Related Manuals for SunPower CryoTel MT
Summary of Contents for SunPower CryoTel MT
- Page 1 CryoTel Family Free-Piston Stirling Cryocoolers OPERATING INSTRUCTIONS Model : CryoTel MT Version 4 Issued: March 25, 2010...
- Page 2 Intellectual Property Declaration Manufactured by Sunpower, Inc., under the following patents: U.S. Pats 4,583,364; 4,602,174; 4,623,808; 4,649,283; 4,805,408; 4,864,232; 4,866,378; 4,912,409; 4,926,123; 5,003,777; 5,148,066; 5,342,176; 5,385,021; 5,450,521; 5,457,956; 5,461,859; 5,496,153; 5,502,968; 5,525,845; 5,537,820; 5,592,073; 5,642,088; 5,642,622; 5,715,693; ® SUNPOWER 5,749,226; 5,775,273; 5,873,246; 5,941,079; 6,035,637; 6,038,874; 6,170,442; 6,199,381; 6,293,184; 6,446,336 B1;...
- Page 3 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. Sunpower Inc. CryoTel MT Operating Instructions version 4...
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Page 4: Table Of Contents
XII. CryoTel Serial Communications Command Reference . 20 A. Serial Interface Specifications . 20 B. Controller Connector Wiring Information C. CryoTel MT Terminal Emulator Commands D. Remote On-Off control..21 E. Allowable Number Formats .. 22 Sunpower Inc. CryoTel... - Page 5 Figure 10: Controller Temperature Sensor Connector .. 13 Figure 11: Water Jacket Heat Rejection Figure 12: Cooling Fin Heat Rejection Figure 13: CryoTel MT Control Board . 16 Figure 14: Controller LED s and 5 pin Connector Figure 15: Optocoupler Circuit ..
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Page 7: Introduction
Sunpower support service at phone (740)-594-2221; email cryo-support@sunpower.com CryoTel MT dimensions: length with balancer: 223 mm (8.9 in); length without balancer: 183 mm (7.2 in); diameter: 73 mm (2.9 in); mass: 1.95 kg Figure 1: CryoTel MT Sunpower Inc. -
Page 8: Precautions (Dos And Don Ts)
The handling and operational Dos and Don ts are listed below. Refer to the diagram of the CryoTel MT in Figure 2. CRITICAL! Do not operate the cryocooler without adequate cooling at the heat rejection site. -
Page 9: Unpacking
The cold finger must be protected from any contact as well. The cold finger is delicate. Any deformation of the cold finger, such as small dents, bending, etc. will ruin the cryocooler. Sunpower Inc. CryoTel MT Operating Instructions version 4... -
Page 10: Mechanical Mounting
TIG. It is recommended that, if needed, the customer allow Sunpower to perform the welding operation. The mechanical structure 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 absorber from the cryostat in a given application. -
Page 11: Cold End Vacuum
However, an o-ring may corrode and become brittle over an extended period of time. For customer applications requiring long-term vacuum without using a vacuum pump, it is recommended that the cryostat be welded to the CryoTel vacuum interface. Sunpower Inc. CryoTel MT Operating Instructions version 4... -
Page 12: Feedthroughs
The CryoTel MT is shipped with a power cable that attaches to the feedthroughs and the controller. This wiring harness consists of orange and white 16 gauge wires with a molded plastic connector for the feedthroughs at one end and a plastic connector housing that plugs directly into the controller output cable of the same wire colors. -
Page 13: Temperature Sensor
The controller sensor may be either a PT-111 platinum RTD or equivalent. Sunpower packages the PT-111 in a copper disk so that the sensors are identical in size, shape and wiring. -
Page 14: Figure 9: Test Cap Assembly
Table 1 shows the proper connection of the wires. Figure 10 and Table 2 describe proper connections of the wiring harness to the CryoTel Controller. Sunpower Inc. CryoTel MT Operating Instructions version 4... -
Page 15: Heat Rejection
Overheating the cryocooler will cause permanent damage. A. Water Jacket Sunpower can provide a permanent or removable water cooling jacket with the CryoTel MT (Fig. 11 both are identical in appearance). Use a suitable thermal grease to maximize conduction between the heat rejector and the water jacket if using a removable unit (the permanent unit is installed at the factory and does not require thermal grease). -
Page 16: Copper Fins
It is also recommended to electrically interlock the cooling fan and the controller in order to ensure that the cooler cannot operate without also turning on the fan. For additional cost, Sunpower is able to provide a fan, shroud, and controller that are suitable for laboratory testing. -
Page 17: Cryotel Operation
B. Beginning Operation 1. Prepare the CryoTel MT for testing as described above. 2. Connect the power cables for the CryoTel MT to the controller s mating connector (controller connections in Fig. 13). a. Verify the correct polarity is observed with respect to the CryoTel MT orange power cable wires are positive, white wires are negative. -
Page 18: Figure 13: Cryotel Mt Control Board
4. Allow cold tip temperature to stabilize at desired cold end temperature a. Proper operation of the CryoTel MT requires a minimum loading of 2 Watts. If minimum load requirements are not met, the stabilized temperature will be below 77... -
Page 19: Operation Shutdown
Applying a heat load to the cold tip during the warming process reduces the time needed to reach room temperature. b. Sunpower recommends using a relay in conjunction with the temperature sensor to ensure that the power supply to the heat load shuts off when the cold tip temperature reaches 300 K. -
Page 20: Led And 5 Pin Connector Summary
PIN 1 PIN 5 Figure 14: Controller LED s and 5 pin Connector PIN 1 Darlington Phototransistor (MOCD223) PIN 5 Figure 15: Optocoupler Circuit. Phototransistor is on when green LED is on. Sunpower Inc. CryoTel MT Operating Instructions version 4... - Page 21 This page intentionally left blank. Sunpower Inc. CryoTel MT Operating Instructions version 4...
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Page 22: Cryotel Serial Communications Command Reference
Use of an external program, such as LabVIEW , to establish closed loop control of the cryocooler via serial communication, may cause controller malfunction. This malfunction condition requires the controller to be returned to Sunpower, Inc. for reprogramming. Manual setpoint adjustments may be made as required without problem. - Page 23 Pins 3 and 5 on the RJ45 serial communications port are used as the signal input. Shorting these pins together enables the controller output; open circuit disables the controller output. Sunpower Inc. CryoTel MT Operating Instructions version 4...
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Page 24: Allowable Number Formats
When using the terminal emulator to command the controller, all input numbers should be in one of the following formats. X is a digit from 0 to 9. XX.X XXX.X X.XX XX.XX XXX.XX Sunpower Inc. CryoTel MT Operating Instructions version 4... - Page 25 End of CryoTel® MT Operating Instructions Version 4 Sunpower Inc. CryoTel MT Operating Instructions version 4...
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