Keithley 2430 Service Manual
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Keithley 2430 Service Manual

Keithley 2430 Service Manual

1kw pulse sourcemeter
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Model 2430
1kW Pulse SourceMeter
®
Service Manual
Contains Calibrating and Servicing Information

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Summary of Contents for Keithley 2430

  • Page 1 Model 2430 1kW Pulse SourceMeter ® Service Manual Contains Calibrating and Servicing Information...
  • Page 2 WARRANTY Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 1 year from date of shipment. Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batteries, diskettes, and documentation.
  • Page 3 TAIWAN: 1FL., 85 Po Ai Street • Hsinchu, Taiwan, R.O.C. • 886-3-572-9077• Fax: 886-3-572-9031...
  • Page 4 Model 2430 1kW Pulse SourceMeter ® Service Manual ©1998, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Third Printing, October 2004 Document Number: 2430-902-01 Rev. C...
  • Page 5 Revision A (Document Number 2430-902-01)............December 1998 Revision B (Document Number 2430-902-01) ..............June 2000 Revision C (Document Number 2430-902-01) ............October 2004 All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc.
  • Page 6 Other brand names are trademarks or registered trademarks of their respective holders.
  • Page 7 Keithley products are designed for use with electrical signals that are rated Measurement Category I and Measurement Category II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most measurement, control, and data I/O signals are Measurement Category I and must not be directly connected to mains voltage or to voltage sources with high transient over-voltages.
  • Page 8 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 Instruments. Standard fuses, with applicable national safety ap- provals, may be used if the rating and type are the same. Other components that are not safety related may be purchased from other suppliers as long as they are equivalent to the original component.

  • Page 9: Table Of Contents

    Table of Contents Performance Verification Introduction ................1-2 Verification test requirements ............ 1-2 Environmental conditions ........... 1-2 Warm-up period ..............1-2 Line power ................1-3 Recommended test equipment ........... 1-3 1Ω resistor characterization ..........1-4 Verification limits ..............1-4 Example limits calculation ..........1-4 Resistance limits calculation ..........
  • Page 10 Changing the password ............... 2-5 Changing the password from the front panel ...... 2-6 Changing the password by remote ........2-6 Resetting the calibration password ..........2-6 Viewing calibration dates and calibration count ......2-7 Calibration errors ................ 2-7 Front panel error reporting ..........2-7 Remote error reporting ............
  • Page 11 Battery replacement ..............4-13 Battery replacement precautions ........4-13 Battery replacement procedure ......... 4-14 No comm link error ..............4-14 Disassembly Introduction ................5-2 Handling and cleaning ............... 5-2 Handling PC boards ............5-2 Solder repairs ..............5-2 Static sensitive devices ............... 5-3 Assembly drawings ..............
  • Page 12 Introduction ................C-2 Computer hardware requirements ..........C-2 Software requirements ............... C-2 Calibration equipment ............... C-2 General program instructions ............ C-2 Program C-1 Model 2430 calibration program ....C-4 Requesting calibration constants ..........C-7 Program C-2 Requesting calibration constants ....C-7...
  • Page 13 List of Illustrations Performance Verification Figure 1-1 Connections for voltage verification tests ........1-9 Figure 1-2 Connections for 10µA to 1A range current verification tests .. 1-11 Figure 1-3 Connections for 3A range current verification tests ....1-12 Figure 1-4 Connections for resistance accuracy verification .....
  • Page 14 List of Tables Performance Verification Table 1-1 Recommended verification equipment ........1-3 Table 1-2 Maximum compliance values ............. 1-7 Table 1-3 Output voltage accuracy limits ........... 1-9 Table 1-4 Voltage measurement accuracy limits ........1-10 Table 1-5 Output current accuracy limits ..........1-12 Table 1-6 Current measurement accuracy limits ........
  • Page 15 Command Reference Table B-1 Remote calibration command summary ........B-2 Table B-2 Recommended :CALibration:PROTected:SENSe parameter ranges ............B-6 Table B-3 Recommended:CALibration:PROTected:SOURce parameter ranges ............B-7 Table B-4 Calibration errors ..............B-9...

  • Page 17: Performance Verification

    Performance Verification...

  • Page 18: Introduction

    Performance Verification Introduction Use the procedures in this section to verify that Model 2430 accuracy is within the limits stated in the instrument’s one-year accuracy specifications. You can perform these verification proce- dures: • When you first receive the instrument to make sure that it was not damaged during shipment.

  • Page 19: Line Power

    Also, allow the test equipment to warm up for the minimum time specified by the manufactur- Line power The Model 2430 requires a line voltage of 100 to 240V and a line frequency of 50 or 60Hz. Verification tests must be performed within this range.

  • Page 20: 1Ω Resistor Characterization

    3A current measurement range test procedure. Verification limits The verification limits stated in this section have been calculated using only the Model 2430 one-year accuracy specifications, and they do not include test equipment uncertainty. If a par- ticular measurement falls outside the allowable range, recalculate new limits based on Model 2430 specifications and corresponding test equipment specifications.

  • Page 21: Restoring Factory Defaults

    DC current measurement accuracy • Resistance measurement accuracy If the Model 2430 is not within specifications and not under warranty, see the calibration pro- cedures in Section 2 for information on calibrating the unit. Test considerations When performing the verification procedures: •...

  • Page 22: Setting The Source Range And Output Value

    Performance Verification • Make sure the Model 2430 is set to the correct source range (see below). • Ensure that the Model 2430 output is turned on before making measurements. • Ensure the test equipment is set up for the proper function and range.

  • Page 23: Compliance Considerations

    Performance Verification Compliance considerations Compliance limits When sourcing voltage, you can set the SourceMeter to limit current from 10nA to 3.15A. Conversely, when sourcing current, you can set the SourceMeter to limit voltage from 0.2mV to 105V. The SourceMeter output will not exceed the programmed compliance limit. Types of compliance There are two types of compliance that can occur: “real”...

  • Page 24: Determining Compliance Limit

    With the power off, connect the digital multimeter to the Model 2430 INPUT/OUTPUT jacks, as shown in Figure 1-1. Select the multimeter DC volts measuring function. Press the Model 2430 SOURCE V key to source voltage, and make sure the source out- put is turned on.

  • Page 25: Voltage Measurement Accuracy

    Follow the steps below to verify that Model 2430 voltage measurement accuracy is within specified limits. The test involves setting the source voltage to full-range values, as measured by a precision digital multimeter, and then verifying that the Model 2430 voltage readings are within required limits.

  • Page 26: Output Current Accuracy

    Performance Verification Select the multimeter DC volts function. Set the Model 2430 to both source and measure voltage by pressing the SOURCE V and MEAS V keys, and make sure the source output is turned on. Verify output voltage accuracy for each of the voltages listed in Table 1-4. For each test point: •...

  • Page 27: Figure 1-2 Connections For 10Μa To 1A Range Current Verification Tests

    Digital Multimeter Select the multimeter DC current measuring function. Press the Model 2430 SOURCE I key to source current, and make sure the source output is turned on. Verify output current accuracy for the 10μA-1A range currents listed in Table 1-5. For each test point: •...

  • Page 28: Figure 1-3 Connections For 3A Range Current Verification Tests

    • Select the 3A source range. • Set the Model 2430 output current to the correct 3A output value. • Verify that the multimeter reading is within the 3A range limits given in Table 1-5. (Since the value of the 1Ω resistor value is assumed to be the same as its nominal value, the DMM voltage reading is the same as the sourced current.)

  • Page 29: Current Measurement Accuracy

    Figure 1-2. Select the multimeter DC current function. Set the Model 2430 to both source and measure current by pressing the SOURCE I and MEAS I keys, and make sure the source output is turned on.

  • Page 30: Resistance Measurement Accuracy

    1-14 Performance Verification • Set the Model 2430 source output to the correct 3A value as measured by the digital multimeter. • Note the DMM voltage reading, and then calculate the current from the voltage read- ing and characterized 1Ω resistance value as I = V/R, where V is the DMM voltage reading and R is the characterized resistance value.

  • Page 31: Figure 1-4 Connections For Resistance Accuracy Verification

    If using the Fluke 5450A resistance calibrator, you cannot use the Auto Ohms mode of the Model 2430 to verify the 2¾ range. The 1A test current for the 2¾ range of the Model 2430 will damage the calibrator. On the Model 2430, use the CONFIG OHMS menu to select the MANUAL source mode, and then set the source (test) current to 100mA.

  • Page 32: Table 1-7 Ohms Measurement Accuracy Limits

    18.9781 to 19.0219MΩ 1. Nominal resistance values. 2. Reading limits based on Model 2430 normal accuracy specifications and nominal resistance values. If actual resistance values differ from nominal values shown, recalculate reading limits using actual calibrator resistance values and Model 2430 normal accuracy specifications. See Verification limits earlier in this section for details.

  • Page 33: Calibration

    Calibration...

  • Page 34: Introduction

    Also, allow the test equipment to warm up for the minimum time specified by the manufacturer. Line power Model 2430 requires a line voltage of 100 to 240V at line frequency of 50 or 60Hz. The in- strument must be calibrated while operating from a line voltage within this range.

  • Page 35: Calibration Cycle

    Calibration • If an error occurs during calibration, the Model 2430 will generate an appropriate error message. See Appendix B for more information. WARNING The maximum common-mode voltage (voltage between LO and chassis ground) is 250V peak. Exceeding this value may cause a breakdown in in- sulation, creating a shock hazard.

  • Page 36: 1Ω Resistor Characterization

    Calibration 1Ω resistor characterization The 1Ω resistor must be characterized to ±300ppm or better before calibrating the 3A current range. Use the 4-wire ohms function of the DMM recommended in Table 1-1 to measure the resistance value, and then use that measured value to calculate the current during the 3A current range calibration procedure.

  • Page 37: Unlocking Calibration By Remote

    Calibration NOTE With calibration unlocked, the sense function and range track the source function and range. That is, when :SOUR:FUNC is set to VOLT, the :SENS:FUNC setting will be 'VOLT:DC'. When :SOUR:FUNC is set to CURR, the :SENS:FUNC setting will be 'CURR:DC'.

  • Page 38: Changing The Password From The Front Panel

    Calibration Changing the password from the front panel Follow the steps below to change the password from the front panel: Press the MENU key, then choose CAL and press ENTER. The instrument will display the following: CALIBRATION UNLOCK EXECUTE VIEW-DATES ©...

  • Page 39: Viewing Calibration Dates And Calibration Count

    Note that each range is separately calibrated by repeating the entire procedure for each range. Step 1: Prepare the Model 2430 for calibration Turn on the Model 2430 and the digital multimeter, and allow them to warm up for at least one hour before performing calibration.

  • Page 40: Figure 2-1 Voltage Calibration Test Connections

    Step 2: Voltage calibration Perform the steps below for each voltage range, using Table 2-3 as a guide. Connect the Model 2430 to the digital multimeter, as shown in Figure 2-1. Select the multimeter DC volts measurement function. Figure 2-1...
  • Page 41 After adjusting the display to agree with the DMM reading, press ENTER. The instru- ment will then display the following: V-CAL Press ENTER to Output +000.00mV Press ENTER. The Model 2430 will source 0mV and at the same time display the fol- lowing: DMM RDG: +000.0000mV , ENTER or EXIT.

  • Page 42: Table 2-3 Front Panel Voltage Calibration

    2. Multimeter reading used in corresponding calibration step. See procedure. Step 3: Current calibration Perform the following steps for each current range, using Table 2-4 as a guide. Connect the Model 2430 to the digital multimeter, as shown in Figure 2-2. Select the multimeter DC current measurement function.

  • Page 43: Figure 2-2 10Μa To 1A Range Current Calibration Test Connections

    ¹ ƒ Note and record the DMM reading, and then adjust the Model 2430 display to agree exactly with the actual DMM reading. Use the up and down arrow keys to select the digit value, and use the left and right arrow keys to choose the digit position (or use the num- ber keys, 0-9, +/-).
  • Page 44 2-12 Calibration Press ENTER. The Model 2430 will source 0mA and at the same time display the fol- lowing: DMM RDG: +00.00000μA , ENTER or EXIT. ß © ¹ ƒ Note and record the DMM reading, and then adjust the Model 2430 display to agree with the actual DMM reading.

  • Page 45: Figure 2-3 3A Range Current Calibration Test Connections

    Calibration 2-13 Figure 2-3 4- WIRE INPUT/ SENSE OUTPUT 3A range current 125V 125V PEAK PEAK PEAK calibration test ® 2430 1KW PULSE SourceMeter connections 250V MEAS SOURCE PEAK Ω EDIT FCTN RANGE DISPLAY EDIT TOGGLE AUTO TERMINALS LOCAL FILTER...

  • Page 46: Table 2-4 Front Panel Current Calibration

    NOTE For temporary calibration without saving new calibration constants, proceed to Step 5: Lock out calibration. From normal display, press MENU. Select CAL, and then press ENTER. The Model 2430 will display the following: CALIBRATION UNLOCK EXECUTE VIEW-DATES © SAVE LOCK CHANGE-PASSWORD...

  • Page 47: Remote Calibration

    Press ENTER or EXIT to continue. Press ENTER or EXIT to complete process. Step 5: Lock out calibration From normal display, press MENU. Select CAL, then press ENTER. The Model 2430 will display the following: CALIBRATION UNLOCK EXECUTE VIEW-DATES ©...

  • Page 48: Recommended Calibration Parameters

    Cal commands protected by password. :CODE '<password>' Unlock cal; changes password if cal is already unlocked. (Default password: KI002430.) :COUNT? Query number of times 2430 has been calibrated. :SAVE Save calibration data to EEPROM.* :LOCK Lock calibration, inhibit SAVE command operation.

  • Page 49: Table 2-6 Recommended :Calibration:protected:sense Parameter Ranges

    Calibration 2-17 Table 2-6 Recommended :CALibration:PROTected:SENse parameter ranges Sense First parameter Second parameter Third parameter range (zero) (negative full scale) (positive full scale) 0.2V -0.002 to +0.002 -0.18 to -0.22 +0.18 to +0.22 -0.02 to +0.02 -1.8 to -2.2 +1.8 to +2.2 -0.2 to +0.2 -18 to -22 +18 to +22...

  • Page 50: Remote Calibration Procedure

    Connect the Model 2430 to the controller IEEE-488 interface or RS-232 port using a shielded interface cable. Turn on the Model 2430 and the test equipment, and allow them to warm up for at least one hour before performing calibration.

  • Page 51: Table 2-8 Voltage Calibration Initialization Commands

    :OUTP:STAT ON Turn source on. Step 3: Current calibration Connect the Model 2430 to the digital multimeter (Figure 2-2), and select the multimeter DC current function. Send the commands summarized in Table 2-10 in the order listed to initialize current...

  • Page 52: Table 2-9 Voltage Range Calibration Commands

    Establish negative full-range polarity. Take DMM reading. Read actual output value. :CAL:PROT:SOUR <DMM_Reading> Calibrate sense function negative full scale. Check 2430 for errors. :CAL:PROT:SENS <DMM_Reading> Calibrate source function negative full scale. Check 2430 for errors. :SOUR:VOLT 0.0 Set output to 0V.
  • Page 53 For example: :CAL:PROT:SOUR 1E-6 Connect the 1Ω resistor and DMM to the Model 2430 INPUT/OUPUT jacks, as shown in Figure 2-3. Select the DMM DC volts function. Repeat step 3 for the 3A range using the calculated current as follows: I = V/R, where V is the DMM voltage reading, and R is the characterized value of the 1Ω...
  • Page 54 Establish negative full-range polarity. Take DMM reading. Read actual output value. :CAL:PROT:SOUR <DMM_Reading> Calibrate sense function negative full scale. Check 2430 for errors. :CAL:PROT:SENS <DMM_Reading> Calibrate source function negative full scale. Check 2430 for errors. :SOUR:CURR 0.0 Set output to 0A.

  • Page 55: Single-Range Calibration

    Calibration 2-23 NOTE Calibration will be temporary unless you send the SAVE command. Also, cali- bration data will not be saved if (1) calibration is locked, (2) invalid data exists, or (3) all steps were not completed. Step 6: Lock out calibration To lock out further calibration, send the following command after completing the calibration procedure: :CAL:PROT:LOCK...
  • Page 56 2-24 Calibration...

  • Page 57: Routine Maintenance

    Routine Maintenance...

  • Page 58: Introduction

    Routine Maintenance Introduction The information in this section deals with routine type maintenance that can be performed by the operator. Line fuse replacement WARNING Disconnect the line cord at the rear panel, and remove all test leads con- nected to the instrument (front and rear) before replacing the line fuse. The power line fuse is accessible from the rear panel, just above the AC power receptacle (Figure 3-1).

  • Page 59: Table 3-1 Power Line Fuse

    If the power line fuse continues to blow, a circuit malfunction exists and must be corrected. Refer to the troubleshooting section of this manual for additional information. Table 3-1 Power line fuse Line voltage Rating Keithley part no. 100-240V 250V, 3.15A, Slow FU-106-3.15 Blow 5 × 20mm...
  • Page 60 Routine Maintenance...

  • Page 61: Troubleshooting

    Troubleshooting...

  • Page 62: Introduction

    Troubleshooting Introduction This section of the manual will assist you in troubleshooting and repairing the Model 2430. Included are self-tests, test procedures, troubleshooting tables, and circuit descriptions. Note that disassembly instructions are located in Section 5, and component layout drawings are at the end of Section 6.

  • Page 63: Power-On Self-Test

    Troubleshooting Power-on self-test During the power-on sequence, the Model 2430 will perform a checksum test on its EPROM and test its RAM. If one of these tests fails, the instrument will lock up. Front panel tests There are three front panel tests: one to test the functionality of the front panel keys and two to test the display.

  • Page 64: Char Set Test

    Troubleshooting • Each digit (and adjacent annunciator) is sequenced. All the pixels of the selected digit are on. When finished, abort the display test by pressing EXIT. The instrument returns to the FRONT PANEL TESTS MENU. Continue pressing EXIT to back out of the menu structure.

  • Page 65: Overall Block Diagram

    Troubleshooting Overall block diagram Figure 4-1 shows an overall block diagram of the Model 2430. Circuitry may be divided into three general areas: • Analog circuits — includes sourcing circuits such as the DACs, clamps, output stage, and feedback circuits, as well as measurement circuits such as the A/D converter.

  • Page 66: Analog Circuits

    Troubleshooting Analog circuits Figure 4-2 shows a block diagram of the analog circuits. D/A converters control the programmed voltage and current, or voltage compliance and current compliance. Each DAC has two ranges, a 10V full-scale output or a 1V full-scale output. The DAC outputs are fed to the summing node, FB.

  • Page 67: Power Supply

    Figure 4-4 shows a simplified schematic of the output stage. The Model 2430 output stage serves two purposes: (1) it converts signals from floating com- mon to output common, and (2) it provides both voltage and current amplification. The output stage drive transistors are biased in class B configuration to prevent the possibility of thermal runaway with high-current output values.
  • Page 68 Troubleshooting by the resistor-capacitor ladder circuits shown. High-current drive capability is provided by Q500-Q511. Coarse current limits are built into the output stage. Figure 4-4 +85V Output stage simplified Q500 schematic HI Drive +42V Q504 Q514 +15Vf Q516 Q518 Maindrive 300K Q521 -15Vf...

  • Page 69: A/D Converter

    Active guard The Model 2430 has an active guard or “six-wire ohms” circuit used to measure complex de- vices. This circuitry provides a low-current (50mA) equivalent of the voltage on output HI. If the unit is in the SV mode, the low-current equivalent of the source voltage will appear on the guard terminal.

  • Page 70: Display Board Circuit Theory

    4-10 Troubleshooting Figure 4-5 Digital circuitry block diagram U15, U16 U12, U14 Serial RS-232 Interface Interface Reset E PROM Microprocessor GPIB U6, U13 IEEE-488 Interface Control/Data A/D Interface U9, U25 To Display Board Controller 16.78MHz Voltage Source Trigger Control Trigger Digital I/O Digital Display board circuit theory...

  • Page 71: Troubleshooting

    Troubleshooting 4-11 The display uses a common multiplexing scheme with each character refreshed in sequence. U903 and U904 are the grid drivers, and U901 and U905 are the dot drivers. Note that dot driver and grid driver data is serially transmitted from the microcontroller (PD3 and PC1). The front panel keys (S901-S931) are organized into a row-column matrix to minimize the number of microcontroller peripheral lines required to read the keyboard.

  • Page 72: Power Supply Checks

    4-12 Troubleshooting Power supply checks Power supply problems can be checked using Table 4-2. See “Principles of operation” for circuit theory on the power supply. Table 4-2 Power supply checks Step Item/component Required condition Remarks Line fuse Check continuity. Remove to check. Line power Plugged into live receptacle, Check for correct power-up...

  • Page 73: Analog Circuitry Checks

    Disconnect the instrument from the power line and all other equipment be- fore changing the battery. The volatile memories of the Model 2430 are protected by a replaceable battery when power is off. Typical battery life is approximately 10 years, but the battery should be replaced if the voltage drops below 2.5V regardless of age.

  • Page 74: Battery Replacement Precautions

    4-14 Troubleshooting Battery replacement precautions WARNING The following precautions must be followed to avoid personal injury. Wear safety glasses or goggles when working with lithium batteries. Do not short the battery terminals together. Keep lithium batteries away from all liquids. Do not attempt to recharge lithium batteries.

  • Page 75: Disassembly

    Disassembly...

  • Page 76: Introduction

    Disassembly Introduction This section explains how to handle, clean, and disassemble the Model 2430. Disassembly drawings are located at the end of this section. Handling and cleaning To avoid contaminating PC board traces with body oil or other foreign matter, avoid touching the PC board traces while you are repairing the instrument.

  • Page 77: Static Sensitive Devices

    Use the assembly drawings located at the end of this section to assist you as you disassemble and re-assemble the Model 2430. Also, refer to these drawings for information about the Kei- thley part numbers of most mechanical parts in the unit. Assembly drawings include: •...

  • Page 78: Analog Board Removal

    Disassembly Remove mounting ears — Remove the screw that secures each mounting ear. Pull down and out on each mounting ear. NOTE When re-installing the mounting ears, make sure to mount the right ear to the right side of the chassis, and the left ear to the left side of the chassis. Each ear is marked “RIGHT”...

  • Page 79: Digital Board Removal

    Disassembly Remove screws. • Remove two fastening screws that secure the analog board assembly to the chassis. These screws are located on the side of the board opposite from the heat sink. • Remove two screws that secure the heat sink to the chassis. Remove analog board assembly.

  • Page 80: Front Panel Disassembly

    Disassembly During re-assembly, replace the board, and start the IEEE-488, Digital I/O, and RS-232 connector nuts and the mounting screw. Tighten all the fasteners once they are all in place and the board is correctly aligned. Front panel disassembly Use the following procedures to remove the display board and/or the pushbutton switch pad. Unplug the display board ribbon cables.

  • Page 81: Instrument Re-Assembly

    Disassembly Instrument re-assembly Re-assemble the instrument by reversing the previous disassembly procedures. Make sure that all parts are properly seated and secured, and that all connections are properly made. To en- sure proper operation, replace the analog signal wire ferrite noise filters, and securely fasten the shield.
  • Page 82 Disassembly...
  • Page 83 Replaceable Parts...

  • Page 84: Introduction

    Model 2430. Parts lists The electrical parts lists for the Model 2430 are shown in tables at the end of this section. For part numbers to the various mechanical parts and assemblies, use the Miscellaneous parts list and the assembly drawings provided at the end of Section 5.

  • Page 85: Table 6-1 Analog Board Parts List

    Replaceable Parts Table 6-1 Analog board parts list Keithley Circuit designation Description Part No. C200-203, 205-210, 225, 226, 231, CAP, 0.1UF, 10%, 25V, CERAMIC C-495-.1 232, 237, 238 C204, C411, C608, C609 CAP, 0.01UF, 10%, 50V, CERAMIC C-491-.01 C211, 212, 213, 214...
  • Page 86 Replaceable Parts Table 6-1 (cont.) Analog board parts list Keithley Circuit designation Description Part No. C501, C503 CAP, 3.3, 20%, 250V, ALUM C-400-3.3 ELECTROLYTIC C502, 504, 505, 506, 550, 551, 552, CAP, 0.01U, 10%, 500V, CERAMIC C-497-.01 553, 577, 580...
  • Page 87 Replaceable Parts Table 6-1 (cont.) Analog board parts list Keithley Circuit designation Description Part No. CR517, CR519 RECTIFIER RF-132 CR600 DIODE, DUAL HSM-2822T31 RF-95 CR601 DIODE, SCHOTTKY, SD103C RF-113 HS1, HS2, HS3, HS4, HS5, HS6, HEAT SINK HS-55 J1027, J1036...
  • Page 88 Replaceable Parts Table 6-1 (cont.) Analog board parts list Keithley Circuit designation Description Part No. Q228, 247, 248, 520, 601 TRANS, PNP, MMBT3906L TG-244 Q242, Q243 TRANS, N-CHAN MOSFET, TN254ON8 TG-274 Q249, Q528 TRANS, NPN SILICON, BC846BL TG-278 Q250, Q529...
  • Page 89 Replaceable Parts Table 6-1 (cont.) Analog board parts list Keithley Circuit designation Description Part No. R202, 204, 252, 255, 256, 259, 260, RES, 100K, 1%, 100MW, THICK FILM R-418-100K 263, 264, 267 R205, 310, 485, 552, 595, 598 RES, 0.0499, 1%, 100MW, THICK FILM R-418-.0499...
  • Page 90 Replaceable Parts Table 6-1 (cont.) Analog board parts list Keithley Circuit designation Description Part No. R304, R305, R306, R548 RES, 33, 5%, 250MW, METAL FILM R-376-33 R307, R413, R652, R665 RES, 357, 1%, 100MW, THICK FILM R-418-357 R308, 379-387, 391, 392...
  • Page 91 Replaceable Parts Table 6-1 (cont.) Analog board parts list Keithley Circuit designation Description Part No. R460, 462, 466, 472, 478, 481, 489, RES, 1K, 1%, 100MW, THICK FILM R-418-1K 502, 510, 558 R463, 473, 479 RES, 30.1K, 1%, 100MW, THICK FILM R-418-30.1K...
  • Page 92 6-10 Replaceable Parts Table 6-1 (cont.) Analog board parts list Keithley Circuit designation Description Part No. R618 RES, 34K, 1%, 100MW, THICK FILM R-418-34K R619 RES, 4.75K, 1%, 100MW, THICK FILM R-418-4.75K R620 RES, 82.5, 1%, 100MW, THICK FILM R-418-82.5...
  • Page 93 Replaceable Parts 6-11 Table 6-1 (cont.) Analog board parts list Keithley Circuit designation Description Part No. U206, U207, U208, U233, U264, IC, DUAL PICOAMP OP-AMP AD706JR IC-910 U600 U209, U215 IC, QUAD COMPARATOR, LM339D IC-774 U210, U220 IC, DUAL BIPOLAR OP-AMP, LT1124CS8 IC-955...
  • Page 94 6-12 Replaceable Parts Table 6-1 (cont.) Analog board parts list Keithley Circuit designation Description Part No. U515 OPTOCOUPLER, HIGH SPEED IC-1173 U601 IC, QUAD D FLIP FLOP W/CLK, RESET IC-923 74HC175 U604 IC, NCHAN LAT DMOS QUADFET, IC-893 SD5400CY U605...

  • Page 95: Table 6-2 Digital Board Parts List

    Replaceable Parts 6-13 Table 6-2 Digital board parts list Keithley Circuit designation Description Part No. BATTERY, 3V BA-46 C1, 3, 11-14, 16, 17, 20, 22, 23, 25, CAP, 0.1UF, 10%, 25V, CERAMIC C-495-.1 26, 30, 77 C103 CAP, 100UF, 20%, 10V, ALUM ELEC...
  • Page 96 6-14 Replaceable Parts Table 6-2 (cont.) Digital board parts list Keithley Circuit designation Description Part No. C4, C10 CAP, 15P, 1%, 100V, CERAMIC C-512-15P CAP, 0.33UF, 10%, 50V, CERAMIC C-464-.33 CAP, 0.1UF, 20%, 100V, CERAMIC C-436-.1 CAP, 33PF, 10%, 1000V, CERAMIC...
  • Page 97 Replaceable Parts 6-15 Table 6-2 (cont.) Digital board parts list Keithley Circuit designation Description Part No. J1002 CONN, MOLEX, 3-PIN CS-772-3 J1023 CONN, RIGHT ANGLE, 24 PIN CS-507 J1024 CONN, RT ANGLE, MALE, 9 PIN CS-761-9 J1025 CONN, MICRODIN W/GND FINGERS...
  • Page 98 6-16 Replaceable Parts Table 6-2 (cont.) Digital board parts list Keithley Circuit designation Description Part No. R51, R108 RES, 249K, 1%, 100MW, THICK FILM R-418-249K R111 RES, 357, 1%, 100MW, THICK FILM R-418-357 R112 RESISTOR, FLAME-PROOF R-439-470K R113 RES, 49.9K, 1%, 100MW, THICK FILM R-418-49.9K...
  • Page 99 Replaceable Parts 6-17 Table 6-2 (cont.) Digital board parts list Keithley Circuit designation Description Part No. RES, 100K, 10%, 1W, METAL FILM R-464-100K R7, 26, 69, 71, 73, 74, 76, 78-81, 83, RES, 10K, 1%, 100MW, THICK FILM R-418-10K 85-89...
  • Page 100 6-18 Replaceable Parts Table 6-2 (cont.) Digital board parts list Keithley Circuit designation Description Part No. IC, REGULATOR SWITCHING, IC-1080 78ST105SC IC, MICROMANAGER, DS12365-10 IC-884 IC, OCTAL INTERFACE BUS, 75160 IC-646 IC, DUAL POWER MOSFET DRIVER, IC-437 TSC426 U1, U22...

  • Page 101: Table 6-3 Display Board Parts List

    Replaceable Parts 6-19 Table 6-3 Display board parts list Keithley Circuit designation Description Part No. C901 CAP, 22UF, 20%, 6.3, TANTALUM C-417-22 C902, C904, C907, C908, C910 CAP, 0.1UF, 20%, 100V, CERAMIC C-436-.1 C903, C905, C906, C909, C911 CAP, 0.1UF, 20%, 50V, CERAMIC C-418-.1...

  • Page 102: Table 6-4 Pulse Board Parts List

    6-20 Replaceable Parts Table 6-4 Pulse board parts list Keithley Circuit designation Description Part No. C801, 803, 805, 807, 809, 810- CAP, 220U, 20%, 160V, ALUM C-584-220 C802, C804 CAP, 2200U, 20%, 50V, ALUM C-586-2200 CONN, MALE 3 PIN CS-612-1...

  • Page 103: Table 6-5 Mechanical Parts List

    Replaceable Parts 6-21 Table 6-5 Mechanical parts list Description Keithley Part No. FUSE, SLO-BLO, 5×20MM FU-106-3.15 BANANA JACK, PUSH-IN, BLACK BJ-14-0 BANANA JACK, PUSH-IN, BLUE BJ-14-6 BANANA JACK, PUSH-IN, RED BJ-14-2 BANANA JACK, PUSH-IN, WHITE BJ-14-9 BEZEL, REAR 428-303D SHIELD, BOTTOM...
  • Page 104 6-22 Replaceable Parts...

  • Page 105: Specifications

    Specifications...
  • Page 106 A -2 Specifications 2430 Specifications Source Specifications Vo l tage Programming Accuracy (remote sense) Accuracy (1 Year) Noise Programming 23°C ±5°C (peak-peak) Range Resolution ±% rdg. + volts 0.1Hz – 10Hz 200.000 m V 0.02% + 600 10 V 2.00000 50 V 0.02% + 600...
  • Page 107 Specifications A -3 Additional Pulse Mode Source Specifications MAXIMUM DUTY CYCLE: 8%, hardware limited, 10A range only. All other ranges 100%. MAXIMUM PULSE WIDTH: 5ms from 90% rising to 90% falling edge, 2.5ms 10A range. MINIMUM PULSE WIDTH: 150 s. MINIMUM PULSE RESOLUTION: 50 s typical, 70 s max., limited by system jitter.
  • Page 108 A -4 Specifications Resistance Measurement Accuracy (4 wire remote sense) Source I Mode, Auto Ohms Max. Default Normal Accuracy (23°C ± 5°C) Enhanced Accuracy (23°C ± 5°C) Range Resolution Test Current 1 Year, ±(%rdg + ohms) 1 Year, ±(%rdg + ohms) <0.20000 ž...
  • Page 109 Specifications A -5 C O M P O N E N T HANDLER INTERFACE TIME: 4 , 6 Speed NPLC/Trigger Origin Measure Pass/Fail Te s t Source Pass/Fail Te s t Source-Measure Pass/Fail Te s t Fast 0.01 / external 1.01 ms (1.08 ms) 0.5 ms (0.5 ms) 5.3 ms (5.3 ms)
  • Page 110 Specifications 2430-C Specifications Source Specifications Vo l tage Programming Accuracy (remote sense) Accuracy (1 Year) Noise Programming 23 C –5 C (peak-peak) Range Resolution –% rdg. + volts 0.1Hz 10Hz 200.000 m V 0.02% + 600 10 V 2.00000 50 V 0.02% + 600...
  • Page 111 Specifications Additional Source Specifications TRANSIENT RESPONSE TIME: 30 s typical for the output to recover to its spec. following a step change in load. Resistive load. COMMAND PROCESSING TIME: Maximum time required for the output to begin to change following the receipt of :SOURce:VOLTage|CURRent <nrf>...
  • Page 112 Specifications 1 , 2 , 7 Measure Specifications Vo l tage Measurement Accuracy (remote sense) Max. Input Accuracy (23 C – 5 C) Range Resolution Resistance 1 Year, –(%rdg + v o l ts ) 200.000 m V >10 G 0.012% + 300 V 2.00000 V 10 V...
  • Page 113 Specifications System Speeds Measurement MAXIMUM RANGE CHANGE RATE: 65/second. MAXIMUM MEASURE A U TORANGE TIME: 40ms (fixed source) S W E E P O P E R ATION READING RATES (rdg/second) FOR 60Hz (50Hz): Source-Measure NPLC/Tr i g g e r Measure Source-Measure Pass/Fail Test...
  • Page 114 A-10 Specifications General NOISE REJECTION: NPLC N M R R C M R R Fast 0.01 80 dB Medium 80 dB Normal 60 dB 120 dB Except lowest current range = 90dB. LOAD IMPEDANCE: St able into 20,000pF typical. COMMON MODE VOLTAGE: 250VDC, externally limited to 3.15A max. COMMON MODE ISOLATION: >10 , <1000pF.

  • Page 115: Accuracy Calculations

    Specifications A-11 Accuracy calculations The information below discusses how to calculate accuracy for both measurement and source functions. Measurement accuracy Measurement accuracy is calculated as follows: Accuracy = ±(% of reading + offset) As an example of how to calculate the actual reading limits, assume that you are measuring 10V on the 20V range.
  • Page 116 A-12 Specifications...

  • Page 117: Command Reference

    Command Reference...

  • Page 118: Introduction

    Command Reference Introduction This appendix contains detailed information on the various Model 2430 remote calibration commands, calibration error messages, and methods to detect the end of each calibration step. Section 2 of this manual covers detailed calibration procedures. Command summary Table B-1 summarizes Model 2430 calibration commands.

  • Page 119: Miscellaneous Commands

    Example Send default code of KI002430. :CAL:PROT:CODE 'KI002430' :COUNT? (:CALibration:PROTected:COUNT?) Purpose To request the number of times the Model 2430 has been calibrated. Format :cal:prot:count? Response Number of times calibrated. Description The :COUNT? query may be used to determine the total number of times the Model 2430 has been calibrated.

  • Page 120: Save

    Command Reference Description The :LOCK command allows you to lock out comprehensive calibration af- ter completing those procedures. Thus, :LOCK performs the opposite of sending the password with the :CODE command. The :LOCK? query returns calibration lock status. Note To unlock calibration, send the :CODE command with the appropriate pass- word.

  • Page 121: Ndue

    Table B-2. Note When the Model 2430 receives this command, it will attempt to place the pa- rameter into one of three parameter ranges summarized in Table B-2, de- pending on the active :SENS:FUNC and range. If the parameter does not fit into any of the three allowed ranges, an error number -222, “Parameter data...

  • Page 122: Source

    :CAL:PROT:SOUR command for each parameter listed in Table B-3. Note When the Model 2430 receives this command, it will attempt to place the pa- rameter into one of the four parameter ranges summarized in Table B-3, de- pending on the active :SOUR:FUNC and range. If the parameter does not fit into any of the four allowed ranges, an error number -222, “Parameter data...

  • Page 123: Table B-3 Recommended:calibration:protected:source Parameter Ranges

    Because the source is calibrated for both positive and negative values, two zero calibration points are required. The Model 2430 automatically uses the appropriate zero parameter based on whether the source polarity is positive or negative.

  • Page 124: Data

    Several methods to detect calibration errors are discussed below. Reading the error queue As with other Model 2430 errors, any calibration errors will be reported in the error queue. (You can read the error queue by using the :SYST:ERR? query.) Error summary Table B-4 summarizes calibration errors.

  • Page 125: Status Byte Eav (Error Available) Bit

    Command Reference Error 505 — Will occur when a :CAL:PROT:SOUR command generates an invalid source off- set calibration constant. Error 506 — Will occur when a :CAL:PROT:SOUR command generates an invalid source gain calibration constant. Error 507 — Will occur when a :CAL:PROT:SENS command generates an invalid measure- ment offset calibration constant.

  • Page 126: Detecting Calibration Step Completion

    B-10 Command Reference Detecting calibration step completion When sending remote calibration commands, you must wait until the instrument completes the current operation before sending another command. You can use either *OPC? or *OPC to help determine when each calibration step is completed. Using the *OPC? query With the *OPC? (operation complete) query, the instrument will place an ASCII 1 in the out- put queue when it has completed each step.

  • Page 127: Generating An Srq On Calibration Complete

    An IEEE-488 bus SRQ (service request) can be used to detect operation complete instead of repeatedly polling the Model 2430. To use this method, send both *ESE 1 and *SRE 32 to the instrument, then include the *OPC command at the end of each calibration command line, as covered above.
  • Page 128 B-12 Command Reference...

  • Page 129: Calibration Programs

    Calibration Programs...

  • Page 130: Introduction

    2430 and the multimeter to warm up for at least one hour before performing calibration. Make sure the Model 2430 is set for a primary address of 24. (Use the front panel MENU/GPIB selection to check or change the address.)
  • Page 131 Calibration Programs Ensure the digital multimeter primary address is set to its factory default setting (22). Ensure that the computer bus driver software (CECHP.EXE) is properly initialized. Enter the QBasic editor, and type in the program below. NOTE Be sure to change the OneOhm parameter to the characterized value of 1Ω resis- tor.(See Section 2 for details.) Check thoroughly for errors, then save it using a convenient filename.

  • Page 132: Program C-1 Model 2430 Calibration Program

    Calibration Programs Program C-1 Model 2430 calibration program ' Model 2430 calibration program for use with the HP3458A Digital Multimeter. ' Rev. 1.0, 12/1/98 ' 2430 primary address = 24. HP3458A primary address = 22. OPEN "IEEE" FOR OUTPUT AS #1 ' Open IEEE-488 output path.
  • Page 133 IF J = 2 AND Range > 9 AND Range < 11 THEN Range = 3 PRINT #1, "OUTPUT 24;:OUTP:STAT OFF" PRINT #1, "OUTPUT 22;FUNC DCV,AUTO" PRINT "Connect 1 Ohm resistor and DMM volts input to 2430." GOSUB KeyCheck PRINT #1, "OUTPUT 24;:OUTP:STAT ON" END IF...
  • Page 134 Calibration Programs INPUT #2, S RETURN ErrCheck: ' Error check routine. PRINT #1, "OUTPUT 24;:SYST:ERR?" ' Query error queue. PRINT #1, "ENTER 24" INPUT #2, E, Err$ IF E <> 0 THEN PRINT Err$: GOTO EndProg' Display error. RETURN ReadDMM: ' Get reading from DMM.

  • Page 135: Requesting Calibration Constants

    Requesting calibration constants Program C-2 listed below demonstrates how to request the calibration constants from the Model 2430. The program requests and displays the calibration constants for all ranges of both the volts and current source and measurement functions. Program C-2 Requesting calibration constants ' Example program to request calibration constants.
  • Page 136 Calibration Programs LINE INPUT #2, Data$ PRINT Data$ Range = Range * 10 IF Range > 9 AND Range < 11 THEN Range = 3 LOOP WHILE Range <= 3 PRINT #1, "OUTPUT 24;:CAL:PROT:LOCK" ' Lock out calibration. PRINT #1, "OUTPUT 24;*RST" PRINT #1, "LOCAL 24"...
  • Page 137 Index Calibration Considerations 2-2 Symbols Cycle 2-3 Equipment 2-3 10μA to 1A range accuracy 1-10, 1-13 Errors 2-7, B-9 1Ω resistor characterization 1-4, 2-4 Parameters 2-16 3A and 10A pulse range accuracy 1-11, 1-13 Remote 2-15 3A range current calibration test Remote command summary 2-16 connections 2-13 Remote calibration command summary...

  • Page 138: Performance Verification

    Current measurement Tests 4-3 Accuracy 1-13 Voltage calibration 2-10 Accuracy limits 1-14 Current range calibration commands 2-22 General program instructions C-2 Generating an SRQ on calibration complete B-11 Detecting calibration Generating an SRQ on error B-9 Errors B-8 Step completion B-10 Determining compliance limit 1-8 Digital Handling and cleaning 5-2...
  • Page 139 Supply checks 4-12 Power-on self-test 4-3 Unlocking Principles of operation 4-4 Calibration 2-4 Program C-1 Model 2430 calibration pro- Calibration by remote 2-5 gram C-4 Calibration from the front panel 2-4 Program C-2 Requesting calibration con- Using the *OPC command B-10...
  • Page 141 Service Form Model No. ______________ Serial No. __________________Date ________________ Name and Telephone No. _________________________________________________ Company ______________________________________________________________ List all control settings, describe problem and check boxes that apply to problem. _________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ q Intermittent q Analog output follows display q Particular range or function bad; specify _______________________________ q IEEE failure q Obvious problem on power-up...

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