Keithley 193A Скачать руководство пользователя страница 123

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Содержание 193A

Страница 1: ...c i a n sw i t ho v e r 1 5 0y e a r so f s p e c i a l i z a t i o n 9 0d a yw a r r a n t y 5d a yr i g h t o f r e t u r no na l l e q u i p me n t 1 3y e a r w a r r a n t i e sf o r n e wa n d p...

Страница 2: ...Instruction Manual Model 193A System DMM 01985 Keithley Instruments Inc Instrument Division Cleveland Ohio U S A Document Number 193A 901 01...

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Страница 4: ...If any defects are found replxe wt test leads that have the same measure of safety as those supplied with the instrument For optimum safety do not touch the test leads or the instrument while power i...

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Страница 6: ...G RESOLUTION t rdg counts 1 Year 18 28 c RANGE 5 Digits 6 5 20Hz 50Hz 50Hz IOkHz IOkHz 20kHz ZOkHz 100kHz 2 2 19999 1Ir 10pv 1 100 0 25 I 10 11 35 300 I f so0 2ov 21 9999 10 Lv 100 flv 1 100 0 25 100...

Страница 7: ...FICIENT LUTION rdg counts LUTION rdg counts t rdg counts i C RANGE 15 Dieits RANGE 5 Digits 18 28 C 18 28 C 0 00 18T 280 SOT 200 pA InA 0 09 10 0 01 0 5 OVERLOAD PROTECTION 2A fuse 25OV externally acc...

Страница 8: ...autoranging ISOLATION Input LO to IEEE LO or power line ground 500V max 5xlOSV Hz greater than 10 paralleled by 400pF DATA MEMORY I to 500 locations progrumwble Measurement intervals selectablr lms to...

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Страница 10: ...ault Conditions 2 I User Programmed Conditions 2 2 FRONT PANEL FAMILIARIZATION 2 2 DisplayandIndicators 2 2 Controls 2 2 Input Terminals 2 4 Current Fuse 2 4 REAR PANEL FAMILIARIZATION 2 3 Connectors...

Страница 11: ...10 ii INTRODUCTION 3 l BUS DESCRIPTION 3 l IEEE 488 BUS LINES 3 2 Data Lines 3 2 Bus Management Lines 3 2 Handshake Lines 3 2 BUS COMMANDS 3 3 Uniline Commands 3 4 Universal Commands 3 4 AddressedComm...

Страница 12: ...play D 3 W Reference Junction 0 3 35 Exponential Filter N 3 36 FRONT PANEL MESSAGES 3 36 Bus Error 3 36 Trigger Overrun Error 3 37 BUS DATA TRANSMISSION TIMES 3 37 TRANSLATOR SOFTWARE 3 37 Translator...

Страница 13: ...nditions 6 3 6 6 3 Warm Up Period 6 3 6 6 4 Calibration Switch 6 5 6 6 5 Front Panel Calibration 6 5 6 6 6 IEEE 488 Bus Calibration 6 6 6 6 7 Calibration Sequence 6 7 6 68 DC Volts Calibration 6 7 6 6...

Страница 14: ...Configuration ZOV 1OOOV Ranges 6 S 6 4 Four Wire Resistance Configuration 200 20kO Ranges 6 Y 6 5 Two Wire Resistance Calibration Configuration 200k0 ZOOM0 Ranges 6 9 6 6 Flowchart of AC Volts Calibr...

Страница 15: ...Drawing Dwg No 193 100 7 5 Digital Board Schematic Diagram Dwg No 193 106 7 6 Analog Board Component Location Drawing Dwg No 193 120 7 7 Analog Board Schematic Diagram Dwg No 193 126 7 8 Model 1 930 C...

Страница 16: ...ipment 4 2 Limits for DC Volts Verification 4 3 Limits for TRMS AC Volts Verification 4 4 Limits for Ohms Verification 4 5 Limits for DC Current Verification 4 6 Limits for AC Current Verification 4 7...

Страница 17: ...5 Display Circuitry Checks 6 29 7 l Display Board Parts List 7 2 Digital Board Parts List 7 3 Analog Board Parts List 7 4 Model 1930 Parts List 7 5 Model 1931 Parts List 7 6 Model 193A Mechanical Part...

Страница 18: ...be digitally calibrated from either the front panel or over the bus l User Programmable Default Conditions Any instrument measurement configuration can be established as the power up default condition...

Страница 19: ...ance with its stated specifications l Section 5 contains a description of operating theory Analog digital power supply and IEEE 488 interface operation is included 1 2 l Section 6 contains information...

Страница 20: ...executed when the pressed ENTER button causes the instrument to exit the program mode 5 A pro ram can be exited at an time and thus not ex ecute 1 by pressing the RESEif button Paragraph 2 8 provides...

Страница 21: ...d Cables The Model 7007con nects the Model lY3A to the IEEE 488 bus using shielded cables to reduce electromagnetic interference EMI The Model 7007 l is one meter in length and has a EMI shield ed IEE...

Страница 22: ...internally selected line voltage is marked on the rear panel near the AC power receptacle Ranges are 105Vl25V or ZloV 250V 50160Hz AC If the line voltage setting of the instrument needs to be changed...

Страница 23: ...the in strument Depressing and releasing the switch once turns the power on Depressing and releasing the switch a se cond time turns the power off The correct positions for on and off are marked on t...

Страница 24: ...V o tion installed VAC DC measurements can be made ith both the ACV and current option installed AAC DC measurements can be made See paragraph 2 6 12 for AC DC measurements The secondary functions of...

Страница 25: ...four wire RTD temperature measurements 2 3 4 Current Fuse The current fuse protects the Model 1931 from input cur rent overloads The instrument can handle UD to 2A con LOCAL When the instrument is in...

Страница 26: ...ERROR AND WARNING DISPLAY MESSAGES Calibration of the Model 193A can only be done if the calibration switch is in the unlock position Table 2 3 lists and explains the various display messages associa...

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Страница 28: ...OPERATION CONTROL 0 Figure 2 1 Model 193A Front Panel Figure 2 2 Model 193A Rear Panel 2 112 8...

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Страница 30: ...Energize the circuit using the installed conncct disconnect device and make measurements without disconnecting the DMM 5 De energize the circuit using the installed connect disconnect device 6 Disconn...

Страница 31: ...to the input of the Model 193A the display will read O OOOOOOV When 2 2OOOOOVis con nected to the input the display will read 4 4COOOOV Thus the d 9 to 0 namic measurement range of the instrument is 4...

Страница 32: ...display the overrange message under these conditions new reading AVG t I When the ZERO button is pressed to enable zero the A G t G t 1 zero indicator light will blink until an on scale reading F is a...

Страница 33: ...ndicator is only used with the front oanel digital filter 2 Internal filtering does not occur on ranges and functions not listed in Table 24 3 Controlling the internal filter on off over the IEEE bus...

Страница 34: ...e for the displayed noise use digital filtering and then zero out the settled offset Shielding AC voltages which are extremely large com pared with the DC signal may erroneously produce a DC output Th...

Страница 35: ...acy is degraded ac cording to the following calculation AD CF 3 x 0 36 Where AD is accuracy degradation CF is the crest factor Also the peak signal must be less than 5 x full scale but not more than t...

Страница 36: ...ing the OHMS button 2 Select a range consistent with the expected resistance or use autorange 3 Select the front or rear panel input terminals using the INPUT switch NOTE The 2OOnrange requires zero t...

Страница 37: ...rrent or AC current function by pressing the DCA or ACA button respectively With the Model 1931 Current option installed the Model 2 Select a range consistent with the expected current or use 193A can...

Страница 38: ...nts using thermocouple TC sensors Selection of the various TC modes can only be accomplished over the IEEE 488 bus See paragraph 3 1022 for more information 2 6 10 dB Measurements The dB measurement m...

Страница 39: ...he displayed mnemonics that are associated with dB measurements dBV dB voltage measurement mode with the dB reference at 1v dB dB voltage measurement mode dBA dB current measurement mode Unlike dBV th...

Страница 40: ...asure a 1OOmVRMS lkHz source Typically the Model 193A will read 17 79dBm 2 The calculated dBm level for that s urce is 17 18dBm 2 6 12 TRMS AC DC Measurements 3 The 0 61dB error is considerably better...

Страница 41: ...te AC measurements for a wide variety of AC input waveforms TRMS Measurement Comparison The RMS value of a pure sine wave is equal to 0 707 times its peak value The average value of such a waveform is...

Страница 42: ...re wave the crest factor is unity The crest factor of other waveforms will of course depend on the waveform in question because the ratio of peak to RMS value will vary For example the crest factor of...

Страница 43: ...will result in a short period error when the storage process is started 2 7 1 Storing Data Perform the following procedure to store data 1 Press the DATA STORE button The current storage interval in...

Страница 44: ...nstrument on the 1OOWDC range at 6 d resolution the following prompt will be displayed V C selected connect the trigger source to the EXTER NAL TRIGGER INPUT connector on the rear panel of the instrum...

Страница 45: ...n The following message will be displayed briefly HI The highest stored reading along with the memory location of that reading will be displayed B To display the lowest reading stored enter the number...

Страница 46: ...pt will be displayed PROGRAM 7 2 Press the TEMP button The current alpha value will then be displayed If the instrument is currently set to the fac tory default alpha value the following message will...

Страница 47: ...the zero value A complete explanation of the zero modifier can be found in paragraph 2 6 2 Once a zero value is set on a measurement function that zero level is the same on all the ranges For example...

Страница 48: ...ent filter value on power up change the filter value using Program FILTER followed by Program 90 to save it see paragraph 2 8 9 2 Entering a filter value of 00 will default the filter value back to th...

Страница 49: ...000WDC 2 5000WDC 14 45OOWAC ll OOOOOk0 3 Enter the number 90 by pressin the 9 and 0 but tons The following message WI 1 be dlsplayed briefly B PROGRAM SAVE 4 The following message will then be display...

Страница 50: ...PRGM button The following prompt will be displayed PROGRAM 2 Enter the number 92 by pressing the Y and 2 buttons The current line frequency setting will then be displayed If the instrument is current...

Страница 51: ...zeroical defeated increases measurement speed and is useful for making high impedance DC voltage measure ments which can be affected by the input multiplexing Per form the following steps to run this...

Страница 52: ...can be used to control the fill rate in the data store mode with the data store enabled and one shot mode selected each trigger will cause a reading to be stored 2 The Model 193A must be in the approp...

Страница 53: ...the Model 193A with the Model 705 proceed as follows 1 Connect the Model 193A to the Model 705 as shown in Figure 2 11 Use shielded cables with BNC connectors The Model 193A VOLTMETER COMPLETE OUTPUT...

Страница 54: ...OPERATION 1 I I I J 1 Figure 2 11 External Triggering Example 2 3312 34...

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Страница 56: ...sends data while a listener receives data Depending on the type of instrument any particular device can br a talker only a listener only or both a talker and a listener There are two categories of con...

Страница 57: ...scribed in paragraph 3 4 1 ATN Attention The ATN line is one of the more impor tant management lines in that the state of this line deter mines how information on the data bus is to be interpreted IFC...

Страница 58: ...outines that display messages in case the transfer sequence stops for any reason Once all NDAC and NRFD are properly set the source sets DAV low indicating to accepting devices that the byte on the da...

Страница 59: ...he com mand is transmitted As with all multiline commands these commands are transmitted with ATN true LLCI Local Lockout LLQ is sent to the instrument to lock out its front panel controls DCL Device...

Страница 60: ...has another group of commands called the Second r Command Group SCG These are listed in Figure 3 3 tar informational purposes only the Model 193A does ot have secondary addressing capabilities 3 4 4 U...

Страница 61: ...IEEE 488 PROGRAMMING Figure 3 3 Command Groups 3 6...

Страница 62: ...Addressed Command Sequence Also the primary address must be programmed the cor rect value as described in the following paragraphs Assumes primary address 10 ata Her 3F 2A 04 BUS Decimal t h3 42 4 3...

Страница 63: ...tric threads as identified by dark colored screws Earlier versions had different screws which are silver colored Do not attempt to use these ty e of connectors with the Model 193A which is designed or...

Страница 64: ...overtighten them 3 Add additional connectors from other instruments as required IContact Number IEEE 488 Deaignatiw_ 4 Make sure the other end of the cable is properly con nected to the controller So...

Страница 65: ...lities will be discussed 3 8 1 Controller Handler Software Before a specific controller can be used over the IEEE 488 bus it must have IEEE488 handler software installed With some controllers the soft...

Страница 66: ...which are part of the IEEE 488 1978 standards define an instrument s ability to Table 3 7 Model 193A Interface Function Codes support various interface functions and should not be con fused with progr...

Страница 67: ...DRESSED COMMAND GROUP GET GROUP EXECUTE TRIGGER GTL GO To LOCAL SDC SELEaIVE DEVICE CLEAR STATUS COMMAND GROUP After the END LINE key is pressed the Model 193A will RQS REQUEST SERVICE be in the remot...

Страница 68: ...P 85 F EIIOTE 7 1 I Now send GTL with the following statement After the END LINE key is pressed the REMOTE and TALK lights will turn off indicating that the instrument has LI Ic AL 7 10 gone into the...

Страница 69: ...nstrument Now enter the following statement into the HI 85 keyboard in remote and enable the correct trigger mode for this demonstration When the END LINE key is pressed the instrument returns to the...

Страница 70: ...that ATN is false when the commands are transmitted A number of commands may be grouped together in one string A command string is usually terminated with an ASCII X character which tells the instrume...

Страница 71: ...rue 2 Address the Model 193A to listen 3 Set ATN false 4 Send the command string over the bus one byte at a time A m t 1scase contains the ASCII characters representing h the command string NOTE REN m...

Страница 72: ...n temperature value Calibrate first point using value V Calibrate second point using value V Restore factory default conditions Store present machine states as default conditions Reading with prefixes...

Страница 73: ...G Table 3 11 Device Dependent Command Summary Cont Send machine status word Send error conditions Send translator words Send buffer size average reading in buffer lowest reading in buffer highest read...

Страница 74: ...will be ready to take a reaf mg once the front end is set up The function may be programmed by sending one of the following commands FO DC Volts Fl AC Volts F2 Ohms F3 DC Current F4 AC Current F5 Temp...

Страница 75: ...7 ut signal becoming the zero baseline level The baseline WI 1 be stored in Program ZERO The 22 command is used when a zero value using the V command has already been established When the 22 com mand...

Страница 76: ...adings in a one shot trigger mode a separate trigger stimulus is re quired to start each conversion The Model 193A has eight trigger commands as follows Ttl Continuous On Talk ll One shot On Talk T2 C...

Страница 77: ...n the QCITI mode one reading will be stored each time the instrument is addressed to talk In the QlJI3 mode each GET command will cause one reading to be stored In the QOT5 mode each instrument execut...

Страница 78: ...The V command is also used to program a zero value see paragraph 3 10 4 and to set the reference junction tenl perature needed to make thermocouple TC measurements see paragraph 3 10 22 The value com...

Страница 79: ...ble 3 10 The in strument will then power up to these default conditions The current IEEE address and line frequency setting of the instrument are not affected by the LO command The Ll command is used...

Страница 80: ...Mask M and Status Byte Format The SRQ command controls which of a number of condi tions within the Model 193A will cause the instrument to request service from the conroller by asserting SRQ Once an...

Страница 81: ...IEEE 488 PROGRAMMING OEGC c DEGF F 1 I 1 L B MODE ONLY J J Figure 3 9 General Data Format Figure 3 10 SRQ Mask and Status Byte Format 3 26...

Страница 82: ...ed with the Ul com mand as explained in paragraph 3 10 16 An explanation of each error can also be found in paragraph 3 10 16 Bit 6 SRQ Provides a means to determine if SRQ was asserted by the Model 1...

Страница 83: ...ands previously received The hold off period depends on the commands being pro cessed Table 3 15 lists hold off times for a number of dif ferent commands Since a NRFD hold off is employed the handshak...

Страница 84: ...r correspond to the programmed numeric values For example if the instrument is present ly in the R3 range the second R byte in the status Ward will correspond to an ASCII 3 The returned terminator cha...

Страница 85: ...IEEE 488 PROGRAMMING Figure 3 11 UO Status Word and Default Values 3 30...

Страница 86: ...NSERR ZO Translator error Set when LIST is used in a Translator definition TRANSERR Zl Translator error Set when FORGET is us ed in a Translator definition TRANSERR 23 Translator error Set when SAVE i...

Страница 87: ...nd U4 command Get data condition Display data condi tion Send U5 command Get data condition Display data condi tion Send U6 command Get data condition Display data condi tion Send U7 command Get data...

Страница 88: ...a delay of 30 05sec send X30050X For a delay of 60 send W6OOOOX Upon power up or after receiving a DCL or SDC com mand the instrument will return to the default condition HP 85 Programming Example To...

Страница 89: ...CA function HOX Selects the DCV function Spaces in the command string as shown in the following examples are ignored HP 65 Programming Example Enter the following statements into the computer to place...

Страница 90: ...junction measurements should be made at 30sec intervals due to possible reference junc tion temperature drift caused by ambient tempera ture variations Perform the following 1 rocedure to make thermo...

Страница 91: ...ted with IEEE 488 programming These messages are intended to inform you of certain conditions that oc cur when sending device dependent commands to the instrument The following paragraphs describe the...

Страница 92: ...in place of Keithley s defined device dependent commands One word can replace a single com mand or a string of commands Fur example the word ACV can be sent in place of Fl and the word SETUP1 can be...

Страница 93: ...THINKTHISlSTHlRTYTWOC ARACT ERS FlX ALIAS XRAY FlX ALIAS SETUP FlX ALIAS SETUP RlX ALIAS 5200 FlX 41 1 iLlAS DOG FIX LIST ALIAS DOG FlX FORGET ALIAS DOG FIX SAVE Notes 1 Trying to define a Translator...

Страница 94: ...device dependent commands The re served word ALIAS automatically places the instrument in the NEW mode NEW is also used to combine Translator words and is explained in paragraph 3 l3 4 OLD is a reserv...

Страница 95: ...is the new Translator word SETUP1 and SETUP2 are the existing words PlZlX is the Keithley IEEE command string NEW tells the instrument that SETUP1 and SETUP2 are Translator words When the Translator w...

Страница 96: ...The most recent defined word will be listed first Notes 1 The U2 command can also be used to list the Translator words see paragraph 3 10 16 2 If there are no Translator words in memory nothing will...

Страница 97: ...is held off until the command is executed Model 8573A and National Instruments GPIB PC Cards From BASIC the CR LF sequence can be added to the Translator execution string as in the example below 100...

Страница 98: ...at less than 80 relative humidity 4 5 VERIFICATION PROCEDURES The following paragraphs contain procedures for verifying the 1 year accuracy specifications of the instrument at 5 2 di DP it resolution...

Страница 99: ...ts listed in the table CAUTION Do not exceed 1OOOV between the inout HI and LO terminals or damage to the instriment may occur 7 Repeat the procedure for each of the ranges with neeative voltaees Tabl...

Страница 100: ...at the procedure for the 2OV 200V and 7OOVranges by applying the respective AC voltages listed in Tahlr 1 3 Check to see that the readine for each ranze is within ment damage may occur the limits list...

Страница 101: ...rator to the Model 193A as shown in Figure 4 4 3 Set the calibrator to the SHORT position and enable zero on the Model 193A Verify that the display reads 000 000 4 Set the calibrator to output 190n an...

Страница 102: ...shown in Figure 4 6 5 digit resolution verify the DC current function as 3 Set the calibration source to output 2OO u md verii follows that the reading is within the limits listed in lhble 4 j 4 Repe...

Страница 103: ...e calibration source to output 2OOfi at a fre uen 4 cy of 45Hz and verify that the reading is within the nmts listed in Table 4 6 4 Repeat the 2OOfi measurement at the other frequencies specified in T...

Страница 104: ...nd verify that the reading is within the limits listed in Table 4 y 5 Repeat ste the 0 0039s 4 using the other resistance values listed for alpha value 6 Using front panel Program TEMP select the alte...

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Страница 106: ...ng for DC volts is performed by resistor divider network R181 The following attenuation of the in put signal is provided Divided by 10 on the 20V range Divided by 100 on the 2oOV range Divided by 1000...

Страница 107: ...ence resistor and the unknown resistance Since this current is common to both resistances the value of the unknown resistance can be calculated by measuring the voltage across the reference resistor a...

Страница 108: ...THEORY OF OPERATION r 1 L 2 I I Figure 5 2 Input Configuration During 2 and 4 Terminal Resistance Mesurement Gain Table 5 1 Ranging Information 5 3...

Страница 109: ...onnection a second set of leads R2 and R3 are connected to the unknown resistance The amount of current through R2 and R3 is much smaller than the current through Rl and R4 Thus the voltage seen by th...

Страница 110: ...THEORY OF OPERATION Figure 5 4 Resistance Measurement Simplified Circuitry 5 5...

Страница 111: ...rough Q141 Dur ing the signal phase signal high is selected through Q134 Q142 or Q 43 During the zero phase the multiplexer selects signal common through 4140 or Ql38 Resistance Measurements During th...

Страница 112: ...THEORY OF OPERATION Figure 5 6 Multiplexer Phases 5 7...

Страница 113: ...he signal to settle after the appropriate multiplexer FET is turned on Once the in put is enabled the signal from the buffer amplifier is add ed to the level shift current applied through R162 or R163...

Страница 114: ...THEORY OF OPERATION Figure 5 7 A D Converter Simplified Schematlc 5 9...

Страница 115: ...cted by the decoders The decoders are U303 U307 and U304 Only one device ROM RAM VIA etc will have access to the data bus at any one time The battery or capacitor back up circuitry turns on when power...

Страница 116: ...itch See Table 6 l for the correct position 3 Install a power line fuse consistent with the line voltage See paragraph 6 3 1 for the fuse replacement procedure CAUTION The correct fuse type must be us...

Страница 117: ...momentarily approx one minute read 2 2A before the fuse will blow This 10 overrange will not harm the instrument I I 2 Plug the Model 1930 into its mating receptacle on the analog board as shown in F...

Страница 118: ...ncy setting of the instrument 6 6 CALIBRATION Calibration should be performed every 12 months or if the performance verification procedures in Section 4 show that the Model 193A is out of specificatio...

Страница 119: ...MAINTENANCE Figure 6 1 Models 1930 and 1931 Installation 6 4...

Страница 120: ...20MR 32 ppm 200MR 225 ppm 200 2A ranges 0 025 C The default calibration point which is the normal full range reading for the selected range and func tion will now be displayed For example if the 2VDC...

Страница 121: ...instrument 4 Send the required calibration value receded by the V command letter and followed by the e 0 cahbratmn com mand For example to calibrate the 200VDC range at the ZOOVcalibration point send...

Страница 122: ...ront panel calibration omit step 4 of the follow ing procedure For IEEE 488 bus calibration omit E The instrument will exit the calibration program lnd step 3 return to the 200mVDC range E Re DF eat t...

Страница 123: ...ion and the 2OOQrange 2 Connect the resistance calibrator to the instrument as shown in Figure 6 4 3 For front panel calibration enter Program 96 as ex f oll0ws lained in paragraph 6 6 5 step 3 and pr...

Страница 124: ...mmands over the bus V19OXCOX C Set the resistance calibrator to SHORT On calibrator to settle send the following command over the bus VOXClX Both calibration constants will be automatically stored in...

Страница 125: ...TE If the 2VDC range is way out of calibration the messaye NO OPTION may be disulaved when the A V function is selected To rdsolve the problem 1 Calibrate the 2VDC range 2 Cycle power on the instrumen...

Страница 126: ...at 500Hz B After allowing sufficient time for the calibrator voltage to settle press the ENTER button The following message will be displayed for several seconds CALIBRATING C With the 0 2OOOOOVAC cal...

Страница 127: ...eed to step 8 I Repeat steps C through H until no other adjustments F Set the AC calibrator to output lO OOOOVat 1OOkHz need to be made and allow the measurement to settle J Turn the Model 193A off di...

Страница 128: ...ADC calibration point displayed on the Model 193A set the current calibrator to out put 200 000 A B After allowing sufficient time for the measurement to settle press the ENTER button The following me...

Страница 129: ...e 200 0000pA AC calibration point displayed on the Model 193A set the current calibrator to out put 200 000pA at a frequency of 1kHz B After waiting sufficient time for the measurement to settle press...

Страница 130: ...and any test leads from the instrument before disassembly 1 Remove the top cover as follows A The top cover is secured to the chassis of the Model 193A by two screws located at the rear of the instru...

Страница 131: ...out of the instrument 5 Remove the display board as follows A Remove each of the four decorative strips from the side panels as follows 1 Place a thin blade screwdriver into one of the holes where the...

Страница 132: ...MAINTENANCE i Figure 6 I 1 Connectors 6 17 6 16...

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Страница 134: ...MAINTENANCE 2 7 DECORbTlVE STRIP 14 Figure 6 12 Model 193A Exploded View 6 19 G20...

Страница 135: ...vice is installed on the PC board it is nor mally adequately protected and normal handling can resume 6 9 TROUBLESHOOTING The troubleshooting information contained in this section is intended for use...

Страница 136: ...ses a digital self test will then be per formed on the RAM circuitry If the RAM test fails the instrument will lock up with the following error message displayed AAAAAAAAAAAAAA Replacing U3l3 may reso...

Страница 137: ...g displayed as follows N 01 The instrument is still on the same function and range as it was before Program 93 was run 3 Using Table 6 12 reference the N mode to the current function and range to dete...

Страница 138: ...04 01 02 03 04 i 03 04 03 04 ii ii 01 ii 04 Inpul Multiplex Buffe FFTS Gain 0 x10 x10 Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl 0 Q141 Q140 Q134 Q140 Q141 Q134 TjE Q140 Q...

Страница 139: ...Xl Xl Xl Q142 Q140 Q141 Ql25 QL S QWQn4 QWQU4 QI25 Ql T Ql25 Ql S QWQ134 QI25 QI Y Ql25 QI X QI25 QEP Q125 Ql35 1 1 I I I I 1 L t I I I I I I T I 3 Range R p FET SOn On K105 K107 K105 KW7 K105 KlCV lO...

Страница 140: ...4 01 02 03 04 01 02 03 04 01 02 03 04 01 02 Input Buffer Gain Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl Xl X x10 x10 Xl Xl IMultiple PET S Oil Q142 Q140 Q141 Q142 Q140 4141 4142 4140 4141 4142 Q140 Q141...

Страница 141: ...43 CAL 03 Xl CALZERO 04 Xl SIG 01 x10 Q143 SIG ZERO 02 x10 Q140 CAL 03 Xl 4141 CALZERO 04 Xl Q140 SIG 01 x10 SIG ZERO x10 CAL i Xl CALZERO 04 Xl 4143 Q140 Q141 Q140 R p OXl 1930Relay K401 1931 1930 En...

Страница 142: ...very lmsec VIA clock TTL level pulses every 15msec Data 4 U310 pin 6 PA4 Switch data 5V or OV 5 U310 pin 7 IX5 Data input to VIA Switch data 5V or OV 6 U310 pin 8 PA6 Data input to VIA Switch data 5V...

Страница 143: ...4 5 lmsec negative going pulse every 6 10 11 and 12 10msec 5 JlOl8 pin 24 Sl Depress 5410 5412 5414 5416 or 5418 button Pulse present when button pressed 6 JlOZ3 pin 22 52 Depress 5411 5413 5415 5417...

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Страница 145: ...an order or to obtain information concerning replacement parts contact your Keithley representative or the factory See inside front cover for addresses When ordering include the following information...

Страница 146: ...esistor Thick Film Resistor Thick Film Resistor Thick Film Resistor Thick Film Switch Pushbutton Darlington Transistor Array ULN2003A Hex Inverter Open Collector Output CD40l2AE E Bit Serial In Parall...

Страница 147: ...REPLACEABLE PARTS I Figure 7 1 Jumper Board Component Location Drawing Dwg No 193 160 l 3...

Страница 148: ...REPLACEABLEPARTS Figure 7 2 Display Board Component Location Drawing Dwg No 193 110 7 4...

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Страница 150: ...0 1 F 50V Capacitor 0 1 F 50V Capacitor 0 1 F 5OV Capacitor 0 1 F 5OV Ceramic Disc Capacitor 0 1 F 50V Capacitor 0 1 F 50V Capac tor O LF 50V iii C 365 1 C 365 I l E4 i c 237 1 l A5 C 64 15p c314 c31...

Страница 151: ...lk0 l ZW Composition l A6 R 88 261k Not Used Not Used R3l5 I7316 FE kE R317 EE Resistor 4700 5 qW Composition l C6 R 76 470 Resistor lk0 5 aW Composition l D6 R 76 lk Resistor 2 4k0 5 hW Composition l...

Страница 152: ...8 UV Erasable PROM 2764 GI IB Ada ter 9914A Octal GPI I Transceiver 75160A C MOS Tri State Flip Flop MM74HCI374 Dual 4 Bit Decade and Bmary Counter 74LS393 Quad 2 Input NAND Gate Microorocessor Biool...

Страница 153: ...REPLACEABLE PARTS 6 Figure 7 4 Digital Board Component Location Drawing Dwg No 193 100 7 10...

Страница 154: ..._ _ l _ I c a I...

Страница 155: ...t t t...

Страница 156: ...ic Disc 047 F lOOV Metalized Polypropyl Capacitor O lb F 50V Capacitor 0 1 F 50V I Capacitor l F SW Ceramic Film Capacitor 0 1 F 50V Capacitor 1 F 5OV Ceramic Film Cavacmx lU I SW Cauacitor 0 1 F 50V...

Страница 157: ...nector 1 2 sev 193 326 kEi Connector Male l B5 CS 463 Connector Male l D5 CS 463 El Connector Male l E5 CS 463 Connector Male l E5 CS 338 18 f 1031 Connector Male 1032 Connector Male g KlOl Relay 5V l...

Страница 158: ...JFET Selected l G4 193 603 Transistor N Channel JFET Selected l F5 193 603 gj Transistor N Channel Transistor N Channel f FET PF5301 l F6 TG I39 FET PF5301 l G6 TG 139 Not Used Not Used Transistor NPN...

Страница 159: ...5 a Resistor 7 8hfL 1 Resistor lOk0 5 Resistor 20kfL 1 X bosition Yo W Comp osition nposition ILW Composition mposition W Composition W Composition W Composition 6 qW Composition W Composition I 1 W C...

Страница 160: ...Not Used Not Used Resistor 36Ofi 5 XW Composition Resistor 3604 5 XW Corn osition Matched component set R15 B R156 R21 Switch Front Rear Switch Front Rear Transformer Test Point Connector Pins vgltag...

Страница 161: ...C193 S nchronous Binary U Down Counter 74HC193 Tgi iieer flected Cg4053DC u129 18 Flog 74HC74 In ti Igh peed Op Amp MP5501CP uI30 ul31 u132 Triple 2Xhannel Analog Multiplexer CD4053BC ul33 Op Amp MP55...

Страница 162: ......

Страница 163: ...REPLACEABLE PARTS Figure 7 6 Analog Board Component Location Drawing Dwg No 193 120 7 22...

Страница 164: ...REPLACEABLE PARTS c I t t Figure 7 7 Analog Board Schematic Diagram Dwg No 193 126 sheet 1 of 4 23 7 24...

Страница 165: ...h E I F IL I I u t Figure 7 7 Analog Board Schematic Diagram Dwg No 193 126 sheet 2 of 4 7 2517 26...

Страница 166: ...REPLACEABLE PARTS Figure 7 7 Analog Board Schematic Diagram Dwg No 193 126 sheet 3 of 4 7 2717 28...

Страница 167: ...t f 0...

Страница 168: ...l qW Metal Film Resistor lk0 l hW Metal Film Resistor 2M62 0 5 1W Metal Film Resistor Pot 1000 10 3 4W Resistor Pot lkQ lo YaW Resistor Pot 10kQ 10 3hW Resistor Resistor Resistor Resistor Resistor Re...

Страница 169: ...or 2 2kR 5 XW Composition Resistor 499n 1 ZW Corn osition Resistor 56 2lh 0 5 W getal Film Resistor 56 2kd 0 5 WlMetal Film Resistor 44 2k0 l XW Composition Resistor lOOk0 5 aW Composition Resistor 16...

Страница 170: ......

Страница 171: ...REPLACEABLE PARTS Figure 7 8 Model 1930 Component Location Drawing Dwg No 1930 100 7 34...

Страница 172: ...REPLACEABLEPARTS Figure 7 9 Model 1930 Schematic Diagram Dwg No 1930 106 7 3517 36...

Страница 173: ......

Страница 174: ...pin Connector Female lug Connector Female lug Connector Female lug Resistor 0 10 O l ZSW Wirewound Resistor 0 8984 O l 5W Wirewound Resistor 9fl Resistor 904 O l W Metal Film Resistor 9004 O l X W Met...

Страница 175: ...REPLACEABLE PARTS ij k 5 I I 1 Figure 7 10 Model 1931 Component Location Drawing Dwg No 1931 100 7 38...

Страница 176: ...REPLACEABLE PAWS Figure 7 11 Model 1931 Schematic Diagram Dwg No 1931 106...

Страница 177: ......

Страница 178: ...228 317 6 7 Pushbuttons Control and Local I 228 317 7 Pushbutton Power i 29465 3 29465 2 4 228 318 1 lay Board Rear Panel Assem ly i 19W305 i BNC Connectors IS 249 Mountin Rails 228 319 i Fuse Ho ders...

Страница 179: ......

Страница 180: ...sages 2 6 Z 7 3 41 3 42 Execute X 3 18 3 20 Factory Default Conditions 2 1 3 15 Filter 2 11 Z 22 2 26 3 18 3 22 Front Panel Detailed Description 2 2 2 4 Calibration 6 5 Data Format G 3 19 3 27 3 28 Da...

Страница 181: ...6 19 7 41 Safety Precautions Preceding Set 1 2 7 Safety Symbols and Terms 1 l Schematic Diagrams 8 l Selective Device Clear SDC 3 15 Self Test 3 20 3 37 Serial Poll SPE SPD 3 16 Service Information se...

Страница 182: ...bles Display or output circle one norifts nUnable to zero q Unstable q Will not read applied input q Overload 7Calibration only q Data required UC of C required attachany additional sheetsasnecessary...

Страница 183: ......

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Содержание 193A

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Keithley 193A, Инструкция по эксплуатации, Страница: 123 / 183

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Содержание 193A

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