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Isotech B8-30-130 User & Maintenance Manual

Water triple point cells
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WATER TRIPLE POINT CELLS
MODELS B12 & B8
User Maintenance Manual/Handbook
Isothermal Technology Limited, Pine Grove, Southport, Merseyside, PR9 9AG, England
Telephone: +44 (0)1704 543830 Fax: +44 (0)1704 544799 Email: info@isotech.co.uk Website:
www.isotech.co.uk
Page 1 of 10
WTPC B12 & B8 – Issue 8 (07/20)

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Summary of Contents for Isotech B8-30-130

  • Page 1 MODELS B12 & B8 User Maintenance Manual/Handbook Isothermal Technology Limited, Pine Grove, Southport, Merseyside, PR9 9AG, England Telephone: +44 (0)1704 543830 Fax: +44 (0)1704 544799 Email: info@isotech.co.uk Website: www.isotech.co.uk Page 1 of 10 WTPC B12 & B8 – Issue 8 (07/20)
  • Page 2 This publication is for information only. 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 2 of 10 WTPC B12 & B8 – Issue 8 (07/20)

  • Page 3: Table Of Contents

    PREPARATION OF B12 AND B8 TYPE WTP CELLS USING THE LIQUID NITROGEN COOLED METAL ROD METHOD ................................... 9 PREPARATION OF B12 TYPE WTP CELLS USING THE ISOTECH MODEL 452 ICE MANTLE MAKER....10 Page 3 of 10 WTPC B12 & B8 – Issue 8 (07/20)

  • Page 4: Introduction

    INTRODUCTION A triple point of water cell consists of a volume of distilled water sealed under vacuum within a glass cylinder containing a re-entrant tube. By semi-freezing the water a situation arises where water, ice and water vapour exist together in equilibrium. This can only occur at +0.01°C. A sensor placed in the re- entrant tube will attain this temperature within the tolerance quoted above.

  • Page 5: Specification

    SPECIFICATION MODEL NO. B8-30-130 B12-46-210 B12-40-210 Size: Length 175mm 355mm 350mm Diameter 30mm 46mm 40mm Re-entrant tube: Length 140mm 320mm 320mm Internal Diameter 12mm 12mm Immersion depth within the ice mantle: 130mm 210mm 210mm (±10mm) Uncertainty (2 Sigma) (when ordered with ±0.0005°C...

  • Page 6: Preparation Of B12 And B8 Type Wtp Cells Using The Supercool And Nucleation Method (Slush Method) In Conjunction With Isotech Equipment

    B12 and B8 type water triple point cells can be realised in a variety of Isotech equipment, the procedural details are generally the same, however the following sections highlight the differences and precautions that must be taken into account.

  • Page 7: Stirred Liquid Baths

    8. The cell is returned quickly to the block bath and the temperature increased to -0.1°C. This gradually causes the ice to grow back to the outer wall of the cell so the ice mantle should be checked regularly and if required the outer surface of the cell warmed by hand again. Important Note: Knowledge of the dry block bath controller error is critical in order to ensure that the temperature of the block bath actually attains -0.1 °C, a temperature lower may cause an increase in the growth of the ice mantle and a temperature higher may cause the ice mantle to melt.
  • Page 8 Important Note: Knowledge of the stirred liquid bath controller error is critical in order to ensure that the temperature of the stirred liquid bath actually attains -0.1°C, a temperature lower may cause an increase in the growth of the ice mantle and a temperature higher may cause the ice mantle to melt. 6.

  • Page 9: Preparation Of B12 And B8 Type Wtp Cells Using The Liquid Nitrogen Cooled Metal Rod Method

    LIQUID NITROGEN COOLED METAL ROD METHOD This method describes an alternative way of creating an ice mantle in Isotech B12 and B8 type cells should an Isotech bath not be available. It utilises 6mm diameter solid metal rods that have been cooled in Liquid Nitrogen (-195.798°C).

  • Page 10: Preparation Of B12 Type Wtp Cells Using The Isotech Model 452 Ice Mantle Maker

    WTP cell. The Model 452 is a dedicated piece of equipment designed specifically for the efficient creation of ice mantles. A procedure for the use of this equipment is detailed in the manual for the Model 452, contact Isotech for details.

This manual is also suitable for:

B12-46-210B12-40-210

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