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Isotech ITL-M-18233 User Maintenance Manual/Handbook

Water triple point maintenance bath
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WATER TRIPLE POINT
MAINTENANCE BATH
MODEL ITL-M-18233
User Maintenance Manual/Handbook
Isothermal Technology Limited, Pine Grove, Southport, PR9 9AG, England
Tel: +44 (0)1704 543830 Fax: +44 (0)1704 544799 Internet: www.isotech.co.uk E-mail: info@isotech.co.uk
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.
Page 1 of 32
WTPMB Model 18233: 07–12/16

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  • Page 1 Isothermal Technology Limited, Pine Grove, Southport, PR9 9AG, England Tel: +44 (0)1704 543830 Fax: +44 (0)1704 544799 Internet: www.isotech.co.uk E-mail: info@isotech.co.uk 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.

  • Page 2: Table Of Contents

    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 ..........................
  • Page 3 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 Page 3 of 32 WTPMB Model 18233: 07–12/16...

  • Page 4: Emc Information

    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.

  • Page 5: Electrical Safety

    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.

  • Page 6: Health And Safety Instructions

    If cased, do not return the apparatus to its carrying case until the unit has cooled. There are no user serviceable parts inside. Contact your nearest Isotech agent for repair. Ensure materials, especially flammable materials are kept away from hot parts of the apparatus, to prevent fire risk.

  • Page 7: Guarantee

    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: +44 (0)1704 543830/544611 / Fax: +44 (0)1704 544799 Email: info@isotech.co.uk / Website: www.isotech.co.uk Page 7 of 32 WTPMB Model 18233: 07–12/16...

  • Page 8: Cautionary Note

    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.

  • Page 9: General Information

    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.

  • Page 10: Operating Instructions

    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.
  • Page 11 Figure 2. Rear View: Air Filter Identification Plate Power Entry Fan Socket Tank Power Socket Air Adjust Air Output Alarm Right Sensor Alarm Left Sensor Controller Sensor Figure 3. Control Panel: USB Port Alarm Left Beacon Output Beacon Ethernet Controller Alarm Right Beacon Power Switch Handles...

  • Page 12: Start Up

    Start Up Visually inspect the system to ensure that it has not been damaged in transit. Connect the mains cable to a suitable supply socket outlet and turn the power switch on. The alarm sounder will operate momentarily while the controller boots up. Fill the tank to the top of the cell holder tubes with clean, de-ionised water.

  • Page 13: Using The Controller

    USING THE CONTROLLER The controller installed on this equipment uses an advanced three loop controller with a multi-channel sensor input. Other features of the controller are:  Built in data logging  Ethernet connection  USB host for controller updates and data export ...

  • Page 14: The Isotech Splash Screen And Controls

    THE ISOTECH SPLASH SCREEN AND CONTROLS Figure 4. The USER INTERFACE start up screen and controls: ISOTECH splash screen PAGE button SCROLL button DOWN button UP button Figure 5. The HOME page: Water temperature Setpoint Left alarm sensor value Right alarm sensor value...

  • Page 15: How To Log In As The Supervisor

    HOW TO LOG IN AS THE SUPERVISOR Figure 6 Press the Page button to display the Home menu Scroll to LOG IN Press the SCROLL button Press up to scroll to SUPERVISOR in dialogue box Press the SCROLL button to prompt for a passcode Select code 15 from the soft keyboard Press PAGE button to prompt to accept the changes Select Yes and enter with SCROLL button to display the SUPERVISOR screen (figure 9)

  • Page 16: Changing The Set Point

    To change the setpoint of the equipment From the ISOTECH homepage, press the SCROLL button once, this will highlight the SETPOINT ADJUST box. Press the SCROLL button once more and this will allow adjustment of the setpoint via the UP/DOWN buttons.

  • Page 17: How To Use The Alarms And Additional Safety Features Of The Controller

    HOW TO USE THE ALARMS AND ADDITIONAL SAFETY FEATURES OF THE CONTROLLER This equipment has several alarm features built in to facilitate the safety of the Water Triple point cells contained within. In almost all conditions the controller will reset the set point to a safe value to ensure the integrity of the cell(s) and to prevent the freezing of the water within the cell(s).

  • Page 18: How To Apply A Fixed Offset To The Control Sensor To Compensate For Temperature Errors

     Italian  Spanish Note: Only the Supervisor and Engineer menus will read in the alternative language. The Isotech Home screen will still read in English when this feature is used. TO CHANGE THE DATE AND TIME OR LANGUAGE: ...

  • Page 19: The Network Interface

    Log in as the SUPERVISOR Plug a suitable USB memory stick to the socket on the control panel (Figure 1, item 6) Ensure the controller has accepted the memory stick by the icon in the lower left of the ISOTECH homepage (figure 3)

  • Page 20: Ftp Server Archiving

    When the selection is entered by pressing the SCROLL button, the transfer will begin (this may take several minutes depending on the selection made) When the transfer is complete, remove the USB stick and exit SUPERVISOR mode The data will be stored in a folder called HISTORY. FTP SERVER ARCHIVING: This allows the archiving of recorder files to a remote computer via the RJ45 type connector on the front panel, either directly or via a network.

  • Page 21: Maintenance

    MAINTENANCE ROUTINE MAINTENANCE Full power is required for about 48 hours to cool the bath from ambient to operating temperature. The controller will normally apply full power for several minutes if water is added to the bath, or if any warm object is placed into the bath.

  • Page 22: Theory Of Operation

    REPAIR PROCEDURES Troubleshooting and repair procedures are generally straightforward for an experienced technician. Isotech personnel are available to answer any question that might arise. The following information might, however, prove useful. CONTROLLER REMOVAL The control assembly houses the system power supply, the controller and fault detector circuits and the stirring air pump.

  • Page 23: Air Pump Replacement

    AIR PUMP REPLACEMENT Make sure that power is disconnected and remove the controller from the cabinet as described above. Remove four nuts holding the pump plate shock mount brackets to the chassis studs. Replace the defective pump. Remount the pump assembly, and re-install the controller in the cabinet. Test pump operation, and adjust the flow control (R5) for the lowest air flow rate that reliably maintains air flow through all of the holes in both stirring tubes.

  • Page 24: Thermal Fuse Replacement

    THERMAL FUSE REPLACEMENT Thermal fuses are attached to the top of one heat sink on each side of the tank assembly. Remove the tank assembly from the cabinet as described above. Test each thermal fuse with an ohmmeter. The normal resistance is only a few milliohms. Unsolder the connections at each end of the defective thermal fuse.

  • Page 25: Refrigeration Diagram

    Refrigeration Diagram Figure 8. q1 = Rate of heat flow from ambient to the bath. q2 = Heat flow from the bath to the four thermo electric coolers. (This is the same rate of heat flow as q1, but at about 0°C). q3 = Heat flow from the heat sinks to ambient.

  • Page 26: Appendix A: An Introduction To The Water Triple Point

    The illustration overleaf shows the configuration and dimensions of cells available from Jarrett-Isotech. The Isotech Water Triple Point Bath, as furnished, will accommodate A-11 (11mm bore) and A-13 (13mm bore) cells; the cell holding tubes will accommodate B11/65; B13/65 and B16/65 cells with modification of the top bushing and bottom plug.
  • Page 27 Page 27 of 32 WTPMB Model 18233: 07–12/16...

  • Page 28: Appendix B: Triple Point Cell Operation

    There are various techniques for coating the ice mantle in the cell; Isotech recommends the use of the heatpipe apparatus model 452 which uses either solid carbon dioxide or liquid nitrogen. Ask for details.
  • Page 29 When the well is free of dry ice, remove as much of the alcohol as possible, and place the cell in the Isotech Triple Point Bath. At this time, an inner melt may be formed as described below; however, the temperature of the cell may be as much as 0.0005 Kelvin below 0.01°C, due to stress in the newly formed ice mantle.
  • Page 30 If these tests can be met, the cell is qualified. If not, there is probably a minute crack in the glass which has admitted air. Transportation of water triple point cells is a matter for extreme care. It is preferable to hand carry them in the upright position.

  • Page 31: Isotech I-Cal Easy

    This application allows logging of data from the ADVANCED model. Additionally if a license is purchased it allows for fully automatic calibration including certificate printing and the calculation of coefficients. Refer to the Isotech I-Cal EASY handbook and help system for more details Page 31 of 32...

  • Page 32: Program Editor

    PROGRAM EDITOR This allows set point programs to be created on a PC and uploaded to the ADVANCED model Installation instructions are included with the download Page 32 of 32 WTPMB Model 18233: 07–12/16...

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