Tektronix PS2520 PS2520G PS2521 PS2521G User Manual
Contents
1. External Series Connections To achieve a potential across the load that exceeds the output of a single power supply connect two or more power supplies in series Figure 8 illustrates two independent power supplies connected in series Note that the voltages of the power supplies add together but the currents do not 20V 1A 15V 1A 35V 1A Figure 8 Connecting Power Supplies in Series the user Be careful when connecting power supplies in series to achieve voltages higher than 60 VDC total or 60 VDC between any connection and earth ground A WARNING Voltages more than 60 VDC are a lethal shock hazard to Refer to Figure 9 for examples of different types of series connec tions using the three outputs 14 PS2520 PS2520G PS2521 amp PS2521G User Manual Operating Basics Isolated ground OUTPUT 1 QUTPUT 2 QUTPUT 3 GND es Vota V1 V2 V3 Load Negative ground OUTPUT 1 OUTPUT 2 OUTPUT 3 OwO Q pr Viotal V2 V3 Load Positive ground OUTPUT 1 OUTPUT 2 OUTPUT 3 GND r pet ore et Load Vrotal V1 V2 V3 Figure 9 Examples of External Series Connections PS2520 PS2520G PS2521 amp PS2521G User Manual 15 Operating Basics External Parallel Connections To supply more current than any one supply can provide individually connect two or more power supplies in parallel Figure 10 illustrates two power supplies externally conne2. PS2520 PS2520G PS2521 amp PS2521G User Manual Operating Basics 3 Store this setting back into memory location 01 SHIFT STORE gt 1 gt return 4 Recall the settings in memory location 02 SHIFT RECALL gt 2 return 5 Set the delay time for memory location 02 DELAY gt 7 gt return 6 Store this setting back into memory location 02 SHIFT STORE gt 2 gt return 7 Specify the sequence to contain only locations 01 through 02 SHIFT RECALL gt 1 2 return 8 Set the power supply to automatically output and repeat this sequence starting with memory location 01 AUTO SEQ on gt OUTPUT oN The AUTO and OUT indicators appear and the sequence starts running Setting the GPIB Address If you have a PS2520G or PS2521G Programmable Power Supply use the ADDRESS LOCAL control to set or read the GPIB address of the power supply Refer to the PS2520G and PS2521G Program mer Manual for more details PS2520 PS2520G PS2521 amp PS2521G User Manual 25 Operating Basics 26 PS2520 PS2520G PS2521 amp PS2521G User Manual re a Appendix A Specifications Tables 2 through 5 list the specifications of the PS2520 PS2520G PS2521 and PS2521G Programmable Power Supplies Table 2 Operating Characteristics Name Characteristic Independent Output PS2520 and PS2520G Ratings two outputs 0 to 36 V 0 to 1 5 A and one output 0 to 6 V 3A PS2521 and PS2521G
3. 230V Power Cords Tektronix Part Number 159 0023 00 Refer to Table 10 PS2520 PS2520G PS2521 amp PS2521G User Manual 37 Appendix C Replaceable Parts The following power cords are available Table 10 Accessory Power Cords Tektronix Part Plug Configuration Normal Usage Number North America 161 0104 00 115V Europe 161 0104 06 230V United Kingdom 161 0104 07 230V Australia 161 0104 05 VA 230V North America 161 0104 08 230V Switzerland 161 0167 00 230V 38 PS2520 PS2520G PS2521 amp PS2521G User Manual Index A accessories optional 37 standard 37 amperes readout depicted 5 automatic tracking 18 C C C definition of 9 C V definition of 9 characteristics electrical 29 environmental 30 operating 27 physical 30 cleaning 31 connection external parallel 16 external series 14 ground referenced 11 isolated ground 11 parallel depicted 16 controls See also indicators ADDRESS 25 AUTO SEQ 25 CURRENT step 10 CURRENT SET 9 DELAY 24 entry sequence 6 front panel 5 keypad use of 9 LOCAL 25 OCP 8 OUTPUT 20 output selection 7 OVP RESET 8 OVP SET 8 power switch 5 rear panel 6 RECALL 22 RECALL LAST 22 24 RECALL NEXT 22 24 return key 6 sense selector 20 SHIFT 7 STEP SET 10 STORE 21 22 VOLTS step 10 VOLTS SET 9 cooling clearance 3 cooling fan depicted 6 current limit setting level of 9 CURRENT
4. two outputs 0 to 20 V 0 to 2 5 A one output 0 to 6 V 0 to 5 A Series Tracking Output PS2520 and PS2520G 0 to 72 V 0 to 1 5 A i hang PS2521 and PS2521G 0 to 40 V 0 to 2 5 A Parallel Tracking Output PS2520 and PS2520G 0 to 36 V 0 to 3 A Rati aung PS2521 and PS2521G 0 to 20 V 0 to 5 A Maximum OVP PS2520 and PS2520G 38 5 V on 36 V outputs 7 0 V on 6 V output PS2521 and PS2521G 22 5 V on 20 V outputs 7 0 V on 6 V output Load Effect Voltage lt 3 mV rear output lt 6 mV front output Current lt 3 mA lt 6 mA if rating current gt 3 5 A Source Effect Voltage lt 3 mV Current lt 3 mA Resolution Voltage 10 mV 20 mV if rating voltage gt 36 V Current 1 mA 2 mA if rating current gt 3 5 A OVP 10 mV 20 mV if rating voltage gt 36 V PS2520 PS2520G PS2521 amp PS2521G User Manual 27 Appendix A Specifications Table 2 Operating Characteristics Cont Name Program Accuracy 25 5 C Ripple and Noise 20 Hz to 20 MHz Temperature Coefficient 0 C to 40 C Characteristic Voltage lt 0 05 25 mV 50 mV if rating voltage gt 36 V Current lt 0 2 10 mA OVP lt 2 0 6V Voltage Ripple 1 MVays 3 MV p p Voltage Noise 2 MVR ms 30 MV p p Current lt 3 MAgms lt 5 MArRys if rating current gt 3 5 A Voltage lt 100 ppm 3 mV Current lt 150 ppm 3 mA Readback Resolution Voltage 10 mV 20 mV if rating voltage gt 36 V Curre
5. and close cover W lt gt 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 amp PS2521G User Manual 3 Getting Started 5 Turn the power on The display indicators will flash briefly The voltage and current readouts show the output settings You should also hear the cooling fan running whenever the power is on The power supply performs a diagnostic self test at power on If the diagnostic self test detects a problem the unit displays an error code number in the form Err xxx If you encounter an error code refer to Troubleshooting on page 32 General Procedure Use the following general procedure to connect one or more of the power supply outputs to a load This procedure allows you to use the power supply safely More information about each step is in Operating Basics on page 5 1 Turn the power supply off and remove any connections on the outputs Turn the power supply on Select the output you want to configure Refer to Selecting the Output on page 7 Set the protection levels for the selected output Refer to Setting the Protection Levels on page 8 Set the voltage and current l
6. current increases the amount of voltage drop across the output leads also increases In this case the internal sense connection does not accurately measure the voltage across the load To compensate for 20 PS2520 PS2520G PS2521 amp PS2521G User Manual Operating Basics SENSE REAR TERMINAL this problem the power supply has auxiliary sense inputs on the rear panel Using these inputs as illustrated in Figure 15 bypasses the voltage dropped across the output leads and senses the voltage directly across the load It is best to use a shielded two wire cable for this connection to prevent extraneous noise from affecting the sense measurement Remove shorting bars HO ro amp jJ ARR LED Connect sense inputs across load Figure 15 Connecting the Auxiliary Sense Inputs Storing and Recalling Settings The power supplies allow you to store voltage and current settings in as many as 50 different memory locations 00 49 Each location stores the settings for all three outputs You can recall the settings of any location individually or you can step through the settings for each memory location in sequence Storing a Setting The Store function saves the front panel settings for OVP voltage limit current limit and delay timer in a specific memory location The section that describes the delay tim
7. isolated ground connection when it is unnecessary or undesirable to connect one of the outputs to ground To reference an output connection to ground do one of the following m Connect the positive output to the ground terminal to supply a negative voltage across the load PS2520 PS2520G PS2521 amp PS2521G User Manual 11 Operating Basics m Connect the negative output to the ground terminal to supply a positive voltage across the load NOTE The ground post on the power supply internally connects to earth ground through the power supply chassis and line cord Independent Operation Independent operation allows you connect each of the three outputs to separate loads or to connect the outputs in series or in parallel with external connections When the outputs are in the independent mode of operation the SERIES and PARA indicators are not lighted See Figure 7 for examples of independent output connections 12 PS2520 PS2520G PS2521 amp PS2521G User Manual Operating Basics Isolated ground connections OUTPUT 1 OUTPUT 2 OUTPUT 3 GND Ua Load 1 Load 2 Load 3 Negative ground connections OUTPUT 1 OUTPUT 2 OUTPUT 3 GND n Hz Load 3 P ositive ground and negative ground connections OUTPUT 1 OUTPUT 2 OUTPUT 3 i V3 GND Figure 7 Examples of Independent Output Connections PS2520 PS2520G PS2521 amp PS2521G User Manual 13 Operating Basics
8. return to enter the current limit Example Set the voltage of Output 3 to 4 2 volts with a maximum current of 0 3 amperes 1 Select Output 3 SHIFT OUT3 2 Set the voltage level of the output to 4 2 V VOLTS SET gt 4 2 gt return 3 Set the current limit of the output to 0 3 A CURRENT SET gt 3 gt return The power supply keeps the voltage constant if the load does not require more than 0 3 amperes The power supply indicates C V on the display PS2520 PS2520G PS2521 amp PS2521G User Manual 9 Operating Basics 10 Once the load tries to draw more than 0 3 amperes however the supply holds the current to 0 3 amperes unless OCP is on and allows the voltage level to vary accordingly The power supply then indicates C C on the display Setting Voltage and Current Steps The CURRENT and VOLTS A step up and V step down arrow keys allow you to make minor adjustments to the current and voltage settings The STEP SET function determines the amount that the arrow keys increment or decrement the setting when you press them Press STEP SET VOLTS SET number gt return lt to set the amount of each voltage step increment and decrement Press STEP SET CURRENT SET gt number gt return to set the amount of each current step increment and decrement NOTE The power supplies permit voltage steps up to 2 000 V and current steps up to 0 200 A Example Set volta
9. steps setting 10 D data entry 6 data entry keypad depicted 5 diagnostics 4 dimensions physical 30 E error messages 34 F features front panel 5 product 1 rear panel 6 fuse replacement 3 PS2520 PS2520G PS2521 amp PS2521G User Manual 39 Index fuse access depicted 3 6 G GPIB connector depicted 6 GPIB option indicators AUTO 25 C C 9 C V 9 front panel depicted 5 GPIB status 5 OCP 8 OUT 7 25 output 5 PARA 19 SERIES 18 SHIFT 7 installation fuse 3 power cord 3 K keypad depicted 5 L line voltage selector depicted 2 6 maintenance 31 master slave operation 18 memory indicator depicted 5 memory locations recalling from 21 22 storing to 21 22 O OCP definition of 8 reset 8 setting level of 8 optional accessories 37 output enabling 20 rating 27 sensing level of 20 output connectors depicted 5 6 methods for connecting 11 output controls depicted 5 output modes independent 12 overcurrent protection setting level of 8 overvoltage protection setting level of 8 OVP definition 8 maximum level 27 reset 8 P para operation depicted 19 parallel tracking 19 power connector depicted 6 power cord installation 3 power switch depicted 5 procedure general operation 4 R recalling stored settings 22 40 PS2520 PS2520G PS2521 amp PS2521G User Manual Index repackagin
10. 3 Operating Basics 24 8 Recall the settings in memory locations 01 02 and 03 in that order SHIFT RECALL gt 1 gt return RECALL NEXT RECALL NEXT Pressing RECALL NEXT recalls the next memory location in the sequence RECALL LAST recalls the previous memory location Automatic Sequencing To automatically output a sequence of stored settings you must store the delay time along with the other settings for each memory location The minimum delay time setting is 1 second the maximum is 65535 seconds 1 Press DELAY seconds gt return to specify the delay time for a sequence step 2 Press SHIFT STORE memory location number gt return lt to store a setting 3 Repeat steps and 2 for each new setting using a consecutive memory location for each setting 4 Press SHIFT RECALL gt first memory location gt decimal point last memory location gt return to specify the first through last memory locations in the sequence 5 Press AUTO SEQ on gt OUTPUT ON to automatically output the settings in sequence Example Recall the previously stored memory locations 01 and 02 and set the delay times for each as follows 01 3 seconds 02 7 seconds Set the test loop for memory locations 01 and 02 1 Recall the settings in memory location 01 SHIFT RECALL gt 1 gt return 2 Set the delay time to 3 seconds DELAY gt 3 gt return
11. User Manual Tektronix PS2520 PS2520G PS2521 amp PS2521G Programmable Power Supplies 070 9196 01 Copyright O Tektronix Inc 1995 All rights reserved Tektronix 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 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 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
12. aster Slave Operation 0 2 eee eee ee res 18 Enabling the Outputs 00 eee eee ee eee 20 Sensing the Output Level 0 0 00 eee eee eee 20 Storing and Recalling Settings 000005 21 Storing a Setting 0 2 0 0 ccc eee 21 Recalling an Individual Setting 22 Storing and Recalling a Sequence of Settings 22 Setting the GPIB Address 0 cee eee eee 25 Appendix A Specifications 0 ccc cece ween eee 27 Appendix B Maintenance ssesssessesosrt 31 Appendix C Replaceable Parts 0eeeeeee 37 Mde asnos ea SUB T EEN bs Ses lS Saale Sasa eres 39 PS2520 PS2520G PS2521 amp PS2521G User Manual i Table of Contents List of Figures Figure 1 Changing the Line Voltage Setting Figure 2 Replacing the Line Fuse seossc rt Figure 3 Front Panel Features 00e 00005 Figure 4 Rear Panel Features 0 ee ee0e Figure 5 SHIFT control 0 cece eee eee eee Figure 6 Isolated Ground Connection 1 JN mM WwW WN 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 Ope
13. cted in parallel Note that the currents add together but the voltages do not For this example the power supplies are set to independent and the SERIES and PARA indicators are not lighted 20V 1A 20V 1A 20V 2A Figure 10 Connecting Power Supplies in Parallel supply do not apply a voltage across an output that exceeds the A CAUTION To avoid damaging the output circuitry of the power voltage rating of that output Refer to Figure 11 for examples of different types of parallel connections using the three outputs 16 PS2520 PS2520G PS2521 amp PS2521G User Manual Operating Basics Isolated ground OUTPUT 1 OUTPUT 2 OUTPUT 3 z GND ET i fou lt Imaximum l1Max l2Max 3max Load Negative ground OUTPUT 1 OUTPUT 2 OUTPUT 3 GND Ez xO lt l Maximum l2Max 3max Load P ositive ground OUTPUT 1 OUTPUT 2 OUTPUT 3 GND 4 hd bd N P lt lMaximum l1Max l2 Load Figure 11 Examples of External Parallel Connections PS2520 PS2520G PS2521 amp PS2521G User Manual 17 Operating Basics Master Slave Operation The SERIES and PARA controls on the front panel allow you to internally connect Output 1 and Output 2 in series or parallel When you do this Output 2 the master output sets Output the slave output to the same level as the Output 2 setting These modes of operation are also called serie
14. er operation begins on page 24 Press SHIFT STORE memory location number gt return to store the settings in memory PS2520 PS2520G PS2521 amp PS2521G User Manual 21 Operating Basics 22 Example Store the power supply settings for all three outputs in memory location 01 SHIFT STORE gt 1 gt return Recalling an Individual Setting The Recall function recalls the settings stored in a specific memory location Press SHIFT RECALL memory location number gt return to recall a particular setting from memory Example Recall the settings for all three outputs from memory location 01 SHIFT RECALL gt 1 gt return Storing and Recalling a Sequence of Settings To create an automatic test routine you can program the power supply to sequence through the settings stored in two or more consecutive memory locations You can recall the sequence of stored settings either manually or automatically Manual Sequencing Manual sequencing allows you to step through the stored settings one at a time by pressing the RECALL NEXT or RECALL LAST buttons 1 Press SHIFT STORE memory location number gt return to store a setting Repeat for each new setting using a consecutive memory location for each setting 2 Press SHIFT RECALL first memory location gt decimal point last memory location gt return to specify the first through last memo
15. error code display m Precision digital to analog converter for high resolution m High stability low drift output m Memory storage and recall m Automatic sequencing with timer m 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 amp 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 Remove cam drum Pry open cover with rotate to correct flat blade screwdriver selection and reinsert Figure 1 Changing the Line Voltage Setting 2 PS2520 PS2520G PS2521 amp PS2521G User Manual Getting Started f 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
16. g 32 replaceable parts 37 S selector line voltage 2 sense inputs depicted 6 sense selector depicted 6 sensing output level procedure for 20 sequence RECALL 22 STORE 22 sequencing automatic 24 series tracking 18 shipment repackaging for 32 specifications 27 standard accessories 37 status indicators depicted 5 STEP SET function procedure for 10 storing a sequence 22 storing instrument settings 21 T telephone numbers TEK WIDE 31 32 tracking automatic 18 troubleshooting 32 V voltage setting limit of 9 VOLTS readout depicted 5 VOLTS steps setting 10 W warranty service 31 weight 30 PS2520 PS2520G PS2521 amp PS2521G User Manual 41 Index 42 PS2520 PS2520G PS2521 amp PS2521G User Manual
17. ge steps to 0 5 V and current steps to 0 1 A 1 Set voltage steps to 0 5 V STEP SET VOLTS SET 5 gt return 2 Set current steps to 0 1 A STEP SET gt CURRENT SET gt 1 gt return lt 4 Press VOLTS A to increase and press VOLTS W to decrease the voltage limit by steps of 0 5 V Press CURRENT A to increase and press CURRENT VY to decrease the current limit by steps of 0 1 A Press and hold the arrow key to increase the selection speed PS2520 PS2520G PS2521 amp PS2521G User Manual Operating Basics Connecting the Outputs After setting the voltage and current limits turn the power off and connect the outputs to one or more loads The binding posts on the front outputs accept wires spade lugs or banana plugs The rear output terminals provide additional output connections You can make connections with or without reference to ground to each supply independently in series or in parallel WARNING To avoid electrical shock and damage to circuits connected to the outputs make sure that you turn the power supply off before making or changing output connections Referencing Outputs to Ground There are two types of power supply connections in relation to ground isolated ground or ground referenced Figure 6 shows both types of connections Voltage Voltage Voltage b Om a O D Isolated ground Ground referenced Figure 6 Isolated Ground Connection Use an
18. he shift indicator appears and remains active until you enter the function Example Reset the OVP SHIFT OVP RESET SHIFT Figure 5 SHIFT control Selecting the Output You must select the output before you can set the voltage current and protection levels for that output Press SHIFT OUT n to select the output Example Select Output 2 SHIFT OUT2 The output indicator for Output 2 lights and you can set the output levels PS2520 PS2520G PS2521 amp PS2521G User Manual 7 Operating Basics Setting the Protection Levels AN The OVP overvoltage protection and OCP overcurrent protection settings protect against supplying excessive voltage or current to an output load If voltage or current reaches the protection level setting the power supply disables the outputs CAUTION To prevent damaging a circuit under test set protection levels before you apply power to the circuit Setting the OVP The OVP overvoltage protection circuit automatically disables the output when the voltage on the output reaches the set level Press OVP SET number return to enter the OVP level Example Set the overvoltage protection for Output 1 to 6 volts 1 SHIFT OUT1 2 OVP SET gt 6 gt return Pressing the OVP SET again momentarily displays the OVP level and allows you to confirm the setting Resetting the OVP Using the previous example if the Output 1 voltage reaches 6 v
19. ice personnel PS2520 PS2520G PS2521 amp PS2521G User Manual General Safety Summary Safety Terms and Symbols gt gt 7 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 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 product A m DANGER Protective Ground ATTENTION Double High Voltage Earth Terminal Refer to Insulated Manual PS2520 PS2520G PS2521 amp PS2521G User Manual v General Safety Summary Certifications and Compliances vi 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 PS2520 PS2520G PS2521 amp PS2521G User Manual rn ee Preface This manual provides installation and operating instructions for the PS2520 PS2520G PS2521 and PS2521G Programmable Power Supp
20. imit for the selected output Refer to Setting Voltage and Current Limits on page 9 Repeat steps 3 through 5 for the remaining outputs 7 Turn the power supply supply off 9 Connect the output s to the load s Refer to Connecting the Outputs on page 11 Turn the power supply on 10 Enable the outputs Refer to Enabling the Outputs on page 20 PS2520 PS2520G PS2521 amp PS2521G User Manual ry nn Operating Basics This section describes how to use the front panel controls and how to make connections to the power supply Functional Overview Figure 3 illustrates the front panel features of the PS2520 PS2520G PS2521 and PS2521G Programmable Power Supplies Amperes Volts Memory readout readout PS2521G Power Supply FE CURRENT A VOLTS paorecrionseset OVP RESET SERIES INDEP STORE court OUT2 OUTPUT omama ore oew Fear ER CAS omore POWER ADDRESS PARA INDEP RECALL OUT3 SHIFT m ON Poe roca oworr RECA aca SUS ower od rese ses oe SETBUTTON by OUTPUT 1 OUTPUT 2 Oe op 0 20v 0 20 C a O C G O Oa SLAVE AS Power Output Output switch connectors controls Figure 3 Front Panel Features PS2520 PS2520G PS2521 amp PS2521G User Manual 5 Operating Basics Figure 4 illustrates the rear panel features Sense Power output and sense Fuse se
21. in parallel is twice that of the Output 2 setting See Figure 13 GND r Slave 3 O G Master t _ Internal connection one Viotal VMaster lt IMaximum IMaster X 2 Figure 13 Parallel Tracking Operation PS2520 PS2520G PS2521 amp PS2521G User Manual 19 Operating Basics Enabling the Outputs Press the OUTPUT ON OFF button Figure 14 to enable the power to all outputs Press to enable power to the outputs ROERE OVP RESET SERIES INDEP STORE OUT1 OUT2 OUTPUT OCP RECALL URREN VOLTS PROTECTION Aor paw ER Guren vars oworr ADDRESS PARA INDEP RECALL OUT3 SHIFT f LocaL ON OFF inea CURREND VOLTS onoff TO ADJUST STEP INCREMENT 7 AUTO SEQ USE STEP SET BUTTON OUTPUT 1 OUTPUT 2 ae miia 0 20v 0 20v 0 O ae C eo oe O CS SLAVE MASTER Figure 14 Output On Off Button The OUT indicator appears and all outputs are active Press the OUTPUT ON OFF button again to disable the outputs and remove power from the load or loads connected to the output terminals Sensing the Output Level Although the front and rear output terminals simultaneously supply power the power supply senses the voltage level internally from either the front or rear terminals Use the SENSE selector located on the rear panel to select the appropriate sense input See Figure 15 As the length of the output leads or the amount of output
22. instrument on all sides with 8 cm 3 in of padding material or urethane foam tightly packed between the carton and the instrument Seal the shipping carton with an industrial stapler or strapping tape Call your local Tektronix office for shipping instructions If you are within the continental U S you may call 1 800 TEK WIDE 1 800 835 9433 for assistance Troubleshooting If the power supply does not function properly refer to Table 6 to eliminate operating faults 32 PS2520 PS2520G PS2521 amp PS2521G User Manual Appendix B Maintenance setting WARNING To prevent electrical shock unplug the power cord and disconnect the outputs before changing the line fuse or line voltage Table 6 Troubleshooting Steps Symptom Supply does not power on No output or incorrect output Error Message Err Possible Causes Power cord not connected properly check connections Line voltage selection not correct check setting Fuse blown disconnect line cord and see page 2 to open cover and replace fuse Use the proper fuse for the line voltage setting See page 37 for fuse part numbers Leads not properly connected to the positive and negative outputs The output is not enabled OUT indicator is not lighted press the OUTPUT button The power supply settings are not appropriate for the output load The power supply is functioning normally by limiting either current or v
23. lector input connectors access L N OUTPUT I OUTPUT 2 OUTPUT 3 kekrek FEER FUSE RATING 100V 190V sBaa 220V 2aov SBA s GPIB E1 CO DTO DC1 PPO RL1 SRI L4 T6 AH1 amp SH1 O WATTS 120Vac VA HZ GPIB Cooling Line voltage Power interf ace fan setting connector PS2520G and PS2521G only Figure 4 Rear Panel Features Making a Control Setting The front panel controls allow you to set or program the amount of voltage current and protection for each output To make a control setting you must press specific control buttons in the correct sequence To enter a number for example you must select the function enter the number and then press return This manual presents an entry sequence of this type in the following form Press function number return 6 PS2520 PS2520G PS2521 amp PS2521G User Manual Operating Basics Items that compose the sequence appear in order from left to right with arrows separating each item An example follows each sequence string to help reinforce your understanding Examples look like this Example Set the voltage to 2 34 volts VOLTS SET gt 2 34 gt return To select functions that have nomenclature above the output control buttons you must first press the SHIFT button see Figure 5 T
24. lies The manual is organized as follows m Getting Started lists the product features and describes how to install the power supply m Operating Basics provides an overview of the front and rear panel and details each operating task step by step This section also provides a practical example of each control setting m The Appendices list product specifications and other reference information 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 PS2520 PS2520G PS2521 amp PS2521G User Manual vii Preface viii PS2520 PS2520G PS2521 amp PS2521G User Manual BREV aS 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 instruc tions 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 m Three outputs allow independent series or parallel operation m Automatic series or parallel tracking m Easy to set push button controls m Data entry using the keypad up down keys m Four digit displays for both voltage and current m Overvoltage and overcurrent protection m Display readouts for memory output and
25. mup Table 3 Electrical Characteristics Name Power Source Description 100 120 and 220 VAC 10 50 60 Hz 240 VAC 10 4 2 50 60 Hz ETL listed to UL 1244 Certified to CSA C22 2 No 231 M89 Safety PS2520 PS2520G PS2521 amp PS2521G User Manual 29 Appendix A Specifications Table 4 Environmental Characteristics Name Storage Temperature Operating Temperature Description 10 C to 70 C 14 F to 158 F 0 C to 40 C 32 F to 104 F Table 5 Physical Characteristics Name Overall Dimensions Weight 30 Description Width 255 mm 10 0 in Height 145 mm 5 7 in Depth 346 mm 13 6 in 10 kg 22 Ibs PS2520 PS2520G PS2521 amp PS2521G User Manual S n Appendix B Maintenance This appendix provides information for the basic maintenance of the power supply Electronic maintenance on the power supply must be performed by a trained technician However an operator can perform some basic and routine maintenance Cleaning To clean the power supply use a soft cloth dampened in a solution of mild detergent and water Do not spray cleaner directly onto the instrument since it may leak into the cabinet and cause damage Do not use chemicals containing benzine benzene toluene xylene acetone or similar solvents Do not use abrasive cleaners on any portion of the frequency counter Warranty Service The power supplies are covered by a standard Tektroni
26. nity IEC 801 2 Electrostatic Discharge Immunity TEC 801 3 RF Electromagnetic Field Immunity TEC 801 4 Electrical Fast Transient Burst Immunity TEC 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 a eee 2 Table of Contents General Safety Summary sssessscsceceerrrs iii Pretace sous Soi teins Soe ttn bl AE enes vii Getting Started 20 ccc ccc ccc ce cee ce eee ee eens 1 Product Description 0000 c eee eee tre sa 1 Installation sy dae ek ae Ae gets aot 2 General Procedure 0 0 EE eee 4 Operating Basics is sssi srne ente cee cece cece eees 5 Functional Overview 0 cece eee ene 5 Making a Control Setting 0 0 cee eee eee ee eee 6 Selecting the Output 0 cee eee eee eee 7 Setting the Protection Levels 00000 eeeeee 8 Setting the OVP 0 0 cece E eee 8 Resetting the OVP 0 eee eee ee eee 8 Setting the OCP 0 e E eee 8 Setting Voltage and Current Limits 9 Using the Keypad to Set Limits 9 Setting Voltage and Current Steps 10 Connecting the Outputs 2 0 00 cece eee 11 Referencing Outputs to Ground 11 Independent Operation sssessererrrerr eee eee rea 12 M
27. nt 1 mA 2 mA if rating current gt 3 5 A Readback Accuracy 255 C Voltage lt 0 05 25 mV 50 mV if rating voltage gt 36 V Current lt 0 2 10 mA Response Time Readback Temperature Coefficient Drift Series Tracking tracking error load effect source effect 10 to 90 up lt 100 ms 90 to 10 down lt 100 ms gt 10 rating load Voltage lt 100 ppm 10 mV 20 mV if rating voltage gt 36 V Current lt 150 ppm 10 mA Voltage lt 0 03 6 mV Current lt 0 1 6 mA Voltage lt 0 1 50 mV Voltage lt 50 mV Voltage lt 3 mV PS2520 PS2520G PS2521 amp PS2521G User Manual Appendix A Specifications Table 2 Operating Characteristics Cont Name Characteristic Parallel Tracking program accuracy Voltage lt 0 05 25 mV 25 5 C 50 mV if rating voltage gt 36 V Current lt 0 2 20 mA OVP lt 2 0 6V load effect Voltage lt 3 mV rear output lt 6 mV front output Current lt 6 mA lt 12 mA if rating current gt 3 5 A source effect Voltage lt 3 mV Current lt 6 mA SH1 AH1 T6 L4 SR1 RL1 PPO DC1 DTO CO El GPIB Capability IEEE 488 2 optional Memory Locations Store and Recall 00 49 50 locations Timer Setting Time 1 to 65535 seconds Resolution 1 second 1 Change in output over an 8 hour interval under constant line load and ambient temperature following a 30 minute war
28. oltage Check load or disconnect output to verify Setup error check error number against error description in Table 7 on page 34 Overvoltage protection tripped correct the cause and clear error OVP RESET Set overvoltage protection to a higher value if necessary Overcurrent protection tripped correct the cause and clear the error OCP OFF The power supply indicates an error in setup or operation by displaying the message Err xxx on the front panel Table 7 lists each message number and explains what the error code means PS2520 PS2520G PS2521 amp PS2521G User Manual 33 Appendix B Maintenance Table 7 Error Messages Front Panel Error Code Description 0 No error 001 Self test failed CPU test error 002 Self test failed RAM test error 003 Self test failed ROM test error 005 Self test failed DAC ADC test error 012 Device specific error Overcurrent protection error 013 Device specific error Overvoltage protection error 016 Data out of range Voltage too large 017 Data out of range Current too large 018 Data out of range Voltage too small 019 Data out of range Current too small 064 Setting conflict Timer setting error 065 Setting conflict Overvoltage protection setting error 066 Setting conflict Address setting error 067 Setting conflict V
29. oltage setting error 068 Setting conflict Current setting error 069 Setting conflict Recall setting error 070 Setting conflict Store setting error 091 Device specific error Calibration current full scale error 092 Device specific error Calibration voltage full scale error 34 PS2520 PS2520G PS2521 amp PS2521G User Manual Appendix B Maintenance Table 7 Error Messages Cont Front Panel Error Code Description 093 Device specific error Calibration overvoltage protection full scale error 094 Device specific error Calibration overvoltage protection offset error PS2520 PS2520G PS2521 amp PS2521G User Manual 35 Appendix B Maintenance 36 PS2520 PS2520G PS2521 amp PS2521G User Manual Appendix C Replaceable Parts Replaceable parts may be ordered directly from your authorized Tektronix dealer Standard Accessories The items listed in Table 8 are shipped with the power supply Table 8 Standard Accessories Accessory Tektronix Part Number Fuse 3AG 4A 250V SB 159 0149 00 90 132 V operation User Manual 070 9196 XX Programmer Manual PS2520G and 070 9197 XX PS2521G only Three sets of test leads 196 3384 XX 115V Power Cord Refer to Table 10 Optional Accessories The items listed in Table 9 are available as optional accessories Table 9 Optional Accessories Accessory Fuse 3AG 2A 250V SB 198 250 V operation
30. olts the power supply automatically disables the output and displays the message Err 013 To reset the OVP correct the condition causing the overvoltage and press SHIFT gt OVP RESET Setting the OCP Pressing OCP ON overcurrent protection on sets the power supply to automatically disable the outputs upon reaching the current limit The OCP indicator appears on the display when the OCP is on PS2520 PS2520G PS2521 amp PS2521G User Manual Operating Basics When the OCP circuit disables the output it displays the message Err 012 When this happens correct the setup and remove the error message by toggling OCP off and then on again When the OCP is not on the power supply still limits the current to the set level and reduces the voltage as necessary to control the power Refer to the following section for instructions on how to set the current limit Setting Voltage and Current Limits The power supplies provide either constant voltage or constant current to a load The voltage limit current limit and the size of the load connected to the output determines whether the power supply holds the voltage constant or the current constant The appropriate indicator appears on the display to indicate whether constant voltage C V or constant current C C is active Using the Keypad to Set Limits Press VOLTS SET number return to enter the voltage limit Press CURRENT SET number
31. ration 19 Figure 13 Parallel Tracking Operation 19 Figure 14 Output On Off Button 6 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 685 27 Table 3 Electrical Characteristics 20685 29 Table 4 Environmental Characteristics 30 Table 5 Physical Characteristics 0000005 30 Table 6 Troubleshooting Steps cece eeeeee 33 Table 7 Error Messages ccceccccecccceces 34 Table 8 Standard Accessories eeeeeeeeee 37 Table 9 Optional Accessories cece cece eens 37 Table 10 Accessory Power Cords eeeeeees 38 ii PS2520 PS2520G PS2521 amp PS2521G User Manual a SEEDEDE 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 To avoid fire hazard use only the power cord specified for this product Avoid Electric Overload To 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 To a
32. 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 Tektronix Holland N V Marktweg 73A 8444 AB Heerenveen The Netherlands declare
33. ry locations in the sequence 3 Press RECALL NEXT to recall the next memory location in the sequence Press RECALL LAST to recall the previous memory location in the sequence PS2520 PS2520G PS2521 amp PS2521G User Manual Operating Basics Example Store three new settings for Output 1 and manually recall the settings in sequence Store 1 V 0 1 A in memory location 01 Store 2 V 0 15 A in memory location 02 Store 3 V 0 15 A in memory location 03 Recall the settings of each memory location in order 01 03 Select Output 1 SHIFT OUT1 Set the voltage limit to 1 V and the current limit to 0 1 A VOLTS SET gt 1 gt return CURRENT SET gt 1 gt return Store this setting in memory location 01 SHIFT STORE gt 1 gt return Set the voltage limit to 2 V and the current limit to 0 15 A VOLTS SET gt 2 gt return CURRENT SET gt 15 gt return Store this setting in memory location 02 SHIFT STORE gt 2 gt return Store 3 V 0 15 A in memory location 03 VOLTS SET gt 3 gt return SHIFT STORE gt 3 gt return Note the current limit setting for location 03 is the same as location 02 therefore you do not have to re enter the current limit setting Set the sequence for memory locations 01 through 03 SHIFT RECALL gt 1 3 return lt 4 PS2520 PS2520G PS2521 amp PS2521G User Manual 2
34. s tracking and parallel tracking Output 3 is always independent You can connect Output 3 in series or parallel with the other outputs by using external connections only Table 1 shows the maximum output available for the power supplies in SERIES and PARA operation Table 1 Maximum Output in Series and Para Modes PS2520 PS2520G 40 V 2 5 A 20V 5A PS 2521 PS2521G 72V 15A 36V 3A Series Tracking Select SERIES to internally connect Output 1 and Output 2 in series Output 2 is the master Press SHIFT SERIES The SERIES indicator lights Use the Output 2 settings to control the power to the load The Output 2 voltage setting should be one half of the total output voltage desired The voltage across Output 1 and Output 2 in series is twice that of Output 2 The current setting for Output 2 controls the maximum current available to the load See Figure 12 18 PS2520 PS2520G PS2521 amp PS2521G User Manual Operating Basics GND 3 O C Master Slave C VTotal VMaster X 2 lt Maximum Master Figure 12 Series Tracking Operation Parallel Tracking Select PARA to internally connect Output 1 and Output 2 in parallel Output 2 is the master Press SHIFT gt PARA The PARA indicator lights Use the Output 2 settings to control the power to the load The voltage across Output and Output 2 in parallel is the same as the Output 2 setting The current available from Output 1 and Output 2
35. 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 TEC 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 Immu
36. void 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 To avoid electric shock or fire hazard do not operate this product with covers or panels removed Use Proper Fuse To avoid fire hazard use only the fuse type and rating specified for this product PS2520 PS2520G PS2521 amp PS2521G User Manual iii General Safety Summary Do Not Operate in Wet Damp Conditions To avoid electric shock do not operate this product in wet or damp conditions Do Not Operate in Explosive Atmosphere To avoid injury or fire hazard do not operate this product in an explosive atmosphere Avoid Exposed Circuitry To 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 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 If you suspect there is damage to this product have it inspected by qualified serv
37. x one year warranty The warranty statement appears at the front of this manual If the power supply fails during the warranty period return it to Tektronix for free servicing subject to conditions of the warranty statement To arrange for warranty service or to get an estimate on a product that is out of warranty call your local Tektronix office If you are within the continental U S you may call 1 800 TEK WIDE 1 800 835 9433 for assistance When you call have the serial number of the power supply available The serial number is located on the left side of the rear panel PS2520 PS2520G PS2521 amp PS2521G User Manual 31 Appendix B Maintenance Repackaging for Shipment If your instrument must be returned for servicing use the original packing materials if possible If the original materials are unfit or unavailable repackage the power supply in the following manner 1 Use a sturdy shipping carton made of corrugated cardboard that has an interior size of at least 15 cm 6 in greater than the instrument size in all directions Enclose the following information m Owner s name and address m Name and phone number of a person that Tektronix should contact Serial number of the instrument m Description of the problem Completely wrap the power supply with polyethylene sheeting or equivalent material to protect the outside finish and keep harmful substances out of the power supply Cushion the
Download Pdf Manuals
Related Search