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PS2521G
User Manual
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Tektronix PS2520, PS2521, PS2520G, PS2521G User Manual

User Manual

PS2520, PS2520G, PS2521 & PS2521G Programmable Power Supplies
070-9196-01
Copyright T ektronix, Inc. 1995. All rights reserved. T ektronix products are covered by U.S. and foreign patents, issued and
pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved.
WARRANTY
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to 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 use or connection to incompatible equipment; or c) to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESSED OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
EC Declaration of Conformity
We
Tektronix Holland N.V. Marktweg 73A 8444 AB Heerenveen The Netherlands
declare under sole responsibility that the
PS2520G Programmable Power Supply
meets the intent of Directive 89/336/EEC for Electromagnetic Compatibility and Low Voltage Directive 73/23/ECC for Product Safety. Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities:
EMC Directive 89/336/EEC: EN 55011 Class B Radiated 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
“...conformity with the following standards:
following the provisions of the Directives of the Council of the European Union:
Low Voltage Directive 73/23/EEC: Amended by 93/68/EEC.”
EC Declaration of Conformity
We
Tektronix Holland N.V. Marktweg 73A 8444 AB Heerenveen The Netherlands
declare under sole responsibility that the
PS2521G Programmable Power Supply
meets the intent of Directive 89/336/EEC for Electromagnetic Compatibility and Low Voltage Directive 73/23/ECC for Product Safety. Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities:
EMC Directive 89/336/EEC: EN 55011 Class A Radiated 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
“...conformity with the following standards:
following the provisions of the Directives of the Council of the European Union:
Low Voltage Directive 73/23/EEC: Amended by 93/68/EEC.”

Table of Contents

General Safety Summary iii. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Description 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Procedure 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Basics 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Overview 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Making a Control Setting 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting the Output 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the Protection Levels 8. . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the OVP 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resetting the OVP 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the OCP 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting Voltage and Current Limits 9. . . . . . . . . . . . . . . . . . . . . .
Using the Keypad to Set Limits 9. . . . . . . . . . . . . . . . . . . . . .
Setting Voltage and Current Steps 10. . . . . . . . . . . . . . . . . . . .
Connecting the Outputs 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Referencing Outputs to Ground 11. . . . . . . . . . . . . . . . . . . . . .
Independent Operation 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Master/Slave Operation 18. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enabling the Outputs 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sensing the Output Level 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storing and Recalling Settings 21. . . . . . . . . . . . . . . . . . . . . . . . . .
Storing a Setting 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recalling an Individual Setting 22. . . . . . . . . . . . . . . . . . . . . .
Storing and Recalling a Sequence of Settings 22. . . . . . . . . . .
Setting the GPIB Address 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix A: Specifications 27. . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix B: Maintenance 31. . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix C: Replaceable Parts 37. . . . . . . . . . . . . . . . . . . . . . .
Index 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PS2520, PS2520G, PS2521 & PS2521G User Manual
i
T able of Contents

List of Figures

Figure 1: Changing the Line Voltage Setting 2. . . . . . . . . . . .
Figure 2: Replacing the Line Fuse 3. . . . . . . . . . . . . . . . . . . . .
Figure 3: Front Panel Features 5. . . . . . . . . . . . . . . . . . . . . . . .
Figure 4: Rear Panel Features 6. . . . . . . . . . . . . . . . . . . . . . . .
Figure 5: SHIFT control 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6: Isolated-Ground Connection 11. . . . . . . . . . . . . . . . .
Figure 7: Examples of Independent Output Connections 13. .
Figure 8: Connecting Power Supplies in Series 14. . . . . . . . . .
Figure 9: Examples of External Series Connections 15. . . . . .
Figure 10: Connecting Power Supplies in Parallel 16. . . . . . . .
Figure 11: Examples of External Parallel Connections 17. . . .
Figure 12: Series-Tracking Operation 19. . . . . . . . . . . . . . . . . .
Figure 13: Parallel-Tracking Operation 19. . . . . . . . . . . . . . . .
Figure 14: Output On/Off Button 20. . . . . . . . . . . . . . . . . . . . .
Figure 15: Connecting the Auxiliary Sense Inputs 21. . . . . . . .

List of Tables

Table 1: Maximum Output in Series and Para Modes 18. . . .
Table 2: Operating Characteristics 27. . . . . . . . . . . . . . . . . . . .
Table 3: Electrical Characteristics 29. . . . . . . . . . . . . . . . . . . .
Table 4: Environmental Characteristics 30. . . . . . . . . . . . . . . .
Table 5: Physical Characteristics 30. . . . . . . . . . . . . . . . . . . . .
Table 6: Troubleshooting Steps 33. . . . . . . . . . . . . . . . . . . . . . .
Table 7: Error Messages 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 8: Standard Accessories 37. . . . . . . . . . . . . . . . . . . . . . . .
Table 9: Optional Accessories 37. . . . . . . . . . . . . . . . . . . . . . . .
Table 10: Accessory Power Cords 38. . . . . . . . . . . . . . . . . . . . .
ii
PS2520, PS2520G, PS2521 & PS2521G User Manual

General Safety Summary

Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it.
Only qualified personnel should perform service procedures.

Injury Precautions

Use Proper Power Cord
T o avoid fire hazard, use only the power cord specified for this product.
Avoid Electric Overload
T o avoid electric shock or fire hazard, do 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. T o 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 Without Covers
T o avoid electric shock or fire hazard, do not operate this product with covers or panels removed.
Use Proper Fuse
T o avoid fire hazard, use only the fuse type and rating specified for this product.
PS2520, PS2520G, PS2521 & PS2521G User Manual
iii
General Safety Summary
Do Not Operate in Wet/Damp Conditions
T o avoid electric shock, do not operate this product in wet or damp conditions.
Do Not Operate in Explosive Atmosphere
T o avoid injury or fire hazard, do not operate this product in an explosive atmosphere.
Avoid Exposed Circuitry
T o avoid injury, remove jewelry such as rings, watches, and other metallic objects. Do not touch exposed connections and components when power is present.

Product Damage Precautions

Use Proper Power Source
Do not operate this product from a power source that applies more than the voltage specified.
Use Proper V oltage Setting
Before applying power, ensure that the line selector is in the proper position for the power source being used.
Provide Proper Ventilation
T o prevent product overheating, provide proper ventilation.
Do Not Operate With Suspected Failures
If you suspect there is damage to this product, have it inspected by qualified service personnel.
iv
PS2520, PS2520G, PS2521 & PS2521G User Manual

Safety Terms and Symbols

Terms in This Manual
These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property.
These terms may appear on the product:
General Safety Summary
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 product:
DANGER
High Voltage
Protective Ground
(Earth) T erminal
ATTENTION
Refer to
Manual
PS2520, PS2520G, PS2521 & PS2521G User Manual
Double
Insulated
v
General Safety Summary

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.
vi
PS2520, PS2520G, PS2521 & PS2521G User Manual

Preface

This manual provides installation and operating instructions for the PS2520, PS2520G, PS2521, and PS2521G Programmable Power Supplies. The manual is organized as follows:
H Getting Started lists the product features, and describes how to
H Operating Basics provides an overview of the front and rear
H The Appendices list product specifications and other reference
Refer to the PS2520G and PS2521G Programmer Manual (070-9197-XX) for information on how to set up and use the PS2520G and PS2521G Programmable Power Supplies over the IEEE-488 General Purpose Interface Bus (GPIB).
install the power supply.
panel and details each operating task step by step. This section
also provides a practical example of each control setting.
information.
PS2520, PS2520G, PS2521 & PS2521G User Manual
vii
Preface
viii
PS2520, PS2520G, PS2521 & PS2521G User Manual

Getting Started

This section describes the features of the PS2520, PS2520G, PS2521, and PS2521G Programmable Power Supplies.
Be sure to set up your power supply using the installation instruc­tions at the end of this section.

Product Description

The PS2520, PS2520G, PS2521, and PS2521G are programmable DC power supplies. All four power supplies have the following features:
H Three outputs allow independent, series, or parallel operation H Automatic series or parallel tracking H Easy to set, push-button controls H Data entry using the keypad, up/down keys H Four-digit displays for both voltage and current H Overvoltage and overcurrent protection H Display readouts for memory, output, and error code display H Precision digital-to-analog converter for high resolution H High stability, low drift output H Memory storage and recall H Automatic sequencing with timer H Diagnostic self-test at power on
In addition, the PS2520G and PS2521G power supplies include a GPIB interface that allows you to program and operate the power supply from a remote location over the General Purpose Interface Bus (GPIB).
For a complete list of specifications, refer to Appendix A: Specifica- tions on page 27.
PS2520, PS2520G, PS2521 & PS2521G User Manual
1
Getting Started

Installation

Use the following installation procedure to properly configure and turn on the power supply for the first time:
1. Check the line voltage setting on the rear panel. If the line
voltage setting does not match the line voltage of your area, change the line voltage setting as shown in Figure 1.
Pry open cover with
flat-blade screwdriver.
Figure 1: Changing the Line V oltage Setting
Remove cam drum,
rotate to correct
selection, and reinsert.
2
PS2520, PS2520G, PS2521 & PS2521G User Manual
Getting Started
CAUTION. To avoid damaging the instrument, make sure the line voltage setting and fuse type match the line voltage of your area.
2. Identify the fuse and replace it if necessary with the type
specified in Appendix C: Replaceable Parts on page 37. See
Figure 2 to replace the fuse.
Reinsert drawer and
close cover.
Pull fuse drawer out and
replace fuse.
Figure 2: Replacing the Line Fuse
3. Place the power supply on a level surface. Leave at least 10 cm
(4 in) clearance around the cabinet for cooling.
4. Connect the power cord to the connector on the rear of the power
supply and plug the other end into a wall receptacle.
PS2520, PS2520G, PS2521 & PS2521G User Manual
3
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