Oxford OptistatDN User Manual - Original Instructions
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Oxford OptistatDN User Manual - Original Instructions

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User Manual - Original Instructions
OptistatDN

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  • Page 1 User Manual - Original Instructions OptistatDN...
  • Page 2 – EN 50581:2012 Technical documentation for the assessment of electrical and electronic products with respect to the restriction of hazardous substances. The authorised compiler of the technical file is at Oxford Instruments NanoScience, Tubney Woods, Abingdon, Oxon, OX13 5QX, United Kingdom.
  • Page 3 Oxford Instruments, as well as incorrect use tection individuelle, y compris la protection des mains et des yeux. or operation of the equipment, may relieve Oxford Instruments or its Les cryogènes peuvent déplacer l’oxygène de l’air et provoquer la agent of the responsibility for any resultant non-compliance damage mort par asphyxie.
  • Page 4 EN55011:2009+A1:2010 Emissions standard Electrical equipment for measurement, control and laboratory use: EMC requirements. Please refer to the user manual for more details. Contact us at : Oxford Instruments NanoScience. www.oxford-instruments.com for details. © 2017 Oxford Instruments Nanoscience PSS-OPTDN-5.0.0 (28ff3d8) Sep 2017...
  • Page 5 Optistat DN Manual Oxford Instruments Nanoscience Sep 2017...

  • Page 6: Table Of Contents

    Contents OptistatDN - Principles of Operation 1.1 Revision history ........... . .
  • Page 7 9.2 Troubleshooting ........... . . © 2017 Oxford Instruments Nanoscience...

  • Page 8: Optistatdn - Principles Of Operation

    All such warranties are hereby excluded to the fullest extent permitted by law. Oxford Instruments will not be responsible for the accuracy of the information contained in this document, which is used at your own risk and should not be relied upon. The information could include technical inaccuracies or typographical errors. Changes are periodically made to the information contained herein;...

  • Page 9: Introduction

    Any resultant non-compliance damage, or personal injury would be the fault of the owner or user. Use of the equipment for purposes other than those intended and expressly stated by Oxford Instruments, as well as incorrect use or operation of the equipment, may relieve Oxford Instruments or its agent of the responsibility for any resultant non-compliance damage or injury.

  • Page 10: Restrictions On Use

    • Contact information : how we can contact you. email/telephone. • Details of your query : The nature of your problem, part numbers of spares required, etc. Please contact Oxford Instruments first before attempting to service, repair or return components. 2.6 Contact information Europe, Middle East, Africa and India (EMEAI) OINS, Tubney Woods, Abingdon, Oxon, OX13 5QX, UK Tel: +44(0)1865 393200 (sales) Tel: +44(0)1865 393311 (support) Fax: +44(0)1865 393333 (sales and support) Email: nanoscience@oxinst.com (sales) Email:...
  • Page 11 Optistat DN Manual • Next - Safety Information © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...

  • Page 12: Safety Information

    3.1 Disclaimer Oxford Instruments assumes no liability for use of any document supplied with the system if any unauthorised changes to the content or format have been made.

  • Page 13: Specific Hazards

    The electrical supply to the system must include an isolation box to ensure that mains electrical power to the system can be isolated. The isolation box must allow the supply to be locked OFF, but must NOT allow the supply to be locked ON. © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...

  • Page 14: Protective Earth

    The correct operation of these relief valves is critical to the safety of the system. 3.9 Weight and lifting Incorrectly lifting heavy objects can cause severe injury. Use the appropriate lifting equipment, operated by fully © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...

  • Page 15: Magnetic Fields

    Areas where these chemicals are stored or used must be well ventilated to avoid the danger of suffocation. Oxygen level detection equipment should be installed in suitable locations to warn personnel if the oxygen concentration falls below a threshold value. Take precautions to prevent spillage of liquid cryogens. © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...

  • Page 16: Fire

    This precaution is especially important if you system includes a superconducting magnet. 3.14 Maintenance Observe the necessary maintenance schedule for the system. Consult Oxford Instruments if you are unsure about the required procedures. • Next - System Description ©...

  • Page 17: System Description

    System Description 4.1 The Cryostat The OptistatDN is a liquid Nitrogen cryostat designed principally for optical spectroscopy and electrical measurements requiring optical access. The sample temperature is continuously variable between 77K and 500K. This manual describes the operation of the system in conjunction with an Oxford Instruments Mercury iTC temperature controller.
  • Page 18 Optistat DN Manual Figure 4.2: Optistat DN schematic © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...
  • Page 19 Copper gaskets are used for high temperature systems up to 500K. Both types of seal and the techniques needed to replace them are described later. • Next - Installation © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...

  • Page 20: Installation

    5.4 Electrical connections to the temperature controller The Mercury iTC has been configured by Oxford Instruments to suit the system ordered. When you first switch on the Mercury iTC you will see the instrument home screen, similar to that shown below: The Mercury iTC temperature controller should be connected to the cryostat as follows: ©...
  • Page 21 • The indicated temperature should now read approximately 295K (room temperature). 5.4.1 Temperature and voltage limits If you have bought a cryostat and temperature controller together from Oxford Instruments, the temperature controller will have been set up in the factory: •...

  • Page 22: Activating The Sorb

    • Tap Heater Auto • Tap Fixed The sorb is now heated to 308K using the following sequence: Final Temperature / K Time to Temperature / min Time at Temperature / min © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...
  • Page 23 • Tap Resistance Set and change the resistance to the value given in the test results. This will be about 20Ω. • Tap Voltage and change this to 40V. • Tap Home to return to the home screen. • Next - System Operation © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...

  • Page 24: System Operation

    Nitrogen from the reservoir has been used to cool the heat exchanger to base temperature, you should now refill the reservoir, so that the cryostat has a long hold time at base temperature. © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...
  • Page 25 Optistat DN Manual Figure 6.1: Exhaust needle valve © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...

  • Page 26: Operation At Base Temperature

    Close the exhaust valve (needle valve) fully, and then open it by quarter to half a turn. This sets the flow of liquid to the heat exchanger at a suitable level. However, the flow can be optimised later. © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...
  • Page 27 Optistat DN Manual Figure 6.2: Mercury control screen Figure 6.3: Mercury PID table © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...
  • Page 28 It is best to warm the sample to room temperature before you change it. This is easily done using a 300K set point on the temperature controller. © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...
  • Page 29 If you do not need to warm the system quickly it may be left to warm up naturally. If you wish to warm up more quickly, pour the liquid Nitrogen out of the reservoir and allow a small volume of dry Nitrogen gas into the OVC to break the vacuum. • Next - Service and Maintenance © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...
  • Page 30 The windows should be carefully tested for leaks with a mass spectrometer leak detector if one is available. Note however, some window materials (for example polythene, mylar, and aluminised mylar) are porous to Helium gas at room temperature, and cannot be leak tested in this way. © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...
  • Page 31 Optistat DN Manual Figure 7.1: Changing outer windows © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...
  • Page 32 Clean a new copper gasket thoroughly. The spare gaskets supplied by Oxford Instruments are thoroughly annealed. If you make your own gaskets you should remember to do this.
  • Page 33 Optistat DN Manual Figure 7.2: Changing Indium-sealed windows © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...
  • Page 34 1PWR-U All single phase powered units supplied with the system can be used worldwide without the need for configuration. The maximum power consumption of each unit in this application is: Component Power Consumption MercuryiTC controller 450 W © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...
  • Page 35 • The maximum operating temperature will be set accordingly in the Mercury iTC supplied with the system. • Base temperature will depend on the boiling point of liquid Nitrogen which is impacted by atmospheric pressure. 8.6 Further Information • Test Specifications • Microstat-Optistat Index © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...
  • Page 36 100Ω ohms at 273K 138.5Ω ohms at 373 K File “RP51.dat” is provided with the system information on your USB stick. This file contains the generic calibration data for the PT100 © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...
  • Page 37 Remove them immediately after the test, and remember to wear gloves when you do this. If the sample space capillary is blocked, warm it up and blow dry gas through it to remove moisture. © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...
  • Page 38 Check that the heater is not open circuit by checking from pins A to B. If so, the wiring will have to be repaired. Sensor not reading correctly Check the wiring. Check that the CWA0123 adaptor lead has been removed. • Back to - Optistat DN front page © 2017 Oxford Instruments Nanoscience MAN-OPTDN-1.1.0 (28ff3d8) Sep 2017...

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