Tektronix CPS250 User Manual Download Page 31

Page: 31 / 34

Appendix B: Maintenance

CPS250 User Manual

POWER Light ON, but No Output from A or B Supplies with Power
Supply connected to Circuit

1. Disconnect the CPS250 outputs from the circuit being tested.

Check A and B VOLTAGE and CURRENT controls.

2. If the outputs are good, check the circuit under test for a short or

low resistance.

POWER Light ON, but No Output from Any Supplies with Power Supply
Not Connected to Circuit

Contact your nearest Tektronix service center for servicing.

Summary of Contents for CPS250

Page 1: ...User Manual CPS250 Triple Output Power Supply 070 6740 03 ...

Page 2: ... patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Printed in the U S A Tektronix Inc P O Box 1000 Wilsonville OR 97070 1000 TEKTRONIX and TEK are registered trademarks of Tektronix Inc ...

Page 3: ...any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper...

Page 4: ......

Page 5: ...ower Supply for Use 2 Front Panel 4 Reference 7 Independent Mode Applications 7 Tracking Mode Applications 13 Appendix A Specifications 17 Appendix B Maintenance 19 Cleaning 19 Preparing for Shipment 19 Troubleshooting 20 Appendix C Replaceable Parts 23 Standard Accessories 23 Optional Accessories 23 ...

Page 6: ...cations A 10 Figure 5 Independent Ground Referenced Applications B 10 Figure 6 Connecting the Two 0 20 V Supplies in Series to Produce 0 to 40 V 11 Figure 7 Connections to Provide Fixed 5 V and 0 to 40 V 12 Figure 8 Independent Ground Referenced Applications negative output 12 Figure 9 Independent Ground Referenced Applications positive output 13 Figure 10 Series Tracking Applications 14 Figure 11...

Page 7: ... not apply a voltage to a terminal that is outside the range specified for that terminal Ground the Product This product is grounded through the grounding conductor of the power cord To avoid electric shock the grounding conductor must be connected to earth ground Before making connections to the input or output terminals of the product ensure that the product is properly grounded Do Not Operate W...

Page 8: ...t Damage Precautions Use Proper Power Source Do not operate this product from a power source that applies more than the voltage specified Use Proper Voltage Setting Before applying power ensure that the line selector is in the proper position for the power source being used Provide Proper Ventilation To prevent product overheating provide proper ventilation Do Not Operate With Suspected Failures I...

Page 9: ...result in damage to this product or other property Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product Symbols on the Product The following symbols may appear on the...

Page 10: ...anual Certifications and Compliances CSA Certified Power Cords CSA Certification includes the products and power cords appropriate for use in the North America power network All other power cords supplied are approved for the country of use ...

Page 11: ...of most semiconductor test or experimental applications Two or three of the output voltages may be externally wired to produce voltages different than the standard front panel voltages The Tektronix CPS250 Triple Output Power Supply has a locking multiposition handle that folds under the instrument to allow stacking with other instruments of the same series The power supply is delivered with a set...

Page 12: ...etting and install the correct line voltage fuse before operating the equipment 1 Set the line voltage selectors to the input line voltage These selectors connect internal wiring for various line voltages This product is intended to operate from a power source that does not supply more than 250 VRMS between the supply conductors or between either supply conductor and ground For line voltage ranges...

Page 13: ...er cords specified for this equipment Refer to Appendix C Replaceable Parts on page 23 for power cord part numbers NOTE The center connector blade is connected to the green GND binding post on the front panel 4 Check the V and mA meters for mechanical zero Adjustment may be corrected with the mechanical zero adjust disk located below the center of each meter Refer to Figure 2 item 4 CAUTION To pre...

Page 14: ...ER ON Indicator When lighted LED indicates a power on condition 3 Voltage Meter This meter indicates the voltage level of A or B output depending on the position of the A B meter switch The meter may be mechanically set for zero with the slotted mechanical zero adjust disk below the center of the meter 4 Mechanical Meter Adjustment These slotted plastic disks allow mechanical zero adjustment of th...

Page 15: ...n 9 B CURRENT Control Rotate to set current level available at B output when A B OUTPUTS switch is in INDEPENDENT position Control is inoperative when A B OUTPUTS switch is in the TRACKING position 10 A CURRENT Control Rotate to set current level available at A output when A B OUTPUTS switch is in the INDEPENDENT position 11 A VOLTAGE Control Rotate to set voltage at A output terminals when A B OU...

Page 16: ...Getting Started 6 CPS250 User Manual ...

Page 17: ...ront panel voltage and current controls Ground reference is recommended for safety There are two types of independent mode operation H Series Operation A and B supplies outputs can be set to give 0 V to 40 V output with the A B OUTPUTS switch H Parallel Operation A and B supplies outputs may be set to parallel operation with the A B OUTPUTS switch A and B supplies may be operated in parallel to in...

Page 18: ...s if necessary Load 1 5 V Zero to 2 A Load 2 Zero to 20 V Zero to 0 5 A Load 3 Zero to 20 V Zero to 0 5 A Figure 3 Independent Floating Application Independent Ground Referenced CAUTION To prevent damage to the equipment when using any ground referenced output configuration from the CPS250 the circuit or equipment being powered must be isolated from the CPS250 s line voltage power source Any one o...

Page 19: ...5 V In this configuration each of the positive going 20 V supplies can be varied from 5 V to 15 V 20 V overall The GND post becomes the negative terminal for the A and B outputs The V meter will indicate 0 V when the output is 5 V 5 V when the output is zero and 20 V when the output is 15 V Negative 5 V is taken between GND and the black post of the 5 V 2 A output To set up this configuration proc...

Page 20: ... 20 V from the B supply and 0 V to 20 V from the A supply In this configuration the red terminal of output A is the relative negative terminal because it is connected directly to GND To seu up this configuration proceed as follows Load 1 5 V Zero to 2 A Load 2 Zero to 20 V Zero to 0 5 A Load 3 Zero to 20 V Zero to 0 5 A Figure 5 Independent Ground Referenced Applications B 1 Turn the CPS250 POWER ...

Page 21: ...s only one supply at a time and the mA meter reads total current in either position To read the total voltage the readings from the A position and B position must be added To set up this configuration proceed as follows Load 1 5 V Load 2 Zero to 40 V Figure 6 Connecting the Two 0 20 V Supplies in Series to Product 0 to 40 V 1 Turn POWER to OFF and connect the outputs as shown in Figure 6 2 Set the...

Page 22: ...low the procedures outlined above to operate this configuration Load 1 5 V Load 2 Zero to 40 V Figure 7 Connections to Provide Fixed 5 V and 0 to 40 V Figure 8 shows the configuration for three ground referenced negative supplies Load 1 5 V Load 2 Zero to 20 V Load 3 Zero to 20 V Figure 8 Independent Ground Referenced Applications negative output ...

Page 23: ...variable supply is connected internally to the output of the B variable supply When set to the SERIES TRACK ING mode the output may be floating or ground referenced However only one terminal of the two variable supplies may be grounded These options are shown in Figure 10 on page 14 The output voltage and current are controlled by the A VOLTAGE and A CURRENT controls For convenience set the B VOLT...

Page 24: ...e outputs of the A and B variable supplies are connected The resulting combination is a single supply capable of providing 0 V to 20 V and up to 1 2 A Control is provided by the A VOLTAGE and A CURRENT controls The B VOLTAGE and B CURRENT controls should be set fully clockwise The parallel output may be floating or ground referenced but only one terminal or may be at ground reference Those options...

Page 25: ...Reference CPS250 User Manual 15 Load 1 Zero to 20 V 1 0 A Load 1 Zero to 20 V 1 0 A Internal connections Internal connections Figure 11 Parallel Tracking Applications ...

Page 26: ...Reference 16 CPS250 User Manual ...

Page 27: ...and Conducted Emissions EN 50081 1 Emissions EN 60555 2 AC Power Line Harmonic Emissions EN 50082 1 Immunity IEC 801 2 Electrostatic Discharge Immunity IEC 801 3 RF Electromagnetic Field Immunity IEC 801 4 Electrical Fast Transient Burst Immunity IEC 801 5 Power Line Surge Immunity EC Declaration of Conformity Low Voltage Compliance was demonstrated to the following specification as listed in the ...

Page 28: ... 0 1 VDC at 2 0 A maximum Voltage 0 20 V 0 20 VDC at 0 5 A maximum Load Regulation 5 V 0 1 5 mV Load Regulation 0 20 V 0 01 3 mV Ripple Noise 2 m VRMS 5 Hz 1 MHz Tracking Error 0 2 20 mV Indicator Analog type front panel meter Meter Indicators 0 25 VDC 2 5 of full scale 0 600 mA 2 5 of full scale Table 6 Electrical Characteristics Line Voltage Range 90 to 110 108 to 132 198 to 242 and 216 to 250 V...

Page 29: ...e benzene toluene xylene acetone or similar solvents Do not use abrasive cleaners on any portion of the power supply Preparing for Shipment If the original packaging is unfit for use or not available use the following packaging guidelines 1 Use a corrugated cardboard shipping carton having inside dimensions at least three inches greater than the instrument dimensions 2 Put the instrument into a pl...

Page 30: ...is not the problem is in the 5 V supply Contact your nearest Tektronix service center for servicing 2 If all supplies are working and the power indicator is off contact your nearest Tektronix service center for servicing WARNING To prevent electrical shock unplug the power cord and disconnect the test leads from any circuit before checking or replacing the fuse 3 If none of the supplies are workin...

Page 31: ...Disconnect the CPS250 outputs from the circuit being tested Check A and B VOLTAGE and CURRENT controls 2 If the outputs are good check the circuit under test for a short or low resistance POWER Light ON but No Output from Any Supplies with Power Supply Not Connected to Circuit Contact your nearest Tektronix service center for servicing ...

Page 32: ...Appendix B Maintenance 22 CPS250 User Manual ...

Page 33: ...ly Table 7 Standard Accessories Accessory Tektronix Part Number Fuse 3AG 2A 250V SB 90 132 V Operation 159 0023 00 CPS250 User Manual 070 6740 XX 115V Power Cord Refer to Table 9 Lead Set 196 3384 XX Optional Accessories The following items are available as optional accessories Table 8 Optional Accessories Accessory Tektronix Part Number Fuse 3AG 1A 250V SB 198 250 V operation 159 0019 00 230V Pow...

Page 34: ... are available Table 9 Accessory Power Cords Plug Configuration Normal Usage Tektronix Part Number North America 115 V 161 0104 00 Europe 230 V 161 0104 06 United Kingdom 230 V 161 0104 07 Australia 230 V 161 0104 05 North America 230 V 161 0104 08 Switzerland 230 V 161 0167 00 ...

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