Keithley 2400 Service Manual
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Keithley 2400 Service Manual

Sourcemeter
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Model 2400 SourceMeter
Service Manual
2400-902-01 Rev. G / February 2006
ECA 41379
A
G R E A T E R
M E A S U R E
O F
C O N F I D E N C E

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Summary of Contents for Keithley 2400

  • Page 1 ® Model 2400 SourceMeter Service Manual 2400-902-01 Rev. G / February 2006 ECA 41379 G R E A T E R M E A S U R E C O N F I D E N C E...
  • 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 Model 2400 SourceMeter ® Service Manual ©1996, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Seventh Printing, February 2006 Document Number: 2400-902-01 Rev. G...
  • Page 4 Revision F (Document Number 2400-902-01)..............July 2004 Revision G (Documnet Number 2400-902-01) ............February 2006 All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc. Other brand names are trademarks or registered trademarks of their respective holders.
  • Page 5 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 6 (Note that selected parts should be purchased only through Keithley Instruments to maintain accuracy and functionality of the product.) If you are unsure about the applicability of a replacement component, call a Keithley Instruments office for information.

  • Page 7: 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 Verification limits ..............1-3 Restoring factory defaults ............1-4 Performing the verification test procedures ....... 1-5 Test summary ..............
  • Page 8 Remote calibration ..............2-16 Remote calibration commands .......... 2-16 Remote calibration procedure ........... 2-18 Single-range calibration ............2-22 Routine Maintenance Introduction ................3-2 Line fuse replacement ..............3-2 Troubleshooting Introduction ................4-2 Repair considerations ..............4-2 Power-on self-test ............... 4-2 Front panel tests ................
  • Page 9 Introduction ................C-2 Computer hardware requirements ..........C-2 Software requirements .............. C-2 Calibration equipment ............... C-2 General program instructions ............ C-3 Program C-1. Model 2400 calibration program ....C-3 Requesting calibration constants ..........C-6 Program C-2. Requesting calibration constants ....C-6...

  • Page 11: List Of Illustrations

    List of Illustrations Performance Verification Figure 1-1 Voltage verification front panel connections ......1-9 Figure 1-2 Current verification connections........... 1-11 Figure 1-3 Resistance verification connections........1-15 Calibration Figure 2-1 Voltage calibration connections ..........2-9 Figure 2-2 Current calibration connections ..........2-12 Routine Maintenance Figure 3-1 Rear panel ................

  • Page 12: List Of Tables

    List of Tables Performance Verification Table 1-1 Recommended verification equipment ........1-3 Table 1-2 Output voltage accuracy limits ..........1-9 Table 1-3 Voltage measurement accuracy limits ........1-10 Table 1-4 Output current accuracy limits ..........1-12 Table 1-5 Current measurement accuracy limits ........1-13 Table 1-6 Ohms measurement accuracy limits ........

  • Page 13: Performance Verification

    Performance Verification...

  • Page 14: Introduction

    Model 2400 Service Manual Performance Verification Introduction Use the procedures in this section to verify that Model 2400 accuracy is within the limits stated in the instrument’s one-year accuracy specifications. You can perform these verification procedures: • When you first receive the instrument to make sure that it was not damaged during shipment.

  • Page 15: Line Power

    Model 2400 Series User’s Manual Performance Verification Line power The Model 2400 requires a line voltage of 100 to 240V and a line frequency of 50 or 60Hz. Verification tests should be performed within this range. Recommended test equipment Table 1-1 summarizes recommended verification equipment. You can use alternate equipment as long as that equipment has specifications at least as good as those listed in Table 1-1.

  • Page 16: Restoring Factory Defaults

    As an example of how verification limits are calculated, assume you are testing the 20V DC output range using a 20V output value. Using the Model 2400 one-year accuracy specification for 20V DC output of ±(0.02% of output + 2.4mV offset), the calculated output limits are: Output limits = 20V ±...

  • Page 17: Performing The Verification Test Procedures

    DC current measurement accuracy • Resistance measurement accuracy If the Model 2400 is not within specifications and not under warranty, see the calibration procedures in Section 2 for information on calibrating the unit. Test considerations When performing the verification procedures: •...

  • Page 18: Setting The Source Range And Output Value

    There are two types of compliance that can occur: “real” and “range.” Depending upon which value is lower, the output will clamp at either the displayed compliance setting (“real”) or at the maximum measurement range reading (“range”). 2400-902-01 (G - Feb 2006)

  • Page 19: Maximum Compliance Values

    Model 2400 Series User’s Manual Performance Verification The “real” compliance condition can occur when the compliance setting is less than the highest possible reading of the measurement range. When in compliance, the source output clamps at the displayed compliance value. For example, if the compliance voltage is set to 1V and the measurement range is 2V, the output voltage will clamp (limit) at 1V.

  • Page 20: Taking The Sourcemeter Out Of Compliance

    SOURCE V to access the CONFIGURE V-SOURCE menu, then select PROTEC- TION and set the limit value to >200V. Press the Model 2400 SOURCE V key to source voltage, and make sure the source out- put is turned on. Verify output voltage accuracy for each of the voltages listed in Table 1-2. For each test point: •...
  • Page 21 Model 2400 Series User’s Manual Performance Verification Figure 1-1 Voltage verification front panel connections 4-WIRE INPUT/ SENSE OUTPUT 250V 250V PEAK PEAK PEAK 2400 SourceMeter 250V MEAS SOURCE PEAK Ω EDIT FCTN RANGE DISPLAY EDIT TOGGLE AUTO TERMINALS LOCAL FILTER...

  • Page 22: Voltage Measurement Accuracy

    SOURCE V to access the CONFIGURE V-SOURCE menu, then select PROTEC- TION and set the limit value to >200V. Set the Model 2400 to both source and measure voltage by pressing the SOURCE V and MEAS V keys, and make sure the source output is turned on.

  • Page 23: Output Current Accuracy

    With the power off, connect the digital multimeter to the Model 2400 INPUT/OUTPUT jacks, as shown in Figure 1-2. Select the multimeter DC current measuring function. Press the Model 2400 SOURCE I key to source current, and make sure the source out- put is turned on. Figure 1-2...

  • Page 24: Current Measurement Accuracy

    Figure 1-2. Select the multimeter DC current function. Set the Model 2400 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 25: Resistance Measurement Accuracy

    Resistance measurement accuracy Follow the steps below to verify that Model 2400 resistance measurement accuracy is within specified limits. This procedure involves applying accurate resistances from a resistance calibrator and then verifying that Model 2400 resistance measurements are within required limits.
  • Page 26 100.670MΩ ** Nominal resistance value. ** Reading limits based on Model 2400 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 2400 normal accuracy specifications. See “Verification limits” earlier in this section for details.
  • Page 27 1-15 Model 2400 Series User’s Manual Performance Verification Figure 1-3 Resistance verification connections 4-WIRE INPUT/ SENSE OUTPUT 250V 250V PEAK PEAK PEAK 2400 SourceMeter 250V MEAS SOURCE PEAK Ω EDIT FCTN RANGE DISPLAY EDIT TOGGLE AUTO TERMINALS LOCAL FILTER LIMIT...
  • Page 28 Model 2400 Service Manual 1-16 Performance Verification 2400-902-01 (G - Feb 2006)

  • Page 29: Calibration

    Calibration...

  • Page 30: Introduction

    Also, allow the test equipment to warm up for the minimum time specified by the manufacturer. Line power The Model 2400 requires a line voltage of 100 to 240V at line frequency of 50 or 60Hz. The instrument must be calibrated within this range. 2400-902-01 (G - Feb 2006)

  • Page 31: Calibration Considerations

    • Always allow the source signal to settle before calibrating each point. • Do not connect test equipment to the Model 2400 through a scanner or other switching equipment. • If an error occurs during calibration, the Model 2400 will generate an appropriate error message.

  • Page 32: Recommended Calibration Equipment

    When possible, test equipment specifications should be at least four times better than corresponding Model 2400 specifications. Table 2-1 Recommended calibration equipment...
  • Page 33 :ARM:SOUR IMMediate Trigger Count :TRIG:COUNT 1 Trigger Source Immediate :TRIG:SOUR IMMediate Remote calibration password To unlock calibration via remote, send the following command: :CAL:PROT:CODE '<password>' For example, the following command uses the default password: :CAL:PROT:CODE 'KI002400' 2400-902-01 (G - Feb 2006)

  • Page 34: Changing The Password

    See Section 5 for details on disassembling the unit to access the CAL pads. Refer to the display board component layout drawing at the end of Section 6 for the location of the CAL pads. 2400-902-01 (G - Feb 2006)

  • Page 35: Viewing Calibration Dates And Calibration Count

    (Use the *STB? query to request the status byte.) Query the instrument for the type of error by using the appropriate :SYST:ERR? query. The Model 2400 will respond with the error number and a text message describing the nature of the error. See Appendix B for details.

  • Page 36: Front Panel Calibration

    Step 1. Prepare the Model 2400 for calibration Turn on the Model 2400 and the digital multimeter, and allow them to warm up for at least one hour before performing calibration.
  • Page 37 Input LO Digital Multimeter Note and record the DMM reading, and then adjust the Model 2400 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.) Note that the display adjustment range is within ±10% of the present range.
  • Page 38 © ¹ ƒ Note and record the DMM reading, and then adjust the Model 2400 display to agree with the DMM reading. Again, the maximum display adjustment is within ±10% of the present range. After adjusting the display value to agree with the DMM reading, press ENTER, and...
  • Page 39 +20.000V ____________Vm +00.000V ____________Vm -20.000V ____________Vm -00.000V ____________Vm 200V +200.00V ____________Vm +000.00V ____________Vm -200.00V ____________Vm -000.00V ____________Vm **Use EDIT and RANGE keys to select source range. **Multimeter reading used in corresponding calibration step. See procedure. 2400-902-01 (G - Feb 2006)
  • Page 40 Step 3. Current calibration Perform the following steps for each current range using Table 2-4 as a guide. Connect the Model 2400 to the digital multimeter as shown in Figure 2-2. Select the multimeter DC current measurement function. From normal display, press the SOURCE I key.
  • Page 41 ¹ ƒ Note and record the DMM reading, and then adjust the Model 2400 display to agree exactly with the actual DMM reading. (Use the up and down arrow keys to select the digit value; use the left and right arrow keys to choose the digit position.) Note that the display adjustment range is within ±10% of the present range.
  • Page 42 +100.00mA ____________mA +000.00mA ____________mA -100.00mA ____________mA -000.00mA ____________mA 01A0 +1.0000A _____________A +0.0000A _____________A -1.0000A _____________A -0.0000A _____________A **Use EDIT and RANGE keys to select source range. **Multimeter reading used in corresponding calibration step. See procedure. 2400-902-01 (G - Feb 2006)
  • Page 43 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 2400 will display the following: CALIBRATION UNLOCK EXECUTE VIEW-DATES © SAVE LOCK CHANGE-PASSWORD ß...

  • Page 44: Remote Calibration

    Cal commands protected by password. :CODE '<password>' Unlock cal: changes password if cal is already unlocked. (Default password: KI002400.) :COUNT? Query number of times 2400 has been calibrated. :SAVE Save calibration data to EEPROM.* :LOCK Lock calibration, inhibit SAVE command operation.
  • Page 45 -0.9 to -1.1 -1E-2 to +1E-2 +0.9 to +1.1 -1E-2 to +1E-2 NOTE: Parameter steps for each range may be performed in any order, but all four parameter steps for each range must be completed. 2400-902-01 (G - Feb 2006)

  • Page 46: Remote Calibration Procedure

    Connect the Model 2400 to the controller IEEE-488 interface or RS-232 port using a shielded interface cable. Turn on the Model 2400 and the test equipment, and allow them to warm up for at least one hour before performing calibration.
  • Page 47 Send the source and sense calibration commands using the multimeter reading for the parameter. For example: :CAL:PROT:SOUR 1E-3 :CAL:PROT:SENS 1E-3 • Set the source to the positive full-range value using the :SOUR:VOLT command. For example: :SOUR:VOLT 2 • Note and record the multimeter reading. 2400-902-01 (G - Feb 2006)
  • Page 48 For example: :CAL:PROT:SOUR -1.02E-3 Step 3. Current Calibration Connect the Model 2400 to the digital multimeter (see Figure 2-2), and select the multi- meter DC current function. Send the commands summarized in Table 2-10 in the order listed to initialize current calibration.
  • Page 49 Note and record the multimeter reading. • Send the source and sense commands using the multimeter reading as the parameter. For example: :CAL:PROT:SOUR 1.03E-3 :CAL:PROT:SENS 1.03E-3 • Send the :SOUR:CURR 0.0 command to set the source current to 0A. 2400-902-01 (G - Feb 2006)

  • Page 50: Single-Range Calibration

    To do so, simply complete the entire procedure only for the range(s) to be calibrated. Keep in mind, however, that you must complete all parameter steps for each source or sense range. Also, be sure to set calibration dates and save calibration after calibrating the desired range(s). 2400-902-01 (G - Feb 2006)

  • Page 51: Routine Maintenance

    Routine Maintenance...

  • Page 52: Line Fuse Replacement

    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. 250V, 2.5A, slow blow 5 × 20mm 100-240V FU-106-2.5 2400-902-01 (G - Feb 2006)

  • Page 53: Rear Panel

    4-WIRE INPUT/ 250V FUSE DRAWER SENSE OUTPUT PEAK IEEE-488 (ENTER IEEE ADDRESS OUTPUT WITH FRONT PANEL MENU) TRIGGER ENABLE LINK RS-232 CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE FUSE WITH SAME TYPE AND RATING. 2400-902-01 (G - Feb 2006)
  • Page 54 Model 2400 Service Manual Routine Maintenance 2400-902-01 (G - Feb 2006)

  • Page 55: Troubleshooting

    Troubleshooting...

  • Page 56: Introduction

    See Section 2 for details on calibrating the unit. Power-on self-test During the power-on sequence, the Model 2400 will perform a checksum test on its ROM and test its RAM. If the RAM tests fails, the instrument will lock up. If the ROM checksum test fails, the firmware upgrade mode is automatically enabled.

  • Page 57: Front Panel Tests

    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 SELF-TEST MENU. Continue pressing EXIT to back out of the menu structure. 2400-902-01 (G - Feb 2006)

  • Page 58: Char Set Test

    Figure 4-4 — Digital circuitry block diagram Analog circuits Figure 4-1 shows the overall block diagram for the Model 2400. D/A converters control the programmed voltage and current, or voltage compliance and current compliance. Each DAC has two ranges, a 10V output or a 1V output. The DAC outputs are fed to the summing node, FB.
  • Page 59 Figure 4-1 Analog circuit block diagram +220 -220 V DAC V Clamp Output Error Sense Output Stage Resistors I Clamp I DAC Output Remote Control Protection Guard Protection Guard Sense 2400-902-01 (G - Feb 2006)

  • Page 60: Power Supply

    Troubleshooting Power supply Figure 4-2 shows a block diagram of the Model 2400 power delivery system. The offline flyback switching power supply provides all power for the instrument while provid- ing universal inputs for the 110/120V line. The digital board runs directly from the switcher, including the +12VD supply.

  • Page 61: Output Stage

    Figure 4-3 shows a simplified schematic of the output stage. The Model 2400 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 62: A/D Converter

    Active guard The Model 2400 has an active guard or “six-wire ohms” circuit used to measure complex devices. 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 63 A key is read by strobing the columns and reading all rows for each strobed column. Key down data is inter- preted by the display microcontroller and sent back to the main microprocessor using propri- etary encoding schemes. 2400-902-01 (G - Feb 2006)

  • Page 64: Troubleshooting

    +5VF, referenced to Common F3 +15V ±5% +15VF, referenced to Common F2 -15V ±5% -15VF, referenced to Common F2. ~-35V -30VF, referenced to Common F2. ~+35V +30VF, referenced to Common F2. U18, pin 2. U8, pin 1. 2400-902-01 (G - Feb 2006)

  • Page 65: Digital Circuitry Checks

    SOURCE +10V 0V ±.1V TP218 OUTPUT COM 7V ±.7V TP219 OUTPUT COM 7V ±.7V TP214 SVMI, OUTPUT ON, 20V, on 20V RANGE 20V ±.5V TP232 Bench defaults 6.4V ±6V *Measured with respect to OUTPUT COM (TP501) 2400-902-01 (G - Feb 2006)

  • Page 66: Battery Replacement

    Disconnect the instrument from the power line and all other equipment before changing the battery. The volatile memories of the Model 2400 are protected by a replaceable battery when power is off. Typical life for the battery is approximately ten years, but the battery should be replaced if the voltage drops below 2.5V regardless of age.

  • Page 67: No Comm Link Error

    Carefully push down on each ROM IC to make sure it is properly seated in its socket. CAUTION Be careful not to push down excessively, or you might crack the digital board. Connect the line cord and turn on the power. If the problem persists, additional trouble- shooting will be required. 2400-902-01 (G - Feb 2006)
  • Page 68 Model 2400 Service Manual 4-14 Troubleshooting 2400-902-01 (G - Feb 2006)

  • Page 69: Disassembly

    Disassembly...

  • Page 70: Introduction

    Model 2400 Service Manual Disassembly Introduction This section explains how to handle, clean, and disassemble the Model 2400. 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 71: Static Sensitive Devices

    Use the assembly drawings located at the end of this section to assist you as you disassemble and reassemble the Model 2400. Also, refer to these drawings for information about the Kei- thley part numbers of most mechanical parts in the unit.

  • Page 72: Case Cover Removal

    You must disconnect these input terminal connections for both the front and rear inputs: • INPUT/OUTPUT HI and LO • 4-WIRE SENSE HI and LO V, Ω, GUARD, and GUARD SENSE (rear panel only) • 2400-902-01 (G - Feb 2006)
  • Page 73 Remove the four screws that secure the bottom cover, and then remove the cover from the bottom of the PC board. NOTE When reinstalling the heat sink, make sure that all clips are properly installed and centered on each pair of output transistors. 2400-902-01 (G - Feb 2006)

  • Page 74: Digital Board Removal

    Using a thin-bladed screwdriver, pry the plastic PC board stop (located at the bottom of the display board) until the bar separates from the casing. Pull the display board from the front panel. Remove the switch pad by pulling it from the front panel. 2400-902-01 (G - Feb 2006)

  • Page 75: Removing Power Components

    (green and yellow wire attached to the power module) is con- nected to the chassis. Also make certain that the two bottom case screws are properly installed to secure and ground the case cover to the chassis. 2400-902-01 (G - Feb 2006)
  • Page 76 Model 2400 Service Manual Disassembly 2400-902-01 (G - Feb 2006)

  • Page 77: Replaceable Parts

    Replaceable Parts...

  • Page 78: Introduction

    Model 2400. Parts lists The electrical parts lists for the Model 2400 are shown in the 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 79: Factory Service

    Model 2400 Service Manual Replaceable Parts Factory service If the instrument is to be returned to Keithley Instruments for repair, perform the following: • Call the Repair Department at 1-800-552-1115 for a Return Material Authorization (RMA) number. • Complete the service form at the back of this manual, and include it with the instrument.
  • Page 80 CAP, 2200P, 10%, 100V, CERAMIC C-430-2200P C616 CAP, 22UF, 20%, 25V, TANTALUM C-440-22 CR200-203,205,207,208,210,212,213,216, DIODE, SWITCHING, MMBD914 RF-83 221,235,236,602 CR204,206,209,211,222-225,230-233,400, DIODE, IN3595 RF-43 401,502-504 CR236,602,212,213 ULTRAFAST POWER RECTIFIER RF-105 CR237 DIODE, DUAL SWITCHING, BAV99L RF-82 2400-902-01 (G - Feb 2006)
  • Page 81 TRANS, P-FET, MTP20P06 TG-229 Q500,502,514,516 TRANS, N-CHANNEL FET, IRF630 TG-214 Q501,503,505,508,510,512,513,528 TRANS, NPN, MMBT3904 TG-238 Q504 TRANS, NPN, TIP48 TG-314 Q506,520,601,529 TRANS, PNP, MMBT3906L TG-244 Q507 TRANS, PMP, MJE5731A TG-315 Q509,511,523,525 TRANS, P-CHANNEL 200V FET, IRF9630 TG-215 2400-902-01 (G - Feb 2006)
  • Page 82 RES, 499, 1%, 100MW, THICK FILM R-418-499 R346 RES, 357K, 1%, 100MW, THICK FILM R-418-357K R347 RES, 332K, 1%, 100MW, THICK FILM R-418-332K R348 RES, 255K, 1%, 100MW, THICK FILM R-418-255K R354 RES, 1M, 5%, 250MW, METAL FILM R-376-1M 2400-902-01 (G - Feb 2006)
  • Page 83 RES, 10, 10%, 100MW, THICK FILM R-418-10 R650,651 RES NET, 9K-1K, MICRO DIVIDER TF-246-2 R652,665 RES, 357, 1%, 100MW, THICK FILM R-418-357 R656 RES, 10M, 1%, 125MW, THICK FILM R-418-10M R657,658 RES, 1M, 1%, 100MW, THICK FILM R-418-1M 2400-902-01 (G - Feb 2006)
  • Page 84 IC, DUAL PICOAMP OP-AMP, AD706JR IC-910 U601 IC, QUAD D FLIP FLOP W/CLK, IC-923 RESET 7474 U604 IC, NCHAN LAT DMOS QUADFET, IC-893 SD5400CY U605 INTEGRATED CIRCUIT, OPA177GS IC-960 U606,236 IC, HI-SPEED BIFET OP-AMP, AD711JR IC-894 2400-902-01 (G - Feb 2006)
  • Page 85 DZ-94 VR404-406 DIODE, ZENER, 5.1V, BZX84C5V1 DZ-88 VR500,501 DIODE, ZENER, 6.0V, BZX84B6V2 DZ-87 VR600 DIODE, ZENER, 6.4V, IN4579 DZ-73 VR602,603 DIODE, ZENER, 6.2V, MMSZ6V2 DZ-97 W401 JUMPER J-15 Y600 OSCILLATOR HIGH SPEED CMOS, 12MHZ CR-37 2400-902-01 (G - Feb 2006)
  • Page 86 CONN, RIGHT ANGLE, 24-PIN CS-507 CONN, RIGHT ANGLE, MALE, 9-PIN CS-761-9 CONN, CIRCULAR DIN CS-762 CONN, D-SUB MALE, BOARDLOCK TYPE CS-848-9 CONN, MOLEX, 3-PIN CS-772-3 FERRITE CHIP 600 OHM, BLM32A07 CH-62 BEEPER, 5V, 30MA, QMX-05 EM-6 2400-902-01 (G - Feb 2006)
  • Page 87 IC, DUAL D-TYPE F/F, 74HC74 IC-773 IC, MICROMANAGER, DS12365-10 IC-884 MICROCONTROLLER, MC68332-FC LSI-161 IC, +5V, RS-232 TRANSCEIVER, MAX202 IC-952 IC, OP-AMP, AD705JR IC-814 IC, OCTAL INTER BUS TRANS, 75161 IC-647 IC, 4-CHANNEL PWR DRIVER, 2549B IC-1044 2400-902-01 (G - Feb 2006)
  • Page 88 IC-646 IC, DUAL POWER MOSFET DRIVER, TSC42 IC-437 U23,25 IC, POS NAND GATES/INVERT, 74HCT14 IC-656 IC, TRIPLE 3 IN NAND, 74F10 IC-659 DIODE, ZENER, 33V, IN4752A DZ-68 CRYSTAL, FSM327 CR-41 *Order current firmware revision level. 2400-902-01 (G - Feb 2006)
  • Page 89 TRANSFORMER, TDK, ER14.5 SERIES TR-300 U901,904,905 IC, LATCHED DRIVERS, UCN-5812EPF-1 IC-732 U902 PROGRAMMED ROM 7001-800-* U903 IC, 32-BIT, SERIAL, UCN-5818EPF-1 IC-830 VR901 DIODE, ZENER, 8.2V, MMBZ5237 DZ-92 Y901 CRYSTAL, 4MHZ CR-36-4M *Order current firmware revision level. 2400-902-01 (G - Feb 2006)
  • Page 90 CO-7 LINE FILTER LF-11 MEMBRANE SWITCH, FRONT PANEL 2400-313A POWER ROD 704-313A POWER SUPPLY PS-41A REAR BEZEL 428-303D RED BANANA JACK BJ-13-2 RIGHT MOUNTING EAR 428-328E SWITCHPAD 2400-315A TEST LEADS CA-22 WHITE BANANA JACK BJ-13-9 2400-902-01 (G - Feb 2006)

  • Page 91: Specifications

    Specifications...
  • Page 92 ® 2400, 2400-LV and 2400-C SourceMeter Specifications SOURCE SPECIFICATIONS ADDITIONAL SOURCE SPECIFICATIONS TRANSIENT RESPONSE TIME: 30 µs minimum for the output to VOLTAGE PROGRAMMING ACCURACY (LOCAL OR REMOTE SENSE) recover to its spec. following a step change in load ACCURACY (1 Year)
  • Page 93 ® 2400, 2400-LV and 2400-C SourceMeter Specifications MEASURE SPECIFICATIONS CONTACT CHECK SPECIFICATIONS VOLTAGE MEASUREMENT ACCURACY (LOCAL OR REMOTE SPEED: 350µs for verification and notification. SENSE) CONTACT CHECK: 2Ω 15Ω 50Ω ACCURACY (1 Year) No contact check failure <1.00Ω <13.5Ω <47.5Ω...
  • Page 94 ACCESSORIES SUPPLIED: Test Leads, User’s Manual, Service Manual, LabVIEW and TestPoint Drivers. HW 2/25/04 Rev. H Specifications subject to change without notice. Page 3 of 3 SourceMeter® is a registered trademark of Keithley Instruments, Inc. All other trademarks are the property of their respective companies.
  • Page 95 ® 2410 and 2410-C SourceMeter Specifications SOURCE SPECIFICATIONS ADDITIONAL SOURCE SPECIFICATIONS VOLTAGE PROGRAMMING ACCURACY (LOCAL OR REMOTE SENSE) TRANSIENT RESPONSE TIME: 30 µs minimum for the ACCURACY (1 Year) NOISE output to recover to its spec. following a step change in load 23°C ±5°C PROGRAMMING (peak-peak)
  • Page 96 ® 2410 and 2410-C SourceMeter Specifications MEASURE SPECIFICATIONS CONTACT CHECK SPECIFICATIONS VOLTAGE MEASUREMENT ACCURACY (LOCAL OR REMOTE SENSE) SPEED: 350µs for verification and notification. ACCURACY (1 Year) CONTACT CHECK: 2Ω 15Ω 50Ω 23°C ±5°C DEFAULT INPUT No contact check failure <1.00Ω...
  • Page 97 (3 yr+ battery life). LabVIEW and TestPoint Drivers. Specifications subject to change without notice. SourceMeter® is a registered trademark of Keithley Instruments, Inc. All other trademarks are the property of their respective companies. HW 3/20/03 Rev. D Page 3 of 3...
  • Page 98 ® 2420 and 2420-C SourceMeter Specifications SOURCE SPECIFICATIONS ADDITIONAL SOURCE SPECIFICATIONS VOLTAGE PROGRAMMING ACCURACY (LOCAL OR REMOTE SENSE) TRANSIENT RESPONSE TIME: 30 µs minimum for the ACCURACY (1 Year) NOISE output to recover to its spec. following a step change in load 23°C ±5°C PROGRAMMING (peak-peak)
  • Page 99 ® 2420 and 2420-C SourceMeter Specifications MEASURE SPECIFICATIONS CONTACT CHECK SPECIFICATIONS SPEED: 350µs for verification and notification. VOLTAGE MEASUREMENT ACCURACY (LOCAL OR REMOTE SENSE) ACCURACY (1 Year) CONTACT CHECK: 2Ω 15Ω 50Ω 23°C ±5°C DEFAULT No contact check failure <1.00Ω <13.5Ω...
  • Page 100 ACCESSORIES SUPPLIED: Test Leads, User’s Manual, Service Manual, LabVIEW and TestPoint Drivers. Specifications subject to change without notice. HW 1/17/05 SourceMeter® is a registered trademark of Keithley Instruments, Inc. All other trademarks are the property of their respective companies. Rev. C Page 3 of 3...
  • Page 101 ® 2425 and 2425-C SourceMeter Specifications SOURCE SPECIFICATIONS ADDITIONAL SOURCE SPECIFICATIONS VOLTAGE PROGRAMMING ACCURACY (LOCAL OR REMOTE SENSE) TRANSIENT RESPONSE TIME: 30 µs minimum for the ACCURACY (1 Year) NOISE output to recover to its spec. following a step change in load 23°C ±5°C PROGRAMMING (peak-peak)
  • Page 102 ® 2425 and 2425-C SourceMeter Specifications MEASURE SPECIFICATIONS CONTACT CHECK SPECIFICATIONS VOLTAGE MEASUREMENT ACCURACY (LOCAL OR REMOTE SENSE) SPEED: 350µs for verification and notification. ACCURACY (1 Year) 23°C ±5°C DEFAULT CONTACT CHECK: 2Ω 15Ω 50Ω ±(% rdg. + volts) RANGE RESOLUTION INPUT RESISTANCE No contact check...
  • Page 103 ACCESSORIES SUPPLIED: Test Leads, User’s Manual, Service Manual, LabVIEW and TestPoint Drivers. Specifications subject to change without notice. HW 3/20/03 Rev. C SourceMeter® is a registered trademark of Keithley Instruments, Inc. All other trademarks are the property of their respective companies. Page 3 of 3...
  • Page 104 ® 2430 and 2430-C SourceMeter Specifications SOURCE SPECIFICATIONS ADDITIONAL PULSE MODE SOURCE SPECIFICATIONS VOLTAGE PROGRAMMING ACCURACY (LOCAL OR REMOTE SENSE) MAXIMUM DUTY CYCLE: 8%, hardware limited, 10A ACCURACY (1 Year) NOISE range only. All other ranges 84%. 23°C ±5°C PROGRAMMING (peak-peak) ±(% rdg.
  • Page 105 ® 2430 and 2430-C SourceMeter Specifications 1,2,5 MEASURE SPECIFICATIONS CONTACT CHECK SPECIFICATIONS VOLTAGE MEASUREMENT ACCURACY (LOCAL OR REMOTE SENSE) SPEED: 350µs for verification and notification. ACCURACY (1 Year) 23°C ±5°C DEFAULT CONTACT CHECK: 2Ω 15Ω 50Ω ±(% rdg. + volts) RANGE RESOLUTION INPUT RESISTANCE...
  • Page 106 (3 yr+ battery life). LabVIEW and TestPoint Drivers. Specifications subject to change without notice. HW 8/10/05 SourceMeter® is a registered trademark of Keithley Instruments, Inc. All other trademarks are the property of their respective companies. Rev. D Page 3 of 3...
  • Page 107 ® 2440 and 2440-C SourceMeter Specifications SOURCE SPECIFICATIONS ADDITIONAL SOURCE SPECIFICATIONS VOLTAGE PROGRAMMING ACCURACY (LOCAL OR REMOTE SENSE) TRANSIENT RESPONSE TIME: 30 µs minimum for the ACCURACY (1 Year) NOISE output to recover to its spec. following a step change in load 23°C ±5°C PROGRAMMING (peak-peak)
  • Page 108 ® 2440 and 2440-C SourceMeter Specifications MEASURE SPECIFICATIONS CONTACT CHECK SPECIFICATIONS VOLTAGE MEASUREMENT ACCURACY (LOCAL OR REMOTE SENSE) SPEED: 350µs for verification and notification. ACCURACY (1 Year) 23°C ±5°C DEFAULT CONTACT CHECK: 2Ω 15Ω 50Ω ±(% rdg. + volts) RANGE RESOLUTION INPUT RESISTANCE No contact check...
  • Page 109 ACCESSORIES SUPPLIED: Test Leads, User’s Manual, Service Manual, LabVIEW and TestPoint Drivers. Specifications subject to change without notice. SourceMeter® is a registered trademark of Keithley Instruments, Inc. All other trademarks are the property of their respective companies. HW 3/26/03 Rev. C...

  • Page 110: Accuracy Calculations

    A-20 Accuracy calculations The information below discusses how to calculate accuracy for both sense and source functions. Measure 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 111: Command Reference

    Command Reference...

  • Page 112: Introduction

    Command Reference Introduction This appendix contains detailed information on the various Model 2400 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 2400 calibration commands.

  • Page 113: Miscellaneous Commands

    Example Send default code of KI002400. :CAL:PROT:CODE 'KI002400' :COUNT? (:CALibration:PROTected:COUNT?) Purpose To request the number of times the Model 2400 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 2400 has been calibrated.
  • Page 114 Command Reference :LOCK (:CALibration:PROTected:LOCK) Purpose To lock out calibration. Format :cal:prot:lock Query :cal:prot:lock? Response Calibration unlocked Calibration locked Description The :LOCK command lets you lock out comprehensive calibration after completing those procedures. Thus, :LOCK performs the opposite of send- ing the password with the :CODE command. The :LOCK? query returns calibration lock status.
  • Page 115 Command Reference :DATE (:CALibration:PROTected:DATE) Purpose To program the calibration date. Format :cal:prot:date <year>, <month>, <day> Parameter <year> = 1995 to 2094 <month> = 1 to 12 <day> = 1 to 31 Query :cal:prot:date? Response <year> , <month> , <day> Description The :DATE command allows you to store the calibration date in instrument EEROM for future reference.
  • Page 116 :CAL:PROT:SENS command for each parameter listed in Table B-2. Note When the Model 2400 receives this command, it will attempt to place the parameter into one of the three parameter ranges summarized, in Table B-2, depending 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...
  • Page 117 :CAL:PROT:SOUR command for each parameter listed in Table B-3. Note When the Model 2400 receives this command, it will attempt to place the parameter into one of the four parameter ranges summarized in Table B-3, depending 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...
  • Page 118 Command Reference Table B-3 :CALibration:PROTected:SOURce parameter ranges First parameter Second parameter Third parameter Fourth parameter Source range (negative full scale) (negative zero) (positive full scale) (positive zero) 0.2V -0.18 to -0.22 -0.002 to +0.002 +0.18 to +0.22 -0.002 to +0.002 -1.8 to -2.2 -0.02 to +0.02...

  • Page 119: Detecting Calibration Errors

    Several methods to detect calibration errors are discussed in the following paragraphs. Reading the error queue As with other Model 2400 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 120: Status Byte Eav (Error Available) Bit

    B-10 Command Reference Error 508 Will occur when a :CAL:PROT:SENS command generates an invalid measurement gain calibration constant. Table B-4 Calibration errors Error number Error message +500 “Date of calibration not set” +501 “Next date of calibration not set” +502 “Calibration data invalid”...

  • Page 121: Detecting Calibration Step Completion

    Command Reference B-11 Detecting calibration step completion When sending remote calibration commands, you must wait until the instrument completes the present 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 output queue when it has completed each step.

  • Page 122: 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 2400. To use this method, send both *ESE 1 and *SRE 32 to the instrument, and then include the *OPC command at the end of each calibration command line, as previously discussed.

  • Page 123: Calibration Programs

    Calibration Programs...

  • Page 124: Introduction

    This appendix includes a calibration program written in BASIC to help you calibrate the Model 2400, as well as an example program that demonstrates how to request calibration constants. Refer to Section 2 for more details on calibration procedures, equipment, and connections.

  • Page 125: General Program Instructions

    Model 2400 and the multimeter to warm up for at least one hour before performing calibration. Make sure the Model 2400 is set for a primary address of 24. (Use the front panel MENU/GPIB selection to check or change the address.) Make sure the digital multimeter primary address is set to its factory default setting (22).
  • Page 126 Calibration Programs PRINT #1, "OUTPUT 22;FUNC DCI,AUTO" PRINT "Connect DMM current input to 2400 INPUT/OUTPUT jacks." GOSUB KeyCheck END IF FOR I = 1 TO Max: READ Cmd$: PRINT #1, "OUTPUT 24;"; Cmd$: NEXT I WHILE Range <= Limit If J = 1 THEN RESTORE VoltsCal ELSE RESTORE CurrentCal IF J = 1 THEN PRINT "Calibrating volts."...
  • Page 127 Calibration Programs CalEnd: ' Check for cal step completion. DO: PRINT #1, "SRQ?" ' Request SRQ status. INPUT #2, S ' Input SRQ status byte. LOOP UNTIL S ' Wait for operation complete. PRINT #1, "OUTPUT 24;*ESR?" ' Clear OPC. PRINT #1, "ENTER 24"...

  • Page 128: Requesting Calibration Constants

    Requesting calibration constants Program C-2 listed below demonstrates how to request the calibration constants from the Model 2400. The program requests and displays the calibration constants for all ranges of both the volts and current measurement functions. Program C-2. Requesting calibration constants ' Example program to request calibration constants.
  • Page 129 Calibration Programs PRINT : PRINT "Model 2400 Current Calibration Constants:": PRINT ' Loop for all current ranges. PRINT #1, "OUTPUT 24;:SOUR:CURR:RANGE ";Range PRINT #1, "OUTPUT 24;:CAL:PROT:SENS:DATA?" PRINT #1, "ENTER 24" LINE INPUT #2, Data$ PRINT Data$ PRINT #1, "OUTPUT 24;:CAL:PROT:SOUR:DATA?"...
  • Page 130 Calibration Programs...
  • Page 131 Index Detecting calibration errors B-9 Error summary B-9 Generating an SRQ on error B-10 Reading the error queue B-9 A/D converter 4-8 Status byte EAV (Error Available) bit Accuracy calculations A-20 B-10 Active guard 4-8 Detecting calibration step completion B-11 Analog board parts list 6-4 Generating calibration...
  • Page 132 Instrument reassembly 5-7 Recommended calibration equipment 2-4 Internal fuse replacement 4-12 Recommended test equipment 1-3 Introduction 1-2 Recommended verification equipment 1-3 Remote calibration 2-16 command summary 2-16 procedure 2-18 Remote calibration command summary 2-16 Line fuse replacement 3-2 Line power 1-3 Removing power components 5-7 Power module removal 5-7 Power supply removal 5-7...
  • Page 133 Verification 1-2 Verification test requirements 1-2 Viewing calibration dates and calibration count Voltage accuracy 1-6 limit 1-10 readback 1-10 Voltage measurement accuracy limits 1-10 Warm-up period 1-2...
  • Page 135 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. _________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ Intermittent Analog output follows display Particular range or function bad; specify _______________________________ IEEE failure Obvious problem on power-up...
  • Page 137 M E A S U R E C O N F I D E N C E Keithley Instruments, Inc. Corporate Headquarters • 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: 440-248-6168 • 1-888-KEITHLEY (534-8453) • www.keithley.com 12/04...

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