Manual - TMG Test Equipment
Contents
1. Load 2 Load 1 0 to 60 V 5V Figure 9 Independent Positive Stacked Application 18 To test a circuit in the independently stacked mode follow these steps 1 2 3 Turn the POWER off to the PS280 or PS283 Connect the outputs as shown in Figure 9 Set both variable supply VOLTAGE controls to the minimum setting Set both variable supply CURRENT controls to midrange Turn on the POWER to the PS280 or PS283 Set the desired voltage Observe the LED display the total output is the sum of both voltage readings Turn the POWER off to the PS280 or PS283 again Connect the device or devices to be tested 9 Turn on the POWER to the PS280 or PS283 again If necessary readjust the voltages PS280 amp PS283 User Manual Reference Figure 10 shows a stacked application in which you have a 0 to 60 V output from the variable power supplies and a 5 V output from the FIXED power supply SLAVE MASTER GND GND 5V FIXED 3A 7 G Load 2 Load 1 0 to 60 V HV Figure 10 Independent Negative Stacked Application PS280 amp PS283 User Manual Reference 20 Tracking Modes There are two tracking modes in which you can operate the PS280 or PS283 series and parallel Series In series mode the positive output terminal of the master variable power su2. 20 VOLTAGE Knob Allows you to set the output voltage for the right variable power supply If the instrument is in a tracking mode the right power supply is the master and the VOLTAGE knob affects both variable power supplies 21 Output Terminals These terminals for the 5 V FIXED power supply allow you to plug in the test leads as follows m The red terminal on the right is the positive polarity output terminal m The black terminal on the left is the negative polarity output terminal 22 The overload indicator lights when the current on the 5 V FIXED power supply becomes too large PS280 amp PS283 User Manual 7 Getting Started Turning On the Instrument After you have ensured that the PS280 or PS283 is set up for the proper line voltage and has the proper fuse refer to Preparing the Power Supply for Use on page 2 you are ready to turn it on CAUTION To avoid damaging the PS280 or PS283 do not use it VAN when the ambient air temperature exceeds 40 C Also allow adequate space at the rear of the instrument to permit the heat sink to radiate heat 1 Ensure that the POWER button is disengaged out and that the instrument is turned off 2 Plug the power cord into an appropriate power source 3 Turn both VOLTAGE knobs counterclockwise to the minimum setting 4 Press the POWER button The LED displays light up 8 PS280 amp PS283 User Manual Reference This section tells how to set the
3. 3 Rotate the VOLTAGE knob away from zero sufficiently to light the C C indicator 4 Set the meter selection switch to AMPS so that the LED display shows the current 5 Adjust the CURRENT knob for the desired current limit 6 Read the value shown on the LED display This is your preset current limit Do not increase the current control setting 7 Remove the short between the positive and negative output terminals You are now ready to power your device Test Modes The two variable power supplies on your PS280 or PS283 can be operated independently of each other or the slave supply can track the master supply Below are instructions for operating the instrument in independent modes followed by instructions for operating the instrument in series or parallel tracking modes Independent Modes In independent mode any one output of each power supply can be connected to any one terminal of another supply or to ground The variable supplies are independently controlled by the front panel VOLTAGE and CURRENT control knobs There are three independent modes in which you can operate the PS280 or PS283 floating ground referenced and stacked In floating mode the power supply is not referenced with respect to ground In ground referenced mode one of the output terminals is grounded providing a fixed reference point for your measurement PS280 amp PS283 User Manual 11 Reference In stacked mode you connect th
4. Green is life ABN 43 064 478 842 m 231 osborne avenue clayton south vic 3169 PO box 1548 clayton south vic 3169 t 03 9265 7400 f 03 9558 0875 J freecall 1800 680 680 www tmgtestequipment com au Test amp Complimentary Reference Material Measurement This PDF has been made available as a complimentary service for you to assist in 6 sales evaluating this model for your testing requirements e rentals TMG offers a wide range of test equipment solutions from renting short to long term buying refurbished and purchasing new Financing options such as Financial Rental and Leasing are also available on application calibration repair disposal TMG will assist if you are unsure whether this model will suit your requirements Call TMG if you need to organise repair and or calibrate your unit If you click on the Click to Call logo below you can all us for FREE TMG Corporate Website TMG Products Website e Leuel4 Disposal ainiti Click to Call TMG Now Review amp Level 5 Level 3 KE Renew Review amp Renew epair Level2 KE MK Calibration Recycled Level ET Acquisition l Purchase ara Lease Rent Solution Centre Product Lifecycle Management System Disclaimer All trademarks appearing within this PDF are trademarks of their respective owners A uv A e V Ww NAY Form 080 01 lt lt User Manual Tektronix PS280 amp PS283 DC Power Suppli
5. PS280 or PS283 current limit It also explains the constant voltage constant current crossover characteris tic of the instrument Finally the section includes procedures for using the instrument in both independent and tracking modes and provides examples of a variety of applications Constant Voltage Constant Current Crossover The PS280 or PS283 DC Power Supply features a constant voltage constant current automatic crossover This feature permits continuous operation in the transition from constant voltage mode to constant current mode as the load changes The intersection of the constant current and constant voltage modes is called the crossover point Figure 3 on page 10 shows the relationship between the load and the crossover point For example if the load is such that the power supply is operating in constant voltage mode the PS280 or PS283 provides a regulated output voltage The output voltage remains constant as the load increases until the preset current limit is reached Then the crossover occurs At that point the output current becomes constant and the output voltage drops in proportion to further load increases Crossover is indicated by the front panel red C C and green C V indicator lights If the C V indicator is lighted the instrument is operating in constant voltage mode If the C C indicator is lighted the instrument is operating in constant current mode Crossover from the constant current mode to the constant
6. 5280 0 to 2 A P5280 5V 0 to 1 A PS283 0 to 1 A PS283 3A Figure 5 Independent Common Ground Referenced Application 14 In this configuration each of the variable power supplies can be varied from 5 V to 25 V 30 V overall The GND post becomes the relative negative terminal for both variable outputs Because the variable power supplies are referenced to 5 V the LED display when set to display volts shows a value that is five volts lower than the actual output For example the LED display indicates m OV when the output is 5 V m 5 V when the output is 0 V m 30 V when the output is 25 V Negative 5 V is available between GND and the negative terminal of the FIXED 5 V power supply To test a circuit in the independently ground referenced mode follow these steps 1 Turn the POWER off to the PS280 or PS283 2 Connect the outputs as shown in Figure 5 3 Set both variable supply VOLTAGE controls to the minimum setting PS280 amp PS283 User Manual Reference 4 Set both variable supply CURRENT controls to midrange 5 Set the AMPS VOLTS switches for both power supplies to display volts 6 Turn on the POWER to the PS280 or PS283 The display should read 0 V for both variable power supplies An external meter connected across the load or load terminals should read 5 V 7 Turn the POWER off to the PS280 or PS283 again 8 Connect the device or devices to
7. V 0 60 V single series tracking supply Load Regulation CC lt 0 2 3 mA Ripple Noise 5 V lt 2 mV ms Ripple Noise CV lt 1 mV rms 5 Hz 1 MHz Ripple CC lt 3 mA ms Temperature Coefficient CV lt 300 ppm C Recovery Time CV lt 100 us time to recover after a 50 load change with 0 5 A minimum Tracking Error Slave lt 0 5 10 mV of the master supply Indicator Two 3 1 2 digit 0 5 in LED panel display meter Meter Indicators 0 30 VDC 0 5 of reading 2 digits 0 2 A 0 5 of reading 2 digits Insulation Chassis to Terminal gt 20 MQ at DC 500 V Insulation Chassis to AC Cord gt 30 MQ at DC 500 V 26 PS280 amp PS283 User Manual Appendix A Specification Table 4 Electrical Characteristics Characteristic Line voltage Measurement 90 to 110 108 to 132 198 to 242 216 to 250 all VAC at 50 60 Hz Power consumption 386 VA 300 W maximum PS280 265 VA 200 W maximum P S283 Table 5 Certifications and Compliances EC Declaration of Conformity EMC Meets intent of Directive 89 336 EEC for Electromagnetic Compatibility Compliance was demonstrated to the following Specifications as listed in the Official J ournal of the European Communities 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 E
8. age If the switch is pushed to the left the display shows the current If the switch is pushed to the right the display shows the voltage 4 PS280 amp PS283 User Manual Getting Started 3 AMPS Indicator Lights when AMPS is selected with the AMPS VOLTS switch for the left variable power supply 4 VOLTS Indicator Lights when VOLTS is selected with AMPS VOLTS switch for the left variable power supply 5 AMPS Indicator Lights when AMPS is selected with the AMPS VOLTS switch for the right variable power supply 6 VOLTS Indicator Lights when VOLTS is selected with AMPS VOLTS switch for the right variable power supply 7 AMPS VOLTS Switch This switch selects whether the LED display for the right variable power supply shows the current or the voltage If the switch is pushed to the left the display shows the current If the switch is pushed to the right the display shows the voltage 8 LED Display Lights when the instrument is turned on The numbers indicate the voltage or current produced by the right variable power supply 9 POWER Button Turns on the instrument when pressed When pressed again it turns off the instrument 10 CURRENT Knob Use this control to set the output current for the right variable power supply If the instrument is in a tracking mode the left power supply is the slave and the CURRENT knob has no effect 11 C C Indicator If this is lighted the left variable power supply is produci
9. al 3 Place the instrument into the box and firmly stabilize it with packing material 4 Seal the carton with shipping tape PS280 amp PS283 User Manual 29 Appendix B Maintenance Troubleshooting Electronic maintenance on the power supply must be performed by a trained technician However an operator can perform some basic and routine maintenance Perform the following steps to isolate the fault 1 The power switch is on The instrument is plugged in Neither the C C nor the C V indicator is lighted Check the output terminals with a voltmeter a Set the voltage control of the voltmeter to midrange b Ensure that the range and polarity settings are correct c Place the voltmeter jacks in the PS280 or PS283 output terminals d Determine if the terminals are producing any output Are the outputs working Yes Go to step 2 No Go to step 3 2 Refer to a service technician WARNING To prevent electrical shock unplug the power cord and disconnect the test cables from any power source before checking or replacing the fuse 3 Check the fuse with a multimeter a Set the multimeter to the low ohms range b Apply the multimeter probes across the fuse c Determine if a continuous circuit exists Is the fuse okay Yes Go to step 5 No Go to step 4 4 Replace the fuse 30 PS280 amp PS283 User Manual Appendix B Maintenance 5 Verify that the line settings on the rear panel match the line v
10. be tested 9 Turn on the POWER to the PS280 or PS283 again Adjust the voltages as needed Figure 6 shows the PS280 or PS283 connected to produce separate outputs of 5 V from the FIXED power supply 0 to 30 V from the slave variable power supply and 0 to 30 V from the master variable power supply In this configuration the red output terminal of the master variable power supply is the negative reference terminal because it is directly connected to the ground terminal SLAVE MASTER GND GND 5V FIXED 3A Load 3 Load 2 0 to 30 V 0 to 30 V P 0 to 2 A PS280 0 to 2 A PS 280 aioe 0 to 1 PS283 0 to 1 A PS 283 o Figure 6 Independent Ground Referenced Split Application PS280 amp PS283 User Manual 15 Reference To test a circuit in a independent ground referenced split application mode follow these steps 1 Turn the POWER off to the PS280 or PS283 2 Connect the outputs as shown in Figure 6 3 Set both variable supply VOLTAGE controls to the minimum setting Set both variable supply CURRENT controls to midrange Turn on the POWER to the PS280 or PS283 Set the desired voltages for both variable power supplies Turn the POWER off to the PS280 or PS283 again Connect the device or devices to be tested Turn on the POWER to the PS280 or PS283 again If necessary readjust the voltages Do PERS a AE Figure 7 shows
11. ce being powered to the negative master terminal to obtain output simultaneously from both variable power supplies while in parallel tracking mode f CAUTION To prevent damage to the PS280 or PS283 do not attempt NOTE The 5 V FIXED supply can be independently grounded or allowed to float 24 PS280 amp PS283 User Manual HE Appendix A Specifications Table 1 Physical Characteristics Dimension Measurement Width 255 mm 10 0 in Height 145 mm 5 7 in Depth 335 mm 13 2 in Weight 11 5 kg 25 4 Ib PS280 9 0 kg 19 9 Ib PS283 Table 2 Environmental Characteristics Characteristic Temperature Relative Humidity Storage 10 C to 70 C 70 Operating 0 C to 40 C 80 Table 3 Operational Characteristics Characteristic Measurement Outputs Two 0 to 30 VDC one 5 VDC Voltage 5 V 5 0 0 25 VDC at 3 0 A maximum foldback current limited Voltage 0 30 V 0 30 constant VDC at 2 0 A constant maximum P S280 or 1 0 A constant maximum PS283 Line Regulation 5 V lt 5 mV Line Regulation CV lt 0 01 3 mV PS280 lt 0 01 5 mV PS283 PS280 amp PS283 User Manual 25 Appendix A Specifications Table 3 Operational Characteristics Cont Characteristic Measurement Line Regulation CC lt 0 2 3 mA Load Regulation 5 V lt 0 2 Load Regulation CV lt 0 01 3 mV rating current lt 3 A lt 0 01 5 mV rating current gt 3 A lt 300 m
12. e negative output terminal of one variable power supply to the positive output terminal of the other The stacked configuration allows you to test a circuit requiring between 30 and 60 V A stacked configuration can be either floating or ground referenced Floating In the independently floating mode each variable power supply provides from 0 to 30 V at 0 to 2 A 0 to 1 A for the PS283 Figure 4 shows each of the three power supplies connected to a separate load SLAVE MASTER GND GND 5V FIXED 3A 0 to 2 PS280 0 to 2 PS280 0 to 1 PS283 0 to 1 A PS283 oO O Load 3 Load 2 0 to 30 V 0 to 30 V Figure 4 Independent Floating Application 12 The tracking switches are disengaged for independent operation The left voltage and current control knobs control the outputs for the slave variable power supply and the right knobs do the same for the master power supply All outputs are electrically independent To test a circuit in the independently floating mode follow these steps 1 Press the POWER button to apply power to the PS280 or PS283 2 Rotate the VOLTAGE knob to zero 3 Determine the polarity of your device PS280 amp PS283 User Manual Reference Plug one of the test leads into the positive output terminal Plug the other test lead into the negative output terminal Press POWER to turn off the PS280 or PS283 Clip the positive t
13. efer to Insulated Manual 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 PS280 amp PS283 User Manual v General Safety Summary vi PS280 amp PS283 User Manual RE aS Getting Started The Tektronix PS280 or PS283 Laboratory DC Power Supply is a multifunction bench or portable instrument This regulated power supply provides a fixed 5 V output for powering logic circuits and two variable outputs for a wide variety of test and experimental uses The PS280 or PS283 contains two identical independently adjustable DC power supplies that you can vary from 0 to 30 V The current on the PS280 variable power supplies varies from 0 to 2 A The current on the PS283 variable power supplies varies from 0 to 1 A In all other respects the instruments are identical Unless otherwise noted descriptions and procedures in this manual apply to both instruments Front panel switches select one of three modes of operation m Independent In this mode the output voltage and current of each supply can be controlled independently m Series In this tracking mode the variable outputs are connected in series and the controls of the master power supply adjust the voltages or currents of both power supplies Series mode allows the power supplies to be va
14. es 070 8355 03 CE Copyright Tektronix Inc 1991 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 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 responsible for paying all shipping charges duties taxes and any other charges for products returned to any o
15. est lead to the positive pole of your device Clip the negative test lead to the negative pole of your device Press POWER to turn on the PS280 or PS283 10 Push the AMPS VOLTS selection switch so that the LED display shows either voltage or current as you want 11 Rotate the VOLTAGE knob as desired FN A nn A 12 If you are using a preset current limit see page 10 do not touch the CURRENT knobs Otherwise rotate the CURRENT knob as desired Ground Referenced In the independently ground referenced mode each variable power supply provides from 0 to 30 V referenced with respect to ground at 0 to 2 A 0 to 1 A for the PS283 Any one of a pair of output terminals either the positive or the negative can be connected to ground The FIXED 5 V power supply can also be ground referenced cause electrical shock explosion or fire isolate the device being powered from the line voltage power source when using any ground referenced output configuration from the PS280 or PS283 WARNING In order to avoid grounding the power line which can Figure 5 shows an example of a circuit with the FIXED 5 V terminal referenced to ground and both the master and slave variable power supplies referenced to 5 V PS280 amp PS283 User Manual 13 Reference GOO RERO SLAVE MASTER GND GND 5V FIXED 3A Load 3 Load 2 Load 1 5 T0 25 V 5 T0 25 V 0 to 2 A P
16. lectrostatic 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 Official J ournal of the European Communities Low Voltage Directive 73 23 EEC amended by 93 68 EEC HD401 S1 Safety Requirements for Electronic Measuring Aparatus PS280 amp PS283 User Manual 27 Appendix A Specifications 28 PS280 amp PS283 User Manual EE Appendix B Maintenance This appendix provides information for the basic maintenance of the PS280 or PS283 Laboratory DC Power Supply Cleaning To clean the Laboratory DC 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 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 plastic bag or wrap to protect it from dampness and loose packing materi
17. ls the voltage for both power supplies which can then range from 0 to 60 V Refer to Series on page 20 for further details In parallel mode the master power supply controls both the voltage and the current for both power supplies The current can then range from 0 to 4 A 0 to 2 A for the PS283 Refer to Parallel on page 22 for further details 16 CURRENT Knob Use this control to set the output current for the right variable power supply If the instrument is in a tracking mode the right power supply is the master and the CURRENT knob affects both variable power supplies PS280 amp PS283 User Manual Getting Started 17 Output Terminals These terminals for the right variable power supply allow you to plug in the test leads as follows m The red terminal on the right is the positive polarity output terminal It is indicated by a plus sign above it m The black terminal on the left is the negative polarity output terminal It is indicated by a minus sign above it m The green terminal in the middle is the earth and chassis ground 18 C C Indicator If this is lighted the power supply is producing a constant current See Figure 3 on page 10 for an illustration of the constant voltage constant current crossover point 19 C V Indicator If this is lighted the power supply is producing a constant voltage See Figure 3 on page 10 for an illustration of the constant voltage constant current crossover point
18. n the Instrument 8 Reference 5 ss sats Gain e a ened eae aeons 9 Constant Voltage Constant Current Crossover 9 Setting the Current Limit 10 Jest Modes Ts cs an men A See ee anes Sie Ets 11 Independent Modes 11 Tracking Modes 20 Appendix A Specifications 25 Appendix B Maintenance 29 Cleaning ss benne sr A Rene SEE SMS 29 Preparing for Shipment 29 Troubleshooting 30 Appendix C Replaceable Parts 33 Standard Accessories 33 Optional Accessories 33 PS280 amp PS283 User Manual i Table of Contents List of Figures Figure 1 Line Voltage Selectors Power Input and Fuse Locations Figure 2 PS280 or PS283 Front Panel Figure 3 Constant Voltage Constant Current Crossover Figure 4 Independent Floating Application Figure 5 Independent Common Ground Referenced Application kisis dasa atomes aa et eee Ke ie but Figure 6 Independent Ground Referenced Split Application Figure 7 Three Ground Referenced Negative Power Supplies Figure 8 Three Ground Referenced Positive Power Supplies Figure 9 Independent Po
19. ng a constant current See Figure 3 on page 10 for an illustration of the constant voltage constant current cross over point 12 C V Indicator If this is lighted the left variable power supply is producing a constant voltage See Figure 3 on page 10 for an illustration of the constant voltage constant current cross over point PS280 amp PS283 User Manual 5 Getting Started 13 Output Terminals These terminals for the left variable power supply allow you to plug in the test leads as follows m The red terminal on the right is the positive polarity output terminal It is indicated by a sign above it m The black terminal on the left is the negative polarity output terminal It is indicated by a sign above it m The green terminal in the middle is the earth and chassis ground 14 VOLTAGE Knob Allows you to set the output voltage for the left variable power supply If the instrument is in a tracking mode the left power supply is the slave and the VOLTAGE knob has no effect 15 TRACKING Buttons These buttons select the test mode of the instrument The PS280 or PS283 features two tracking modes series and parallel If both push button switches are disengaged out the two variable power supplies operate independently If the left switch is pushed in the instrument operates in series mode If both switches are pushed in the instrument operates in parallel mode In series mode the master power supply contro
20. oltage Do they Yes Go to step 7 No Go to step 6 6 Reset the line settings Refer to Preparing the Power Supply for Use on page 2 7 Check the power cord WARNING To prevent personal injury be sure the power cord is disconnected at both ends before you check it Is the power cord frayed or broken Yes Go to step 8 No Go to step 2 8 Replace the power cord 9 The power switch is on A variable output power supply is connected to a circuit The C C or C V indicator is on Neither variable output power supply is producing any electrical output Disconnect the instrument from the circuit Check the output terminals with a voltmeter Are the outputs working Yes Go to step 10 No Go to step 2 10 Check the circuit you have been testing for a short or low resistance PS280 amp PS283 User Manual 31 Appendix B Maintenance 32 PS280 amp PS283 User Manual u RE Appendix C Replaceable Parts Replaceable parts may be ordered directly from your authorized Tektronix dealer Standard Accessories The following items are shipped with the Laboratory DC Power Supply Table 6 Standard Accessories Accessory Tektronix Part Number Fuse 5 x 20 mm 4 250 V SB 159 0297 00 PS280 90 132 V operation Fuse 5 x 20 mm 2 5 250 V SB 159 0226 00 PS283 90 132 V operation Test Leads 196 3201 00 User Manual 070 8355 XX 115 V Power Cord Refer to Table 8 Optional Accesso
21. on the voltage metering LED display because both supplies are producing the same voltage 5 Set the slave CURRENT knob fully clockwise 6 Set the current limit using the master CURRENT knob Refer to Setting the Current Limit on page 10 PS280 amp PS283 User Manual 21 Reference NOTE In series tracking mode the current flowing through the two supplies must be equal Therefore the maximum current limit is the lower of the values set by the two current control knobs 7 Turn on the POWER to the PS280 or PS283 8 Adjust the output voltage to the desired level using the master VOLTAGE knob 9 Turn the POWER off to the PS280 or PS283 again 10 Connect the device or devices to be tested 11 Turn on the POWER to the PS280 or PS283 again Readjust the voltages if necessary NOTE The 5 V FIXED supply can be independently grounded or allowed to float Parallel In parallel tracking mode the positive output terminals of both variable power supplies are internally connected and the negative output terminals of both variable power supplies are internally connected These connections allow the PS280 or PS283 to produce 0 to 30 V at 0 to 4 A 0 to 2 A for the PS283 When you place the PS280 or PS283 in parallel mode the output terminals are hooked together internally as shown in Figure 13 The master power supply s VOLTAGE and the CURRENT knobs control the voltage and current for both variable power s
22. pply is internally connected to the negative output terminal of the slave power supply This connection allows the PS280 or PS283 to produce 0 to 60 V at 0 to 2 A 0 to 1 A for the PS283 When you place the PS280 or PS283 in series mode the output terminals are hooked together internally as shown in Figure 11 MASTER SLAVE Figure 11 Series Tracking Inside the PS280 or PS283 The voltage knob for the master variable power supply controls the voltage for both variable power supplies Using the master voltage control the maximum slave supply voltage is automatically set to the same value as the master supply To test a circuit in the series tracking mode follow these steps PS280 amp PS283 User Manual Reference 1 Turn the POWER off to the PS280 or PS283 2 Connect the outputs as shown in Figure 12 INTERNAL SLAVE MASTER GND GND 5V FIXED 3A K O L Load 1 0 to 60 V Figure 12 Series Tracking Application 3 Set the PS280 or PS283 to series tracking mode by pressing the left TRACKING button Make sure that the right TRACKING button is released out 4 Set the master AMPS VOLTS switch to the voltage metering position Set the slave AMPS VOLTS switch to the current metering position This allows you to simultaneously monitor both current and voltage NOTE In series tracking mode the output voltage is double the value displayed
23. replacing the fuse 2 Check that the correct line fuse is installed The line fuse provides protection if the equipment malfunctions or an overload 2 PS280 amp PS283 User Manual Getting Started occurs Refer to Appendix C Replaceable Parts on page 33 for fuse part numbers properly grounded power source The outside ground of this connector is connected through the equipment to the power source ground Do not remove the ground lug from the power cord for any reason WARNING To prevent electrical shock connect the power cord to a 3 Connect the input power cord Use only the power cords specified for this equipment Refer to Appendix C Replaceable Parts on page 33 for power cord part numbers PS280 amp PS283 User Manual Getting Started Front Panel Figure 2 shows the front panel controls connectors and indicators with brief descriptions following the figure O POWER ON A OFF VOLTAGE CURRENT VOLTAGE E wo a SERES D 2 PARALLEL aL 9 10 1112 1314 15 16 17 1819 20 21 22 Figure 2 PS280 or PS283 Front Panel 1 LED Display Lights when the instrument is turned on The numbers indicate the voltage or current produced by the left variable power supply 2 AMPS VOLTS Switch This switch selects whether the LED display for the left variable power supply shows the current or the volt
24. ried from 0 to 60 V at 0 to 2 A for the PS280 or 0 to 1 A for the PS283 m Parallel In this tracking mode the variable outputs are connected in parallel and the controls of the master power supply adjust the voltages or currents of both power supplies Parallel mode allows the power supplies to be varied from 0 to 4 A for the PS280 at 0 to 30 V or from 0 to 2 A at 0 to 30 V for the PS283 PS280 amp PS283 User Manual 1 Getting Started Preparing the Power Supply for Use Check the following items prior to operating the Laboratory DC Power Supply for the first time see Figure 1 for locations of items 1 through 3 Figure 1 Line Voltage Selectors Power Input and Fuse Locations CAUTION To prevent damage to the instrument set the line voltage selectors to the proper voltage setting 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 refer to Appendix A Specifications on page 25 disconnect the test leads from the circuit before checking or WARNING To prevent electrical shock unplug the power cord and
25. ries The following items are available as optional accessories Table 7 Optional Accessories Accessory Tektronix Part Number Fuse 5 x 20 mm 2 A 250 V SB 159 0107 00 PS280 198 250 V operation Fuse 5 x 20 mm 1 25 A 250 V SB 159 0247 00 PS283 198 250 V operation 230 V Power Cords Refer to Table 8 PS280 amp PS283 User Manual 33 Appendix C Replaceable Parts The following power cords are available Table 8 Accessory Power Cords Tektronix Part Plug Configuration Normal Usage Number North America 161 0104 00 115 V Europe 161 0104 06 230 V United Kingdom 161 0104 07 230 V Australia 161 0104 05 A 230 V North America 161 0104 08 230 V Switzerland 161 0167 00 230 V 34 PS280 amp PS283 User Manual
26. 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 Product Damage Precautions 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 service personnel Safety Terms and Symbols A 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 PS280 amp PS283 User Manual General Safety Summary f 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 4 A m DANGER Protective Ground ATTENTION Double High Voltage Earth Terminal R
27. sitive Stacked Application Figure 10 Independent Negative Stacked Application Figure 11 Series Tracking Inside the PS280 or PS283 Figure 12 Series Tracking Application Figure 13 Parallel Tracking Inside the PS280 or PS283 Figure 14 Parallel Tracking Application PS280 amp PS283 User Manual C General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it 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 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 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 PS280 amp PS283 User Manual iii General Safety Summary Do Not Operate in Wet Damp Conditions To avoid electric
28. the configuration for three ground referenced negative power supplies SLAVE MASTER GND GND 5V FIXED 3A 0 to 30 V 0 to 30 V Load 3 Load 2 Load 1 Figure 7 Three Ground Referenced Negative Power Supplies 16 PS280 amp PS283 User Manual Reference Figure 8 shows the configuration for three ground referenced positive power supplies SLAVE MASTER GND 5V FIXED 3A D Load 3 Load 2 Load 1 0 to 30 V 0 to 30 V 5V 0 to 2 A PS280 0 to 2 A PS280 0to3A 0 to 1 A PS283 0 to 1 A PS283 GND Figure 8 Three Ground Referenced Positive Power Supplies Stacked In the independently stacked mode the variable power supplies are connected and provide from 0 to 60 V at 0 to 2 A 0 to 1 A for the PS283 Figure 9 on page 18 shows the PS280 or PS283 connected in a stacked manner to produce a variable output of 0 to 60 V ground referenced The FIXED power supply produces 5 V ground referenced In this configuration the red output terminal of the master variable power supply is the negative reference terminal because it is directly connected to the ground terminal PS280 amp PS283 User Manual 17 Reference SLAVE MASTER GND GND 5V FIXED 3A
29. ther 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 SC EE Table of Contents General Safety Summary iii Getting Started 85 esse RER RE RR 1 Preparing the Power Supply for Use 2 Front Paneles ene ant ee ee Gy ed 4 Turning O
30. upplies 22 PS280 amp PS283 User Manual Reference MASTER SLAVE Figure 13 Parallel Tracking Inside the PS280 or PS283 To test a circuit in the parallel tracking mode follow these steps 1 Turn the POWER off to the PS280 or PS283 2 Connect the outputs as shown in Figure 14 on page 24 3 Set the PS280 or PS283 to parallel tracking mode by pressing both tracking buttons 4 Set the master AMPS VOLTS switch to the voltage metering position and set the slave AMPS VOLTS switch to the current metering position This allows you to simultaneously monitor both current and voltage NOTE In parallel tracking mode the output current is double the value displayed on the current metering LED display because both supplies are producing the same amount of current 5 Turn on the POWER to the PS280 or PS283 6 Set the current limit using the master CURRENT knob Refer to Setting the Current Limit on page 10 PS280 amp PS283 User Manual 23 Reference INTERNAL 5V FIXED 3A Load 1 0 to 30 V 0 to 4A PS280 0 to 2 A PS283 Figure 14 Parallel Tracking Application 7 Adjust the output voltage to the desired level using the master VOLTAGE knob 8 Turn the POWER off to the PS280 or PS283 again 9 Connect the positive polarity of the device being powered to the positive master terminal 10 Connect the negative polarity of the devi
31. voltage mode also occurs automatically in response to a decrease in load For example suppose you are charging a 12 V battery Initially the open circuit voltage of the power supply is preset for 13 8 V A low battery places a heavy load on the power supply and it operates in constant current mode You adjust the instrument to charge the battery at the rate of 1 A As the battery becomes charged and its voltage approaches 13 8 V the load decreases to the point where the battery no longer demands the full 1 A charging rate The PS280 or PS283 then crosses over to constant voltage mode PS280 amp PS283 User Manual 9 Reference Vo Constant Current Maximum Range Crossover Point A Output Voltage Constant Voltage Range y Output Current l Maximum Figure 3 Constant Voltage Constant Current Crossover Setting the Current Limit Before you begin using the PS280 or PS283 to power a device you should set its current limit lower than the maximum safe current for the device to be powered CAUTION In order to avoid damaging your device with a current overload set the current limit on the PS280 or PS283 before you connect it to your device 1 Determine the maximum safe current for the device to be powered 2 With the test lead temporarily short the positive and the negative output terminals of the power supply together 10 PS280 amp PS283 User Manual Reference
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