Isotech ITL-M-18233 Operating instructions

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WTPMB Model 18233: 07–12/16
WATER TRIPLE POINT
MAINTENANCE BATH
MODEL ITL-M-18233
User Maintenance Manual/Handbook
Isothermal Technology Limited, Pine Grove, Southport, PR9 9AG, England
Tel: [phone] Fax: [phone] Internet: www.isotech.co.uk E-mail: [e-mail]
The company is always willing to give technical advice and assistance where appropriate. Equally, because of the programme of
continual development and improvement we reserve the right to amend or alter characteristics and design without prior notice.
This publication is for information only.

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WTPMB Model 18233: 07–12/16
CONTENTS
EMC INFORMATION ........................................................................................................................................................ 4
ELECTRICAL SAFETY ........................................................................................................................................................ 5
Environmental Ratings................................................................................................................................................................. 5
HEALTH AND SAFETY INSTRUCTIONS .......................................................................................................................... 6
GUARANTEE ............................................................................................................................................................................. 7
CAUTIONARY NOTE ....................................................................................................................................................... 8
GENERAL INFORMATION ........................................................................................................................................................ 9
SYSTEM DESCRIPTION ................................................................................................................................................................. 9
SPECIFICATIONS........................................................................................................................................................................... 9
OPERATING INSTRUCTIONS................................................................................................................................................. 10
INSTALLATION ........................................................................................................................................................................... 10
Location .................................................................................................................................................................................... 10
General Layout.......................................................................................................................................................................... 10
Start Up..................................................................................................................................................................................... 12
OPERATION ................................................................................................................................................................................ 12
USING THE CONTROLLER..................................................................................................................................................... 13
THE ISOTECH SPLASH SCREEN AND CONTROLS.................................................................................................................. 14
HOW TO LOG IN AS THE SUPERVISOR .................................................................................................................................... 15
HOW TO LOG IN AS THE ENGINEER........................................................................................................................................ 15
CHANGING THE SET POINT ..................................................................................................................................................... 16
To change the setpoint of the equipment ................................................................................................................................. 16
How to change from °C to °F or Kelvin................................................................................................................................... 16
HOW TO USE THE ALARMS AND ADDITIONAL SAFETY FEATURES OF THE CONTROLLER ............................................ 17
Control sensor alarms:.............................................................................................................................................................. 17
Left and Right side alarms for under temperature protection: ................................................................................................. 17
In the event of an alarm condition: ........................................................................................................................................... 17
What happens next: .................................................................................................................................................................. 17
How to apply a fixed offset to the control sensor to compensate for temperature errors:..................................................... 18
If the bath becomes unstable: ................................................................................................................................................... 18
Ambient temperature indicator: ............................................................................................................................................... 18
HOW TO CHANGE THE DATE AND TIME OR THE LANGUAGE OF THE EQUIPMENT:..................................................... 18
TO CHANGE THE DATE AND TIME OR LANGUAGE: ............................................................................................................. 18
THE NETWORK INTERFACE:..................................................................................................................................................... 19
TO ACCESS THE NETWORK INTERFACE:................................................................................................................................ 19
DATA LOGGING: ........................................................................................................................................................................ 19
FTP SERVER ARCHIVING:............................................................................................................................................................ 20
MAINTENANCE ...................................................................................................................................................................... 21
ROUTINE MAINTENANCE......................................................................................................................................................... 21
CALIBRATION ............................................................................................................................................................................. 21
THEORY OF OPERATION....................................................................................................................................................... 22
REFRIGERATION ......................................................................................................................................................................... 22
REPAIR PROCEDURES................................................................................................................................................................. 22
CONTROLLER REMOVAL........................................................................................................................................................... 22
AIR PUMP REPLACEMENT.......................................................................................................................................................... 23
LINE VOLTAGE CONVERSION .................................................................................................................................................. 23
TANK ASSEMBLY REMOVAL....................................................................................................................................................... 23

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WTPMB Model 18233: 07–12/16
THERMAL FUSE REPLACEMENT................................................................................................................................................ 24
FAN REPLACEMENT ................................................................................................................................................................... 24
Refrigeration Diagram ............................................................................................................................................................... 25
APPENDIX A: AN INTRODUCTION TO THE WATER TRIPLE POINT .................................................................................. 26
APPENDIX B: TRIPLE POINT CELL OPERATION................................................................................................................... 28
ISOTECH I-CAL EASY.............................................................................................................................................................. 31
PROGRAM EDITOR ................................................................................................................................................................. 32

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WTPMB Model 18233: 07–12/16
EMC INFORMATION
This product meets the requirements of the European Directive on Electromagnetic Compatibility (EMC)
89/336/EEC as amended by EC Directive 92/31/EEC and the European Low Voltage Directive 73/25/EEC, amended
by 93/68/EEC. To ensure emission compliance please ensure that any serial communications connecting leads are
fully screened.
The product meets the susceptibility requirements of EN 50082-1, criterion B.
Symbol Identification
Publication
Description
ISO3864
Caution (refer to manual)
IEC 417
Caution, Hot Surface

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WTPMB Model 18233: 07–12/16
ELECTRICAL SAFETY
This equipment must be correctly earthed.
This equipment is a Class 1 Appliance. A protective earth is used to ensure the conductive parts cannot become live
in the event of a failure of the insulation.
The protective conductor of the flexible mains cable which is coloured green/yellow MUST be connected to a suitable
earth.
The blue conductor should be connected to Neutral and the Brown conductor to Live (Line).
Warning: Internal mains voltage hazard. Do not remove the panels.
There are no user serviceable parts inside. Contact your nearest Isotech agent for repair.
Voltage transients on the supply must not exceed 2.5kV.
Conductive pollution e.g. Carbon dust, must be excluded from the apparatus. EN61010 pollution degrees 2
Environmental Ratings
Operating Temperature 5-50°C
Relative Humidity 5-95%, non condensing

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WTPMB Model 18233: 07–12/16
HEALTH AND SAFETY INSTRUCTIONS
1. Read this entire manual before use.
2. Wear appropriate protective clothing.
3. Operators of this equipment should be adequately trained in the handling of hot and cold items and liquids.
4. Do not use the apparatus for jobs other than those for which it was designed, i.e. the calibration of
thermometers.
5. Do not handle the apparatus when it is hot (or cold), unless wearing the appropriate protective clothing and
having the necessary training.
6. Do not drill, modify or otherwise change the shape of the apparatus.
7. Do not dismantle the apparatus.
8. Do not use the apparatus outside its recommended temperature range.
9. If cased, do not return the apparatus to its carrying case until the unit has cooled.
10. There are no user serviceable parts inside. Contact your nearest Isotech agent for repair.
11. Ensure materials, especially flammable materials are kept away from hot parts of the apparatus, to prevent
fire risk.
12. Ensure adequate ventilation when using oils at high temperatures.

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WTPMB Model 18233: 07–12/16
GUARANTEE
ⓒIsothermal Technology Limited
This instrument has been manufactured to exacting standards and is guaranteed for twelve months against electrical
break-down or mechanical failure caused through defective material or workmanship, provided the failure is not the
result of misuse.
In the event of failure covered by this guarantee, the instrument must be returned, carriage paid, to the supplier for
examination and will be replaced or repaired at our option.
FRAGILE CERAMIC AND/OR GLASS PARTS ARE NOT COVERED BY THIS GUARANTEE INTERFERENCE WITH
OR FAILURE TO PROPERLY MAINTAIN THIS INSTRUMENT MAY INVALIDATE THIS GUARANTEE
The company is always willing to give technical advice and assistance where appropriate. Equally, because of the
programme of continual development and improvement we reserve the right to amend or alter characteristics and
design without prior notice. This publication is for information only.
This handbook contains information that has been reproduced with the kind permission of Eurotherm. Such data is
subject to the following notice.
Isothermal Technology Limited
Pine Grove, Southport, Merseyside, PR9 9AG, England
Telephone: [phone]/544611 / Fax: [phone]
Email: [email protected]o.uk / Website: www.isotech.co.uk

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WTPMB Model 18233: 07–12/16
CAUTIONARY NOTE
ISOTECH PRODUCTS ARE INTENDED FOR USE BY TECHNICALLY TRAINED AND COMPETENT
PERSONNEL FAMILIAR WITH GOOD MEASUREMENT PRACTICES.
IT IS EXPECTED THAT PERSONNEL USING THIS EQUIPMENT WILL BE COMPETENT WITH THE
MANAGEMENT OF APPARATUS WHICH MAY BE POWERED OR UNDER EXTREMES OF TEMPERATURE, AND
ARE ABLE TO APPRECIATE THE HAZARDS WHICH MAY BE ASSOCIATED WITH, AND THE PRECAUTIONS
TO BE TAKEN WITH, SUCH EQUIPMENT.

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WTPMB Model 18233: 07–12/16
GENERAL INFORMATION
SYSTEM DESCRIPTION
The Water Triple Point Bath is designed to provide an environment in which up to four Water Triple Point Cells can
be maintained for use as primary standards of temperature. The life of the ice mantle in a triple point cell is
dependent upon the initial geometry of the mantle, the use of the cell and the temperature of its environment. The
bath has sufficient stability to maintain a mantle for six weeks or more, provided that the cell is not thermally
overloaded.
The bath contains about 34 litres of water which is agitated with air supplied by a pump located on the controller
chassis. The temperature of the water is maintained at 0.010°C by four thermoelectric cooling modules. The current
through the cooling modules is controlled by a proportional controller which uses a precision, high stability,
thermistor probe to sense bath temperature.
The cooling system has sufficient cooling capacity to bring the bath to operating temperature from 25°C in about two
days. The limited cooling capacity provides some protection for the cells in case of control failure, since the water in
the bath would freeze only very slowly. Additional protection is provided by a fault detection system which is
triggered if either of the cooling surfaces drops below a preset limit or by the formation of ice on the cooling surfaces
of the bath. Triggering of either fault detector will, after a built-in delay, activate the fault alarm and remove power
from the coolers until the system is reset by turning the power switch off and back on.
SPECIFICATIONS
Size: 910mm high, 635mm wide, 710mm deep
Weight: Approximately 66kg dry
Acceptable Ambient Conditions:
Operating: Temperature 15°C to 26°C; relative humidity 10% to 80%
Storage: Temperature -30°C to 55°C; relative humidity less than 85%
Power Requirements:
115/230v AC, 50/60 Hz, 150 VA max
Bath Fluid: De-ionised water, approximately 34 litres (7½ gal)
Bath Temperature: 0.010°C nominal (adjustable
-0.5°C to +0.5°C, approximately)
±2mK/month

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WTPMB Model 18233: 07–12/16
OPERATING INSTRUCTIONS
INSTALLATION
Location
The typical industrial standards laboratory provides an environment suitable for the bath, which is designed to operate
at an ambient temperature between 15 and 26°C, in air that is relatively free of particulate material (particularly
soluble salts) and soluble or corrosive gases such as ammonia or sulphur dioxide. The clearance necessary for cooling
air to circulate through the back of the cabinet is provided by the extended frame around the air filter. This frame
may be placed directly against a wall as long as the lower opening is not obstructed. The cabinet is equipped with
castors so that it may be moved easily; however, care must be taken to avoid splashing water out of the bath. Power
requirements need no special consideration; maximum power consumption is 150VA, and interruptions of a few
minutes will not affect the condition of the cells because of the large thermal inertia of the bath.
General Layout
Figure 1. Front View:
1. Cell Access
2. Lid
3. Name Plate
4. Control Facia
5. Precool Pocket
6. Handle