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In this section:

Welcome .................................................................................. 1-1

Extended warranty.................................................................... 1-1

Contact information .................................................................. 1-1

Welcome

hank you for using a Keithley Instruments product. The Model 2231A-30-3 Triple-Channel

Programmable DC Power Supply is a flexible DC source designed to power a wide range of

applications. It offers three independent and isolated power channels, allowing you to power circuits

with different references or polarities. Each channel can be enabled or disabled as your application

requires. Basic current accuracy is 0.2% for all channels and linear regulation delivers low noise –

less than 5 mV

. Flexible display modes make it easy to use the two 30 V outputs in combination,

and the DB9 interface connector makes it easy to build PC-based systems. This compact power

supply covers a wide range of applications without covering a lot of bench space.

Extended warranty

Additional years of warranty coverage are available on many products. These valuable contracts

protect you from unbudgeted service expenses and provide additional years of protection at a fraction

of the price of a repair. Extended warranties are available on new and existing products. Contact your

local Keithley Instruments office, sales partner, or distributor for details.

Contact information

If you have any questions after you review the information in this documentation, please contact your

local Keithley Instruments office, sales partner, or distributor, or call Keithley Instruments corporate

headquarters (toll-free inside the U.S. and Canada only) at 1-888-KEITHLEY (1-888-534-8453), or

from outside the U.S. at +1-440-248-0400. For worldwide contact numbers, visit the

Keithley

Instruments website

(

http://www.keithley.com

Section 1

Introduction

Содержание Keithley 2231A-30-3

Страница 1: ...www keithley com Triple Channel DC Power Supply Performance Verification 077 1027 00 July 2014 P077102700 077 1027 00 A Tektronix Company Model 2231A 30 3 ...

Страница 2: ... of the information herein in whole or in part without the prior written approval of Keithley Instruments is strictly prohibited All Keithley Instruments product names are trademarks or registered trademarks of Keithley Instruments Other brand names are trademarks or registered trademarks of their respective holders Document number 077102700 July 2014 Model 2231A 30 3 ...

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Страница 4: ...tions operating manual and instrument labels do not connect any instrument to mains Exercise extreme caution when a shock hazard is present Lethal voltage may be present on cable connector jacks or test fixtures The American National Standards Institute ANSI states that a shock hazard exists when voltage levels greater than 30 V RMS 42 4 V peak or 60 VDC are present A good safety practice is to ex...

Страница 5: ...t might result in personal injury or death Always read the associated information very carefully before performing the indicated procedure The CAUTION heading in the user documentation explains hazards that could damage the instrument Such damage may invalidate the warranty Instrumentation and accessories shall not be connected to humans Before performing any maintenance disconnect the line cord a...

Страница 6: ...equired 3 10 Self Test 3 12 Check DC Voltage Setting Accuracy and Voltage Readback Accuracy 3 14 Check DC Voltage Line Regulation 3 15 Check DC Voltage Load Regulation 3 17 Check DC Current and DC Current Readback Accuracy 3 18 Check DC Current Line Regulation 3 20 Check DC Current Load Regulation 3 23 Check Voltage Noise 7 MHz 3 24 Check Voltage Noise 20 MHz 3 26 Check Current Noise 3 28 Table of...

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Страница 8: ...er supply covers a wide range of applications without covering a lot of bench space Extended warranty Additional years of warranty coverage are available on many products These valuable contracts protect you from unbudgeted service expenses and provide additional years of protection at a fraction of the price of a repair Extended warranties are available on new and existing products Contact your l...

Страница 9: ......

Страница 10: ... Internal readback capability Voltage and current are measured internally Current Readback Resolution 1mA Current Readback Accuracy 0 2 of reading 10mA at 25 C 5 C Current Readback Temperature 0 03 of setting per C outside the 25 C 5 C standard range Voltage Readback Accuracy 0 06 of reading 20mV at 25 C 5 C Voltage Readback Resolution Nominal 10mV Voltage Readback Temperature Coefficient typical ...

Страница 11: ...pical 0 03 of setting per C outside of the 25 C 5 C standard range Meter nominal Internal readback capability Voltage and current can be measured internally Current Readback Resolution nominal 1mA Current Readback Accuracy 0 2 of reading 10mA at 25 C 5 C Current Readback Temperature Coefficient typical 0 03 of setting per C outside of the 25 C 5 C standard range Voltage Readback Accuracy 0 06 of r...

Страница 12: ...C 5 C Parallel Combination Current Accuracy typical 0 2 25mA at 25 C 5 C Table 4 Series 2231A Triple Channel instrument characteristics Characteristic Description Instrument Characteristics nominal Characteristics and specifications of features unique to this product but unrelated to a particular channel Instrument Specific Mains Requirements 2231A 30 3 Line Selection Voltage Frequency Fuse Rating...

Страница 13: ...00 meters above sea level Nonoperating Up to 4 000 meters Table 8 Safety characteristics Item 2231A 30 3 Safety Certifications U S Nationally Recognized Testing Laboratory NRTL Listing UL61010 1 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use Canadian Certification CAN CSA C22 2 No 61010 1 Safety Requirements for Electrical Equipment for Measurement Control ...

Страница 14: ...y 1 2 Emissions CISPR 11 Class A Immunity IEC 61000 4 2 IEC 61000 4 3 IEC 61000 4 4 IEC 61000 4 5 IEC 61000 4 6 IEC 61000 4 8 IEC 61000 4 11 EN 61000 3 2 EN 61000 3 3 1 1 Emissions that exceed the levels defined by this standard may occur when this equipment is connected to a test object 2 Use high quality shielded cables to maintain compliance Australia EMC Framework demonstrated per Emission Sta...

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Страница 16: ...this product and any associated instrumentation Although some instruments and accessories are used with nonhazardous voltages there are situations where hazardous conditions may be present This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury Before using the product carefully read and foll...

Страница 17: ...apable of safely carrying the full rated short circuit output current of the power supply Do not loosen any screw on this product There are no user serviceable components inside Test Record Model Serial number Procedure performed by Date Test Passed Failed Self test DC voltage accuracy DC voltage readback accuracy DC voltage line regulation DC voltage load regulation DC current accuracy DC current...

Страница 18: ...2 50000V 0 5A 22 47875V 22 52125V 100 30 00000V 0 5A 29 96650V 30 03350V Instrument test voltage DUT voltage Test current Min Measured Max Channel 2 0 0 00000V 0 5A 0 00000V 0 02000V 25 7 500000V 0 5A 7 47550V 7 52450V 50 15 00000V 0 5A 14 9710V 15 02900V 75 22 50000V 0 5A 22 47875V 22 52125V 100 30 00000V 0 5A 29 96650V 30 03350V Instrument test voltage DUT voltage Test current Min Measured Max C...

Страница 19: ...0 15 00000V 0 5A 0 02900V 75 22 50000V 0 5A 0 03350V 100 30 00000V 0 5A 0 03800V Instrument test Measured Voltage Absolute Maximum voltage DUT voltage Test current voltage readout difference difference Channel 2 0 0 00000V 0 5A 0 02000V 25 7 500000V 0 5A 0 02450V 50 15 00000V 0 5A 0 02900V 75 22 50000V 0 5A 0 03350V 100 30 00000V 0 5A 0 03800V Instrument test Measured Voltage Absolute Maximum volt...

Страница 20: ...annel 2 0 0120000V Channel 3 0 0072000V Table 13 DC voltage load regulation Max Ref Instrument Min load Ref load Max load Ref Min Max Ref 0 98 Max value Channel 1 0 0120000V Channel 2 0 0120000V Channel 3 0 0072000V Table 14 DC current accuracy Instrument test current Test voltage DUT current Min Measured current Max Channel 1 0 15 V 0 0000A 0 000000A 0 01000A 25 15V 0 7500A 0 73850A 0 76150A 50 1...

Страница 21: ...300A 75 15V 2 2500A 2 2355A 2 2645A 100 15V 3 0000A 2 9840A 3 0160A Instrument test current Test voltage DUT current Min Measured current Max Channel 3 0 3V 0 00000A 0 000000A 0 01000A 25 3V 0 7500A 0 73850A 0 76150A 50 3V 1 5000A 1 48700A 1 51300A 75 3V 2 2500A 2 2355A 2 2645A 100 3V 3 0000A 2 9840A 3 0160A Table 15 DC current readback accuracy Instrument test Measured Absolute Maximum voltage Te...

Страница 22: ...Channel 2 0 0A 0 0100A 25 0 75A 0 0115A 50 1 5A 0 013A 75 2 25A 0 0145A 100 3 0A 0 016A Instrument test Measured Absolute Maximum voltage Test current current current readout difference difference Channel 3 0 0A 0 0100A 25 0 75A 0 0115A 50 1 5A 0 013A 75 2 25A 0 0145A 100 3 0A 0 016A Table 16 DC current line regulation Instrument Test voltage Min line Max line Nom line Nom Min Max Nom Largest Max ...

Страница 23: ...rgest difference Channel 1 0 003120A Chann el 2 0 003120A Channel 3 0 003400A Table 18 Voltage noise at 7MHz Voltage test Measured Maximum Measured Maximum Instrument load R1 RMS RMS pk pk pk pk Channel 1 40Ω Ω Ω 1mV 5mV Channel 2 40 1mV 5mV Channel 3 2 5 1mV 5mV Table 19 Voltage noise at 20MHz Voltage test Measured Maximum Measured Maximum Instrument load R1 RMS RMS pk pk pk pk Channel 1 40 Ω 6mV...

Страница 24: ...Power Supply Performance Verification Section 3 Performance Verification 077102700 July 2014 3 9 Table 20 Current noise at 20MHz Current test Measured Maximum Instrument load R1 RMS RMS Channel 1 1Ω 6mA Channel 2 1Ω 6mA Channel 3 1Ω 6mA ...

Страница 25: ...ially test the DUT using an individual test a 20 minute warm up period is required for the individual test 3 You must connect the DUT and the test equipment to the same AC power circuit Connect the DUT and test instruments into a common power strip if you are unsure of the AC power circuit distribution Connecting the DUT and test instruments into separate AC power circuits can result in offset vol...

Страница 26: ...ey 2000 DMM 5 High current hookup wire high current connections are indicated with bold lines in the setup illustrations 18 AWG minimum hookup wire assemblies To perform all tests the following wire assemblies need to be created 10 fork lug to 10 fork lug Qty 2 Stackable banana to 10 fork lug Qty 2 Stackable banana to bare wire Qty 2 Wire lengths are not critical 6 Low current hookup wire low curr...

Страница 27: ...uire a banana plug jack or equivalent to connect to the power supply Vishay Dale HL10006Z1R000JJ 12 Oscilloscope 20 MHz bandwidth limited oscilloscope at 1 mV division Tektronix DPO3012 13 Oscilloscope probe Low capacitance 1 MΩ 10 MΩ 1X 10X 6 MHz 200MHz probe Tektronix P2220 1X probe 14 Oscilloscope probe Low capacitance 10 MΩ 500 MHz probe Tektronix P6139A 10X 15 Coaxial cable 50 Ω BNC male to m...

Страница 28: ...5 If the calibration data in the EEPROM is missing the display appears as follows 6 If the latest operating state of the power supply in the EEPROM is missing the display appears as follows 7 If there is no response when you power on the DUT verify that there is AC power to the power supply verify the power line voltage settings and verify that the correct power line fuse is installed If you need ...

Страница 29: ...t hookup wire fine line connections DC voltmeter For each channel sequentially 1 Set up the equipment as shown Figure 1 Voltage accuracy regulation and protection test setup Ensure the warm up criteria have been met as described in the Performance Verification Conditions topic To assure accurate measurements the voltmeter must connect as close as possible to the front panel of the DUT A solution i...

Страница 30: ...ithout remote sense 8 Enter the voltmeter reading into the table for checking DC voltage readback accuracy 9 Enter the channel under test readback voltage into the table for DC voltage readback accuracy 10 Calculate the difference between the two measurements taken in steps 8 and 9 and enter the absolute value into the difference column of the table 11 Increase the channel under test output voltag...

Страница 31: ...stant current b Set to draw the specified test current Channel Test current Channel 1 3A Channel 2 3A Channel 3 3A 4 Set the channel under test to 100 of the full scale output current 5 Set the channel under test to 100 of the full scale output voltage 6 Turn the DUT output on 7 Enter the voltmeter reading the min column of the table for checking DC Voltage Line Regulation for the channel under te...

Страница 32: ...of the two values calculated in step 12 into the largest column 14 This completes the check for one channel If needed return to step 1 to run through the verification procedure for the next channel Check DC Voltage Load Regulation This verification procedure uses the same test setup as the previous procedure Perform the procedure for each channel sequentially Ensure the warm up criteria have been ...

Страница 33: ...ad to the maximum load test current value Channel Maximum load test current Channel 1 3A Channel 2 3A Channel 3 3A 10 Enter the voltmeter reading in the maximum load column of the table for checking DC Voltage Load Regulation for the channel 11 Calculate the three values Ref Min Max Ref and Max Ref 0 98 Enter the values in the appropriate columns 12 Enter the largest of the three values calculated...

Страница 34: ...tion 3 Performance Verification 077102700 July 2014 3 19 For each channel sequentially 1 Set up the equipment as shown Ensure the warm up criteria have been met as described in the Performance Verification Conditions topic Figure 2 DC current accuracy and regulation test setup ...

Страница 35: ...he full scale output current 5 Set the channel under test to 100 of the full scale output voltage 6 Turn the DUT output on 7 Enter the voltmeter reading into the table for checking DC current accuracy 8 Enter the voltmeter reading into the table for checking DC current readback accuracy 9 Enter the channel under test readback current readout in the current readout column of the table for checking ...

Страница 36: ... Press the arrow key to move the cursor to the first digit and then press the up range button once so that M 20 00000 Press the Enter button and check that the display shows B 0 Press the Enter button and check that the display shows UNITS Use the arrow keys to modify the display to show AMP Adjust each letter individually 3 Set the electronic load as follows a Set to constant voltage b Set to the...

Страница 37: ...tage specified in the following table DUT voltage selector switch AC power source voltage 110 115V 220 230 V 11 Enter the voltmeter reading in the Nom column for the channel under test 12 Calculate the two values Nom Min and Max Nom Enter the values in the appropriate columns 13 Select the largest of the two calculations from step 12 and enter the value in the Largest column 14 Turn the DUT output...

Страница 38: ...0 Press the arrow key to move the cursor to the first digit and then press the up range button once so that M 20 00000 Press the Enter button and check that the display shows B 0 Press the Enter button and check that the display shows UNITS Use the arrow keys to modify the display to show AMP Adjust each letter individually 2 Set the electronic load as follows a Set to Constant Voltage b Set to ou...

Страница 39: ...urrent load regulation at the maximum voltage for the channel under test 11 Calculate the two values REF Min and Max REF Enter the values into the appropriate columns 12 Select the larger of the two calculated values from step 11 and enter the value into the Largest column 13 Power off the DUT and test equipment This completes the verification procedure for one channel If needed return to step 1 t...

Страница 40: ...y reject Noise directly on the mains is typically better controlled Use the same mains outlet for both the DUT and test oscilloscope to avoid ground loops which may cause noise 3 Power on the DUT and test oscilloscope Ensure the warm up criteria have been met as described in the Performance Verification Conditions topic 4 Set up the equipment as shown Use the appropriate load resistor depending on...

Страница 41: ...ull scale output voltage 8 Set the channel under test to the 100 full scale output current 9 Turn the DUT output on Do not touch the load resistor The load resistor may become hot enough to cause burns 10 Enter the oscilloscope measurements into the table for checking Noise at 7 MHz This completes the verification procedure for one channel If needed return to step 1 to run through the procedure fo...

Страница 42: ...ts of high frequency noise on the power line that the instrument may not fully reject Noise directly on the mains is typically better controlled Use the same mains outlet for both the DUT and test oscilloscope to avoid ground loops which may cause noise 3 Power on the DUT and test oscilloscope Ensure the warm up criteria have been met as described in the Performance Verification Conditions topic 4...

Страница 43: ...easurements in the table for checking Noise at 20 MHz This completes the verification procedure for one channel If needed return to step 1 to run through the procedure for the next channel Check Current Noise Equipment required High current hookup wire bold line connections Oscilloscope 1 Ω load resistor Oscilloscope 10X probe For each channel sequentially 1 Plug the DUT into your local line power...

Страница 44: ...uipment as shown Figure 5 20 MHz current noise test setup 5 Set up the oscilloscope as follows a 1 mV division b 1 MΩ input resistance c 20 MHz bandwidth limit d AC coupled e Line trigger f 2 ms div g Set to measure V pk pk and V RMS 6 Set the channel under test channel under test to the 100 full scale output voltage 7 Set the channel under test to the 100 full scale output current 8 Turn the DUT ...

Страница 45: ...ce Verification 3 30 077102700 July 2014 9 Enter the oscilloscope measurements in the table for Current noise at 20MHz 10 Power off the DUT and test equipment This completes the verification procedure for one channel If needed return to step 1 to run through the procedure for the next channel ...

Страница 46: ...e property of Keithley Instruments All other trademarks and trade names are the property of their respective companies Keithley Instruments Corporate Headquarters 28775 Aurora Road Cleveland Ohio 44139 440 248 0400 Fax 440 248 6168 1 888 KEITHLEY www keithley com 7 14 A Greater Measure of Confidence ...

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