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Keithley SourceMeter 2430, Руководство по обслуживанию

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Troubleshooting         4-9

A/D converter

The SourceMeter unit uses a multi-slope charge balance A/D converter with a single-slope 

run-down. The converter is controlled by gate array U610. Commands are issued by the MPU 
on the digital board through communications opto-isolators to U610, and U610 sends A/D read-
ing data back through opto-isolators to the digital board for calibration and processing.

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. If the unit is in the SI mode, the voltage on output HI is equal to the source cur-
rent multiplied by the external resistance value. An equivalent voltage will be generated by the 
guard circuit, and a guard sense terminal is provided to sense around the voltage drop in the 
guard leads since significant current can flow (50mA).

Digital circuitry

Refer to Figure 4-5 for the following discussion on digital circuitry. 

The core digital circuitry uses a Motorola 68332 microcontroller running at 16.78MHz. The 

memory configuration includes two 256K 

×

 8-bit flash EEPROMs and two 128K 

×

 8-bit RAMs 

used in parallel to utilize the 16-bit data bus of the MPU. The RAM is battery backed-up, 
providing continued storage of data buffer information during power-down cycles, and flash 
ROM support allows internal firmware upgrades using either the serial or GPIB port for 
downloading new firmware. All calibration constants and the save 0 setup are stored in a 
separate serial EEPROM. Setups 1 through 4 are stored in battery backed-up RAM.

External communication is provided via GPIB and serial interfaces. A 9914 GPIB IEEE-488 

standard interface IC is used for the GPIB, and a 68332 Queued Serial Module (QSM) provides 
the serial UART. For internal communications, the Time Processing Unit (TPU) is used for serial 
communications with the front panel display module, and both the TPU and QSM handle digital-
to-analog interfacing.

Содержание SourceMeter 2430

Страница 1: ...Contains Calibrating and Servicing Information Model 2430 1kW Pulse SourceMeter Service Manual ...

Страница 2: ...Y DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS INC HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES SUCH EXCLUDED DAMAGES SHALL INCLUDE BUT ARE NOT LIMITED TO COSTS OF REMOVAL AND INSTALLA TION LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON OR DAMAGE TO PROP ERTY Keithley Instru...

Страница 3: ...TAIWAN 1FL 85 Po Ai Street Hsinchu Taiwan R O C 886 3 572 9077 Fax 886 3 572 9031 ...

Страница 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 ...

Страница 5: ...porate immediately into the manual Addenda are numbered sequentially When a new Revision is created all Addenda associated with the previous Revi sion of the manual are incorporated into the new Revision of the manual Each new Revision includes a revised copy of this print history page Revision A Document Number 2430 902 01 December 1998 Revision B Document Number 2430 902 01 June 2000 Revision C ...

Страница 6: ...Other brand names are trademarks or registered trademarks of their respective holders ...

Страница 7: ...ected to mains voltage or to voltage sources with high transient over voltages Measurement Category II connections require protection for high transient over voltages often as sociated with local AC mains connections Assume all measurement control and data I O connections are for connection to Category I sources unless otherwise marked or described in the Manual Exercise extreme caution when a sho...

Страница 8: ...tages The symbol indicates a connection terminal to the equipment frame The WARNING heading in a manual explains dangers that might result in personal injury or death Always read the associated information very carefully before performing the indicated procedure The CAUTION heading in a manual explains hazards that could damage the instrument Such damage may invalidate the war ranty Instrumentatio...

Страница 9: ... 6 Compliance considerations 1 7 Compliance limits 1 7 Types of compliance 1 7 Maximum compliance values 1 7 Determining compliance limit 1 8 Taking the SourceMeter out of compliance 1 8 Output voltage accuracy 1 8 Voltage measurement accuracy 1 9 Output current accuracy 1 10 Current measurement accuracy 1 13 Resistance measurement accuracy 1 14 2 Calibration Introduction 2 2 Environmental conditi...

Страница 10: ...rocedure 2 18 Single range calibration 2 23 3 Routine Maintenance Introduction 3 2 Line fuse replacement 3 2 4 Troubleshooting Introduction 4 2 Safety considerations 4 2 Repair considerations 4 2 Power on self test 4 3 Front panel tests 4 3 KEYS test 4 3 DISPLAY PATTERNS test 4 3 CHAR SET test 4 4 Principles of operation 4 4 Overall block diagram 4 5 Analog circuits 4 6 Power supply 4 7 Output sta...

Страница 11: ... 4 Digital board removal 5 5 Front panel disassembly 5 6 Removing power components 5 6 Power module removal 5 6 Instrument re assembly 5 7 6 Replacement Parts Introduction 6 2 Parts lists 6 2 Ordering information 6 2 Factory service 6 2 Component layouts 6 2 A Specifications Accuracy calculations A 11 Measurement accuracy A 11 Source accuracy A 11 B Command Reference Introduction B 2 Command summa...

Страница 12: ...0 Using the OPC query B 10 Using the OPC command B 10 Generating an SRQ on calibration complete B 11 C Calibration Programs 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 ...

Страница 13: ...rification 1 15 2 Calibration Figure 2 1 Voltage calibration test connections 2 8 Figure 2 2 10µA to 1A range current calibration test connections 2 11 Figure 2 3 3A range current calibration test connections 2 13 3 Routine Maintenance Figure 3 1 Rear panel 3 2 4 Troubleshooting Figure 4 1 Overall block diagram 4 5 Figure 4 2 Analog circuitry block diagram 4 6 Figure 4 3 Power supply block diagram...

Страница 14: ...ummary 2 16 Table 2 6 Recommended CALibration PROTected SENse parameter ranges 2 17 Table 2 7 Recommended CALibration PROTected SOURce parameter ranges 2 17 Table 2 8 Voltage calibration initialization commands 2 19 Table 2 9 Voltage range calibration commands 2 20 Table 2 10 Current calibration initialization commands 2 21 Table 2 11 Current range calibration commands 2 22 3 Routine Maintenance T...

Страница 15: ...able 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 ...

Страница 16: ......

Страница 17: ...1 Performance Verification ...

Страница 18: ...nt is still under warranty and its performance is outside specified limits con tact your Keithley representative or the factory to determine the correct course of action Verification test requirements Be sure that you perform the verification tests Under the proper environmental conditions After the specified warm up period Using the correct line voltage Using the proper test equipment Using the s...

Страница 19: ...owable uncertainty for alternate test equipment shown in parentheses Table 1 1 Recommended verification equipment Description Manufacturer Model Specifications Digital Multimeter Hewlett Packard HP3458A DC Voltage1 1V 10V 100V 5 6ppm 4 3ppm 6 3ppm DC Current2 10μA 100μA 1mA 10mA 100mA 1A 25ppm 23ppm 20ppm 20ppm 35ppm 110ppm Resistance Calibrator Fluke 5450A Resistance2 1 9Ω 19Ω 190Ω 1 9kΩ 19kΩ 190...

Страница 20: ...s are calculated assume you are testing the 20V DC output range using a 20V output value Using the Model 2430 20V range one year accuracy specification of 0 02 of output 2 4mV offset the calculated output limits are Output limits 20V 20V 0 02 2 4mV Output limits 20V 0 004 0 0024 Output limits 20V 0 0064V Output limits 19 9936V to 20 0064V Resistance limits calculation When verifying the resistance...

Страница 21: ...LTS BENCH GPIB 5 Select BENCH then press ENTER to restore bench defaults Performing the verification test procedures Test summary DC voltage output accuracy DC voltage measurement accuracy DC current output accuracy 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 i...

Страница 22: ... as outlined below 1 Press either the SOURCE V or SOURCE I key to select the appropriate source function 2 Press the EDIT key as required to select the source display field Note that the cursor will flash in the source field while its value is being edited 3 With the cursor in the source display field flashing set the source range to the lowest possible range for the value to be sourced using the ...

Страница 23: ...rement 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 Range compliance can occur when the compliance setting is higher than the possible read ing of the selected measurement range When in compliance the source output clamps at the maximum...

Страница 24: ...measurement range is the compliance limit Taking the SourceMeter out of compliance Verification measurements should not be made when the SourceMeter is in compliance For purposes of the verification tests the SourceMeter can be taken out of compliance by going into the edit mode and increasing the compliance limit NOTE Do not take the unit out of compliance by decreasing the source value or changi...

Страница 25: ...tive output voltages with the same magnitudes as those listed in Table 1 3 6 Repeat the entire procedure using the rear panel INPUT OUTPUT jacks Be sure to select the rear panel jacks with the front panel TERMINALS key Table 1 3 Output voltage accuracy limits Model 2430 source range Model 2430 output voltage setting Output voltage limits 1 year 18 C to 28 C 200mV 2V 20V 100V 200 000mV 2 00000V 20 ...

Страница 26: ...ire procedure using the rear panel INPUT OUTPUT jacks Be sure to select the rear panel jacks with the front panel TERMINALS key Table 1 4 Voltage measurement accuracy limits Model 2430 source and measure range1 Source voltage2 Model 2430 voltage reading limits 1 year 18 C to 28 C 200mV 2V 20V 100V 200 000mV 2 00000V 20 0000V 100 000V 199 676 to 200 324mV 1 99946 to 2 00054V 19 9960 to 20 0040V 99 ...

Страница 27: ...A 1A range currents listed in Table 1 5 For each test point Select the correct source range Set the Model 2430 output current to the correct value Verify that the multimeter reading is within the limits given in the table 5 Repeat the procedure for negative output currents with the same magnitudes as those listed in Table 1 5 6 Repeat the entire procedure using the rear panel INPUT OUTPUT jacks Be...

Страница 28: ...n 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 5 Repeat the procedure for a negative 3A current output value 6 Repeat the entire procedure using the rear panel INPUT OUTPUT jacks Be sure to select the rear panel jacks with the front panel TERMINALS key Table ...

Страница 29: ...ay not be possible to set the current source to the specified value Use the closest possible setting and modify reading limits accordingly 5 Repeat the procedure for negative calibrator currents with the same magnitudes as those listed in Table 1 6 6 Repeat the entire procedure using the rear panel INPUT OUTPUT jacks Be sure to select the rear panel jacks with the front panel TERMINALS key 3A and ...

Страница 30: ...its Model 2430 source and measure range1 Source current2 Model 2430 current reading limits 1 year 18 C to 28 C 10μA 100μA 1mA 10mA 100mA 1A 3A 10 00000μA 100 000μA 1 00000mA 10 0000mA 100 000mA 1 00000A 3 00000A 9 9966 to 10 0034μA 99 969 to 100 031μA 0 99967 to 1 00033mA 9 9959 to 10 0041mA 99 939 to 100 061mA 0 99883 to 1 00117A 2 99673 to 3 00327A3 1 Measure range coupled to source range when s...

Страница 31: ...ange The 1A test current for the 2 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 1 With the power off connect the resistance calibrator to the Model 2430 INPUT OUTPUT and 4 WIRE SENSE jacks as shown in Figure 1 4 Be sure to use the 4 wire connections as shown Model 2430 Re...

Страница 32: ...ropriate ohms measurement range with the RANGE keys Verify that the Model 2430 resistance reading is within the limits given in the table 6 Repeat the entire procedure using the rear panel INPUT OUTPUT and 4 WIRE SENSE jacks Be sure to select the rear panel jacks with the front panel TERMINALS key Table 1 7 Ohms measurement accuracy limits Model 2430 range Calibrator resistance1 Model 2430 resista...

Страница 33: ...2 Calibration ...

Страница 34: ...one hour before performing calibration If the instrument has been subjected to temperature extremes those outside the ranges stated above allow additional time for the instrument s internal temperature to stabilize Typically allow one extra hour to stabilize a unit that is 10 C 18 F outside the specified temperature range Also allow the test equipment to warm up for the minimum time specified by t...

Страница 35: ...y is approximately 10 years but the battery should be replaced if the voltage drops below 2 5V regardless of age See Section 4 for battery replacement de tails Recommended calibration equipment Table 2 1 lists the recommended equipment for the calibration procedures You can use al ternate equipment as long as that equipment has specifications comparable to those listed in the table For optimum cal...

Страница 36: ...ng CALIBRATION UNLOCK EXECUTE VIEW DATES SAVE LOCK CHANGE PASSWORD 2 Select UNLOCK then press ENTER The instrument will display the following PASSWORD Use ß ƒ ENTER or EXIT 3 Use the up and down RANGE keys to select the letter or number and use the left and right arrow keys to choose the position Press down RANGE for letters up RANGE for numbers Enter the present password on the display Front pane...

Страница 37: ...Autorange Autozero Trigger Arm Count Trigger Arm Source Trigger Count Trigger Source OFF Source 1 0 Source V 1 0 Source I 10 REPEAT ON FIXED OFF FIXED OFF ON 1 Immediate 1 Immediate SENS FUNC CONC OFF SENS FUNC source_ function SENS VOLT NPLC 1 0 SENS VOLT RANG range SENS CURR NPLC 1 0 SENS CURR RANG range SENS AVER COUN 10 SENS AVER TCON REPeat SENS AVER STAT ON SOUR VOLT MODE FIXED SOUR VOLT RAN...

Страница 38: ...ion password by remote first send the present password and then send the new password For example the following command sequence changes the password from the KI002430 remote default to KI_CAL CAL PROT CODE KI002430 CAL PROT CODE KI_CAL You can use any combination of letters and numbers up to a maximum of eight characters NOTE If you change the first two characters of the password to something oth...

Страница 39: ...during comprehensive calibration the instrument will display an ap propriate error message see Appendix B The unit will then prompt you to repeat the calibra tion step that caused the error Remote error reporting You can detect errors while in remote by testing the state of EAV Error Available bit bit 2 in the status byte Use the STB query to request the status byte Query the instrument for the ty...

Страница 40: ... volts measurement function Model 2430 Digital Multimeter Input HI Input LO 2430 1KW PULSE SourceMeter 250V PEAK 5V PEAK HI LO OUTPUT 125V PEAK 125V PEAK EDIT TOGGLE POWER RANGE INPUT OUTPUT 4 WIRE SENSE DISPLAY ON OFF TERMINALS FRONT REAR AUTO RANGE EXIT ENTER CONFIG MENU SWEEP TRIG REL LOCAL FILTER LIMIT DIGITS SPEED V Ω MEAS I FCTN V I SOURCE 2 3 0 1 6 7 8 9 4 5 STORE RECALL EDIT Figure 2 1 Vol...

Страница 41: ...g Note that the display value adjustment limits are within 1 of the present range 12 After adjusting the display value to agree with the DMM reading press ENTER The unit will then display the following V CAL Press ENTER to Output 200 00mV 13 Press ENTER The Model 2430 will source 200mV and display the following DMM RDG 200 0000mV Use ß ƒ ENTER or EXIT 14 Note and record the DMM reading and then ad...

Страница 42: ...0mV 000 00mV 200 00mV 000 00mV ___________ mV ___________ mV ___________ mV ___________ mV 2V 2 0000V 0 0000V 2 0000V 0 0000V ___________ V ___________ V ___________ V ___________ V 20V 20 000V 00 000V 20 000V 00 000V ___________ V ___________ V ___________ V ___________ V 100V 100 00V 000 00V 100 00V 000 00V ___________ V ___________ V ___________ V ___________ V 1 Use EDIT and RANGE keys to sele...

Страница 43: ...ess ENTER The unit will display the following CALIBRATION UNLOCK EXECUTE VIEW DATES ß SAVE LOCK CHANGE PASSWORD 6 Select EXECUTE then press ENTER The instrument will display the following message I CAL Press ENTER to Output 10 000μA 7 Press ENTER The Model 2430 will source 10μA and simultaneously display the following DMM RDG 10 00000μA Use ß ƒ ENTER or EXIT 8 Note and record the DMM reading and t...

Страница 44: ...source 0μA and simultaneously display the follow ing DMM RDG 00 00000μA Use ß ƒ ENTER or EXIT 17 Note and record the DMM reading and then adjust the display to agree with the DMM reading Once again the maximum adjustment is within 1 of the present range 18 After adjusting the display to agree with the DMM reading press ENTER to complete calibration of the present range 19 Press EXIT to return to t...

Страница 45: ...INPUT OUTPUT 4 WIRE SENSE DISPLAY ON OFF TERMINALS FRONT REAR AUTO RANGE EXIT ENTER CONFIG MENU SWEEP TRIG REL LOCAL FILTER LIMIT DIGITS SPEED V Ω MEAS I FCTN V I SOURCE 2 3 0 1 6 7 8 9 4 5 STORE RECALL EDIT Model 2430 Input HI Input LO 1Ω Resistor Figure 2 3 3A range current calibration test connections Calibration 2 13 ...

Страница 46: ...000A 0 0000A 1 0000A 0 0000A ___________ A ___________ A ___________ A ___________ A 3A3 3 0000A 0 0000A 3 0000A 0 0000A ___________ A ___________ A ___________ A ___________ A 2 14 Calibration 1 Use EDIT and RANGE keys to select source range 2 Multimeter reading used in corresponding calibration step See procedure 3 Current calculated as follows I V R where V is the DMM reading and R is the chara...

Страница 47: ...MPLETE Press ENTER to confirm EXIT to abort 9 Press ENTER to save the calibration data or press EXIT to abort without saving cali bration data The following message will be displayed CALIBRATION SUCCESS Press ENTER or EXIT to continue 10 Press ENTER or EXIT to complete process Step 5 Lock out calibration 1 From normal display press MENU 2 Select CAL then press ENTER The Model 2430 will display the...

Страница 48: ...r active range 2 16 Calibration Calibration data will not be saved if 1 Calibration was not unlocked with CODE command 2 Invalid data exists For example cal step failed or was aborted 3 Incomplete number of cal steps were performed For example omitting a negative full scale step Ranges that calibrated successfully will be saved if calibration is unlocked Ranges that failed will not be saved Recomm...

Страница 49: ...e range First parameter negative full scale Second parameter negative zero Third parameter positive full scale Fourth parameter positive zero 0 2V 2V 20V 100V 10μA 100μA 1mA 10mA 100mA 1A 3A 0 18 to 0 22 1 8 to 2 2 18 to 22 90 to 110 9E 6 to 11E 6 90E 6 to 110E 6 0 9E 3 to 1 1E 3 9E 3 to 1E 3 90E 3 to 110E 3 0 9 to 1 1 2 7 to 3 15 0 002 to 0 002 0 02 to 0 02 0 2 to 0 2 1 to 1 1E 7 to 1E 7 1E 6 to ...

Страница 50: ...s sent the instrument will assume the operating states listed in Table 2 2 3 Perform the range calibration steps listed in Table 2 9 for all ranges For each range Send the SOUR VOLT RANG command to select the source and sense range being calibrated For example for the 2V range the following command would be sent SOUR VOLT RANG 2 Program the source to output the negative full range value using the ...

Страница 51: ...itialization commands Command Description RST Restore GPIB defaults SOUR FUNC VOLT Activate voltage source SENS CURR PROT 0 1 Current limit when voltage source is active SENS CURR RANG 0 1 Make sure 1A range is not active SOUR VOLT PROT MAX Maximum allowable source voltage SYST RSEN OFF Disable remote sensing CAL PROT CODE KI002430 Unlock cal OUTP STAT ON Turn source on Step 3 Current calibration ...

Страница 52: ... zero Calibration source function negative zero Establish positive full range polarity Read actual output value Calibrate sense function positive full scale Calibrate source function positive full scale Set output to 0V Read actual output value Calibrate source positive zero 1 Perform complete procedure for each range where Range 0 2 2 20 and 100 and Source_value 0 2 2 20 and 100 2 DMM_Reading par...

Страница 53: ... the SOUR CURR 0 0 command to set the source current to 0A Note and record the multimeter reading Send the CAL PROT SOUR command using the multimeter reading as the com mand parameter For example CAL PROT SOUR 1E 6 4 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 5 Repeat step 3 for the 3A range using the calculated curre...

Страница 54: ...on negative zero Calibration source function negative zero Establish positive full range polarity Read actual output value Calibrate sense function positive full scale Calibrate source function positive full scale Set output to 0A Read actual output value Calibrate source positive zero 2 22 Calibration 1 Perform complete procedure for each range where Range and Source_value 10E 6 100E 6 1E 3 10E 3...

Страница 55: ...ibration procedure CAL PROT LOCK Single range calibration Normally the complete calibration procedure should be performed to ensure that the entire instrument is properly calibrated In some instances however you may want to calibrate only certain ranges To do so complete the entire procedure only for the range s to be calibrated Keep in mind however that you must complete all parameter steps for e...

Страница 56: ...2 24 Calibration ...

Страница 57: ...3 Routine Maintenance ...

Страница 58: ...N U S A INPUT OUTPUT 250V PEAK 125V PEAK TRIGGER LINK 4 WIRE SENSE LO LINE RATING 100 240VAC 50 60HZ 250VA MAX RS232 IEEE 488 ENTER IEEE ADDRESS WITH FRONT PANEL MENU 125V PEAK 5V PEAK 5V PEAK 5V PK V Ω GUARD GUARD SENSE LINE FUSE SLOWBLOW 3 15A 250V OUTPUT ENABLE HI WARNING NO INTERNAL OPERATOR SERVICABLE PARTS SERVICE BY QUALIFIED PERSONNEL ONLY WARNING NO INTERNAL OPERATOR SERVICABLE PARTS SERV...

Страница 59: ...tinues 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 Blow 5 20mm FU 106 3 15 ...

Страница 60: ...3 4 Routine Maintenance ...

Страница 61: ...4 Troubleshooting ...

Страница 62: ...430 be sure to read the following considerations CAUTION The PC boards are built using surface mount techniques and require spe cialized equipment and skills for repair If you are not equipped and or qualified it is strongly recommended that you send the unit back to the fac tory for repairs or limit repairs to the PC board replacement level Without proper equipment and training you could damage a...

Страница 63: ...leased the message No keys pressed is displayed 5 Pressing EXIT tests the EXIT key However the second consecutive press of EXIT aborts the test and returns the instrument to the SELF TEST MENU Continue pressing EXIT to back out of the menu structure DISPLAY PATTERNS test The display test lets you verify that each pixel and annunciator in the vacuum fluorescent dis play is working properly Perform ...

Страница 64: ...ay the following menu FRONT PANEL TESTS KEYS DISPLAY PATTERNS CHAR SET 4 Select CHAR SET and press ENTER to start the character set test Press any key except EXIT to cycle through all displayable characters 5 When finished abort the character set test by pressing EXIT The instrument returns to the FRONT PANEL TESTS MENU Continue pressing EXIT to back out of the menu structure Principles of operati...

Страница 65: ... as well as associated interfacing circuits Power supplies converts the AC line voltage into DC voltages that supply the power for the digital and analog circuits and the output stage Analog Section Output A D Converter Guard Buffer Guard Display Keyboard Microcomputer Digital I O GPIB Interface RS 232 I O GPIB I O Digital Section To Analog Circuits To Output Stage To Digital Circuits 15V 5V 42V 1...

Страница 66: ...ystem to assure accu racy and provide a controllable signal for the output stage which provides the necessary voltage and current gain to drive the output Sense resistors in the HI output lead provide output current sensing and a separate sense resistor is used for each current range The 1A and 3A ranges use 0 2V full scale for a full range output while all other ranges use 2V output for full scal...

Страница 67: ...V 5V F 15V F F F Output Stage 150V 42V 42V 150V O Constant Frequency Low Noise Floating Switching Supply 24Vdc D Line Neutral 5Vdc D 12Vdc PFC DC DC Converter D Digital Circuits 24dc DC Regulators Figure 4 3 Power supply block diagram Output stage 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 ...

Страница 68: ...High current drive capability is provided by Q500 Q511 Coarse current limits are built into the output stage O F F Q518 Maindrive 300K Q521 Q523 Q525 Q507 42V 85V HI Drive Q503 F 85V Q504 Q514 42V HI Drive Q500 Q516 15Vf 15Vf Figure 4 4 Output stage simplified schematic ...

Страница 69: ...voltage drop in the guard leads since significant current can flow 50mA Digital circuitry Refer to Figure 4 5 for the following discussion on digital circuitry The core digital circuitry uses a Motorola 68332 microcontroller running at 16 78MHz The memory configuration includes two 256K 8 bit flash EEPROMs and two 128K 8 bit RAMs used in parallel to utilize the 16 bit data bus of the MPU The RAM i...

Страница 70: ...at controls the VFD vacuum fluorescent display and interprets key data The microcontroller has four peripheral I O ports that are used for the vari ous control and read functions Display data is serially transmitted to the microcontroller from the digital board via the TXB line to the microcontroller PD0 terminal In a similar manner key data is serially sent back to the digital board through the R...

Страница 71: ...ain microprocessor using proprietary encod ing schemes Troubleshooting Troubleshooting information for the various circuits is summarized below Display board checks If the front panel display tests indicate that there is a problem on the display board use Table 4 1 See Principles of operation for display circuit theory Table 4 1 Display board checks Step Item component Required condition Remarks 1...

Страница 72: ...cuit description Table 4 3 Digital circuitry checks Step Item component Required condition Remarks 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Power on test U3 pin 19 U3 pin 7 U3 pin 68 U3 lines A0 A19 U3 lines D0 D15 U3 pin 66 U4 pin 7 U4 pin 8 U13 pins 34 42 U13 pins 26 31 U13 pin 24 U13 pin 25 U3 pin 43 U3 pin 44 U3 pin 45 U3 pin 47 RAM OK ROM OK Digital common 5V Low on power up then goes high C...

Страница 73: ...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 The battery should be suspected if the instrument no longer retains buffer data or user defined operating parameters such as instrument setups source memo ry a...

Страница 74: ...reading buffer Initialize instrument setups 1 through 4 to present instrument settings Initialize all 100 source memory locations to present instrument settings Delete user math expressions No comm link error A No Comm Link error indicates that the front panel processor has stopped communicating with the main processor which is located on the digital board This error indicates that one of the main...

Страница 75: ...5 Disassembly ...

Страница 76: ...gloves Only handle PC boards by the edges and shields Do not touch any board traces or components not associated with repair Do not touch areas adjacent to electrical contacts Use dry nitrogen gas to clean dust off PC boards Solder repairs Observe the following precautions when you must solder a circuit board Use an OA based organic activated flux and take care not to spread the flux to other area...

Страница 77: ...ip solder irons Once the device is installed in the PC board it is normally adequately protected and you can handle the boards normally Assembly drawings 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 Assemb...

Страница 78: ...alog board shield remove the shield which is secured to the analog board by a single screw Analog board removal Perform the following steps to remove the analog board This procedure assumes that the case cover is already removed 1 Remove the small pulse board before removing the analog board 2 Disconnect the front and rear input terminals You must disconnect these input terminal connections for bo...

Страница 79: ...E When re installing the heat sink make sure that all clips are properly installed and centered on each pair of output transistors Digital board removal Perform the following steps to remove the digital board This procedure assumes that the an alog board assembly is already removed NOTE In order to remove the digital board the display board must first be removed 1 Remove IEEE 488 Digital I O and R...

Страница 80: ...until the bar separates from the casing Pull the display board from the front panel 4 Remove the switch pad by pulling it from the front panel Removing power components The following procedures to remove the power supply and or power module require that the case cover and motherboard be removed as previously explained Power module removal Perform the following steps to remove the rear panel power ...

Страница 81: ...ly made To en sure proper operation replace the analog signal wire ferrite noise filters and securely fasten the shield WARNING To ensure continued protection against electrical shock verify that power line ground green and yellow wire attached to the power module is con nected to the chassis Also make sure the two bottom case screws are properly installed to secure and ground the case cover to th...

Страница 82: ...5 8 Disassembly ...

Страница 83: ...6 Replaceable Parts ...

Страница 84: ...ts be sure to include the following information Instrument model number Model 2430 Instrument serial number Part description Component designation if applicable Keithley part number 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 serv...

Страница 85: ...P 0 01 5 50V NPO C 514 01 C250 251 272 297 298 299 300 524 525 542 CAP 0 1UF 10 25V CERAMIC C 495 1 C256 C257 CAP 22PF 10 100V CERAMIC C 451 22P C267 C268 C327 CAP 1000P 10 100V CERAMIC C 451 1000P C269 271 273 282 284 291 305 310 321 322 CAP 0 1UF 10 25V CERAMIC C 495 1 C283 CAP 100P 10 100V CERAMIC C 451 100P C296 C330 C400 CAP 270PF 2 5 630V POLYPROPYLENE C 405 270P C301 C302 CAP 1000PF 10 50V ...

Страница 86: ...10 500V CERAMIC C 497 01 C548 558 565 566 581 582 600 601 602 CAP 0 1UF 10 25V CERAMIC C 495 1 C549 561 564 585 CAP 0 1UF 10 25V CERAMIC C 495 1 C556 C557 C559 C560 C562 C563 C616 CAP 22UF 20 25V TANTALUM C 440 22 C583 C584 CAP 1000pF 20 50V CERAMIC C 418 1000P C605 606 607 613 614 617 618 619 620 621 CAP 0 1UF 10 25V CERAMIC C 495 1 C610 C612 CAP 2200P 10 100V CERAMIC C 430 2200P C622 623 624 625...

Страница 87: ...L501 CHOKE SHIELD BEAD CH 52 L600 601 602 FERRITE CHIP 600 OHM BLM32A07 CH 62 L603 FERRITE CHIP 600 OHM BLM32A07 CH 62 Q200 201 202 203 204 205 206 207 240 241 TRANS N CHANNEL JFET SNJ132199 TG 294 Q208 Q210 Q212 Q214 Q216 Q218 TRANS NPN CATV SILICON MPSH17 TG 221 Q209 Q211 Q213 Q215 Q217 Q219 TRANS CURR REG CDLL5313 TG 321 Q220 TRANS NPN SILICON MJE340 TG 209 Q221 TRANS PNP POWER MJE350 TG 210 Q2...

Страница 88: ...5 P CHANNEL POWER MOSFET TG 348 Q526 Q527 Q530 Q531 TRANS N CHANNEL MOSFET SI9410DY TG 302 Q532 Q536 TRANS N CHANNEL FET IRF630 TG 214 Q533 Q539 TRANS P CHANNEL 200V FET IRF9630 TG 215 Q535 537 538 600 TRANS NPN MMBT3904 TG 238 Q602 607 TRANS N MOSFET VN0605T TG 243 R117 128 133 136 141 144 RES 10K 5 250MW METAL FILM R 376 10K R129 155 211 224 229 234 237 244 247 281 RES 10K 1 100MW THICK FILM R 4...

Страница 89: ...00MW THICK FILM R 418 140K R261 262 265 266 311 312 313 314 315 316 RES 4 99K 1 100MW THICK FILM R 418 4 99K R272 273 347 348 511 512 RES 249K 1 100MW THICK FILM R 418 249K R280 RES 4 02K 1 100MW THICK FILM R 418 4 02K R282 284 286 288 301 438 439 592 617 622 RES 10K 1 100MW THICK FILM R 418 10K R283 287 297 299 349 350 351 352 457 461 RES 30 1K 1 100MW THICK FILM R 418 30 1K R289 R303 R681 R684 R...

Страница 90: ...361 362 365 369 418 419 420 421 456 458 RES 1K 1 100MW THICK FILM R 418 1K R363 THICK FILM TF 274 R368 RES 332 1 100MW THICK FILM R 418 332 R375 R376 R576 R578 RES 10 10 100MW THICK FILM R 418 10 R388 393 399 411 412 699 RES 357 1 100MW THICK FILM R 418 357 R422 RES 4 7K 5 250MW METAL FILM R 376 4 7K R426 429 601 603 605 608 626 702 703 RES 4 99K 1 100MW THICK FILM R 418 4 99K R435 504 590 673 688...

Страница 91: ...CK FILM R 418 2M R525 R526 RES 1 21K 1 100MW THICK FILM R 418 1 21K R530 R532 R534 R537 R559 R712 RES 1K 1 100MW THICK FILM R 418 1K R538 539 540 541 542 543 568 569 RES 0 5 5 1W METAL R 444 5 R553 R554 RES 75K 1 100MW THICK FILM R 418 75K R570 571 573 581 705 RES 249 1 100MW THICK FILM R 418 249 R572 574 580 582 RES 200K 1 100MW THICK FILM R 418 200K R575 R579 R614 R615 RES 2 21K 1 100MW THICK FI...

Страница 92: ...ES 42 7K 0 1 0 125W THIN FILM R 456 42 7K R683 R686 RES 7 32K 0 1 0 125MW THIN FILM R 456 7 32K R690 R694 RES 100K 5 250MW METAL FILM R 376 100K R710 RES 0 065 1 3W R 474 065 R717 R718 RES 10 5 250MW METAL FILM R 376 10 R719 RES 100 5 125MW METAL FILM R 375 100 R721 RES 2K 1 100MW THICK FILM R 418 2K RT200 POLYSWITCH PTC RESISTOR RT 17 RT500 THERMISTER PD 7MW DEG C 1500V 613 74K RT 8 TP200 215 218...

Страница 93: ...U659 IC 20V OP AMP LT1097S8 IC 767 U228 U263 IC OP AMP LOW NOISE LT1007CS8 IC 949 U236 U606 IC HI SPEED BIFET OP AMP AD711JR IC 894 U239 U266 IC QUAD 2 INPUT NAND 74HC00M IC 781 U240 IC POS NAND GATES INVERT 74HCT14 IC 656 U242 243 244 245 246 247 IC DUAL HIGH CMR SPEED OPTO HCPL 2631 IC 588 U252 U253 U254 U255 U256 IC 8 STAGE SHIFT CD74HC4094M IC 1026 U257 IC SUPPLY VOLT SUPERVISOR TL7705A IC 860...

Страница 94: ... DZ 113 VR202 203 407 408 409 506 507 DIODE ZENER 5 1V BZX84C5V1 DZ 88 VR214 VR215 DIODE ZENER 8 2V MMBZ5237 DZ 92 VR400 VR401 DIODE ZENER 4 7V 1N4732A DZ 67 VR410 514 515 601 604 DIODE ZENER 3 3V MMBZ5226BL DZ 94 VR500 VR501 VR502 VR503 DIODE ZENER 12V MMSZ12T1 DZ 112 VR509 VR510 DIODE ZENER 15V 1N4744A DZ 75 VR600 DIODE ZENER 6 4V 1N4579 DZ 73 VR602 VR603 DIODE ZENER 6 2V MMSZ6V2 DZ 97 VR605 VR6...

Страница 95: ... C123 CAP 0 1UF 20 50V CERAMIC C 418 1 C126 CAP 100P 10 100V CERAMIC C 451 100P C127 C128 C129 C130 C211 CAP 100P 10 100V CERAMIC C 451 100P C131 CAPACITOR C 570 470 C15 C37 C204 C205 C206 C207 C208 C209 CAP 0 01U 10 500V CERAMIC C 497 01 C19 C69 C75 C85 C92 C200 C201 CAP 0 1UF 10 25V CERAMIC C 495 1 C2 4 8 24 44 56 61 76 78 80 82 87 88 89 CAP 0 01UF 10 50V CERAMIC C 491 01 C202 CAP 47PF 10 100V C...

Страница 96: ...C95 C106 C112 C118 CAP 22UF 10 100 35V ELECTROLYTIC C 309 22 C97 CAP 1 30 250V FILM C 553 1 C99 CAP 01uF 20 50V CERAMIC C 418 01 CR13 CR200 DIODE DUAL HSM 2822T31 RF 95 CR5 14 15 22 24 32 33 DIODE DUAL SWITCHING BAV99L RF 82 CR1 4 35 37 38 39 47 RECTIFIER POWER ULTRAFAST RF 107 CR201 CR202 CR203 CR204 CR205 DIODE DUAL COMMON ANODE BAW56LT2 RF 98 CR36 CR43 CR44 CR45 CR46 DIODE ULTRAFAST MUR860 RF 6...

Страница 97: ...CS 724 3 PS1 POWER SUPPLY PS 54 2A Q1 Q3 Q4 Q5 Q6 Q200 Q201 Q202 TRANS N MOSFET VN0605T TG 243 Q10 TRANS NPN MMBT3904 TG 238 Q11 TRANS HEXFET POWER MOSFET TG 304 Q7 Q12 TRANSISTOR TG 382 Q13 TRANS N CHAN MOSFET 2SK1412 TG 276 Q14 TRANS PNP MMBT3906L TG 244 Q2 HEXFET POWER MOSFET TG 338 Q8 POWER MOSFET IRFIZ34G TG 313 Q9 TRANS TRIODE THYRISTOR MAC223A6 TG 172 R1 R37 R43 R44 R45 R65 RES 2 21K 1 100M...

Страница 98: ...HICK FILM R 418 6 04K R206 R210 RES 4 99K 1 100MW THICK FILM R 418 4 99K R208 R214 RES 2M 1 100MW THICK FILM R 418 2M R6 R213 RES 10K 1 100MW THICK FILM R 418 10K R22 RES 4 02K 1 100MW THICK FILM R 418 4 02K R25 R28 R49 RES 4 75K 1 100MW THICK FILM R 418 4 75K R3 RES 11K 1 100MW THICK FILM R 418 11K R30 R117 RES 100 1 100MW THICK FILM R 418 100 R33 R92 R95 RES 0 0499 1 100MW THICK FILM R 418 0499 ...

Страница 99: ...THICK FILM R 418 150K RT101 INRUSH CURRENT LIMITER RT 22 RT200 RT201 THERMISTER PD 7MW DEG C 1500V 613 74K RT 8 RV1 SUPPRESSOR TRANSIENT VOLTAGE JUNCTION VR 10 RV101 VARISTOR METAL OXIDE VR 7 SO1 SO2 SOCKET PLCC 032 T A SO 143 32 S1 SWITCH PUSHBUTTON 6 POLE SW 466 T1 TRANSFORMER TR 335A T2 TRANSFORMER TR 312A T3 TRANSFORMER TR 317A TP3 TP4 TP6 TP17 CONN TEST POINT CS 553 U10 U27 LARGE SCALE IC SMT...

Страница 100: ...6 IC VOLTAGE REGULATOR LM340 12 IC 60 U28 IC POWER VOLT REF LT1004CZ 2 5 IC 929 U3 MICROCONTROLLER MC68332 FC LSI 161 U4 IC 5V RS 232 TRANSCEIVER MAX202 IC 952 U5 IC OP AMP AD705JR IC 814 U6 IC OCTAL INTER BUS TRANS 75161 IC 647 U7 PROTECTED QUAD POWER DRIVERS IC 1212 U8 POWER FACTOR CONTROLLER IC 1113 U9 IC HEX INVERTERS 74HCT04 IC 880 VR1 DIODE ZENER 30V BZX84C30 DZ 106 30 VR2 DIODE ZENER REGULA...

Страница 101: ...01 VACUUM FLUORESCENT DISPLAY DD 51C J1033 CONN HEADER STRAIGHT SOLDER PIN CS 368 16 Q901 Q902 TRANS NPN GEN PURPOSE BC868 TG 293 R901 RES NET 15K 2 1 875W TF 219 15K R902 RES 13K 5 125MW METAL FILM R 375 13K R903 R904 RES 4 7K 5 250MW METAL FILM R 376 4 7K R905 RES 1M 5 125MW METAL FILM R 375 1M R906 RES 1K 5 250MW METAL FILM R 376 1K R907 RES 240 5 250MW METAL FILM R 376 240 R908 RES 10M 5 125MW...

Страница 102: ...AP 2200U 20 50V ALUM C 586 2200 J1 CONN MALE 3 PIN CS 612 1 J1029 HEADER CS 715 5 R1 R4 RESISTOR WIREWOUND R 257 100 R6 R7 R9 R10 RESISTOR WIREWOUND R 34 10 R2 R3 RESISTOR R 496 1K R11 R12 R13 R14 RES 100K 1 1 2W METAL FILM R 94 100K R5 R8 RES 7 15K 1 1 2W METAL FILM R 94 7 15K CR1 CR2 DIODE SILICON IN4148 RF 28 K1 K2 RELAY RL 218 6 20 Replaceable Parts ...

Страница 103: ...SSIS ASSEMBLY 2430 302A CHOKE CH 58 1A COVER 2420 317A DISPLAY LENS 2430 311A FAN FN 33 2 FOOT 428 319A FOOT EXTRUDED FE 22A FOOT RUBBER FE 6 HANDLE 428 329F HEAT SINK 2420 308B HOLDER FERRITE 2001 367A LED HIGH POWER PL 94 LENS LED 6517 309B LINE FILTER LF 11 MEMBRANE SWITCH FRONT PANEL 2430 313A MOUNTING EAR LEFT 428 338B MOUNTING EAR RIGHT 428 328E PC BOARD STOP 2001 371A POWER ROD 704 313A PAN...

Страница 104: ...6 22 Replaceable Parts ...

Страница 105: ...A Specifications Section A pgs 1 5 qxd 11 7 2005 1 35 PM Page 1 ...

Страница 106: ...n C MAX OUTPUT POWER 110W four quadrant source or sink operation DC mode 2 1100W four quadrant source or sink operation PULSE mode 3 SOURCE SINK LIMITS 1 05A 105V 3 15A 21V 10 5A 105V 2 5ms pulse CURRENT REGULATION L i n e 0 01 of range Load 0 01 of range 100pA VOLTAGE LIMIT Bipolar voltage limit compliance set with single value Min 0 1 of range OVERSHOOT 0 1 typical 1mA step RL 10kž 20V range Add...

Страница 107: ...peration regardless of load to 30 C Above 30 C and or power sink operation refer to the Power Equations section of the User s Manual For power line voltages less than 95V limit max current to 0 85A on 1A range and 2 5A on 3A range 3 10A range only in pulse mode Limited to 2 5ms pulse width maximum 8 duty cycle maximum Measure Specifications 1 2 7 Vo l tage Measurement Accuracy remote sense Max Inp...

Страница 108: ...V 1A ranges add 0 05 3A 10A range add 1 5mA For 0 01 PLC add 0 05 of range to offset specifications except 200mV 1A ranges add 0 5 3A 10A range add 15mA 2 Accuracies apply to 2 or 4 wire mode when properly zeroed 3 4 wire mode 4 Manual ohms mode only 5 Source readback enabled offset compensation ON 6 10A range only in pulse mode 7 In pulse mode limited to 0 1 PLC measurement System Speeds Measurem...

Страница 109: ...EEN INPUT OUTPUT AND SENSE TERMINALS 5v o l ts SOURCE MEASURE TERMINAL R ATING I n s tallation cetegory I MAX SENSE LEAD RESISTANCE 1Mž for rated accuracy SENSE INPUT IMPEDANCE 1010ž GUARD OFFSET VOLTAGE 500 V t y p i c a l SOURCE OUTPUT MODES Pulse Memory List mixed function Fixed DC level St air linear and log SOURCE MEMORY LIST 100 points max M E M O RY BUFFER 5 000 readings 5H d i g i ts two 2...

Страница 110: ...1 of range OVERSHOOT 0 1 typical full scale step resistive load 10mA range Current Programming Accuracy local or remote sense Accuracy 1 Year Noise Programming 23 C 5 C peak peak Range Resolution rdg amps 0 1Hz 10Hz 10 0000 A 500 pA 0 033 2 nA 50 pA 100 000 A 5 nA 0 031 20 nA 500 pA 1 00000m A 50 nA 0 034 200 nA 5 nA 10 0000m A 500 nA 0 045 2 A 50 nA 100 000m A 5 A 0 066 20 A 500 nA 1 00000 A2 50 ...

Страница 111: ...5 47 5 Always contact check failure 3 00 16 5 52 5 Additional Pulse Mode Source Specifications MAXIMUM DUTY CYCLE 8 hardware limited 10A range only All other ranges 84 MAXIMUM PULSE WIDTH 5ms from 90 rising to 90 falling edge 2 5ms 10A range MINIMUM PULSE WIDTH 150 s with 0 004 PLC measurement MINIMUM PULSE RESOLUTION 10 s typical 20 s max limited by system jitter SOURCE ACCURACY Determined by set...

Страница 112: ... 0000 100 100 m A 0 098 0 003 0 073 0 001 200 000 1 m 10 m A 0 077 0 03 0 053 0 01 2 00000 k 10 m 1 m A 0 066 0 3 0 045 0 1 20 0000 k 100 m 100 A 0 063 3 0 043 1 200 000 k 1 10 A 0 065 30 0 046 10 2 00000 M 10 10 A 0 068 100 0 049 50 20 0000 M 100 1 A 0 249 1 k 0 112 500 20 0000 M 4 1 k Source IACC Measure VACC Measure IACC Measure VACC TEMPERATURE COEFFICIENT 0 18 C 28 50 C 0 15 accuracy specific...

Страница 113: ... Origin To GPIB To GPIB To GPIB Fast 0 01 internal 256 256 83 83 83 83 Medium 0 10 internal 181 166 73 70 73 70 Normal 1 00 internal 49 42 35 31 34 30 COMPONENT 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 t7 Fast 0 01 external 1 01 ms 1 08 ms 0 5 ms 0 5 ms 5 3 ms 5 3 ms Medium 0 10 external 2 5 ms 2 9 ms 0 5 ms...

Страница 114: ...y backup 3 yr battery life PROGRAMMABILITY IEEE 488 SCPI 1996 0 RS 232 5 user definable power up states plus factory default and RST DIGITAL INTERFACE Safety Interlock Active low input Handler Interface St art of test end of test 3 category bits 5V 300mA supply D i g i ta lI O 1 t r i g g e r i n p u t 4 TTL Relay Drive outputs 33V 500mA sink diode clamped POWER SUPPLY 100V to 240V rms 50 60Hz 250...

Страница 115: ...V Thus the actual reading range is 10V 2 5mV or from 9 9975 to 10 0025V Current measurement calculations are performed in exactly the same manner using the perti nent specifications ranges and input signal values Source accuracy Source accuracy calculation is similar except of course that source specifications are used As an example of how to calculate the actual source output limits assume you ar...

Страница 116: ...A 12 Specifications ...

Страница 117: ...B Command Reference ...

Страница 118: ...ked changes password Default password KI002430 Query number of times 2430 has been calibrated Save calibration data to EEPROM Lock calibration inhibit SAVE command operation Request cal lock status 0 unlocked 1 locked Program calibration year month day Query calibration year month day Program calibration due year month day Query calibration due year month day Calibrate active measure range Query m...

Страница 119: ...once before performing calibration Do not send CODE before each calibration step To change the code first send the present code then send the new code The password parameter must be enclosed in single quotes If you change the first two characters of the password to something other than KI you will not be able to unlock calibration from the front panel Example CAL PROT CODE KI002430 Send default co...

Страница 120: ...eps except for LOCK Note Calibration will be only temporary unless the SAVE command is sent to permanently stored calibration constants Calibration data will not be saved if 1 calibration was not unlocked by sending the CODE command 2 in valid data exists for example cal step failed or was aborted or 3 an in complete number of cal steps were performed for example omitting a negative full scale ste...

Страница 121: ...e 2 select the range being calibrated and 3 send the CAL PROT SENS command for each parameter listed in 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 Paramete...

Страница 122: ...cal prot sour nrf Parameters See Table B 3 for recommended parameter ranges Description The CAL PROT SOUR command calibrates the Model 2430 source func tion To use this command you must 1 program the source to the correct value 2 select the range being calibrated and 3 send the CAL PROT SOUR command for each parameter listed in Table B 3 Note When the Model 2430 receives this command it will attem...

Страница 123: ...l scale Second parameter negative zero Third parameter positive full scale Fourth parameter positive zero 0 2V 2V 20V 100V 10μA 100μA 1mA 10mA 100mA 1A 3A 0 18 to 0 22 1 8 to 2 2 18 to 22 90 to 110 9E 6 to 11E 6 90E 6 to 110E 6 0 9E 3 to 1 1E 3 9E 3 to 11E 3 90E 3 to 110E 3 0 9 to 1 1 2 7 to 3 15 0 002 to 0 002 0 02 to 0 02 0 2 to 0 2 1 to 1 1E 7 to 1E 7 1E 6 to 1E 6 1E 5 to 1E 5 1E 4 to 1E 4 1E 3...

Страница 124: ...ring any calibration step the Model 2430 will generate an appropriate error message 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 These errors will occur u...

Страница 125: ... 505 Source offset data invalid 506 Source gain data invalid 507 Measurement offset data invalid 508 Measurement gain data invalid Status byte EAV Error Available bit Whenever an error is available in the error queue the EAV Error Available bit bit 2 of the status byte will be set Use the STB query to obtain the status byte then test bit 2 to see if it is set If the EAV bit is set an error has occ...

Страница 126: ...an also be used to detect the completion of each calibration step In order to use OPC to detect the end of each calibration step do the following 1 Enable operation complete by sending ESE 1 This command sets the OPC operation complete bit in the standard event enable register allowing operation complete status from the standard event status register to set the ESB event summary bit in the status ...

Страница 127: ... 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 Clear the SRQ by querying the ESR using the ESR query to clear OPC sta tus then request the status byte with the STB query Refer to your controller s documentation for information on detecting and servicing SRQs ...

Страница 128: ...B 12 Command Reference ...

Страница 129: ...C Calibration Programs ...

Страница 130: ...u will need the following computer software Microsoft QBasic supplied with MS DOS 5 0 or later MS DOS version 5 0 or later HP style Universal Language Driver CECHP EXE supplied with Keithley and CEC interface cards listed above Calibration equipment The following calibration equipment is required Hewlett Packard HP3458A Digital Multimeter 1Ω 0 1 100W resistor See Section 2 for detailed equipment s...

Страница 131: ...Be sure to change the OneOhm parameter to the characterized value of 1Ω resis tor See Section 2 for details 7 Check thoroughly for errors then save it using a convenient filename 8 Run the program and follow the prompts on the screen to perform calibration For test connections refer to the following figures in Section 2 DMM volts connections Figure 2 1 10μA to 1A range current connections Figure 2...

Страница 132: ...10 NDIG 7 TRIG LINE FUNC DCV AUTO OneOhm 1 Use characterized 1 ohm value CLS PRINT Model 2430 Calibration Program PRINT Connect DMM volts input to Model 2430 INPUT OUTPUT jacks GOSUB KeyCheck FOR J 1 TO 2 Select volts current cal IF J 1 THEN RESTORE VoltsInit Max 8 Range 2 Limit 100 ELSE RESTORE CurrentInit Max 4 Range 00001 Limit 3 PRINT 1 OUTPUT 24 OUTP STAT OFF PRINT 1 OUTPUT 22 FUNC DCI AUTO P...

Страница 133: ...OT DATE D LINE INPUT Enter calibration due date yyyy mm dd D PRINT 1 OUTPUT 24 CAL PROT NDUE D PRINT 1 OUTPUT 24 CAL PROT SAVE Save calibration constants GOSUB ErrCheck PRINT 1 OUTPUT 24 CAL PROT LOCK Lock out calibration PRINT Calibration completed PRINT 1 OUTPUT 24 RST PRINT 1 LOCAL 22 24 CLOSE END KeyCheck Check for key press routine WHILE INKEY WEND Flush keyboard buffer PRINT PRINT Press any ...

Страница 134: ...L 22 24 CLOSE END VoltsInit Calibration command lists DATA RST SOUR FUNC VOLT SENS CURR PROT 0 1 DATA SENS CURR RANG 0 1 SOUR VOLT PROT LEV MAX SYST RSEN OFF DATA CAL PROT CODE KI002430 OUTP STAT ON VoltsCal DATA SOUR VOLT RANG SOUR VOLT DATA CAL PROT SOUR CAL PROT SENS SOUR VOLT 0 0 DATA CAL PROT SOUR CAL PROT SENS SOUR VOLT CAL PROT SOUR DATA CAL PROT SENS SOUR VOLT 0 0 CAL PROT SOUR CurrentInit...

Страница 135: ... 24 SENS FUNC VOLT DC PRINT 1 OUTPUT 24 SOUR FUNC VOLT PRINT 1 OUTPUT 24 CAL PROT CODE KI002430 Unlock calibration Range 2 Initial range 200mV PRINT Model 2430 Voltage Calibration Constants PRINT DO Loop for all volts ranges PRINT 1 OUTPUT 24 SOUR VOLT 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 PRINT 1 ENTER 2...

Страница 136: ...ion 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 CLOSE END ...

Страница 137: ... drawings 5 3 B Battery replacement Precautions 4 13 Procedure 4 14 C Calibration Considerations 2 2 Cycle 2 3 Equipment 2 3 Errors 2 7 B 9 Parameters 2 16 Remote 2 15 Remote command summary 2 16 Remote calibration command summary B 2 Remote commands 2 15 Remote procedure 2 18 Remote error reporting 2 7 Test connections 2 11 2 13 Test equipment 1 3 Unlocked states 2 5 Verification equipment 1 3 Ca...

Страница 138: ...ng the error queue B 8 Status byte EAV Error Available bit B 9 Using the OPC query B 10 Using the OPC command B 10 F Factory service 6 2 Front panel Calibration 2 7 Current calibration 2 14 Disassembly 5 6 Error reporting 2 7 Tests 4 3 Voltage calibration 2 10 G General program instructions C 2 Generating an SRQ on calibration complete B 11 Generating an SRQ on error B 9 H Handling and cleaning 5 ...

Страница 139: ...ons 4 2 Requesting calibration constants C 7 Resetting the calibration password 2 6 Resistance Limits calculation 1 4 Measurement accuracy 1 14 Restoring factory defaults 1 5 S Setting the measurement range 1 6 Setting the source range and output value 1 6 Single range calibration 2 23 Software requirements C 2 Solder repairs 5 2 Source accuracy A 2 Static sensitive devices 5 3 Status byte EAV Err...

Страница 140: ......

Страница 141: ...o zero q Unstable q Overload q Will not read applied input q Calibration only q Certificate of calibration required q Data required attach any additional sheets as necessary Show a block diagram of your measurement including all instruments connected whether power is turned on or not Also describe signal source Where is the measurement being performed factory controlled laboratory out of doors etc...

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