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Table of Contents
Related Manuals for Oxford Instruments MicrostatHe
Summary of Contents for Oxford Instruments MicrostatHe
- Page 1 User Manual - Original Instructions MicrostatHe...
- 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 Use of the equipment for purposes other than those intended and peut causer des blessures graves. Utilisez un équipement de pro- expressly stated by Oxford Instruments NanoScience, as well as tection individuelle, y compris la protection des mains et des yeux.
- 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-MHE-5.0.0 (28ff3d8) Nov 2017...
- Page 5 Microstat He Manual Oxford Instruments Nanoscience Sep 2017...
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Page 6: Table Of Contents
Contents MicrostatHe - Principles of Operation 1.1 Revision history ........... . . - Page 7 7.2 Removing the OVC and radiation shield - MicrostatHe and He-R ......
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Page 8: Microstathe - 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 Microstat He Manual • Next - Safety Information © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017...
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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-MHE-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-MHE-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-MHE-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
4.1 The Cryostats Both the MicrostatHe and MicrostatHe-R are continuous flow cryostats designed principally to allow a sample to be cooled to a low temperature and studied with an optical microscope. The window arrangement for the standard MicrostatHe allows the sample to be brought close to the objective lens of a microscope. - Page 18 Up to two windows can be fitted to the MicrostatHe. Each window is permanently bonded into the OVC flange, which is shaped to allow the sample to be mounted as close as possible to the inside surface of the window. It also allows a typical optical microscope objective lens turret to be rotated without withdrawing the microscope objective.
- Page 19 Microstat He Manual Figure 4.3: Microstat He-R schematic © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017...
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Page 20: Continuous Flow Cryostats
4.4 The gas flow pump and flow controller The Oxford Instruments GF4 gas flow pump is used to promote the flow through the cryostat. It is an oil-free, twin-piston pump with a nominal displacement of 42 litres per minute. The air leak rate is guaranteed to be less than 10cm /min. -
Page 21: Installation
Oxford Instruments immediately. To run this system you need the following components: • The cryostat: MicrostatHe, MicrostatHe-R with Rectangular tail or OptistatCF-V • Liquid Helium or liquid Nitrogen storage dewar • Cryogen transfer tube (LLT) with suitable storage dewar adapter •... -
Page 22: Evacuating The Outer Vacuum Chamber (Ovc)
The other connections should be made as shown in the figure above. The exhaust line from the VC-U can either be connected to a Helium recovery system or vented to the atmosphere. © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017... -
Page 23: Electrical Connections To The Temperature Controller
5.6 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: Figure 5.1: Mercury home screen... - Page 24 The recommended values for the “Heater Voltage Limit” and the “Temperature Limit” are given with the test results for the cryostat. If you do not safeguard the system it is possible to cause serious damage. • Next - System Operation © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017...
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Page 25: System Operation
Temperatures below 4.2K are achieved by lowering the pressure in the heat exchanger. Since the pumping speed of any pump is limited, this can only be achieved by limiting the rate at which Helium is supplied, using the needle valve in the transfer tube. © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017... - Page 26 As you do this, the temperature will fall, until you reach the base temperature of the system (point B). Now select the desired SET temperature on the Mercury iTC, and switch the Mercury iTC heater control to Auto. © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017...
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Page 27: Temperature Control Above 4.2K
PID values are described in the mercury iTC manual. Tap Close to return to the control screen, then tap Home to return to the home screen. © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017... - Page 28 Microstat He Manual Figure 6.3: Mercury PID table Figure 6.4: List of PID tables © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017...
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Page 29: Controlling At A Set Temperature
Never allow Helium gas into the OVC as it is difficult to pump it out again. Do not use a bladder on the OVC that has previously been used with Helium. © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017... -
Page 30: Changing Samples
Warm the cryostat to room temperature, as described above. The sample is mounted on the heat exchanger within the OVC. For the MicrostatHe cryostats, the OVC and part of the radiation shield have to be removed in order to change samples. For the Optistat it is only necessary to remove the OVC. - Page 31 9. The PID settings on the temperature controller may be different from those given in the test results. Typically, the P and I values should be increased slightly. • Next - Service and Maintenance © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017...
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Page 32: Service And Maintenance
OVC. Ensure that the O-ring is clean, undamaged and lightly greased. Replace any damaged O-rings. 7.2 Removing the OVC and radiation shield - MicrostatHe and He-R The OVC and radiation shield only need to be removed if you wish to: •... - Page 33 The pressure from the wire clip should be sufficient to make sure that the window is cooled properly. • Next - Appendices © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017...
- Page 34 Microstat He Manual Figure 7.1: Changing outer windows © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017...
- Page 35 Microstat He Manual Figure 7.2: Changing radiation shield windows © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017...
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Page 36: Microstat He Specifications
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-MHE-1.1.0 (28ff3d8) Sep 2017... -
Page 37: Notes
8.5 Notes • Base temperature may be reduced by using a rotary pump, such as the EPS40. Please enquire for further details. 8.6 Further Information • Test Specifications • Microstat-Optistat Index © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017... -
Page 38: Appendices
> 1 MΩ 9.1.2 Additional Wiring - LX10 connector An additional 10-pin connector, fitted to the top plate of the cryostat, is wired to terminals located just above the sample holder. © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017... -
Page 39: Troubleshooting
Check that the PID settings on the temperature controller and the cryogen flow rate are as suggested in the manual and test results. Cryostat cannot be warmed up from base temperature OR Heater not working Check that the set temperature is higher than the present sample temperature, or switch the heater on manually. © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017... - Page 40 Sensor not reading correctly Check the wiring. • Back to - Microstat He front page • Back to - Microstat He-R front page • Back to - Optistat CF-V front page © 2017 Oxford Instruments Nanoscience MAN-MHE-1.1.0 (28ff3d8) Sep 2017...
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