PMT TV4000LT User manual

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Tamson Instruments bv
Rev. 2.1 UK 0517
Manual
TV4000LT
TV7000LT

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2665 JL Bleiswijk, The Netherlands
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E-mail: [e-mail]
Website: www.tamson.com
VAT: NL 80 66 34 984 B01
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IBAN Code: NL95 RABO 0160100046
Tamson Instruments bv
Rev. 2.1 UK 0517
1SAFETY AND WARNINGS ......................................................................................................................4
2WARRANTY .............................................................................................................................................4
3PRECAUTIONS AND HAZARDS ............................................................................................................5
4INSTALLATION........................................................................................................................................6
4.1 IMPORTANT ..........................................................................................................................................................6
4.2 TILTING................................................................................................................................................................6
4.3 UNPACKING..........................................................................................................................................................6
4.4 PLACEMENT AND VENTILATION................................................................................................................................7
4.5 INITIAL USE...........................................................................................................................................................8
4.6 BATH LIQUIDS.......................................................................................................................................................9
4.7 BATH FLUID LEVEL...............................................................................................................................................10
4.7.1 Minimum level................................................................................................................................................................ 10
4.7.2 Maximum level............................................................................................................................................................... 11
4.8 CONNECTING .....................................................................................................................................................12
5INTRODUCTION.....................................................................................................................................13
5.1 GENERAL...........................................................................................................................................................13
5.2 CONSTRUCTION..................................................................................................................................................13
5.3 CIRCULATOR ......................................................................................................................................................13
5.4 TEMPERATURE CONTROL AND SETTING .................................................................................................................13
5.5 FRONT PANEL LAYOUT.........................................................................................................................................14
5.6 BACKSIDE APPARATUS ........................................................................................................................................14
6OPERATING THE BATH........................................................................................................................15
6.1 OVERVIEW MENU ITEMS.......................................................................................................................................15
6.2 SAFETY THERMOSTAT .........................................................................................................................................15
6.3 DISPLAY ............................................................................................................................................................15
6.4 WINDOW HEATING...............................................................................................................................................16
6.5 QUICKSTART.................................................................................................................................................16
7MENU ITEMS..........................................................................................................................................17
7.1.1 Menu item "Set point".................................................................................................................................................... 17
7.1.2 Menu item "Offset".........................................................................................................................................................17
7.1.3 Menu item "Max Power"................................................................................................................................................. 18
7.1.4 Menu item "Boost heater".............................................................................................................................................. 18
7.1.5 Menu item "Time const".................................................................................................................................................18
7.1.6 Menu item "Stirrer" (optional)......................................................................................................................................... 18
7.1.7 Menu item "Low alarm" (optional) .................................................................................................................................. 18
7.1.8 Menu item "High alarm" (optional)................................................................................................................................. 18
7.1.9 Menu item "PID parameter"...........................................................................................................................................18
7.1.10 Menu item "Backlight" ...............................................................................................................................................19
7.1.11 Menu item "Temp units" ............................................................................................................................................19
7.1.12 Menu item "Baudrate" ...............................................................................................................................................19
7.1.13 Menu item "Restart" .................................................................................................................................................. 19
7.2 PID CONFIGURATION...........................................................................................................................................20
7.3 MANUAL TUNING .................................................................................................................................................21
8MAINTENANCE......................................................................................................................................22
8.1 DRAIN BATH LIQUID .............................................................................................................................................22
8.2 CLEANING..........................................................................................................................................................23
9TROUBLE SHOOTING...........................................................................................................................24
9.1 THE MOTOR,COMPRESSOR AND LAMPS ARE DEAD..................................................................................................24
9.2 MOTOR IS NOT RUNNING,LAMPS AND ELECTRONICS OPERATE (THE MOTOR TURNS FREELY BY HAND)...........................24
9.3 COMPRESSOR MAKES “CLICKING”NOISE................................................................................................................24
9.4 COMPRESSOR WILL NOT START ............................................................................................................................24
9.5 TEMPERATURE NOT STABLE .................................................................................................................................25
9.6 BATH TEMPERATURE DOES NOT DROP...................................................................................................................26
9.7 FAULTY TEMPERATURE READING /TEMPERATURE OFFSET .......................................................................................26

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Tamson Instruments bv
Rev. 2.1 UK 0517
9.8 CONDENSATE BUILDING UP ON WINDOW ................................................................................................................26
9.9 UNIT IS LEAKING WATER.......................................................................................................................................26
9.10 IT TAKES LONG TO REACH THE NEW BATH TEMPERATURE.........................................................................................27
9.11 BATH TEMPERATURE DOESN'T EQUAL SET POINT TEMPERATURE...............................................................................27
10 TECHNICAL SPECIFICATIONS ........................................................................................................28
11 PERFORMANCE TV4000LT ..............................................................................................................29
11.1 COOLDOWN .......................................................................................................................................................29
11.2 RECOVERY TEMPERATURE DISTURBANCE ..............................................................................................................30
11.3 STABILITY AT 29°C ............................................................................................................................................31
11.4 STABILITY AT +20°C ..........................................................................................................................................31
11.5 STABILITY AT 0°C ..............................................................................................................................................32
11.6 STABILITY AT -10°C...........................................................................................................................................32
11.7 STABILITY AT -20°C...........................................................................................................................................33
11.8 STABILITY AT -30°C...........................................................................................................................................33
11.9 STABILITY AT -40°C...........................................................................................................................................34
12 STABILITY TESTS TV7000LT ...........................................................................................................35
12.1 COOL DOWN.......................................................................................................................................................35
12.2 STABILITY AT 0°C ..............................................................................................................................................35
12.3 STABILITY AT -10°C............................................................................................................................................36
12.4 STABILITY AT -20°...............................................................................................................................................36
12.5 STABILITY AT -30°...............................................................................................................................................37
12.6 STABILITY AT -40°C............................................................................................................................................37
12.7 SETTLING TIME (AT -10°C)...................................................................................................................................38
12.8 SETTLING TIME (AT -30°C)...................................................................................................................................38
13 RS 232 C INTERFACE .......................................................................................................................39
13.1 GENERAL SETTINGS ............................................................................................................................................39
13.2 COMMANDS OVERVIEW........................................................................................................................................39
13.3 RS 232 CABLE...................................................................................................................................................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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Tamson Instruments bv
Rev. 2.1 UK 0517
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 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
and workmanship preventing the machine from normal
operation. Tamson Instruments bv 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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Tamson Instruments bv
Rev. 2.1 UK 0517
3 PRECAUTIONS AND HAZARDS
Before attempting to operate the bath read all parts
of this manual carefully to ensure proper operation
and avoid damage to the equipment or its
accessories.
If a malfunction occurs consult the section trouble
shooting found on page 24 of this manual. If the 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.
Use temperature and chemical resistant protection
material when operating the bath.
Preventing overflow. Use chemical and temperature
resistant materials.
Prevent dangerous fumes or vapour and use
appropriate ventilation. Methanol vapour can cause
explosion hazard.
Do not move apparatus when filled.
Do not place apparatus and waste container in
walking area when operating.
Use appropriate bath liquid.

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Tamson Instruments bv
Rev. 2.1 UK 0517
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 Tilting
Before unpacking inspect the tilt watch located on the
outside of the packing. When the tilt watch indicates a
red color contact Tamson instruments and the forwarder
before continuing with unpacking.
4.3 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 packaging 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 which should be
individually packed in small boxes with the calibration
certificate included in the box, as well as ASTM
thermometers, thermometer holders, etc. Please see the
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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4.4 Placement and ventilation
Air circulation has to be enabled by 10 cm of free
space at both sides and 15 to 20 cm at the rear of
the bath.
The bath has to be placed in a well ventilated area.
10 CM
10 CM
20 CM
AIR FLOW

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Airflow
Air must pass the apparatus freely. The air transports
the heat from inside the apparatus to the environment.
When airflow is blocked the apparatus will not perform
to its specifications and it may harm the equipment or
even cause mechanical damage.
Dust
Do not place the bath in a dusty environment. Dust will
block the condenser unit inside the apparatus which will
lead to severe mechanical damage.
Regularly check the apparatus and condenser unit
for dust. Remove dust with a vacuum cleaner. Do
NOT remove dust with compressed air.
Leaking
Inside the bath the cold parts condensate and ice can
be build. When the apparatus is switched-off this melt
water may leak onto the floor. Do not place the
apparatus on a floor which can be damaged by this melt
water. The amount of water is limited to a few mL/hr.
4.5 Initial use
Due to transportation allow the bath a 24 hour
period for stabilization. This applies also when the
apparatus has been tilted or fallen.
Do not switch on power, because lubrication-oil inside
the compressor system has to run into the capillary.
It will take several hours before the oil has flown back
into the compressor unit. When the apparatus is
immediately turned on after it has been tilted, severe
damage may occur to the compressor unit due to
insufficient lubrication.
AIR FLOW

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Tamson Instruments bv
Rev. 2.1 UK 0517
4.6 Bath liquids
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
preferably less (e.g. 3 mm²/s) at the operating
temperature and a flash point which is well above
the operating temperature.
The best bath liquid to be used is methanol,
enabling circulation at very low temperatures.
Methanol is extremely flammable and can cause fire
hazard. Take all necessary precautions to reduce fire
hazard.
When using methanol all vapors must be removed by
using appropriate air ventilation.
Methanol is toxic and can cause health risks. Use
appropriate ventilation and other precautions to prevent
inhaling toxic vapors. If ventilation is insufficient the risk
of explosion hazards can occur!
The supplier of the bath liquid (methanol) will be able to
hand over all chemical details and safety precautions
related to the use of methanol. These precautions must
be followed when operating the bath.
VISCOSITY
< 10 mm²/s
FLASH POINT
> OPERATING
TEMP.
METHANOL

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Extreme HAZARD
Do not use methanol at temperatures above 20°C.
The methanol will vaporise and cause toxic and
flammable vapours. Explosion hazard can build up
in or around the bath
When working at temperatures above 20°C, oil or
water can be used as an alternative.
Water, water-glycol, mineral or silicone oil also are
liquids applicable to use in this bath.
Do not use distilled water. Distilled water can cause
corrosion to the stainless steel inner bath and its
parts. Filtered water from reversed osmoses
apparatus 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 non
homogeneousness 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 +10ºC
use water
glycol or
methanol
Methanol:
Do not
operate >
20ºC

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Tamson Instruments bv
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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 the
bath is filled at these low temperatures up to its
maximum level the bath will overflow when heating
up.
If the fluid level is too high, it will leave the bath via the
overflow outlet (10mm outer diameter pipe) placed on
top on the left hand side of the bath. When a hose is
connected to this overflow drain, the expanded
methanol can flow back into the connected waste
container 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 temperature
resistant materials,
- Prevent fumes from escaping,
- Do not place the container in the walking area but
storage space next to the apparatus.
Check container:
- chemical resistant
- Withstand fluid
temperature
Max. level:
1 cm below
top lid
PREVENT
OVERFLOW

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!
?
When operating at high temperatures the lid (of the
bath), top plate and the window section of the bath
become 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 and
safety glasses.
4.8 Connecting
Before plugging TV bath into mains socket, make sure
the voltage of the bath corresponds to the local voltage
and frequency.
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
WEAR PROTECTIVE
GLOVES , CLOTHING
AND EYE
PROTECTION.
WEAR HEAT
PROTECTIVE
GLOVES

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Rev. 2.1 UK 0517
5 INTRODUCTION
5.1 General
The TV4000LT and TV7000LT apparatus basically
consists of a combination of a cooling system and
microprocessor controlled heating element. The design
ensures a high degree of accuracy and reproducibility of
temperature control.
5.2 Construction
The TAMSON baths are constructed entirely from
corrosion-resistant materials such as stainless steel and
brass. The bath is effectively insulated against heat loss
by a layer of Armaflex® rubber between the inner tank
and outer casing and the use of two multilayer thermo-
pane windows.
5.3 Circulator
The stirrer is built-in to guarantee an uniform
temperature distribution within the bath (see “Technical
specifications” page 28)
5.4 Temperature control and setting
The bath temperature is regulated using a PT-100
temperature probe Class A connected to a
microprocessor module. The advanced electronic
control system continually computes the energy input
required 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 relative
accuracy of 0.001°C. For further details about accuracy
and range see "Technical specifications" page 28.
The heat removal (cooling) is automatically selected
from the set-point temperature setting.
The set-point temperature in the selected range than
can be set on the controller with it’s blue front, see
“Menu item "Setpoint"” page 17.
To obtain an energy friendly control of the temperature
the cooling has been split in four stages:
1 Heating only, no cooling,
2 Energy saving cooling capacity (compressor
running, TEV used to cool down, Capillary used
when tuning and controlling),
3 Full cooling capacity (compressor running and
TEV - long),
As the set point temperature is controlled by heating
against the heat removal, it is obvious that by limiting
the cooling capacity this way of control is more energy
friendly than conventional systems. If full heat removal
capacity is used at 0°C over 2 kW (TV4000LT, 3 kW
TV7000LT) of heating should be applied, instead of the
current 300 Watt.
COVER
BATH
WINDOW
Automatic selection of heat removal
ON/OFF SWITCH
MENU SELECT
DISPLAY
DRAIN
WINDOW
HEATING
OVERFLOW
VISCOMETER
HOLDERS
1
2
3
-40°C
-30°C
0°C
+40°C
+80°C
+15°C

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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 parameters
2
LED (red)
Over temperature indicator
3
LED (blue)
Level indicator
4
LED (yellow)
Error
5
LED (green)
Heater indicator
6
Switch
Mains switch
7
Button
Turn-push button
4
1
5
3
2
6
7
1: Motor fuse
2: 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 by
pressing the mains switch. The bath will initialise and
calibrate itself.
6.1 Overview menu items
Setpoint
- Offset (press: <-5.00 .. +5.00°C resolution 0.01°C)
- Max Power (press: low 25, 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
differential
- Backlight
- Temp units
- Baudrate
- Restart
6.2 Safety thermostat
When the bath temperature becomes higher than the
set point temperature of the safety thermostat. The
heating electronics and controller are switched-off. The
red LED on the display will light. When the temperature
of the bath has been lowered with approximately 20°K,
the thermostat re-sets itself automatically, however to
continue normal operation the bath has to be switched
off and on again.
When switching off wait 5 seconds before switching
on again.
6.3 Display
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%.
1
2
3
4

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Ad 3: Boost Bath is heating to set point
using boost heater
Heating Bath is heating to set point,
boost heater is off
Cooling Bath is cooling down to set
point
Tuning Ratio Bath is tuning for power needed
at set point, first step
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
6.4 Window heating
The TV4000LT and TV7000LT have heated windows to
prevent build up of condensate. The heating is
thermostat driven and kept around 50-49°C. If heating is
off and the inner bath cooled down, the outside window
also will drop in temperature forming a cold surface.
This surface quickly will be covered with condensate
blocking the visibility.
Window heating can be switched on or off separately
from the TV-LT system. When the window heating is on,
the green lamp of the switch will light.
6.5 QUICK START
To start operating the bath in a quick way do the
following:
Fill the bath with liquid as indicated, place the power
plug, connect to mains socket, switch-on the bath, using
the mains switch, select appropriate set point.
PID settings
All measuring results have been acquired using
following PID settings:
Pb := 25
I := 16
D := 0
Under different settings its possible to achieve even
better values by trimming the PID settings.

Page 17/44
Van ’t Hoffstraat 12
2665 JL Bleiswijk, The Netherlands
T. 31 (0) 10 522 43 73
F. 31 (0) 10 521 19 41
E-mail: [e-mail]
Website: www.tamson.com
VAT: NL 80 66 34 984 B01
Bank account no.: Rabobank 16 01 00 046
Chamber of commerce 27 16 95 41
IBAN Code: NL95 RABO 0160100046
Tamson Instruments bv
Rev. 2.1 UK 0517
7 Menu items
Use the turn-push button to select a menu item and
select the item by pressing the button. After pressing a
sign appears next to the value indicating the value can
now be changed. Pressing the button again activates
the value immediately. When the value is altered but the
button is not pressed the value will be accepted and
stored after 5 seconds automatically. The menu returns
back to normal operating mode.
7.1.1 Menu item "Set point"
Select the set point temperature. Resolution is 0.01°C +/-
the system accuracy.
There bath can be cooled down more rapidly by entering
the minimum set point of -40°C. Both compressors are
than switched-on and the systems cools down fastest.
When the bath has reached a temperature just below the
desired SP, set the new SP. For example if the bath is
running at 40°C and the operator wants to lower the
temperature to 5°C. Set the SP to -40°C. When the unit
has reached 4°C set the new SP to 5°C. The unit will than
heat and get stabilised around 5°C.
Care must be taken when using water as bath fluid as
there is a risk of freezing.
The reason for following this procedure is technical and is
caused by the way the cooling capacity is adapted over
the temperature span of the bath.
If the unit does not get stable, please have a look at the
PID parameters. These settings are explained in the
manual. Standard values are 25, 16 0. If the unit
fluctuates too much try to increase the P to 50 or 100 and
the I to 50.
To get stable temperature control with small variations is a
secure 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 0.01°C.
The offset will synchronise the bath temperature readout
with 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 and
depends on the applied power percentage. When the
power percentage is below 15% the P value must be
lower than 25, i.e. 10.

Page 18/44
Van ’t Hoffstraat 12
2665 JL Bleiswijk, The Netherlands
T. 31 (0) 10 522 43 73
F. 31 (0) 10 521 19 41
E-mail: [e-mail]
Website: www.tamson.com
VAT: NL 80 66 34 984 B01
Bank account no.: Rabobank 16 01 00 046
Chamber of commerce 27 16 95 41
IBAN Code: NL95 RABO 0160100046
Tamson Instruments bv
Rev. 2.1 UK 0517
7.1.3 Menu item "Max Power"
(press: low, med, hi, max)
Limits the applied power by a maximum value:
Low Maximum of 25% applied
Medium Maximum of 50% applied
High Maximum of 75% applied
Maximum 100% power is applied
Limiting the power can be used to lower overshoot
temperature..
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 boost heater.
Standard value: On
7.1.5 Menu item "Time const"
Used to select time to tune. The option precise has to be
used to reach maximum temperature accuracy. Options
are:
- Fast 60 seconds
- Medium 120 seconds
- Slow 180 seconds
- Precise 240 seconds
Standard 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 0.1°C.
No hardware connected, display function only.
7.1.8 Menu item "High alarm" (optional)
Optional: min SP to max SP. resolution 0.1°C.
No hardware connected, display function only.
7.1.9 Menu item "PID parameter"
PID set 1 -
PID set 2 - deactivated
PID set 3 - deactivated
PID set 4 - Activated when communication
via RS232
Each set offers individual PID settings for:
Proportional band value
Integrating value
Differentiating value
Default settings
Pb* := 25
I := 16
D := 0
*Pb= proportional band. Proportional value P is found to be 100/Pb.

Page 19/44
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2665 JL Bleiswijk, The Netherlands
T. 31 (0) 10 522 43 73
F. 31 (0) 10 521 19 41
E-mail: [e-mail]
Website: www.tamson.com
VAT: NL 80 66 34 984 B01
Bank account no.: Rabobank 16 01 00 046
Chamber of commerce 27 16 95 41
IBAN Code: NL95 RABO 0160100046
Tamson Instruments bv
Rev. 2.1 UK 0517
If there remains an offset in the temperature readout try to
increase the I to 25 or 50. The offset is due to the PID
setting and depends on the applied power percentage. An
offset of 0.1°C can be adjusted with the offset value
available in the menu or when increasing the PID
integrator value to 25 or 50.
7.1.10 Menu item "Backlight"
On
Off
Standard value: On
7.1.11 Menu item "Temp units"
°C
°F
Standard value: °C
7.1.12 Menu item "Baudrate"
300
600
1200
2400
4800
9600
19200
38400
Standard value: 9600
7.1.13 Menu item "Restart"
Restarts system and activates tuning

Page 20/44
Van ’t Hoffstraat 12
2665 JL Bleiswijk, The Netherlands
T. 31 (0) 10 522 43 73
F. 31 (0) 10 521 19 41
E-mail: [e-mail]
Website: www.tamson.com
VAT: NL 80 66 34 984 B01
Bank account no.: Rabobank 16 01 00 046
Chamber of commerce 27 16 95 41
IBAN Code: NL95 RABO 0160100046
Tamson Instruments bv
Rev. 2.1 UK 0517
7.2 PID configuration
The two graphs below show the influence of the integral
setting. The graph on top has a setting of 200 for the
integral parameter. The bottom graph has a setting of 16.
The value of 200 causes less stable control.
I = 16
I = 200