Tamson Instruments TV2500 User manual

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man-tv2500.dc Rev. 1.38UK 0321
Tamson Instruments bv
ISO 9001 : 2015
NL/PRO 238239125
USER-
MANUAL
TV2500
TV3500

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Van ’t Hoffstraat 12
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T. 31 (0) 10 522 43 73
man-tv2500.dc Rev. 1.38UK 0321
Tamson Instruments bv
ISO 9001 : 2015
NL/PRO 238239125
1SAFETY AND WARNINGS ......................................................................................................................3
2WARRANTY .............................................................................................................................................3
3PRECAUTIONS AND HAZARDS ............................................................................................................4
4INSTALLATION........................................................................................................................................5
4.1 IMPORTANT..........................................................................................................................................5
4.2 UNPACKING .........................................................................................................................................5
4.3 BATH LIQUID........................................................................................................................................6
4.4 COOLING ...........................................................................................................................................10
4.5 CONNECTING .....................................................................................................................................10
5INTRODUCTION.....................................................................................................................................11
5.1 GENERAL ..........................................................................................................................................11
5.2 CONSTRUCTION .................................................................................................................................11
5.3 STIRRER............................................................................................................................................11
5.4 TEMPERATURE CONTROL AND SETTING...............................................................................................11
6SAFETY FEATURES..............................................................................................................................12
6.1 SAFETY WINDOW................................................................................................................................12
6.2 OVERTEMPERATURE SAFETY ..............................................................................................................12
6.3 SPILL TRAY........................................................................................................................................12
6.4 LEVEL PROTECT ................................................................................................................................12
7OPERATING THE SYSTEM...................................................................................................................13
7.1 BACKSIDE..........................................................................................................................................13
7.2 FRONT PANEL LAYOUT .......................................................................................................................13
7.3 DISPLAY READOUT.............................................................................................................................15
7.4 QUICK START,ADJUST SET POINT .......................................................................................................16
7.5 TUNING..............................................................................................................................................16
7.6 MANUAL TUNING ................................................................................................................................17
8TECHNICAL SPECIFICATIONS............................................................................................................18
8.1 USING WATER AS A BATH FLUID ..........................................................................................................18
8.1.1 General results .........................................................................................................................18
8.1.2 Stability using water as bath a fluid ..........................................................................................19
8.2 USING MINERAL OIL AS A BATH FLUID..................................................................................................20
8.2.1 General results .........................................................................................................................20
8.2.2 Temperature stability using mineral oil as a bath fluid .............................................................20
9TROUBLE SHOOTING...........................................................................................................................22
9.1 APPLICATION ERRORS........................................................................................................................22
9.2 BATH MALFUNCTION...........................................................................................................................22
9.3 PROBLEMS WITH SET POINT................................................................................................................22
9.4 FAULTY TEMPERATURE READING OR TEMPERATURE OFFSET................................................................22
9.5BATH TEMPERATURE DOES NOT BECOME STABLE................................................................................23
9.6 OFFSET DISPLAY READOUT.................................................................................................................23
9.7 FLUID LEVEL......................................................................................................................................24
10 SPARE PARTS LIST ..........................................................................................................................24
11 EC DECLARATION OF CONFORMITY.............................................................................................26
12 DISCLAIMER ......................................................................................................................................27

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T. 31 (0) 10 522 43 73
man-tv2500.dc Rev. 1.38UK 0321
Tamson Instruments bv
ISO 9001 : 2015
NL/PRO 238239125
1 SAFETY AND WARNINGS
Make sure before installing or operating the
equipment to read and understand all instructions
and safety precautions listed in this manual. If there
are any questions concerning the operation of the
equipment or about 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 result in a
hazardous situation and may void the manufacturer's
warranty.
Never operate equipment that is not correctly installed.
Unqualified personnel must not operate the equipment.
Avoid damage to the equipment, or its accessories,
caused by incorrect operation.
Important:
When performing service, maintenance or moving the
apparatus, always disconnect the apparatus at the mains
socket,
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 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
and workmanship, preventing the machine from normal
operation. Tamson Instruments b.v does not warranty
that the equipment is fit for any other use than stated in
this manual. The manufacturer can only be held
responsible for the security, reliability and performance of
the equipment, when operated in accordance with the
operating instructions, extensions, adjustments, changes
and/or if repair is performed by Tamson Instruments 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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T. 31 (0) 10 522 43 73
man-tv2500.dc Rev. 1.38UK 0321
Tamson Instruments bv
ISO 9001 : 2015
NL/PRO 238239125
3 PRECAUTIONS AND HAZARDS
Before attempting to operate the bath read all parts
of this manual carefully to insure smooth operation
and avoid damage to the equipment or its
accessories.
If a malfunction occurs, consult section "TROUBLE
SHOOTING" page 22 at the end of this manual.
If problem persists, call your supplier or Tamson
Instruments b.v. Never operate the equipment if not
correctly installed. The equipment must be operated only
by qualified personnel. Avoid damage to the equipment
or its accessories through incorrect operation.
READ
CAREFULLY

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ISO 9001 : 2015
NL/PRO 238239125
4 INSTALLATION
4.1 Important
Tamson Instruments b.v. is not responsible for any
consequential damage or harm caused by using this
bath. Repairs on the electrical system of the bath may
only be carried out by well trained and authorized
persons.
4.2 Unpacking
Before leaving the factory Tamson baths are adequately
packed to prevent damage during normal transportation.
Check the packing for external damage and make a note
on the shipping documents if any damage is found.
Always retain the cartons and packing material until the
bath has been tested and found in good condition.
(Transport companies generally will not honor a claim for
damage if the respective packing material is not available
for examination).
The shipment contains at least the bath as mentioned in
the delivery checklist. Further the consignment might
contain one or more viscometers, individually packed in
small boxes with the calibration certificate included in the
box, as well as ASTM thermometers, thermometer
holders, etc. Please see packing list for details concerning
total contents of consignment.
Before filling the bath remove any remaining packing
material from its interior. The interior of the bath can
be accessed by taking off the lid on the top of the
bath.
REMOVE ALL
PACKAGE MATERIAL

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Tamson Instruments bv
ISO 9001 : 2015
NL/PRO 238239125
4.3 Bath liquid
The bath must be filled with a liquid suitable for the
minimum operating temperature.
It is very important to select a liquid with a viscosity
of 3 mm²/s or less at the operating temperature and a
flash point which is well above the operating
temperature.
The use of other liquids is allowed as long as the viscosity
of the fluid is low enough at the operating temperature.
The viscosity must be approximately 3 mm²/s, but may
definitively not exceed 10 mm²/s. High viscosity will result
in poor stability as well as poor uniformity of the bath.
The fluid flash point must be well above the maximum
operating temperature. Fluid must not be aggressive
when in contact with stainless steel 304, 316, glass or
brass and silicon sealing.
When the bath has been installed it must be filled
with an appropriate liquid. When working with water
the bath should be filled to 1 cm below the lid. For oil
the bath should be filled to not more than 5 cm below
the lid. Depending on the operating temperature the
liquid level in the bath should be observed and
excessive fluid should be removed.
The liquid level should be maintained between one and
three cm below the lid during normal operation.
A lower level than five cm below the lid will damage the
heaters. A high bath level can cause overflow.
We recommend the use of the following liquids for the respective ranges:
Recommended bath fluids
Range
Ordering code
Description
Ambient to
80C/176F
N.A.
Clean tap water, or osmose water
NOT DISTILLED
80..150C /
176..302F
00T0220 (20 litres)
Tamson mineral oil 150. Transparent, 10 mm²/s @ 20°C/68°F; 3
mm²/s @ 100°C/212°F; Flash point 200°C/392°F.
20..150C /
68..302F
08T0001 (gross 20
Kg = 20ltrs)
Silicon oil 200-10, transparent. 10 mm²/st @ 25°C/77°F;3 mm²/s
@ 150°C/301°F. Flash point 211°C/411°F. Lifetime >2 years.
FILLED 1 CM
BELOW THE LID
FILLED 5 CM
BELOW THE LID
H2O
Oil
MAX.
1 CM
MAX.
5 CM
VISCOSITY
3 mm²/s
FLASH POINT
LOWER
OPERATING
TEMPERATURE

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The oil used has a limited lifetime.
The type, brand and operating temperature mainly
determines lifetime. Spilling of sample may also reduce
lifetime, in some cases it can start chemical reactions.
Silicon oil has the tendency to form gel, for this reason
silicon oil has to be replaced as soon as visible changes
are noticed like string forming. Within a few hours silicon
oil can transform itself into solid gel, which is very difficult
to remove. When not totally cleaned, very small pieces of
left over gel will catalyze new oil to form gel again!
Do not use distilled water. This can cause serious
corrosion. Water filtered by reversed osmoses can
be used.
Only use water as a bath fluid below 80°C/176°F.
Working for a longer period with water at
temperatures above 80°C will damage the stirrer
bearings.
When working at temperatures below 10°C / 50°F
ethylene-glycol should be added to the water. For
example in the volume proportion of 50 / 50%.
Using the bath for long periods at low temperatures
will cause condensation on the glass window
resulting in complete invisibility of material placed in
the bath.
CHECK
EXPIRING
DATE
OIL
IF
TEMPERATURE
< 10ºC THEN
ADD
ETHYLENE-
GLYCOL
H
2
O
AFTER LONG
PERIODS OF LOW
TEMPERATURES
VISIBILITY
BECOMES LESS
NO
TEMPERATURE
> 80ºC
H
2
O

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ISO 9001 : 2015
NL/PRO 238239125
When operating at high temperatures the lid (of the
bath), top plate and the window section of the bath
will become very hot. Always use heat protective
gloves. Care must be taken when placing or re-
moving material from the bath.
Hot surface or casing temperature
Bath [°C/°F]
Outher wall* [C/°F]
Top*
[°C/°F]
40/104
32/90
30/86
60/140
46/115
41/106
80/176
55/131
48/118
100/212
76/169
62/144
120/248
93/199
76/169
* measured at 20°C ambient temperature
Pay attention when removing hot fluid:
Use heat protective clothing and wear gloves and
safety glasses.
When changing the bath fluid from water to oil for
operating at temperatures above 80°C, completely
remove all the water from the bath. Small drops of
water may result in hazardous situations while
reheating the bath with oil.
Water and oil must at all times be kept separate within
the bath. Never mix oil and water in or around the bath.
WEAR HEAT
PROTECTIVE GLOVES
WEAR HEAT
PROTECTIVE
CLOTHES
OIL
H
2
O

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ISO 9001 : 2015
NL/PRO 238239125
Do not spill water in hot oil.
Never empty hot oil into a plastic container.
Use proper ventilation
Heated bath fluids can cause toxic fumes.
Remove fumes from hot oil or bath medium. Use
fume cabinet or proper air ventilation
OIL
H
2
O

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Low fluid level
- Can cause fire when heater get's partially
exposed
- Will damage the heater
4.4 Cooling
The bath is provided with an integral cooling coil.
Because of the friction-heat generated by the stirrer
mechanism the bath will heat-up slowly. The lowest
operating temperature at which the bath can be controlled
depends on the fluid used and the ambient temperature.
When operating at temperatures around or below
ambient it is necessary to pass a small amount of tap
water through the cooling coil. Generally the temperature
of the cooling coil water should be 5 °degrees (or more)
below the operating temperature of the bath. To operate
around ambient temperature a flow of 100 to 200 ml per
minute is sufficient.
A cooling circulator can be connected to the cooling coil
providing continuous cooling
4.5 Connecting
Before plugging TV2500 into the mains socket, make
sure the voltage of the bath corresponds to the local
voltage.
Use a mains supply that is well earthed, clean of
interference and suitable for the acquired electrical
load of the bath.
WELL EARTHED
CHECK VOLTAGE
TLC10-3
Small and compact continuous cooling
circulator. Ultra low noise operation.

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5 INTRODUCTION
The TAMSON model TV-baths are designed to perform
a variety of temperature control required for general
laboratory use or as a constant temperature bath.
5.1 General
The heat input is controlled by a microprocessor system.
A special optimized electronic temperature measurement
circuit ensures reproducibility of operation conditions.
The baths have an integrated cooling coil as standard, for
rapidly reducing bath temperature or alternatively for
working at or slightly below ambient temperature.
5.2 Construction
The TAMSON baths are constructed entirely from
corrosion-resistant materials –stainless steel and brass
–entirely. The central microprocessor within the control
module manages and controls the functions for
temperature measuring regulation, program storage,
safety control and error coding.
5.3 Stirrer
A circulation stirrer is built-in for uniform temperature
distribution within the bath.
5.4 Temperature control and setting
The bath temperature is regulated using a PT-100
temperature probe connected to a microprocessor
module. The advanced electronic control system
continually computes the energy input required for
optimal temperature accuracy and stability. The controller
will activate the heaters partially or in full, taking into
account the difference between actual bath temperature
and set point taking into account the type of bath fluid
used and working conditions. This process
does not interfere electrically with other equipment since
all heating elements are switched in zero-cross mode.
Through the application of an especially developed inlet
circuit for the temperature probe, the sensitivity to
external interference has been reduced to a minimum.
The required temperature is set by means of membrane
switches on the front panel. An absolute temperature
offset is provided with a resolution of 0.01°C. This fine-
tuning can be carried out at any time during operation of
the bath.

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ISO 9001 : 2015
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6 Safety features
6.1 Safety window
When working at higher temperatures it is advised to use
the safety window. This is an optional accessorie which
protects the bath window. The hardened glass prevents
touching of a possible hot see trough window. It also
offers a second barrier for the hot bath fluid.
6.2 Overtemperature safety
In case of electronic failure the possibility exists that the
heater element is continuously switched on. This will
cause the temperature raise. To prevent high
temperatures the bath is fitted with a mechanical over-
temperature protection thermostat. This thermostat will
switch-off the bath at a pre set temperature in the range
from 50 to 270C.
We advise to adjust the mechanical over temperature to
approximately + 25C above the bath set point.
This safety construction prevents for example oil to be
heated above flash point which will cause fire or prevent
evaporation of bath fluid due to high temperatures.
The thermostat will automatically reset when the bath
temperature drops approximately 10°C below the pre-set
temperature. To continue normal operation the bath has
to be switched off and on again.
6.3 Spill tray
The spill tray protects your lab against dripping and
spilling during operation or when replacing bath fluid. The
tray has a drainage with valve and 3/8" BSP connection
6.4 Level Protect
The bath has a built in a level detection system. On the
frontpanel there is a LED [4] which will blink when the
level is too low.
This protection might cause problems when using liquids
which expand at high temperature like mineral- or silicon
oil. When fluid is cold, level will be low and the system
might indicat a low level abuisively.
02T0200 Spill tray
02T0210 Safety window as accessory
02T0210 Safety window mounted (front
and back)

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7 OPERATING THE SYSTEM
When the bath is ready for use it can be switched on by
pressing the mains switch. Because the bath is equipped
with an automatic calibration facility, the microprocessor
controller first calibrates the analogous part of the
controller. The display of the bath will indicate the text
”calibrating bath”.
When switching off the apparatus, wait for 10
seconds before switching the system back on again.
The electronics are suited for both 50 and 60 Hz.
7.1 Backside
Backside apparatus
1
Cooling sleeves
2
Power cord
3
RS232 Communication port, SUB - D 9
pole female
4
Inlet - outlet cooling coil (in- and outlet can
be exchanged), outher diameter 8 mm
stainless steel tube
5
Motor protection fuse.
7.2 Front panel layout
To adjust the overtemperature safety turn the thermostat
clockwise (7, drawing 1) to its maximum. Be aware that
the safety thermostat is now only functioning at 270 °C.
Heat the bath to the appropriate set point. Gently turn the
thermostat anti-clockwise, until the over-temperature
protection is activated, and system switches-off. Now
Turn the thermostat approximately 30...40higher
(clockwise). Switch the bath off and on again. The bath is
ready to operate safely.
Front panel layout
1
LC Display
2
Heater indicator (Green)
3
Over temperature indicator (Red)
4
Level indicators (Blue)
6
Offset (Yellow)
Up(a), down(b), enter(c) buttons
7
Over-temperature protections
8
Mains switch
Front panel keys
1
2
3
4
5
6c
6b
6a
7
8
2
1
4
3
5
1 X

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The front panel layout shows the following three
operating keys:
The “Page” key offers following:
Temperature readout in °C,
Temperature set point in °C,
Changing the tuning (PID) parameters,
The “Up and Down” keys allow changing the listed value.
All changed values like set point and PID parameters will
be kept in memory even after switching of the power
supply.
If the fluid level becomes too low and the heating
elements cannot fully dissipate their power, these
elements may reach a temperature above the ignition
point. It is possible that the bath liquid ignites under these
conditions.
In most cases however the bath will still be switched off
before this point, as the overtemperature safety will be
activated.
The front panel layout shows the following three
operating keys:
- Set point
- Offset**(press: <-5.00 .. +5.00°C step 0.01°C)
- Max Power (press: low, med, hi, max)
- Boost heater (press on / off)
- Time const (press: fast, medium slow, precise)
- Stirrer *
- Low alarm *
- High alarm *
- PID parameter:
(PID set 1, PID set 2. PID set 3, PID set 4)
Proportional band (Pb=1/P where P is
proportional value)
Integral value
Differential value
- Backlight
- Temp units
- Baudrate
* optional
** This value is added to the measured
temperature by the microcontroller. This way the
temperature readout can be synchronized with
an external calibrated measuring device like the
E20 thermometer.
Page
Down
Up
The Tamson “E20” thermometer can be used
as an external calibrated temperature read
out.
Front panel
PAGE
DOWN
UP

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ISO 9001 : 2015
NL/PRO 238239125
note: Display switches back automatically to
temperature readout. Changed values are
stored. Or press to confirm when settings are
altered.
Each time is pressed another option is
displayed.
Up and Down keys allow changing the listed value. All
changed values, like set point and PID parameters, will
be kept in memory when pressing the page key to leave
the menu. After switching-off the power supply, changed
values are kept in memory.
7.3 Display readout
1 Temperature readout
2 Applied percentage of power
3 Operating mode
4 Indicator, alarm high, alarm low, control stable
Ad 1: When the controller starts or is restarted, the
displayed value increases to a stable readout
appears after a few seconds.
Ad 2: The controller calculates every second the amount
of power which should be applied for stable control.
The value is displayed with a resolution of 0.1%
and ranges from 0% to 99.9%.
Ad 3: Boost Bath is heating to set point
Cooling Bath is cooling down to set point
Tuning Ratio Bath is tuning for power needed
Tuning SA Bath is tuning, second step
PID SP=25.00 Bath is controlling, set point is
25.00°C (example)
Ad 4:
- Bath control is stable
- Alarm high, press button to reset
- Alarm low, press button to reset
3
4
2
1

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7.4 Quick start, adjust set point
To quickly start the bath:
Fill the bath with sufficient fluid to flood the heaters and
cooling coil, however do not fill the bath fully to the
maximum.
Place the power plug, switch the bath on using the mains
switch.
Choose a working temperature (set point):
Press once. Display will indicate "set point".
Alter set point temperature by using up and down
key to select the desired bath temperature. Press
to confirm and display bath temperature again.
7.5 Tuning
Tuning can be done manually. The parameters
mentioned in table 1 (on the next page) will influence the
control of the bath.
The PID parameters are set to
P
I
D
25
16
0
These parameters work fine for following bath contents:
- Water
- Water / Glycol
- Silicone oil, < 10cSt @ 25°C
- Mineral oil, < 10cSt @ 25°C
The temperature control of the bath is based on a digital
PID system. When using different fluids in the bath each
with their own heat capacity, the use of external cooling,
or working at different set point temperatures requires
new settings of the PID parameters. These parameters
have to be optimized after changes to the system when
optimal and accurate temperature control of the bath
liquid 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.

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Parameter
Description
Display
Proportional band
The bandwidth in display-units over which the output power is
proportional between minimum and maximum
Pb
Integration time
Determines the time taken by the controller to remove steady state error
signals
Ti
Derivative time
Determines the time taken by the controller to react on error signals.
Td
Table 1 Parameters influencing the temperature control
7.6 Manual tuning
The parameters for the PID control can also be changed
manually. The control also allows to set the I and D
values to zero. The bath will then function as a
proportional system. The “P” parameter can than be
varied to an optimal value by trial and error. A higher P
will stabilize the system when I and D are off. The PID
parameters can also be determined with the use of the
Ziegler Nichols method described below.
Manual tuning by Ziegler-Nichols
With the process at its normal running temperature:
Set the integral time “Ti” and the derivative Time “Td” to
off
Ignore the fact that the temperature may not settle
precisely at the set point
If the temperature is stable, reduce the proportional band
Pb so that the temperature just starts to oscillate. If the
temperature is already oscillating, increase the
proportional band until it begins oscillating. Allow enough
time between each adjustment for the loop to stabilize.
Make a note of the proportional band value “B” and the
period of oscillation “T” Set the Pb, Ti and Td parameter
values according to the calculations given in the table
below
Type of control
Proportional band
Integral time "ti"
Derivative Time "td"
Proportional only
2xB
Off
Off
P + I control
2,2xB
0,8xT
Off
P + I + D control
1,7xB
0,5xT
0,12xT

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E-mail: [email protected]
Website: www.tamson.com
Van ’t Hoffstraat 12
2665 JL Bleiswijk, The Netherlands
T. 31 (0) 10 522 43 73
man-tv2500.dc Rev. 1.38UK 0321
Tamson Instruments bv
ISO 9001 : 2015
NL/PRO 238239125
8 Technical specifications
8.1 Using water as a bath fluid
8.1.1 General results

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E-mail: [email protected]
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Van ’t Hoffstraat 12
2665 JL Bleiswijk, The Netherlands
T. 31 (0) 10 522 43 73
man-tv2500.dc Rev. 1.38UK 0321
Tamson Instruments bv
ISO 9001 : 2015
NL/PRO 238239125
8.1.2 Stability using water as bath a fluid
Δ0.032˚C
±0.016°C
Δ0.033˚C
±0.015°C
Δ0.024˚C
±0.012°C
Δ0.018˚C
±0.009°C

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E-mail: [email protected]
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Van ’t Hoffstraat 12
2665 JL Bleiswijk, The Netherlands
T. 31 (0) 10 522 43 73
man-tv2500.dc Rev. 1.38UK 0321
Tamson Instruments bv
ISO 9001 : 2015
NL/PRO 238239125
8.2 Using mineral oil as a bath fluid
Using mineral oil with viscosity of 10 mm²/s @ 20°C as a bath fluid
8.2.1 General results
Fluctuation when ambient varying from 18.0.. 20.0 (Δ2.0°C)
8.2.2 Temperature stability using mineral oil as a bath fluid
Δ0.040˚C
±0.020°C
Δ0.055˚C
±0.028°C
Δ0.027˚C
±0.014°C