SunPower CryoTel MT Operating Instructions Manual Download Page 3

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Sunpower Inc. CryoTel

MT Operating Instructions version 4

Sunpower, the Sunpower graphic identifier, and CryoTel are trademarks of Sunpower, Inc. and

are registered in the U.S. and other countries. Other products, logos, and Company names

mentioned herein may be trademarks of their respective owners.

Summary of Contents for CryoTel MT

Page 1: ...CryoTelTM Family Free Piston Stirling Cryocoolers OPERATING INSTRUCTIONS Model CryoTel MT Version 4 Issued March 25 2010...

Page 2: ...ds Sweden and Germany as DE 69329862 6 08 EPO 0693160 issued in Italy UK Netherlands France Germany as DE 69403468 T2 EPO 0754364 1B issued in France Italy UK Netherlands and Germany as DE 69526217 3...

Page 3: ...version 4 Sunpower the Sunpower graphic identifier and CryoTel are trademarks of Sunpower Inc and are registered in the U S and other countries Other products logos and Company names mentioned herein...

Page 4: ...rature Sensor 11 IX Heat Rejection 13 A Water Jacket 13 B Copper Fins 14 C Conducting Solid 14 X CryoTel Operation 15 A Preparation 15 B Beginning Operation 15 C Operation Shutdown 17 XI LED and 5 Pin...

Page 5: ...ting Holes 9 Figure 6 Power Cable 10 Figure 7 Rear Pressure Vessel End Plate 11 Figure 8 Temperature Sensor and Wiring Harness 11 Figure 9 Test Cap Assembly 12 Figure 10 Controller Temperature Sensor...

Page 6: ...Sunpower Inc CryoTel MT Operating Instructions version 4 4 This page intentionally left blank...

Page 7: ...s but fragile in others This operating manual provides standard use instructions and precautions Please post where technicians will be working with the unit Please do not assume that if a warning or i...

Page 8: ...er service tube 7 Subject the electrical feedthroughs to mechanical stress i e axial or radial movements axial loads blows or the like 8 Mount the cooler by suspending it from the balance absorber mou...

Page 9: ...g the cold finger The CryoTelTM MT may sit horizontally on a level bench top or table but the cooler must be supported to prohibit rolling The cold finger must be protected from any contact as well Th...

Page 10: ...re including the cryostat attachment plate heat rejection copper and transition have been designed to allow mounting the entire assembly by the cryostat and cantilevering the cooler and vibration abso...

Page 11: ...yostat As noted above a flange can connect the cryostat and the stainless steel vacuum flange with an o ring seal or welded attachment Fig 2 When using a mechanical vacuum pump it is appropriate to se...

Page 12: ...his harness is shown in Figure 6 Figure 6 Power Cable It is necessary to remove the balance absorber in order to install the power cable The balance absorber is attached with the center M5 screw Remov...

Page 13: ...the cryocooler will be severely limited and temperature control will not function The controller sensor may be either a PT 111 platinum RTD or equivalent Sunpower packages the PT 111 in a copper disk...

Page 14: ...erature measurement Apply an appropriate thermal grease to the bottom face of the test cap in order to maximize conduction Mount the test cap to the cold tip using the M3 threaded holes on the cold ti...

Page 15: ...grease The thermal grease should be refreshed periodically as it will dry out over time After connecting the water supply to the water jacket for heat rejection ensure that air is removed from the wat...

Page 16: ...essure vessel Therefore avoid permitting any containment structure for the cryocooler to hinder the heat rejection from any part of the cooler It is also recommended to electrically interlock the cool...

Page 17: ...ntroller s mating connector as described previously using the provided wiring harness and connector See Figure 13 for controller connections 7 Attach the vacuum pump to cryostat start the vacuum and a...

Page 18: ...ontroller then applies a 60 Hz AC voltage to the motor creating the oscillating motion of the piston that begins the cooling process e The controller increases the power input to the cryocooler based...

Page 19: ...o prevent this allow the cold tip to reach a temperature above 60 K before shutting down 2 Allow the cold tip and the rest of the cryocooler temperature to rise to room temperature before opening the...

Page 20: ...t as shown in Figure 15 When the green LED is on current is able to flow from pin 1 to pin 5 through the Darlington Phototransistor When the green LED is off the current flow through the phototransist...

Page 21: ...Sunpower Inc CryoTel MT Operating Instructions version 4 19 This page intentionally left blank...

Page 22: ...and Pin out of RS 232 Connector on CryoTel Controller Pin Function 1 RX 2 GND 3 Do not connect 4 GND 5 Do not connect 6 GND 7 TX 8 GND C CryoTel MT Terminal Emulator Commands The following pages show...

Page 23: ...ature and increases as the cold temperature decreases 8 Display current command power and power limits a Command E CR b The top value is the maximum allowable power for the current temperature The mid...

Page 24: ...entered at the end of the sequence to prevent the software being compromised during controller operation Note after you enable this function pins 3 and 5 must to be connected in order to drive the cry...

Page 25: ...Sunpower Inc CryoTel MT Operating Instructions version 4 23 End of CryoTel MT Operating Instructions Version 4...