthe bath.

The bath has to be placed in a well ventilated area.

10 CM

10 CM

20 CM

AIR FLOW

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AirflowAir must pass the apparatus freely. The air transportsthe heat from inside the apparatus to the environment.When airflow is blocked the apparatus will not performto its specifications and it may harm the equipment oreven cause mechanical damage.

DustDo not place the bath in a dusty environment. Dust willblock the condenser unit inside the apparatus which willlead to severe mechanical damage.

Regularly check the apparatus and condenser unitfor dust. Remove dust with a vacuum cleaner. DoNOT remove dust with compressed air.

LeakingInside the bath on the cold parts condensate and icecan build. When the apparatus is switched off this meltwater may leak onto the floor. Do not place theapparatus on a floor which can be damaged by this meltwater. The amount of water is limited to a few ml/hr.

4.5 Initial use

Due to transportation allow the bath a 24 hourperiod for stabilization. This applies also when theapparatus has been tilted or fallen.

Do not switch on power, because lubrication-oil insidethe compressor system has to run into the capillary.It will take several hours before the oil has flown backinto the compressor unit. When the apparatus isimmediately turned on after it has been tilted, severedamage may occur to the compressor unit due toinsufficient lubrication.

AIR FLOW

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4.6 Bath liquids

The bath must be filled with a liquid suitable for theminimum operating temperature.

It is very important to select a liquid with a viscositypreferably less (e.g. 3 cSt) at the operatingtemperature and a flash point which is well abovethe operating temperature.

The best bath liquid to be used is methanol,enabling circulation at very low temperatures.

Methanol is extremely flammable and can cause firehazard. Take all necessary precautions to reduce firehazard.When using methanol all vapors must be removed by

using appropriate air ventilation.

Methanol is toxic and can cause health risks. Useappropriate ventilation and other precautions to preventinhaling toxic vapors. If ventilation is insufficient the riskof explosion hazards can occur!

The supplier of the bath liquid (methanol) will be able tohand over all chemical details and safety precautionsrelated to the use of methanol. These precautions mustbe followed when operating the bath.

VISCOSITY

< 10 cSTFLASH POINT> OPERATING

TEMP.

METHANOL

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Extreme HAZARDDo not use methanol at temperatures above 40C.The methanol will vaporise and cause toxic and

flammable vapours. Explosion hazard can build upin or around the bath

When working at temperatures above 40C, oil orwater can be used as an alternative.

Water, water-glycol, mineral or silicone oil also areliquids applicable to use in this bath.

Do not use distilled water. Distilled water can causecorrosion to the stainless steel inner bath and itsparts. Filtered water from reversed osmosesapparatus can be used without problem.

4.7 Bath fluid level

4.7.1 Minimum level

The minimum fluid level is just above the baffle plate.When fluid level is lower than the baffle plate circulation

will be insufficient causing instability and nonhomogeneousness of the fluid temperature .

The level indicator on the front panel will start to blink(blue light) when the fluid level is too low.

Minimum level:1 cm above

baffle plate

below +10CUse waterglycol ormethanol

Methanol:Do not

operate >

40C

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4.7.2 Maximum level

Caution:When using Methanol one must be worn that the

fluid shrinks dramatically when cooled down. If thebath is filled at these low temperatures up to itsmaximum level the bath will overflow when heatingup.

If the fluid level is too high, it will leave the bath via theoverflow outlet (10mm outer diameter pipe) placed ontop on the left hand side of the bath. When a hose isconnected to this overflow drain, the expandedmethanol can flow back into the connected wastecontainer or jerry can.

Pay attention to following:

- Use chemical resistant materials (hose and container(jerry can),- Use appropriate indication on jerry can,- When working at higher temperatures use temperatureresistant materials,- Prevent fumes from escaping,- Do not place the container in the walking area butstorage space next to the apparatus.

Check container:- chemical resistant

- Withstand fluidtemperature

Max. level:1 cm below

top lid

PREVENT

OVERFLOW

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!

?

When operating at high temperatures the lid (of thebath), top plate and the window section of the bathbecome very hot. Always use heat protective

gloves. Care must be taken when placing or re-moving material from the bath.

Pay attention when removing hot fluid:

Use heat protective clothing and wear gloves andsafety glasses.

4.8 Connecting

Before plugging TV bath into mains socket, make surethe voltage of the bath corresponds to the local voltageand frequency.

Use a mains supply that is well earthed, clean ofinterference and suitable for the acquired electricalload of the bath.

WELL EARTHED

CHECK VOLTAGE

WEAR PROTECTIVEGLOVES , CLOTHING

AND EYE

PROTECTION.

WEAR HEATPROTECTIVE

GLOVES

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5 INTRODUCTION

5.1 GeneralThe TV4000LT and TV7000LT apparatus basicallyconsists of a combination of a cooling system andmicroprocessor controlled heating element. The designensures a high degree of accuracy and reproducibility oftemperature control.

5.2 ConstructionThe TAMSON baths are constructed entirely fromcorrosion-resistant materials such as stainless steel andPTFE (Teflon). The bath is effectively insulated againstheat loss by a layer of Armaflex rubber between theinner tank and outer casing and the use of twomultilayer thermo-pane windows.

5.3 CirculatorThe stirrer is built-in to guarantee an uniformtemperature distribution within the bath (see Technicalspecifications page 28)

5.4 Temperature control and settingThe bath temperature is regulated using a PT-100temperature probe Class-A connected to amicroprocessor module. The advanced electroniccontrol system continually computes the energy inputrequired for optimal temperature accuracy and stability.Temperature read-out is on a LCD display. The actual

set point is computed within the controller with a relativeaccuracy of 0.001C. For further details about accuracyand range see "Technical specifications" page 28.

The heat removal (cooling) is automatically selectedfrom the set-point temperature setting.The set-point temperature in the selected range thancan be set on the controller with its blue front, seeMenu item "Setpoint" page 17.

To obtain an energy friendly control of the temperaturethe cooling has been split in four stages:1 Heating only, no cooling,

2 Limited capacity cooling (single compressor andbypass - short),3 Limited capacity cooling (single compressor and

bypass - long),4 Half cooling capacity (single compressor),5 Full capacity cooling (two compressors).As the set point temperature is controlled by heatingagainst the heat removal, it is obvious that by limitingthe cooling capacity this way of control is more energyfriendly than conventional systems. If full heat removalcapacity is used at 0C over 2 kW (TV4000LT, 3 kWTV7000LT) of heating should be applied, instead of thecurrent 300 watt.

COVER

BATH

WINDOW

1

2

4

5

-40C -20C 0C +30C +80C+15C

3

Automatic selection of heat removal

ON/OFF SWITCH

MENU SELECT

DISPLAY

DRAIN

WINDOW

HEATING

OVERFLOW

VISCOMETER

HOLDERS

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100

0

300

200

5.5 Front panel layout

The front panel layout shows the turn-push button:

Next / increase: Turn right

Previous / decrease: Turn left

Select: Press

5.6 Backside apparatus

On the top - backside of the bath following can be indicated:

Item Description Function

1 LCD Display Shows bath parameters2 LED (red) Over temperature indicator3 LED (blue) Level indicator4 LED (yellow) Error5 LED (green) Heater indicator6 Switch Mains switch7 Button Turn-push button

4 1

5

3

2

67

1: Motor fuse2: Safety thermostat (overtemperature protection)3: RS232, female

1

3

2

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6 OPERATING THE BATH

When the bath is ready for use it can be switched on bypressing the mains switch. The bath will initialise andcalibrate itself.

6.1 Overview menu itemsSetpoint- Offset (press:

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Ad 3: Boost Bath is heating to set pointusing boost heater

Heating Bath is heating to set point,boost heater is off

Cooling Bath is cooling down to setpoint

Tuning Ratio Bath is tuning for power neededat set point, first step

Tuning SA Bath is tuning, second stepPID SP=25.00 Bath is controlling, set point is

25.00C (example)Ad 4:- Bath control is stable

- Alarm high, press button to reset

- Alarm low, press button to reset

6.4 Window heatingThe TV4000LT and TV7000LT have heated windows toprevent build up of condensate. The heating isthermostat driven and kept around 30C. If heating is off

and the inner bath cooled down, the outside windowalso will drop in temperature forming a cold surface.This surface quickly will be covered with condensateblocking the visibility.

Window heating can be switched on or off separatelyfrom the TV-LT system. When the window heating is on,the green lamp of the switch will light.

6.5 QUICK STARTTo start operating the bath in a quick way do thefollowing:

Fill the bath with liquid as indicated, place the powerplug, connect to mains socket, switch-on the bath, usingthe mains switch, select appropriate set point.

PID settingsAll measuring results have been acquired usingfollowing PID settings:Pb := 25I := 16D := 0Under different settings its possible to achieve evenbetter values by trimming the PID settings.

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7 Menu items

Use the turn-push button to select a menu item andselect the item by pressing the button. After pressing asign appears next to the value indicating the value cannow be changed. Pressing the button again activatesthe value immediately. When the value is altered but thebutton is not pressed the value will be accepted andstored after 5 seconds automatically. The menu returnsback to normal operating mode.

7.1.1 Menu item "Set point"Select the set point temperature. Resolution is 0.01C +/-the system accuracy.

There bath can be cooled down more rapidly by enteringthe minimum set point of -40. Both compressors are thanswitched on and the systems cools down fastest. Whenthe bath has reached a temperature just below thedesired SP, set the new SP. For example if the bath isrunning at 40C and the operator wants to lower thetemperature to 5C. Set the SP to -40C. When the unithas reached 4C set the new SP to 5C. The unit will thanheat and get stabilised around 5C.

Care must be taken when using water as there is a risk offreezing.

The reason for following this procedure is technical and is

caused by the way the cooling capacity is adapted overthe temperature span of the bath.

If the unit does not get stable have a look at the PIDparameters. These settings are explained in the manual.Standard values are 25, 16 0. If the unit fluctuates toomuch try to increase the P to 50 or 100 and the I to 50.

To get stable temperature control with small variations is asecure procedure and may take effort to realise.

7.1.2 Menu item "Offset"The temperature displayed can be increased or

decreased with an offset ranging from +5.00 down to -5.00 in steps of 0.01C.

The offset will synchronise the bath temperature readoutwith an independent separate thermometer.

If there remains an offset try to decrease the P down to 2(instead of 25). The offset is due to the PID setting anddepends on the applied power percentage. When thepower percentage is below 15% the P value must belower than 25, i.e. 10.

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7.1.3 Menu item "Max Power"(press: low, med, hi, max)

Limits the applied power by a maximum value:Low Maximum of 25% appliedMedium Maximum of 50% appliedHigh Maximum of 75% appliedMaximum 100% power is appliedLimiting the power can be used to lower overshoottemperature..

7.1.4 Menu item "Boost heater"A secondary heater is used to quickly heat up the bath.This menu item enables or disables the heater.Standard value: On

7.1.5 Menu item "Time const"Used to select time to tune. The option precise has to beused to reach maximum temperature accuracy. Optionsare:- Fast 60 seconds- Medium 120 seconds- Slow 180 seconds- Precise 240 secondsStandard value: Precise

7.1.6 Menu item "Stirrer" (optional)Optional: Stirrer 0 .. 100% (step 6%). Inactive

7.1.7 Menu item "Low alarm" (optional)Optional: min SP to max SP. resolution 0.1C.

No hardware connected, display function only.

7.1.8 Menu item "High alarm" (optional)Optional: min SP to max SP. resolution 0.1C.No hardware connected, display function only.

7.1.9 Menu item "PID parameter"PID set 1 -PID set 2 - deactivatedPID set 3 - deactivatedPID set 4 - Activated when communication

via RS232

Each set offers individual PID settings for:Proportional band valueIntegrating valueDifferentiating value

Default sett ingsPb* := 25I := 16D := 0*Pb= proportional band. Proportional value P is found to be 100/Pb.

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If there remains an offset in the temperature readout try toincrease the I to 25 or 50. The offset is due to the PIDsetting and depends on the applied power percentage. Anoffset of 0.1C can be adjusted with the offset valueavailable in the menu or when increasing the PIDintegrator value to 25 or 50.

7.1.10 Menu item "Backlight"OnOffStandard value: On

7.1.11 Menu item "Temp units"CFStandard value: C

7.1.12 Menu item "Baudrate"30060012002400480096001920038400Standard value: 9600

7.1.13 Menu item "Restart"Restarts system and activates tuning

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7.2 PID configurationThe two graphs below show the influence of the integralsetting. The graph on top has a setting of 200 for theintegral parameter. The bottom graph has a setting of 16.The value of 200 causes less stable control.

I = 16

I = 200

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7.3 Manual tuningThe temperature control of the bath is based on a digitalPID system. When using different fluids in the bath eachwith their own heat capacity, the use of external coolingand external connected processes(circulation), orworking at different set point temperatures requires newsettings of the PID parameters. These parameters haveto be optimised after changes to the system whenoptimal and accurate temperature control of the bathliquid is required.

Tuning of the bath results in:

Stable temperature control of the bath, No over- or undershoot of the temperature set point, Quick response to deviations from the set point caused

by external disturbances.

Tuning can be done automatically or manually.

Parameter Description DisplayProportional band The bandwidth in display-units over which the output power is

proportional between minimum and maximumProp

Integration time Determines the time taken by the controller to remove steady state errorsignals

Integ

Derivative time Determines the time taken by the controller to react on error signals. DiffTable 1 Parameters influencing the temperature control

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8 MAINTENANCE

8.1 Drain bath liquidThe bath can be emptied via the drain tap located at theleft side of the apparatus. For safety reasons the tap canonly be opened by using a screwdriver. The threadinside the tap is 5/8".

Take necessary precautions against fire hazardwhen removing flamable bath fluid.

When removing bath fluid do not inhale toxic vapor.Always use appropriate ventilation.

Handle old bath fluid as toxic waste.

Cool down bath fluid to ambient before removing.

USESCREWDRIVERTO OPEN DRAIN5/8" BSP insidethread

Do not drainhot liquid !!

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8.2 Cleaning

Regularly check the apparatus and condenser unitfor dust. Remove dust with a vacuum cleaner.

Do NOT remove dust with compressed air.

Remove panel from TV4000LT or TV7000LT. Usevacuum cleaner to remove dust.

4 x screw

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9 TROUBLE SHOOTING

9.1 The motor, compressor and lamps aredead.

-Check the main voltage and all electrical connections,including switches.

-Check fuse in wall socket of mains supply.

-Check the safety thermostat. See Safety thermostatpage 15.

9.2 Motor is not running, lamps andelectronics operate (the motor turns freelyby hand).

-Motor overloaded. The motor protection may tripbecause of mechanical overload. Reset the fuse bypushing button on rear side of the motor housing.

-The motor capacitor is defective. Replace motorcapacitor inside the system.

-Malfunctioning wiring. Check wiring.

9.3 Compressor makes clicking noise-Bath has been switched on and off to quickly. Waitapproximately 10 minutes before switching on again.The clicking noise is a temperature fuse inside thecompressor preventing it from overheating.

-Clean the condenser unit and make free from dust. Airmust pass the inside of the unit freely.

9.4 Compressor will not startWhen the machine has been switched off the pressurein the cooling circuit can rise to a high level. For thisreason the apparatus has to settle the pressure of thecooling liquid for a few minutes before it can berestarted.

When this problem occurs more often it will indicate thatdust is blocking the condenser circuit. Clean the inside

of the TV4000LT / TV7000LT and remove all dust fromthe condenser unit and fan with a vacuum cleaner. Donot use pressurized air to remove dust. The flying dustparticles can damage the fan bearings, are veryunhealthy when breathed in and can lead to severe eyeproblems.

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9.5 Temperature not stable- Restart system (option from menu, see Menu item

"Restart" page 19 )- Place top lid on the bath.- Check PID settings. When PID settings are incorrectthe system can start to be unstable. Graph (SP-40PID25-200-0) shows unstable control at -40C due to ahigh setting of I=200. Lowering this value to 20 resultsinto control of better than 0.02C

Standard PID setting:Pb*=25I=16D=0*Pb= proportional band. Proportional value P is found tobe 100/Pb)- System connected to RS232. PID settings 4 areused. Change settings with Tamcom to Pb=25, I=16,D=0.- Check mains supply for stable power. Graph belowshows heavy disturbance due to fluctuations in mains

supply. Temperature accuracy is heavily disturbed byvoltage fluctuations due to switching on and off heavyapparatus at mains supply. Previous graph(SP-40PID=25-200-0) and graph below (SP-40 PID=25-20-0)are same apparatus.

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9.6 Bath temperature does not drop- Check set point setting (option from menu, see Menu

item "Setpoint" page 17 )- Restart system (option from menu, see Menu item

"Restart" page 198 )

9.7 Faulty temperature reading / temperature

offsetThe temperature read out on the display does notcorrespond to the temperature measured.-When the controller starts or is restarted, the displayedvalue increases to a stable readout appears after a fewseconds.- PT100 is defective- PT100 has aged.- Check offset in menu

9.8 Condensate building up on window- Fuse window heating defective. Check fuse inside the

system. Replace when defective

- Measure shortcut caused by condensate in heatingelements.

9.9 Unit is leaking water- Inside the bath on the cold parts condensate and ice

can build. When the apparatus is switched off this leakonto the floor. Do not place the apparatus on a floorwhich can be damaged by this leakage. The amount ofcondensate water is limited to a few ml/hr

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9.10 It takes long to reach the new bathtemperature

- There is a possibility to cool down rapidly by enteringthe minimum set point of -40. Both compressors areswitched on and the systems cools down fastest.When the compressor reached a temperature just 1degree below the desired SP, set the new SP. Forexample if the bath is running at 40'C and the operatorwants to lower the temperature to 5C. Set the SP to -40C. When the unit has reached 4C set the new SPto 5C. The unit will heat and stabilize around 5C.

- When using water as bath medium care must be takento prevent freezing.

- If the unit does not get stable have a look at the PIDparameters. These settings are explained in themanual. Standard values are 25, 16 0. If the unitfluctuates too much try to increase the P to 50 or 100and the I to 50.

9.11 Bath temperature doesn't equal set pointtemperature

- If there remains an offset on the display relative to theset point temperature, lower the proportional "P- value"down to 10 or 2. A relative large offset (0.1C) canoccur when applied power is below 15% and theproportional value too high (>2).

- Viscosity bath fluid to high. Viscosity should be lowerthat 3cSt at set point temperature. Using water and

Methanol have no problems concerning viscosity.

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10 TECHNICAL SPECIFICATIONS

Item Unit TV4000LT TV7000LT

Temperature range [C] -40 .. 100 -40 .. 100

Setting [C] 0,01 0,01

Stability* [C] 0,02 0,02Uniformity* [C] 0,02 0,02

Temperature linearity full range [C] 0,2C 0,2C

Heating [W] 1000W + 200 1500W + 500

Heaters (combined) 2 2

Bath volume [L] 40 70

Opening [mm] 260 x 240 260 x 240

Depth [mm] 300 600

Length [mm] 500 500

Width [mm] 680 680

Height [mm] 1150 1450

Weight [kg] 100 120

Power [Watt] 3000 Max 3500 Max

Voltage [Volt] 230-50HZ 230-50HZ

Noise (1mtr, average) [dB] 61 61

* Absolutemin/max value measured over 1hrsin methanol

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11 PERFORMANCE TV4000LT11.1 Cooldown

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11.2 Recovery temperature disturbanceFollowing graphs show temperature recovery at -20C and +20C of the TV4000LT system after atemperature disturbance.

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11.3 Stability at 29CBath liquid used is methanol

11.4 Stability at +20CBath liquid used is methanol

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11.6 Stability at -10CBath liquid used is methanol

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12 STABILITY TESTS TV7000LT12.1 Cool down

Bath liquid used is methanol


Temperature drift TV7000[Ref. TV7000_01.xls]

0

0,05

0,1

0,15

0,2

0,25

0:00:00

0:06:36

0:13:12

0:19:48

0:26:24

0:33:00

0:39:36

0:46:12

0:52:48

0:59:24

1:06:00

1:12:36

1:19:12

1:25:48

1:32:24

1:39:00

1:45:36

1:52:12

1:58:48

2:05:24

2:12:00

2:18:36

2:25:12

2:31:48

2:38:24

2:45:00

2:51:36

2:58:12

3:04:48

3:11:24

3:18:00

3:24:36

3:31:12

3:37:48

Time [hh:mm:ss]

Temp.[C

]

Bath

Probe(B)

0.019C

0.01C

Bath

Probe(A)0.032C

0.016C

PID 2;240;40, SP=0C, Homogeinety = 0.012C

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12.4 Stability at -20Bath liquid used is methanol

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12.5 Stability at -30Bath liquid used is methanol


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12.7 Settling time (at -10C)Bath liquid used is methanol

12.8 Settling time (at -30C)Bath liquid used is methanol

Temperature stabilisation

-15,000

-10,000

-5,000

0,000

5,000

10,000

15,000

0:00

:00

0:02

:34

0:05

:08

0:07

:42

0:10

:16

0:12

:50

0:15

:24

0:17

:58

0:20

:32

0:23

:06

0:25

:40

0:28

:14

0:30

:48

0:33

:22

0:35

:56

0:38

:30

0:41

:04

0:43

:38

0:46

:12

0:48

:46

0:51

:20

0:53

:54

0:56

:28

0:59

:02

1:01

:36

1:04

:10

1:06

:44

1:09

:18

1:11

:52

1:14

:26

1:17

:00

1:19

:34

1:22

:08

1:24

:42

1:27

:16

1:29

:50

Time [hh:mm:ss]

TempC

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13 RS 232 C Interface

The bath is equipped with a RS 232 C interface whichallows the communication with a computer.

Please see our separate manual "communication.PDF" and Tamson software to use the bath remotely

or use the software as datatlogger.

13.1 General settings

Baudrate can be selected using the menu option "Baudrate". In example4800

Data setting parameters are fixed (can not be altered):8 data bits1 stop bitparity none

13.2 Commands overview

Notationcommands are place between brackets "[ ]"values are placed between "< >" signs(Do not use these brackets when sending commands.)

[ST] returns whether bath is stable or not. State 1 = stable, 0 not stable. Limits are set with parametersStableLimitHigh and StableLimitLow defined by ASTM D445. So when PV is in the region of100C>PV

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$52 : Successive approximation in progress$53 : end of sucessive approximation stage$60 : Proportional mode (subject to change - other values to be defined)

[CS]Sets state of control algorithm

[HP] Returns current heater power percentageHP : sets heater percentage to - this command is only useful if control algorithm suspended withCS command.[AC] Returns 1 when a new temperature value is available, 0 if no new has been measured since thelast PV or PVH command. Cleared by PV or PVH command. Used for external PC control synchronization.PV Returns Process Value with unit, no decimals. 23C or 74F[PVF] returns temp as follows :Use PVF to return a decimal value with 7 decimal digits, e.g.12.345342C, works for degrees Centigrade, and degrees Fahrenheit. Only first three are significant. Whenreading is in degree Fahrenheit character F indicates the unit i.e. 73.3961328F

When temperature is negative, minus sign appears i.e. -1.6955468F

[PP] returns proportional band value. Proportional band is 100/gain[PI] returns integrating value[PD] returns derivative value

PID range and set:

[PP] Followed by value, or space and value, will set proportional band. I.E. PP25 will set Proportionalband to 25.

[PI] Followed by value, or space and value, will set integrating value. I.E. PI16 will set Integration valueto 16.

[PD] Followed by value , or space and value, will set integrating value. I.E. PD2 will set Derivative valueto 2.The TMC70 contains 4 independent PID sets. Each set can be enabled using the TMC70.EXE program andcan have its own name i.e water, silicone oil or methanol. However when the command PP, PI, or PDis used to set a value, automatically set 4 is used.So PID set4 is reserved for RS232 operation and isactivated when approached from RS232.

[SP] Set point temperatureSP, Set point temperature is returned i.e. 20.22SP22.50 sets set point temperature to 20.50CWhen controller displays temperature in F, SP20.50 sets the set point to 20.50FSP22.555 results in error code "10"

13.3 RS 232 Cable

D-connectorSeen on

BACKSIDE

(female)

D-connectorSeen on PIN

side (male)

Pin 1Pin 1

Flatcable 9-pole

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14 ORDERING CODE

Item voltage ordering codeTV4000LT 230V/50Hz 00T0460

TV4000LT 230V/60Hz 00T0462TV4000LT 115V/60Hz 00T0465TV7000LT 230V/50Hz 00T0450TV7000LT 230V/60Hz 00T0452TV7000LT 115V/60Hz 00T0455

15 SPARE PARTS LIST

Voltage230V(50/60hz) 115V(60hz) Item

04T0061 04T0161 Stirrer complete TV4000LT04T0062 04T0162 Stirrer complete TV7000LT24T8080 24T8082 Motorfuse 0.6 Amp.

24T3300 Capacitor 7uF24T3312 Capacitor 25uF

25T0215 25T0217 Heater 500W/1500W06T0512 06T0522 Power TMC70

28T4009 Front foil28T3904 Indicator safety thermostat24T8545 Mains switch24T8581 Safety cut-out thermostat24T7580 Knob safety thermostat27T3056 Solid State Relay 16A S216S0228T4026 PT-100 sensor28T2052 Mains relais28T2057 Relais timer06T0500 PCB micro controller TMC7006T0502 PCB display TMC7006T0505 PCB IO/cooler TMC7006T0511 PCB power TMC7024T7089 Wheel 80mm, no break24T7090 Wheel 80mm, with break10T2200 Knob insert light-blue turn-push button10T2205 Knob light grey turn-push button

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16 ADDENDUM: TECHNICAL REFERENCE

16.1 Technical Drawing

Compressors

A

G

FE

D

C

B

Sight glass +

dryerReservoir

Evaporator

Condenser

TEV

High Pressure

Low Pressure

by-pass

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17 EC declaration of conformity thermostatic bath TV4000LT and TV7000LT

Manufacturer: Tamson Instruments BVvan 't Hoffstraat 122665 JL BleiswijkThe Netherlands

Product: Thermostatic bath

Model: TV4000LTTV7000LT

The products to which this statement relates, is manufactured and dully carried out in compliance with theprovisions of Directive 89/336/EEC on the approximation of the laws of the Member States relating toelectromagnetic compatibility.

The products are in conformity with the following specification:

EN 50081-1 : 1992EN 50082-2 : 1995EN 61000-3-2 : 1995EN 61000-3-2 : 1995

June 2005, Tamson Instruments bv, The Netherlands

Ing. R.C. van HallDirector

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18 DISCLAIMER

Information given herein is offered in good faith as accurate, but without guarantee. Conditions of use andsuitability of the product for particular uses are beyond our control; all risks of use of the productare therefore assumed by the user.

We expressly disclaim all warranties of every kindand nature, including warranties of merchantabilityand fitness for a particular purpose in respect to the

use or suitability of the product.

Nothing is intended as a recommendation for uses which infringe valid patents or as extending licenseunder valid patents. Appropriate warnings and safe handling procedures should be provided to handlersand users. Alteration of this document is strictly prohibited. Except to the extent required by law,republication or retransmission of this document, in whole or in part, is not permitted. Tamson Instrumentsbv assume no responsibility for accuracy of information. Tamson Instruments neither represent nor warrant

that the format, content or product formulas contained in this document comply with the laws of any othercountry except the Netherlands.

Tamson Instruments bv, All rights reserved.

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