Tektronix Series 2260B Multi-Range Programmable DC Power Supplies Verification,Adjustment Manual User manual

www.tek.com/keithley

Series 2260B

Multi-Range Programmable DC Power Supplies

Verification and Adjustment Manual

077104803 / June 2021

*P077104803*

077104803

Programmable Power Supplies

Series 2260B

Verification and Adjustment Manual

Cleveland, Ohio, U.S.A.

Any unauthorized reproduction, photocopy, or use of the information herein, in whole or in part,

without the prior written approval of Keithley Instruments, LLC, is strictly prohibited.

These are the original instructions in English.

All Keithley Instruments product names are trademarks or registered trademarks of Keithley

Instruments, LLC. Other brand names are trademarks or registered trademarks of their respective

holders.

PUC-Rio. You can access terms of license for the Lua software and associated documentation at

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Microsoft, Visual C++, Excel, and Windows are either registered trademarks or trademarks of

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Document number: 077104803 June 2021

Safety precautions

The following safety precautions should be observed before using this product and any associated instrumentation. Although some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous conditions may be present.

This product is intended for use by personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using the product. Refer to the user documentation for complete product specifications.

If the product is used in a manner not specified, the protection provided by the product warranty may be impaired.

The types of product users are:

Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.

Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the instrument. They must be protected from electric shock and contact with hazardous live circuits.

Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line voltage or replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures explicitly state if the operator may perform them. Otherwise, they should be performed only by service personnel.

Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained service personnel may perform installation and service procedures.

Keithley products are designed for use with electrical signals that are measurement, control, and data I/O connections, with low transient overvoltages, and must not be directly connected to mains voltage or to voltage sources with high transient overvoltages. Measurement Category II (as referenced in IEC 60664) connections require protection for high transient overvoltages often associated with local AC mains connections. Certain Keithley measuring instruments may be connected to mains. These instruments will be marked as category II or higher.

Unless explicitly allowed in the specifications, 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 expect that hazardous voltage is present in any unknown circuit before measuring.

Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential human contact. Product operators in these circumstances must be trained to protect themselves from the risk of electric shock. If the circuit is capable of operating at or above 1000 V, no conductive part of the circuit may be exposed.

Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance-limited sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective devices to limit fault current and voltage to the card.

Before operating an instrument, ensure that the line cord is connected to a properly-grounded power receptacle. Inspect the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.

When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input power disconnect device must be provided in close proximity to the equipment and within easy reach of the operator.

For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.

Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth) ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured.

For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or accessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may be impaired.

Do not exceed the maximum signal levels of the instruments and accessories. Maximum signal levels are defined in the specifications and operating information and shown on the instrument panels, test fixture panels, and switching cards.

When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard.

Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground) connections.

If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use of a lid interlock.

screw is present, connect it to protective earth (safety ground) using the wire recommended in the user documentation.

If a

The

symbol on an instrument means caution, risk of hazard. The user must refer to the operating instructions located in the

user documentation in all cases where the symbol is marked on the instrument.

The symbol on an instrument means warning, risk of electric shock. Use standard safety precautions to avoid personal contact with these voltages.

The symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.

The

If this

symbol indicates a connection terminal to the equipment frame.

symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be

properly disposed of according to federal, state, and local laws.

The WARNING heading in the user documentation explains hazards that 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.

The CAUTION heading with the

symbol in the user documentation explains hazards that could result in moderate or minor injury or damage the instrument. Always read the associated information very carefully before performing the indicated procedure. Damage to the instrument may invalidate the warranty.

Instrumentation and accessories shall not be connected to humans.

Before performing any maintenance, disconnect the line cord and all test cables.

To maintain protection from electric shock and fire, replacement components in mains circuits — including the power transformer, test leads, and input jacks — must be purchased from Keithley. Standard fuses with applicable national safety approvals may be used if the rating and type are the same. The detachable mains power cord provided with the instrument may only be replaced with a similarly rated power cord. Other components that are not safety-related may be purchased from other suppliers as long as they are equivalent to the original component (note that selected parts should be purchased only through Keithley to maintain accuracy and functionality of the product). If you are unsure about the applicability of a replacement component, call a Keithley office for information.

Unless otherwise noted in product-specific literature, Keithley instruments are designed to operate indoors only, in the following environment: Altitude at or below 2,000 m (6,562 ft); temperature 0 °C to 50 °C (32 °F to 122 °F); and pollution degree 1 or 2.

To clean an instrument, use a cloth dampened with deionized water or mild, water-based cleaner. Clean the exterior of the instrument only. Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with no case or chassis (e.g., a data acquisition board for installation into a computer) should never require cleaning if handled according to instructions. If the board becomes contaminated and operation is affected, the board should be returned to the factory for proper cleaning/servicing.

Safety precaution revision as of June 2017.

Thank you for choosing a Keithley Instruments product. The Series 2260B Programmable DC Power Supplies is designed for use in the laboratory and for test applications. It also has excellent regulation and low output voltage ripple. The digital displays provide accurate readings of voltage and current and also provide for easy, precise setting of output values using digital entry of current and voltage values. Output voltage can be set from the front panel, using a remote analog voltage or resistance, or over any of the digital interfaces: LAN, USB, GPIB, or RS-485. Voltage and current analog outputs are also available for remote monitoring and analog control.

Section 1

Introduction

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

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

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

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. You can also call the Tektronix corporate headquarters (toll-free inside the U.S. and Canada only) at 1-800-833-9200. For worldwide contact numbers, visit tek.com/contact-us

.

Section

Verification and Adjustment Manual

360 watt models

720 watt models

1080 watt models

0 V to 30 V

0 V to 80 V

0 V to 250 V

0 V to 800 V

2260B-30-36

0 V to 30 V

0 A to 36 A

360 W

2260B-30-72

0 V to 30 V

0 A to 72 A

720 W

2260B-30-108

0 V to 30 V

0 A to 108 A

1080 W

2260B-80-13

0 V to 80 V

0 A to 13.5 A

360 W

2260B-80-27

0 V to 80 V

0 A to 27 A

720 W

2260B-80-40

0 V to 80 V

0 A to 40.5 A

1080 W

2260B-250-9

0 V to 250 V

0 A to 9 A

720 W

2260B-250-13

0 V to 250 V

0 A to 13.5 A

1080 W

2260B-800-1

0 V to 800 V

0 A to 1.44 A

360 W

2260B-800-2

0 V to 800 V

0 A to 2.88 A

720 W

2260B-800-4

0 V to 800 V

0 A to 4.32 A

1080 W

1: Introduction Series 2260B Programmable Power Supplies

Series 2260B available models

The 2260B series consists of 12 models, divided into three model types:

Also, there are four power capacities for the models:

The following is the list of all models with the corresponding voltage, current, and power.

Model number Output voltage Output current Power

2260B-250-4 0 V to 250 V 0 A to 4.5 A 360 W

1-2 077104803 / June 2021

Verification equipment .............................................................. 2-2

In this section:

Verification information ............................................................. 2-1

Verification information

In order to make sure that the power supply is working properly and performing accurately, it is recommend that you use the equipment listed for verifying your equipment (Verification equipment (on page 2-2)). Also, note the following conditions and parameters that you should follow when performing verification procedures.

Section 2

Verification preparation

It is recommended that you verify instrument specifications when:

• Using the power supply in a new environment.

• Removing the cover for any reason.

The following are the environmental conditions that are required when performing verification and adjustment:

• Indoor location only; no direct sunlight; dust free area

• Relative humidity <80%

• Temperature +18 to 28 °C (64 to 82 °F)

• Warm-up time ≥30 minutes

If the verification fails:

• You will need to perform the adjustment procedure.

• If the adjustment does not accomplish the desired result you will have to send the instrument to

your local Keithley Instruments office, sales partner, or distributor for repair (see

information (on page 1-1)).

Contact

Section

Verification and Adjustment Manual

Precision current shunt

3 A (0.1 Ω) 0.02% TC = 10 ppm / °C

GW Instek PCS-1000 or

30 A (0.01 Ω) 0.02% TC = 10 ppm / °C

300 A (0.001 Ω) 0.02% TC = 10 ppm / °C

Electronic loads

60 V, 240 A minimum with transient capability and a slew rate of 1 A/μs or better.

Various manufacturers of

500 V, 60 A minimum with transient capability and a slew rate of 0.4 A/μs or better.

1000 V, 12 A minimum with transient capability and a slew rate of 0.2 A/μs or better.

AC power supply Adjustable to highest rated input voltage range

Ametek 3001i or equivalent

Power: 3000 VA

Oscilloscope

Sensitivity: 1 mV

Tektronix DPO4014B or

Bandwidth limit: 20 MHz

Probe: 1:1 with JEITA RC-9131B

Digital multimeter

Voltage resolution: 0.1 mV

Keithley DMM 7510 or

Accuracy: <0.01% mV of reading

2: Verification preparation Series 2260B Programmable Power Supplies

Verification equipment

The following is a list of the recommended equipment used for verifying the specifications of the programmable DC power supplies:

Type Specifications Recommended instrument

equivalent

programmable DC power supply for electronic loads

equivalent

The following sections will indicate how to set up the equipment based on the type of verification that you are performing.

2-2 077104803 / June 2021

Constant voltage (CV) verification tests ................................... 3-1

Constant voltage verification

In this section:

Constant voltage (CV) verification tests

There are four verification tests in this series. These tests verify display panel accuracy, verify programmed voltage, measure output voltage changes based on load or no load, measure output voltage based on ac line voltage changes, and measure ripple and noise.

Section 3

Voltage programming and measurement accuracy verification

This test verifies that the voltage programming and measurement functions are within specifications.

Hazardous voltages may be present on all output and guard terminals. To prevent electrical shock that could cause injury or death, never make or break connections to any of the instruments used for this verification test while instruments are powered on. Turn off the 2260B instrument from the front panel or disconnect the main power cord from the rear of the instrument before handling cables. Putting the equipment into an output-off state does not guarantee that the outputs are powered off if a hardware or software fault occurs. Precautions must be taken to prevent a shock hazard by surrounding the test device and any unprotected leads (wiring) with double insulation for up to 800 volts depending on the power supply that you have, Category I.

Figure 1: 2260B Voltage adjustment devices

Section

al

3: Constant voltage verification Series 2260B Programmable Power Supplies Verification and Adjustment Manu

Before proceeding, make sure that the 2260B instrument is off.

To perform voltage programming and measurement accuracy:

1. Connect the ac power supply to the 2260B.

2. Connect the DMM on the PCS-1000 directly across the +S and -S terminals to an electronic dc load, as shown in the previous figure.

3. Turn on the 2260B and, if necessary, all of the other instruments.

4. Press the Set button on your 2260B and program the output voltage to 0.1 and the output current to its maximum value with the load off (see Series 2260B available models (on page 1-2

)).

5. On the 2260B press the Output button. Note that CV is displayed on the 2260B front panel and the output current reading on the PCS-1000 should be approximately zero.

6. Record the DMM output voltage reading and the voltage indicated on the 2260B. The readings should be within the limits specified in the test record form for the appropriate model (see

Verification test record forms (on page 5-1

) for the appropriate model, under Voltage

Programming and Measurement).

7. Program the output voltage to its maximum rated value (see Series 2260B available models (on page 1-2)).

8. Record the DMM output voltage reading and the voltage indicated on the 2260B.

The readings should be within the limits specified in the test record form for the appropriate model (see Verification test record forms (on page 5-1

) for the appropriate model, under Voltage

Programming and Measurement).

Verifying voltage programming and measurement accuracy is complete.

3-2 077104803 / June 2021

Series 2260B

Constant voltage verification

Programmable Power Supplies Verification and Adjustment Manual Section 3:

Constant voltage load regulation verification

This test measures the change in output voltage resulting from a change from full load to no load.

Hazardous voltages may be present on all output and guard terminals. To prevent electrical shock that could cause injury or death, never make or break connections to any of the instruments used for this verification test while instruments are powered on. Turn off the 2260B instrument from the front panel or disconnect the main power cord from the rear of the instrument before handling cables. Putting the equipment into an output-off state does not guarantee that the outputs are powered off if a hardware or software fault occurs. Precautions must be taken to prevent a shock hazard by surrounding the test device and any unprotected leads (wiring) with double insulation for up to 800 volts depending on the power supply that you have, Category I.

Figure 2: 2260B Constant voltage load regulation

Before proceeding, make sure that the 2260B instrument is off.

077104803 / June 2021 3-3

Section

Verification and Adjustment Manual

3: Constant voltage verification Series 2260B Programmable Power Supplies

To perform CV load regulation verification:

1. Connect the ac power supply to the 2260B.

2. Connect the DMM on the PCS-1000 directly across the +S and -S terminals to an electronic dc load, as shown in the previous figure.

3. Turn on the 2260B and, if necessary, all of the other instruments.

4. Press the Set button on your 2260B and program the output current to its maximum value and the output voltage to the maximum rated value (see Series 2260B available models

(on page

1-2)).

5. On the 2260B press the Output button.

6. On the electronic dc load instrument, set the output load to 1 A. Note that CV is displayed on the 2260B front panel. If CV is not displayed, adjust the load so that the output current drops and CV is displayed.

7. Record the DMM output voltage reading.

8. Open the load and record the DMM voltage reading.

The difference between the DMM readings in steps 7 and 8 is the load effect, which should not exceed the value listed in the test record form (see Verification test record forms (on page 5-1

) for the

appropriate model, under CV load regulation).

Verifying CV load regulation is complete.

3-4 077104803 / June 2021

Series 2260B

Constant voltage verification

Programmable Power Supplies Verification and Adjustment Manual Section 3:

Constant voltage line regulation verification

This test measures the change in output voltage resulting from a change in ac line voltage from the minimum to maximum value within the line voltage specifications.

Hazardous voltages may be present on all output and guard terminals. To prevent electrical shock that could cause injury or death, never make or break connections to any of the instruments used for this verification test while instruments are powered on. Turn off the 2260B instrument from the front panel or disconnect the main power cord from the rear of the instrument before handling cables. Putting the equipment into an output-off state does not guarantee that the outputs are powered off if a hardware or software fault occurs. Precautions must be taken to prevent a shock hazard by surrounding the test device and any unprotected leads (wiring) with double insulation for up to 800 volts depending on the power supply that you have, Category I.

Figure 3: 2260B Constant voltage line regulation

Before proceeding, make sure that the 2260B instrument is off.

077104803 / June 2021 3-5

Section

Verification and Adjustment Manual

3: Constant voltage verification Series 2260B Programmable Power Supplies

To perform CV line regulation verification:

1. Connect the ac power supply to the 2260B.

2. Connect the DMM on the PCS-1000 directly across the +S and -S terminals to an electronic dc load, as shown in the previous figure.

3. Turn on the 2260B and, if necessary, all of the other instruments.

4. Set the variable ac voltage to nominal line voltage.

5. Press the Set button on the 2260B and program the output current to its maximum value and the output voltage to its maximum rated value (see Series 2260B available models (on page 1-2

)).

6. On the 2260B press the Output button.

7. On the electronic dc load instrument, set the electronic output load to 1 A. Note that CV is displayed on the 2260B front panel. If CV is not displayed, adjust the load so that the output current drops and CV is displayed.

8. Adjust the ac power source to the low-line voltage (85 V ac for 100/120 nominal line; 170 V ac for 200/240 nominal line).

9. Record the DMM output voltage reading.

10. Adjust the ac power source to the high-line voltage (132 V ac for 100/120 nominal line; 265 V ac for 200/240 nominal line).

11. Record the DMM output voltage reading.

The difference between the DMM reading in steps 9 and 11 is the source effect, which should not exceed the value listed in the test record form (see Verification test record forms (on page 5-1

) for the

appropriate model, under CV line regulation).

Verifying CV line regulation is complete.

3-6 077104803 / June 2021

Series 2260B

fication

Programmable Power Supplies Verification and Adjustment Manual Section 3: Constant voltage veri

Constant voltage ripple and noise verification

This test measures the dc output voltage with the (10:1) 50 Ω probe.

Hazardous voltages may be present on all output and guard terminals. To prevent electrical shock that could cause injury or death, never make or break connections to any of the instruments used for this verification test while instruments are powered on. Turn off the 2260B instrument from the front panel or disconnect the main power cord from the rear of the instrument before handling cables. Putting the equipment into an output-off state does not guarantee that the outputs are powered off if a hardware or software fault occurs. Precautions must be taken to prevent a shock hazard by surrounding the test device and any unprotected leads (wiring) with double insulation for up to 800 volts depending on the power supply that you have, Category I.

Figure 4: 2260B Constant voltage ripple noise verification

Before proceeding, make sure that the 2260B instrument is off.

077104803 / June 2021 3-7

Section

Verification and Adjustment Manual

3: Constant voltage verification Series 2260B Programmable Power Supplies

To perform CV ripple and noise verification:

1. Connect the ac power supply to the 2260B.

2. Connect the DMM on the PCS-1000 directly across the +S and -S terminals to an electronic dc load, as shown in the previous figure.

3. Turn on the 2260B and, if necessary, all of the other instruments.

4. On the oscilloscope, set the ac coupling to 20 MHz bandwidth, the scale to 10 mV Sampling mode to average, and the measurement to peak-to-peak.

5. Press the Set button on your 2260B and program the power supply to output current to its maximum value and the output voltage to its maximum rated value (see

Series 2260B available

models (on page 1-2)).

6. On the 2260B press the Output button. Let the oscilloscope run for 20 seconds in order to generate enough measurement points. The result should not exceed the peak-to-peak limits in the test record form.

7. Use the DMM to measure the RMS noise voltage using ac voltage (see next figure).

The result should not exceed the RMS limits in the test record form (see Verification test record forms (on page 5-1) for the appropriate model, under CV ripple and noise - RMS).

Verifying CV ripple and noise is complete.

3-8 077104803 / June 2021

Constant current (CC) verification tests ................................... 4-1

Constant current verification

In this section:

Constant current (CC) verification tests

There are four verification tests in this series. These tests verify display panel accuracy, verify programmed voltage, measure output voltage changes based on load or no load, measure output voltage based ac line voltage changes, and measure output noise.

Section 4

Current programming and measurement accuracy verification

This test verifies that the current programming and measurement functions are within specifications.

Hazardous voltages may be present on all output and guard terminals. To prevent electrical shock that could cause injury or death, never make or break connections to any of the instruments used for this verification test while instruments are powered on. Turn off the 2260B instrument from the front panel or disconnect the main power cord from the rear of the instrument before handling cables. Putting the equipment into an output-off state does not guarantee that the outputs are powered off if a hardware or software fault occurs. Precautions must be taken to prevent a shock hazard by surrounding the test device and any unprotected leads (wiring) with double insulation for up to 800 volts depending on the power supply that you have, Category I.

Figure 5: 2260B Current analog adjustment devices

Section

Verification and Adjustment Manual

4: Constant current verification Series 2260B Programmable Power Supplies

Before proceeding, make sure that the 2260B instrument is off.

To perform current programming and measurement accuracy:

1. Connect the ac power supply.

2. Connect the current input on the PCS-1000 across the +S and -S terminals through an electronic dc load, as shown in the previous figure.

3. Turn on the 2260B and, if necessary, all of the other instruments.

4. Press the Set button on the 2260B, program the output voltage to 15 volts and set the output current to zero (see Series 2260B available models (on page 1-2

), if needed).

5. Set the electronic load to a short and on the 2260B press the Output button. Note that CC is displayed on the 2260B front panel.

6. Record the precision current shunt (PCS-1000) input current readings and the current indicated on the 2260B. The readings should be within the limits specified in the test record form for the appropriate model (see Verification test record forms (on page 5-1

) for the appropriate model,

under Current Programming and Measurement, if needed).

7. Program the output current to its maximum rated value (see Series 2260B available models (on page 1-2), if needed).

8. Set the electronic load to a short.

9. Record the precision current shunt (PCS-1000) input current readings and the current indicated on the 2260B.

The readings should be within the limits specified in the test record form for the appropriate model (see Verification test record forms (on page 5-1

) for the appropriate model, under Current

Programming and Measurement, if needed).

Verifying Current Programming and Measurement Accuracy is complete.

4-2 077104803 / June 2021

Series 2260B

Constant current verification

Programmable Power Supplies Verification and Adjustment Manual Section 4:

Constant current load regulation verification

This test measures the change in output current resulting from a change from full scale to short circuit.

Hazardous voltages may be present on all output and guard terminals. To prevent electrical shock that could cause injury or death, never make or break connections to any of the instruments used for this verification test while instruments are powered on. Turn off the 2260B instrument from the front panel or disconnect the main power cord from the rear of the instrument before handling cables. Putting the equipment into an output-off state does not guarantee that the outputs are powered off if a hardware or software fault occurs. Precautions must be taken to prevent a shock hazard by surrounding the test device and any unprotected leads (wiring) with double insulation for up to 800 volts depending on the power supply that you have, Category I.

Figure 6: 2260B Constant current load regulation

Before proceeding, make sure that the 2260B instrument is off.

077104803 / June 2021 4-3

Section

Verification and Adjustment Manual

4: Constant current verification Series 2260B Programmable Power Supplies

To perform CC load regulation verification:

1. Connect the ac power supply.

2. Connect the current input on the PCS-1000 across the +S and -S terminals through an electronic dc load, as shown in the previous figure.

3. Turn on the 2260B and, if necessary, all of the other instruments.

4. With the electronic load in CR mode, press the Set button and program the 2260B output voltage to 15 volts.

5. Press the Output button on your 2260B.

6. Using the electronic load, set the output current to the maximum rated output. Note that CC is displayed on the 2260B front panel. If CC is not displayed, adjust the load so that the voltage drops and CC is displayed.

7. Record the PCS-1000 input current reading.

8. Short the electronic load and record the indicated current reading on the PCS-1000.

The difference in the current readings in steps 7 and 8 is the load effect, which should not exceed the value listed in the test record form for the appropriate model (see Verification test record forms

(on

page 5-1) for the appropriate model, under CC load regulation, if needed).

Verifying CC load regulation is complete.

4-4 077104803 / June 2021

Series 2260B

t verification

Programmable Power Supplies Verification and Adjustment Manual Section 4: Constant curren

Constant current line regulation verification

This test measures the change in output current that results from a change in ac line voltage from the minimum to maximum value within the line voltage specifications.

Hazardous voltages may be present on all output and guard terminals. To prevent electrical shock that could cause injury or death, never make or break connections to any of the instruments used for this verification test while instruments are powered on. Turn off the 2260B instrument from the front panel or disconnect the main power cord from the rear of the instrument before handling cables. Putting the equipment into an output-off state does not guarantee that the outputs are powered off if a hardware or software fault occurs. Precautions must be taken to prevent a shock hazard by surrounding the test device and any unprotected leads (wiring) with double insulation for up to 800 volts depending on the power supply that you have, Category I.

Figure 7: 2260B Constant current line regulation

Before proceeding, make sure that the 2260B instrument is off.

077104803 / June 2021 4-5

Section

Verification and Adjustment Manual

4: Constant current verification Series 2260B Programmable Power Supplies

To perform CC line regulation verification:

1. Connect the ac power supply.

2. Connect the PCS-1000 current input across the +S and -S terminals through an electronic dc load, as shown in the previous figure.

3. Turn on the 2260B and, if necessary, all of the other instruments.

4. Set the variable ac voltage to nominal line voltage.

5. On your 2260B press the Set button and program the output current to its maximum rated value (see Series 2260B available models (on page 1-2

), if needed).

6. Press the Output button on your 2260B.

7. With the electronic load in CR mode short the load and program the 2260B output voltage to 15 volts. Note that CC is displayed on the 2260B front panel. If CC is not displayed, adjust the load so that the voltage drops and CC is displayed.

8. Adjust the ac power source to the low-line voltage (85 V ac for 100/120 nominal line; 170 V ac for 200/240 nominal line).

9. Record the PCS-1000 input current reading.

10. Adjust the ac power source to the high-line voltage (132 V ac for 100/120 nominal line; 265 V ac for 200/240 nominal line).

11. Record the PCS-1000 input current reading.

The difference between the PCS-1000 reading in steps 9 and 11 is the source effect, which should not exceed the value listed in the test record form (see Verification test record forms (on page 5-1

) for

the appropriate model, under CV line regulation, if needed).

Verifying CC line regulation is complete.

4-6 077104803 / June 2021

Series 2260B

Constant current verification

Programmable Power Supplies Verification and Adjustment Manual Section 4:

Constant current noise verification

This test measures the ac output voltage with the PCS-1000 and DMM.

Hazardous voltages may be present on all output and guard terminals. To prevent electrical shock that could cause injury or death, never make or break connections to any of the instruments used for this verification test while instruments are powered on. Turn off the 2260B instrument from the front panel or disconnect the main power cord from the rear of the instrument before handling cables. Putting the equipment into an output-off state does not guarantee that the outputs are powered off if a hardware or software fault occurs. Precautions must be taken to prevent a shock hazard by surrounding the test device and any unprotected leads (wiring) with double insulation for up to 800 volts depending on the power supply that you have, Category I.

Figure 8: 2260B Constant current noise verification

Before proceeding, make sure that the 2260B instrument is off.

077104803 / June 2021 4-7

Section

Verification and Adjustment Manual

4: Constant current verification Series 2260B Programmable Power Supplies

To perform CC noise verification:

1. Connect the ac power supply.

2. Connect the PCS-1000 current input across the +S and -S terminals through an electronic dc load (see previous figure).

3. Turn on the 2260B and, if necessary, all of the other instruments.

4. Press the Set button on your 2260B and program the power supply output current to its maximum value and the output voltage to 15 volts (see Series 2260B available models (on page 1-2

), if

needed).

5. On the 2260B press the Output button.

6. Use the DMM to measure the RMS noise voltage using ac voltage (see previous figure).

The result should not exceed the RMS limits in the test record form (see Verification test record forms (on page 5-1) for the appropriate model, under CV ripple and noise - RMS, if needed).

Verifying CC ripple and noise is complete.

4-8 077104803 / June 2021

800 Volt verification record ....................................................... 5-8

Section 5

Verification test record forms

In this section:

30 Volt verification test record .................................................. 5-1

80 Volt verification test record .................................................. 5-3

250 Volt verification record ....................................................... 5-6

Section

Verification and Adjustment Manual

Model  2260B-30-36

2260B-30-72

2260B-30-108

Serial number:

Verified by

Name:

Company/contact:

Year:

Month:

Day:

Environment

Temperature:

Humidity:

Minimum voltage out

All

-10 mV

+10 mV

Measurement accuracy

All

-20 mV

+20 mV

Rated voltage out

All

29.960 V

30.040 V

Measurement accuracy

All

29.95 V

30.5 V

All

-20 mV

+20 mV

Peak-to-peak

30-36

N/A 60 mV

30-72

N/A 80 mV

30-108

N/A 100 mV

RMS

30-36

N/A 7 mV

30-72

N/A 11 mV

30-108

N/A 14 mV

5: Verification test record forms Series 2260B Programmable Power Supplies

30 Volt verification test record

Print this page and record your verification results that can be used for reference in the future. Make sure to keep this record with your power supply.



Constant voltage tests:

Voltage programming and measurement

CV load regulation Model

CV line regulation Model

All -18 mV +18 mV

Model

Minimum specifications

Results Maximum specifications



CV ripple and noise Model

5-2 077104803 / June 2021

Minimum specifications

Results Maximum specifications

Series 2260B

cation test record forms

Minimum current out

30-36

-30 mA

+30 mA

30-72

-60 mA

+60 mA

30-108

-100 mA

+100 mA

Measurement accuracy

30-36

-40 mA

+40 mA

30-72

-70 mA

+70 mA

30-108

-100 mA

+100 mA

Rated current out

30-36

35.934 A

36.066 A

30-72

71.898 A

72.102 A

30-108

107.862 A

108.138 A

Measurement accuracy

30-36

35.924 A

36.076 A

30-72

71.858 A

72.142 A

30-108

107.79 A

108.21 A

30-36

-41 mA

+41 mA

30-72

-77 mA

+77mA

30-108

-113 mA

+113 mA

30-36

-41 mA

+41 mA

30-72

-77 mA

+77mA

30-108

-113 mA

+113 mA

Programmable Power Supplies Verification and Adjustment Manual Section 5: Verifi

Constant current tests:

Current programming and measurement

Model

Minimum specifications

Results Maximum specifications

CC load regulation Model

CC line regulation Model

Minimum specifications

Results Maximum specifications

077104803 / June 2021 5-3

Section

Verification and Adjustment Manual

Model  2260B-80-13

2260B-80-27

2260B-80-40

Serial number:

Verified by

Name:

Company/contact:

Year:

Month:

Day:

Environment

Temperature:

Humidity:

Minimum voltage out

All

-10 mV

+10 mV

Measurement accuracy

All

-20 mV

+20 mV

Rated voltage out

All

79.91 V

80.090 V

Measurement accuracy

All

79.9 V

80.1 V

All

-45 mV

+45 mV

All

-43 mV

+43 mV

Peak-to-peak

80-13

N/A 60 mV

80-27

N/A 80 mV

80-40

N/A 100 mV

RMS

80-13

N/A 7 mV

80-27

N/A 11 mV

80-40

N/A 14 mV

5: Verification test record forms Series 2260B Programmable Power Supplies

80 Volt verification test record

Print this page and record your verification results that can be used for reference in the future. Make sure to keep this record with your power supply.

Constant voltage tests:

Voltage programming and measurement

CV load regulation Model

Model

Minimum specifications



Results Maximum specifications



CV line regulation Model

CV ripple and noise Model

Minimum specifications

Results Maximum specifications

5-4 077104803 / June 2021

Series 2260B

Verification test record forms

Minimum current out

80-13

-10 mA

+10 mA

80-27

-30 mA

+30 mA

80-40

-40 mA

+40 mA

Measurement accuracy

80-13

-20 mA

+20 mA

80-27

-40 mA

+40 mA

80-40

-50 mA

+50 mA

Rated current out

80-13

12.87 A

13.13 A

80-27

26.943 A

27.057 A

80-40

39.92 A

40.080 A

Measurement accuracy

80-13

12.967 A

13.033 A

80-27

26.933 A

27.067 A

80-40

39.91 A

30.09 A

80-13

-18 mA

+18 mA

80-27

-32 mA

+32 mA

80-40

-45 mA

+45 mA

Programmable Power Supplies Verification and Adjustment Manual Section 5:

Constant current tests:

Current programming and measurement

Model

Minimum specifications

Results Maximum specifications

CC load regulation Model

Minimum

Results Maximum specifications

specifications

CC line regulation Model

Minimum

Results Maximum specifications

specifications

80-13 -18 mA +18 mA

80-27 -32 mA +32 mA

80-40 -45 mA +45 mA

077104803 / June 2021 5-5

Section

Verification and Adjustment Manual

Model  2260B-250-4

2260B-250-9

2260B-250-13

Serial number:

Verified by

Name:

Company/contact:

Year:

Month:

Day:

Environment

Temperature:

Humidity:

Minimum voltage out

All

-200 mV

+200 mV

Measurement accuracy

All

-200 mV

+200 mV

Rated voltage out

All

249.55 V

250.45 V

Measurement accuracy

All

249.55 V

250.45 V

All

-130 mV

+130 mV

All

-128 mV

+128 mV

Peak-to-peak

250-4

N/A 80 mV

250-9

N/A 100 mV

250-13

N/A 120 mV

RMS

250-4

N/A 15 mV

250-9

N/A 15 mV

250-13

N/A 15 mV

5: Verification test record forms Series 2260B Programmable Power Supplies

250 Volt verification record

Print this page and record your verification results that can be used for reference in the future. Make sure to keep this record with your power supply.

Constant voltage tests:

Voltage programming and measurement

CV load regulation Model

CV line regulation Model

Model

Minimum specifications



Results Maximum specifications



CV ripple and noise Model

5-6 077104803 / June 2021

Minimum specifications

Results Maximum specifications

Series 2260B

Verification test record forms

Minimum current out

250-4

-5 mA

+5 mA

250-9

-10 mA

+10 mA

250-13

-15 mA

+15 mA

Measurement accuracy

250-4

-5 mA

+5 mA

250-9

-10 mA

+10 mA

250-13

-20 mA

+20 mA

Rated current out

250-4

3.991 A

4.001 A

250-9

8.9810 A

9.0190 A

250-13

12.972 A

13.028 A

Measurement accuracy

250-4

3.991 mA

4.001 mA

250-9

8.981 A

9.019 A

250-13

12.967 A

13.033 A

250-4

-9.000 mA

+9.000 mA

250-9

-14.000 mA

+14.000 mA

250-13

-18.00 mA

+18.00 mA

250-4

-9.5 mA

+9.5 mA

250-9

-14 mA

+14 mA

250-13

-18.5 mA

+18.5 mA

Programmable Power Supplies Verification and Adjustment Manual Section 5:

Constant current tests:

Current programming and measurement

Model

Minimum specifications

Results Maximum specifications

CC load regulation Model

CC line regulation Model

Minimum specifications

Results Maximum specifications

077104803 / June 2021 5-7

Section

Verification and Adjustment Manual

Model  2260B-800-1

2260B-800-2

2260B-800-4

Serial number:

Verified by

Name:

Company/contact:

Year:

Month:

Day:

Environment

Temperature:

Humidity:

Minimum voltage out

All

-400 mV

+400 mV

Measurement accuracy

All

-400 mV

+400 mV

Rated voltage out

All

798.8 V

801.2 V

Measurement accuracy

All

798.8 V

801.2 V

All

-405 mV

+405 mV

All

-403 mV

+403 mV

Peak-to-peak

800-1

N/A 150 mV

800-2

N/A 200 mV

800-4

N/A 200 mV

RMS

800-1

N/A 30 mV

800-2

N/A 30 mV

800-4

N/A 30 mV

5: Verification test record forms Series 2260B Programmable Power Supplies

800 Volt verification record

Print this page and record your verification results that can be used for reference in the future. Make sure to keep this record with your power supply.

Constant voltage tests:

Voltage programming and measurement

CV load regulation Model

Model

Minimum specifications



Results Maximum specifications



CV line regulation Model

CV ripple and noise Model

Minimum specifications

Results Maximum specifications

5-8 077104803 / June 2021

Series 2260B

Verification test record forms

Minimum current out

800-1

-2 mA

+2 mA

800-2

-4 mA

+4 mA

800-4

-6 mA

+6 mA

Measurement accuracy

800-1

-2 mA

+2 mA

800-2

-4 mA

+4 mA

800-4

-6 mA

+6 mA

Rated current out

800-1

0.997 A

1.003 A

800-2

1.994 A

2.006 A

800-4

3.936 A

4.064 A

Measurement accuracy

800-1

0.997 A

1.003 A

800-2

1.994 A

2.006 A

800-4

3.936 A

4.064 A

800-1

-6.00 mA

+6.00 mA

800-2

-7.00 mA

+7.00 mA

800-4

-9.00 mA

+9.00 mA

800-1

-6.00 mA

+6.00 mA

800-2

-7.00 mA

+7.00 mA

800-4

-9.00 mA

+9.00 mA

Constant current tests:

Current programming and measurement

Programmable Power Supplies Verification and Adjustment Manual Section 5:

Model

Minimum specifications

Results Maximum specifications

CC load regulation Model

CC line regulation Model

Minimum specifications

Results Maximum specifications

077104803 / June 2021 5-9

Adjustment equipment ............................................................. 6-1

Precision current shunt

3 A (0.1 Ω) 0.01% TC = 3 ppm / °C

GW Instek PCS-1000 or

30 A (0.01 Ω) 0.01% TC = 10 ppm / °C

300 A (0.001 Ω) 0.02% TC = 10 ppm / °C

Electronic loads

80 V, 280 A minimum with transient capability and a slew rate of 2.8 A/μs or better.

Various manufacturers of

500 V, 40 A minimum with transient capability and a slew rate of 0.4 A/μs or better.

850 V, 40 A minimum with transient capability and a slew rate of 0.4 A/μs or better.

DC power supply

Voltage resolution: 1 mV

Keithley programmable

supply 2220-30-01

Accuracy: <0.05% mV of reading Voltage resolution: 0.1 mV

Keithley DMM 7510 or

Accuracy: <0.01% mV of reading

In this section:

Adjustment equipment

The following is a list of the recommended equipment used for calibrating the programmable DC power supplies:

Section 6

2260B Adjustment equipment

Type Specifications Recommended instrument

Digital multimeter

equivalent

programmable DC electronic loads

dual-channel DC power

equivalent

Analog interface adjustment procedure .................................... 7-3

In this section:

Remove top cover .................................................................... 7-1

Confirm location of adjustment points ...................................... 7-2

Remove top cover

Hazardous voltages may be present on all output and guard terminals. To prevent electrical shock that could cause injury or death, never make or break connections to any of the instruments used for this adjustment while instruments are powered on. Turn off all of the instruments from the front panel or disconnect the main power cord from the rear of the instrument before handling cables. Putting the equipment into an output-off state does not guarantee that the outputs are powered off if a hardware or software fault occurs. Precautions must be taken to prevent a shock hazard by surrounding the test device and any unprotected leads (wiring) with double insulation for up to 800 volts depending on the power supply that you have, Category I.

Section 7

Analog interface adjustment

Before you can make adjustments on the instrument, you will need to remove the 2260B top cover.

On the 360 watt models (2260B-30-36, 2260B-80-13, 2260B-250-4, and 2260B-800-01), note that there are nine screws that you will need to remove in order to remove the top cover (see next figure).

The next figure only shows seven screws.

Section

Verification and Adjustment Manual

7: Analog interface adjustment Series 2260B Programmable Power Supplies

On the 720 watt models (2260B-30-72, 2260B-80-27, 2260B-250-9, 2260B-800-2), there are ten screws that you will need to remove.

On the 1080 watt models (2260B-30-108, 2260B-80-40, 2260B-250-13, 2260B-800-4), there are eleven screws that you will need to remove.

Figure 9: 2260B Top cover

Confirm location of adjustment points

The location of the adjustment points, on the 2260B circuit board (VR400 and VR401), are shown in the next figure:

Figure 10: 2260B circuit board

7-2 077104803 / June 2021

Series 2260B

Analog interface adjustment

Programmable Power Supplies Verification and Adjustment Manual Section 7:

Make sure that you connect the following devices as indicated in the next figure. Also, make sure that you set the Model 2220-30-1 DC power supply, channel one, and channel two to 10.00 V.

Figure 11: Analog adjustment devices

Analog interface adjustment procedure

To start the adjustment procedure:

1. Turn on the programmable DC power supply (Series 2260B) by pressing the Function key.

When the function key is illuminated, the display indicates "F - 01." Additionally, note that the "x" in

the diagram below indicates that the value is not fixed.

2. Rotate the Voltage knob until the display indicates "F - 00".

077104803 / June 2021 7-3

Section

Verification and Adjustment Manual

2260B-30-36

3036

2260B-30-72

3072

2260B-30-108

3010

2260B-80-13

8013

2260B-80-27

8027

2260B-80-40

8040

2260B-250-4

2545

2260B-250-9

2509

2260B-250-13

2515

2260B-800-1

8014

2260B-800-2

8028

2260B-800-4

8043

7: Analog interface adjustment Series 2260B Programmable Power Supplies

3. Press the Current knob to select the numeric indicator.

4. Use the Current knob to select the appropriate password for the model that you are calibrating. The following is a list of models and passwords:

Model number Password

5. Press the Current knob to enter the password (note that the highlighted numeral is the one that you are changing).

6. Once the number needed is highlighted, press the Current knob to move to the next numeric position.

7. Press the Voltage knob to enter the password.

The display will indicate "C000".

8. Turn on the external power supply (the 2220-30-01) and set the output to 10.000 V ±0.001 V, for both channel 1 and 2.

9. Press the Voltage knob to prepare to execute the external output voltage adjustment (C010).

Make sure that the DC electronic load instrument is turned off.

7-4 077104803 / June 2021

Series 2260B

Analog interface adjustment

2260B-30-36

29.994

30.006

2260B-30-108

29.994

30.006

2260B-80-13

79.984

80.016

2260B-80-27

79.984

80.016

2260B-80-40

79.984

80.016

2260B-250-4

249.950

250.050

2260B-250-9

249.950

250.050

2260B-800-1

799.840

800.160

2260B-800-2

799.840

800.160

2260B-800-4

799.840

800.160

Programmable Power Supplies Verification and Adjustment Manual Section 7:

10. Press the Voltage knob (C011 is displayed); the 2260B instrument Output button illuminates and

CV is displayed.

Make sure that the reading on the DMM is within the specified voltage range. If not, adjust the voltage resistor (VR401) on the 2260B instrument (see Confirm location of adjustment points

(on

page 7-2)).

The following is a list of models with adjustment ranges for point VR401:

Model number minimum volts maximum volts

2260B-30-72 29.994 30.006

2260B-250-13 249.950 250.050

11. Press the Voltage knob to return to external voltage adjustment (C010).

12. Rotate the Voltage knob until it indicates C020, in order to prepare to execute the external output

current adjustment.

Make sure that the load key and short key on the DC electronic load instrument are turned on.

077104803 / June 2021 7-5

Section

Verification and Adjustment Manual

2260B-30-36

35.9928

36.0072

2260B-30-72

71.9856

72.0144

2260B-30-108

107.9784

108.0216

2260B-80-13

13.4973

13.5027

2260B-80-27

26.9946

27.0054

2260B-80-40

40.4919

40.5081

2260B-250-9

8.9982

9.0018

2260B-250-13

13.4973

13.5027

2260B-800-1

1.4397

1.4403

2260B-800-2

2.8794

2.8806

2260B-800-4

4.3191

4.3209

7: Analog interface adjustment Series 2260B Programmable Power Supplies

13. Press the Voltage knob (C021 is displayed); the 2260B Output button illuminates and CC is

displayed.

Make sure that the reading on the PCS-1000 current meter is within the specified current range. If not, adjust the current resistor (VR400) on the 2260B instrument (see

Confirm location of adjustment

points (on page 7-2)).

The following is a list of models with adjustment ranges for point VR401:

Model number minimum current maximum current

2260B-250-4 4.4991 4.5009

14. Press the Voltage knob to return to the external current adjustment (C020).

15. Rotate the Voltage knob to exit the external current adjustment display (C030 is displayed).

16. Press the Voltage knob to return to the main adjustment display.

7-6 077104803 / June 2021

Series 2260B

Analog interface adjustment

Programmable Power Supplies Verification and Adjustment Manual Section 7:

17. Rotate the Current knob to exit adjustment mode (C000:2).

18. Press the Voltage knob to exit adjustment mode.

The "x" in the diagram above indicates that the value is not fixed.

Turn off the 2600B instrument and put the top cover back on.

Analog interface adjustment is complete.

077104803 / June 2021 7-7

Constant voltage (CV) adjustment procedure .......................... 8-2

In this section:

Connect device equipment ....................................................... 8-1

Connect device equipment

Hazardous voltages may be present on all output and guard terminals. To prevent electrical shock that could cause injury or death, never make or break connections to any of the instruments used for this adjustment while instruments are powered on. Turn off all of the instruments from the front panel or disconnect the main power cord from the rear of the instrument before handling cables. Putting the equipment into an output-off state does not guarantee that the outputs are powered off if a hardware or software fault occurs. Precautions must be taken to prevent a shock hazard by surrounding the test device and any unprotected leads (wiring) with double insulation for up to 800 volts depending on the power supply that you have, Category I.

Section 8

Constant voltage adjustment

Make sure that you connect the following devices as indicated in the next figure.

Figure 12: 2260B Constant voltage adjustment devices

Section

Verification and Adjustment Manual

2260B-30-36

3036

2260B-30-72

3072

2260B-30-108

3010

2260B-80-13

8013

2260B-80-27

8027

2260B-80-40

8040

2260B-250-4

2545

2260B-250-9

2509

2260B-250-13

2515

2260B-800-1

8014

2260B-800-2

8028

2260B-800-4

8043

8: Constant voltage adjustment Series 2260B Programmable Power Supplies

Constant voltage (CV) adjustment procedure

To start the adjustment procedure:

1. Turn on the programmable DC power supply (Series 2260B) by pressing the Function key.

The function key lights up, the display indicates "F - 01." Additionally, note that the "x" in the diagram

below indicates that the value is not fixed.

2. Rotate the voltage knob until it indicates "F - 00".

3. Use the Current knob to select the appropriate password for the model that you are calibrating. The following is a list of models and passwords:

Model number Password

8-2 077104803 / June 2021

Series 2260B

Constant voltage adjustment

Programmable Power Supplies Verification and Adjustment Manual Section 8:

4. Press the voltage knob to enter the enter the password.

The display will indicate "C000".

5. Use the current knob to enter "constant voltage" adjustment mode. To enter adjustment mode, rotate the current knob until "1" is displayed on the bottom display (C000:1).

6. Press the voltage knob to enter voltage adjustment (C110).

7. Press the voltage knob two times to enter the voltage offset adjustment (C111).

8. Press the voltage knob to set the offset voltage value (C112).

The "x" in the diagram above indicates that the value is not fixed.

077104803 / June 2021 8-3

Section

Adjustment Manual

8: Constant voltage adjustment Series 2260B Programmable Power Supplies Verification and

9. Rotate the current knob to set the offset value on the 2260B display so that it is the same as the reading on the PCS-1000 voltmeter.

10. Press the voltage knob to enter the output voltage middle adjustment (C113).

11. Press the voltage knob to set the middle voltage value.

The "x" in the diagram above indicates that the value is not fixed.

12. Rotate the current knob to set the middle voltage value on the 2260B display so that it is the same as the reading on the PCS-1000 voltmeter.

13. Press the voltage knob to enter the output voltage full-scale adjustment (C115).

14. Press the voltage knob to set the full-scale voltage value (C116).

The "x" in the diagram above indicates that the value is not fixed.

15. Rotate the current knob to set the full-scale voltage value on the 2260B display so that it is the same as the reading on the PCS-1000 voltmeter.

16. Press the voltage knob to enter the OVP (overvoltage protection) adjustment (C117).

8-4 077104803 / June 2021

Series 2260B

Constant voltage adjustment

Programmable Power Supplies Verification and Adjustment Manual Section 8:

17. Press the voltage knob to start the automatic OVP adjustment (C118).

The display will indicate "OK" when the adjustment is complete for approximately five seconds.

Additionally, the output turns on and the CV indicator is lit. Also, the instrument automatically returns to C110 after the automatic OVP adjustment ends.

18. Rotate the voltage knob to go to save mode (C130).

19. Rotate the current knob until "1" is shown on the bottom display (C130:1)

20. Press the voltage knob to save the adjustment results.

The display will indicate "OK" and the instrument will automatically return to "C000" when the

adjustment value is saved.

21. Rotate the current knob to go to "exit adjustment" mode (C000:2).

077104803 / June 2021 8-5

Section

Verification and Adjustment Manual

8: Constant voltage adjustment Series 2260B Programmable Power Supplies

22. Press the voltage knob to exit adjustment mode.

The "x" in the diagram above indicates that the value is not fixed.

Constant voltage adjustment is complete.

8-6 077104803 / June 2021

Constant current (CC) adjustment procedure ........................... 9-2

In this section:

Connect device equipment ....................................................... 9-1

Connect device equipment

Hazardous voltages may be present on all output and guard terminals. To prevent electrical shock that could cause injury or death, never make or break connections to any of the instruments used for this adjustment while instruments are powered on. Turn off all of the instruments from the front panel or disconnect the main power cord from the rear of the instrument before handling cables. Putting the equipment into an output-off state does not guarantee that the outputs are powered off if a hardware or software fault occurs. Precautions must be taken to prevent a shock hazard by surrounding the test device and any unprotected leads (wiring) with double insulation for up to 800 volts depending on the power supply that you have, Category I.

Section 9

Constant current adjustment

Make sure that you connect the following devices as indicated in the next figure.

Figure 13: Constant current adjustment devices

Section

Verification and Adjustment Manual

2260B-30-36

3036

2260B-30-72

3072

2260B-30-108

3010

2260B-80-13

8013

2260B-80-27

8027

2260B-80-40

8040

2260B-250-4

2545

2260B-250-9

2509

2260B-250-13

2515

2260B-800-1

8014

2260B-800-2

8028

2260B-800-4

8043

9: Constant current adjustment Series 2260B Programmable Power Supplies

Constant current (CC) adjustment procedure

To start the adjustment procedure:

1. Turn on the programmable DC power supply (Series 2260B) by pressing the Function key.

When the function key is illumintaed, the display indicates "F - 01." Additionally, note that the "x" in

the diagram below indicates that the value is not fixed.

2. Rotate the voltage knob until it indicates "F - 00".

3. Use the Current knob to select the appropriate password for the model that you are calibrating. The following is list of models and passwords:

Model number Password

9-2 077104803 / June 2021

Series 2260B

Constant current adjustment

Programmable Power Supplies Verification and Adjustment Manual Section 9:

4. Press the voltage knob to enter analog interface adjustment.

The display will indicate "C000" when completed.

5. Use the current knob to enter "constant voltage" adjustment mode. To enter the adjustment mode, rotate the current knob until "1" is displayed on the bottom display (C000:1).

6. Press the voltage knob to enter voltage adjustment (C110).

7. Rotate the voltage knob to go to current adjustment (C120).

8. Press the voltage knob to enter the output current offset adjustment (C121).

9. Press the voltage knob to set the offset value.

The "x" in the diagram above indicates that the value is not fixed.

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Section

nual

9: Constant current adjustment Series 2260B Programmable Power Supplies Verification and Adjustment Ma

10. Rotate the current knob to set the offset value on the 2260B display so that it is the same as the reading on the PCS-1000 current meter.

11. Press the voltage knob to enter the output current half-scale adjustment (C123).

12. Press the voltage knob to set the half-scale current value (C124).

The "x" in the diagram above indicates that the value is not fixed.

13. Rotate the current knob to set the half-scale current value on the 2260B display so that it is the same as the reading on the PCS-1000 current meter.

14. Press the voltage knob to enter the output current full-scale adjustment (C125).

15. Press the voltage knob to set the full-scale value (C126).

The "x" in the diagram above indicates that the value is not fixed.

16. Rotate the current knob to set the full-scale value on the 2260B display so that it is the same as the reading on the PCS-1000 current meter.

17. Press the voltage knob to enter the OCP (overcurrent protection) adjustment (C127).

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Series 2260B

Constant current adjustment

Programmable Power Supplies Verification and Adjustment Manual Section 9:

18. Press the voltage knob to start the automatic OCP adjustment (C128).

The display will indicate "OK" when the adjustment is complete. Additionally, the output turns on and

the CC indicator is lit. Also, the instrument automatically returns to C120 after the automatic OCP

adjustment ends.

19. Rotate the voltage knob to go to save mode (C130).

20. Rotate the current knob until "1" is shown on the bottom display (C130:1)

21. Press the voltage knob to save the adjustment results.

The display will indicate "OK" and the instrument will automatically return to "C000" when the

adjustment value is saved.

22. Rotate the current knob to go to "exit adjustment" mode (C000:2).

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Section

Verification and Adjustment Manual

9: Constant current adjustment Series 2260B Programmable Power Supplies

23. Press the voltage knob to exit adjustment mode.

The "x" in the diagram above indicates that the value is not fixed.

Constant current adjustment is complete.

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In this section:

Adjustment codes ................................................................... 10-1

F-01

X

Power applied; Function key lights up

F-00

0000

Enter adjustment mode

C000

0

Password entered; instrument ready for adjustment

C000

1

Enter constant voltage adjustment mode

C000

2

Exit adjustment mode

C010

- - - -

Standby to execute external voltage adjustment

C011

- - - -

Output button illuminates and CV is displayed

C020

- - - -

Standby to execute external current adjustment

C021

- - - -

Output button illuminates and CC is displayed

C030

- - - -

Exit external current adjustment

C110

- - - -

Enter voltage adjustment mode

C111

- - - -

Standby adjustment offset voltage value

C112

X

Adjustment offset voltage value

C113

- - - -

Standby adjustment half-scale voltage value

C114

X

Adjustment full-scale voltage value

C115

- - - -

Standby adjustment full-scale voltage value

C116

X

Adjustment full-scale voltage value

C117

- - - -

Standby OVP adjustment

C118

ok

OVP adjustment

C120

- - - -

Enter current adjustment mode

C121

- - - -

Standby adjustment half-scale current value

C122

X

Adjustment offset current value

C123

- - - -

Standby adjustment half-scale current value

C124

X

Adjustment half-scale current value

C125

- - - -

Adjustment full-scale current value

C126

X

Set the full-scale value

C127

- - - -

Standby OCP adjustment

C128

ok

OCP adjustment

C130

0

Save mode

C130

1

Save adjustment results

C130

ok

Indicates adjustment results saved

X X Exit adjustment mode

Adjustment codes

Voltage display Current display Description

Section 10

Adjustment code glossary

The "x" in the previous table indicates that the value is not fixed.

All Keithley trademarks and trade names are the property of Keithley Instruments.

All other trademarks and trade names are the property of their respective companies.

Specifications are subject to change without notice.

Keithley Instruments

Corporate Headquarters • 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • 1-800-833-9200 • tek.com/keithley

07/2020

Tektronix Series 2260B Multi-Range Programmable DC Power Supplies Verification,Adjustment Manual User manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety precautions

Table of contents

Welcome

Introduction

Extended warranty

Contact information

Series 2260B available models

Verification information

Verification preparation

Verification equipment

Constant voltage verification

Constant voltage (CV) verification tests

Voltage programming and measurement accuracy verification

Constant voltage load regulation verification

Constant voltage line regulation verification

Constant voltage ripple and noise verification

Constant current verification

Constant current (CC) verification tests

Current programming and measurement accuracy verification

Constant current load regulation verification

Constant current line regulation verification

Constant current noise verification

Verification test record forms

30 Volt verification test record

80 Volt verification test record

250 Volt verification record

800 Volt verification record

Adjustment equipment

2260B Adjustment equipment

Remove top cover

Analog interface adjustment

Confirm location of adjustment points

Analog interface adjustment procedure

Connect device equipment

Constant voltage adjustment

Constant voltage (CV) adjustment procedure

Connect device equipment

Constant current adjustment

Constant current (CC) adjustment procedure

Adjustment codes

Adjustment code glossary