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Lake Shore 234 User Manual

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Contents
  1. Table Of Contents
  2. Table Of Contents
  3. INTRODUCTION
  4. Model 234D General Description
  5. Model 234 Specifications
  6. Model 2308-1 Enclosure Description
  7. Model 2308-1 Enclosure Physical Dimensions
  8. Model 2308-12 Case Physical Dimensions
  9. INSTALLATION
  10. Sensor Installation Recommendations
  11. Connecting Leads To The Sensor
  12. Proper Shielding Techniques
  13. CalCurve
  14. Typical Wall Plug-In Power Supply
  15. OPERATION
  16. Output to Temperature Conversion
  17. Output to Log(R) Conversion
  18. REMOTE OPERATION
  19. Serial Interface Operation
  20. QuickBasic Programming Considerations
  21. QuickBasic Sample Program
  22. Serial Interface Command Summary
  23. SERVICE
  24. Model 234 Connectors
  25. CalCurve Field Installation
  26. Calibration
  27. Required Equipment
  28. Calibration Verification
  29. OPTIONS AND ACCESSORIES
  30. Accessories
  31. Sensors
Lake Shore 234 User Manual Manual pdf 16 page image
Lake Shore Model 234/234D User’s Manual2-2 Installation2.3 SENSOR INSTALLATION RECOMMENDATIONSSee the Lake Shore Product Catalog for installation details and sensorspecifications. Call Lake Shore for copies of application notes or sensorinstallation questions.1. Do not ground the sensor.2. Shield leads and connect shield wire to SHIELD on screw terminalconnector only. Do not connect shield at other end of cable.3. Keep leads as short as possible.4. Use twisted-pair wire. Use Lake Shore Duo-Twist™ wire (or equivalent)for two-wire, or Quad-Twist™ wire (or equivalent) for four-wireapplications.5. Thermally anchor lead wires.2.3.1 Sensor MountingBefore installing thecarbon-glass orGermanium sensor,identify the leads asshown. Be sure leadidentification remainsclear even aftersensor installation.Record the sensorserial number andlocation.When installing the sensor, make sure there are no electrical shorts orcurrent leakage paths between the leads or between the leads and ground.If IMI-7031 varnish or epoxy is used, it may soften varnish-type leadinsulations so that high resistance shunts appear between wires if sufficienttime for curing is not allowed.Slide Teflon® spaghetti tubing over bare leads when the possibility ofshorting exists. Avoid putting stress on the device leads and allow forthermal contractions that occur during cooling which could fracture a solderjoint or lead if installed under tension at room temperature.For temporary mounting in cold temperature applications, apply a thin layerof Apiezon® N Grease between the sensor and sample to enhance thermalcontact under slight pressure.CAUTION: Lake Shore will not warranty replace any device damagedby user-designed clamps or solder mounting.For semi-permanent mountings, use Stycast epoxy instead of Apiezon ® NGrease. In all cases, periodically inspect the sensor mounting to verify goodthermal contact to the mounting surface is maintained.
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This manual is suitable for:
234234D
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