Keithley 7071 Instruction Manual Download

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Summary of Contents for 7071

Page 1: ...Model 7071 General Purpose Matrix Card Instruction Manual Contains Operating and Servicing Information Publication Date June 1991 Document Number 7071 901 01 Rev D...

Page 2: ...ty also does not apply to fuses software non rechargeable batteries damage from battery leak age or problems arising from normal wear or failure to follow instructions THIS WARRANTY IS IN LIEU OF ALL...

Page 3: ...Instruction Manual Model 7071 General Purpose Matrix Card 01984 Keithley Instruments Inc Instruments Division Cleveland Ohio U S A Document Number 7071 901 01...

Page 4: ...present A good safety practice is to expect that hazardous voltage is present in any unknown circuit before measuring Users of this product most be protected from electric shock at all times The respo...

Page 5: ...ly before performing the indicated procedure The CAUTION heading in a manual explains hazards that could damage the instrument Such damage may invalidate the warranty Instrumentation and accessories s...

Page 6: ...stitute ANSI states that a shock hazard exists when voltage levels greater than 30V Rh4Sor 42 4V peak are present A good safety practice is to expect that hazardous voltage is present in any unknown c...

Page 7: ...um between any 2 pins or chassis CONTACT LIFE Cold Switching 10 closures At M mum Sigrul Level 10 closures PATH RESISTANCE per conductor 0 50 initial 1 5ll at end of contact life CONTACT POTENTIAL 5pV...

Page 8: ...ns and matrix expansion SECTION 2 Operation I Gives two typical applications for the Model 7071 in cluding thick film resistor network testing and tran sistor testing SECTION 3 Applications Contains p...

Page 9: ...uarding Sensing CONNECTION METHODS Connection Methods Using Mass Terminated Cable Model 7U78MTC Direct Connection Method Connection Method Using Connector Kit Model 7078 KIT MATRIXEXI ANSION Narrow Ma...

Page 10: ...Offset Current Tests 45 Contact Potential Tests 4 7 Path Isolation Tests 49 DtierenhaI and Common Mode Isolation Tests 411 PRINCIPLESOF OPERATION 413 Card Identification 4 W switching circuitry 414 P...

Page 11: ...078 MTC Wire Identification Z 12 2 4 Narrow Matrix Expansion Z 18 2 5 Wide Matrix Expansion 2 19 SECTION 4 Service Information 41 Verification Equipment 44 42 Path Isolation Tests 4 10 4 3 Differentia...

Page 12: ...18 Wide Matrix Example 16 x 24 2 20 2 19 Partial Matrix Expansion 16 x 24 2 21 2 20 Single Card System Example 2 22 2 21 MultipleCard SystemExample 2 23 2 23 Plug Contact Assignments 2 25 2 22 Multipl...

Page 13: ...ssary information 1 4 MANUAL ADDENDA Any improvements or changes concerning the matrix card or manual will be explained in an addendum included with the unit Be sure to note these changes and incor po...

Page 14: ...ck the unit in its original packing car ton or the equivalent and include the following information l Advise as to the warranty status of the matrix card l Write ATTENTION REPAIR DEPARTMENT on the shi...

Page 15: ...sembly CS 570 3 Quick Disconnect Terminal Block This cable assembly is the sames as the Model Three terminal block accomodating up to 16 AWG wires 707 m 5 except that it is 20 feet 6 meters in length...

Page 16: ...e of the Model 707 backplane row jumpers on matrix configurations is also covered here 2 7 Typical Connection Schemes Provides examples of ex temal connections for single card multiple card and multip...

Page 17: ...frame Failum to properly secure this ground connection may result in petsonal injury or death due to elec tric shock NOTE If using the terminal blocks leave enough slack in the external cabling so tha...

Page 18: ...OPERATION MOUNTING SCREWS Figure 2 l Matrix Card Installation 2 3...

Page 19: ...OPERATION Top hail of Cable Clamp Figure 2 2 Cable Clamp Assembly 2 4...

Page 20: ...OPERATION I Column I I lI 1 1 2 2 3 3 4 4 5 5 6 6 7 7 6 6 9 9 10 10 11 11 12 12 I I A A I B B c I D I 1 I E Row Row I E F F I G I G H H L L Figure 2 3 Simplified Schematic of Model 7071 2 s...

Page 21: ...matrix card can be configured shown in Figure 2 5 The advantage of using this configura to use instruments that have sensing capability The main tion is that the terminals of the source or measure ins...

Page 22: ...OPERATION Figure 2 5 Differential Switching Example Shielded 1 Columns SdElY Shield Figure 2 5 Driven Guard Example Shielded 2 7...

Page 23: ...ble both plugs intact makes it most convenient to connect the matrix card to a test fixture that uses a rack and panel receptacle Direct Connection Method This method makes connec tions at the quick d...

Page 24: ...Perform the following steps to wire a rack and panel receptacle 1 Remove 118 of insulation from the wires that are to be connected to the receptacle 2 Using the Model 7U7SHcT crimping tool connect a w...

Page 25: ...o install remove wire crimp tails into from rack and panel plugs and receptacles Used to connect wire crimp tails to W18to U26 gage wire Contains one rack and panel plug housing and 40 wire crimp tail...

Page 26: ...OPERATION Rack and Panel Receptacles see Table 2 2 for Model number Figure 2 8 Connections Uslng two Model 7078 MTC Cables 2 11...

Page 27: ...Table 2 3 Model 7078 MTC Wire Identification l H High L Low G Guard Receptacle Figure 2 9 Connecting Plug to Receptacle 242...

Page 28: ...OPERATION Figure 2 10 Receptacle Contact Assignments 2 B...

Page 29: ...OPERATION Model 7078 MTC Cable Cut in half Figure 2 11 Connections Using One Model 7078 MTC Cable Cut in Half 2 14...

Page 30: ...dentification at the receptacles is provided in Figure 2 10 2 Using a screwdriver connect the circuitry to the terminal blocks Figure 2 12 shows how a triaxial cable may be connected The screw termina...

Page 31: ...plug 4 Insulate the bare guard wire of each bundle so that they do not short out to each other The insulation must be 10 Tighten the hvo cable clamp screws on the housing able to withstand a 2OLWpote...

Page 32: ...OPERATION Larg Xameter Keying Plug Viewed from Cable side Figure 2 14 Connecting Beldon 9734 Cable to Plug Large Diameter Keying Pin elden 9734 Cable Figure 2 15 Cable Positions 2 v...

Page 33: ...he Model 7U7will result in an 8 x 36 matrix Figure 2 16 shows three matrix cards installed in slots 1 2 and 6 Model 7071 matrix cards installed in slots 1 2 and 3 of the Model 7CVcan be electricaIly i...

Page 34: ...cable or by using individual wires from the COLUMN terminal blocks of one card to the COLUMN terminal blocks of another Column connections to DUTs can be made at the COG UMN terminal blocks or at a C...

Page 35: ...certain devices For ex ample a source in Figure 2 19cannot be connected to DIJT X2 with one accidental crosspoint closure Three specific cmsspoints must be closed in order to connect a source to DUT X...

Page 36: ...in systeiw where path resistance is critical cables should be kept as short as possible 2 7 1 Single Card System Figure 2 20 shows how external connections for a single card system might by made Instr...

Page 37: ...3 Multiple Mainframe System Figure 2 22 shows a system using eight matrix cards re quiring two Model 7TJ7s daisy chained together In this con figuration all instrumentation and DUTs are connected to...

Page 38: ...OPERATION 0 0 0 I I Figure 2 21 Multiple Card System Example 2 23...

Page 39: ...OPERATION Figure 2 22 Multiple Mainframe Example 2 24...

Page 40: ...OPERATION Figure 2 23 Plug Contact Assignments 2 25 z 26...

Page 41: ...e resistor the matrix card in test systems network and the values of the resistors 3 2 THICK FILM RESISTOR NETWORK TESTING The system shown in Figure 3 l tests three 3 element thick films but can be e...

Page 42: ...d OHMS SENSE L4l are connected to pensated ohms feature of the Model 196 To compensate another matrix row The third pole G of the matrix is not for thermal EMFs close two crosspoints such as Al and sh...

Page 43: ...accuracy needed in the measurement The input im pedances of the Model 196 are as follows 3OOmVand 3V ranges lGfl 30V range UMQ 300V range lO lMfl For better input impedance requirements the Keithley M...

Page 44: ...APPLICATIONS Thick Film I 7 2 3 I m _ H LH LH LH L 4 Model 7071 Two poles used Model 230 Rl Rz R3 230 Equivalent Circuit Figure 3 3 Voltage Divider Checks 3 4...

Page 45: ...unt network and measuring the voltage drop across each resistor element and or across combined resistor elements In Figure 3 4 crosspoints El and F4 are closed to source current through the shunt and...

Page 46: ...APPLICATIONS Thick Film r Model 228 Source I Model 7071 Two poles used H 22s Equivalent Circuit Figure 3 4 Current Shunt Checks 3 6...

Page 47: ...onfigure the amplifier circuit In this circuit gain collector circuit and used to measure emitter current and is cz cuIated by dividing collector nt measured by the base to emitter voltage Notice that...

Page 48: ...APPLICATIONS Measure VWl 196 I IE L Gain r h Equivalent Circuit Model 230 I Model 7071 Two poles used Model 224 Figure 3 6 Transistor Current Gain Checks 3 8...

Page 49: ...APPLICATIONS Oi BO p i I I L l H i i j I I I t I 0 1 2 3 4 5 ve vans Figure 3 7 Common Emitter Characteristics of an NPN Silicon Transistor 3 9...

Page 50: ...APPLICATIONS SOWX V Model 230 Model 224 Figure 3 8 lhnsistor I Measurements 3 10...

Page 51: ...APPLICATIONS 224 Vorl Source V I HD Amps LO f I Output I H F I I I Common IL I1 II I1 II Model 230 I Model 7071 Two poles used Source I Model 224 Figure 3 9 Transistor VBE Measurements 3 11...

Page 52: ...ton gloves If making solder repairs on the circuit board use a flux that is rosin RMA based Remove the flux from these areas when the repair is complete Use Freon TMS or TE or the equivalent along wi...

Page 53: ...ections modify the procedures accordingly Connec tion techniques to rack and panel receptacles are covered in Section 2 The perfomumce verification procedures must be per formed with only one matrix c...

Page 54: ...HMS SENSE input 6 Short the four test leads together and zero the Model 196 Leave zero enabled for the entire test 7 Connect OHMS HI and OHMS SENSE HI of the Model 196 to the common terminal jumper It...

Page 55: ...196 3ooo 0 01 Keithley 617 lOpA lOOpA 1 6 1OOVsource 0 2 Electrometer w voltage source Triax cable unterminated Offset current isolation Keithley 181 2mV 0 015 Contact potential Keithley RI25 Offset c...

Page 56: ...he test leads through the cable clamp of the matrix card and push the card all the way into the mainframe Tighten the two spring loaded screws to completely mate the card with the backplane 7 Turn on...

Page 57: ...SERVICE INFORMATION I _ __ Model 7071 Figure 4 3 Differential Oftset Current Testing 4 6...

Page 58: ...t the terminal block to the matrix card at this time 4 Place the matrix card in slot 1 of the Model 707 but do not slide it all the way into the mainframe 5 Connect the pre wired terminal block to ROW...

Page 59: ...down to ROW B and repeat the basic procedure in steps 6 through 11to check apss 14 Repeat the basic procedure in steps I2 and 1 3for the points 81 through BlZ remaining rows ROWS C through H L _ Mode...

Page 60: ...minal blocks to ROWS A and B of the matrix card 7 Feed the test leads through the cable clamp of the matrix card and push the card all the way into the mainframe Tighten the two spring loaded screws t...

Page 61: ...Row E co1 5 Row D and Row E D4 and E5 5 Row E co1 5 to Row F co1 6 Row E and Row F E5 and F6 6 Row F co16 to Row G co1 7 Row F and Row G F6 and G7 7 Row G co1 7 to Row H co1 8 Row G and Row H G7 and H...

Page 62: ...rd 8 Feed the test leads through the cable clamp of the matrix card and push the card all the way into the mainframe lighten the two spring loaded screws to completely mate the card with the backplane...

Page 63: ...SERVICE INFORMATION 1 L Model 7071 Figure 4 7 Differential isolation Testing 4 12...

Page 64: ...t knows which type of mahix card is installed in that particular mainframe slot This enables the Model 707 to send valid configuration data to the matrix card On power up control line CARDSEL goes low...

Page 65: ...of the RC network charges a STROBE signal will then force the output of the NAND gate low allowing configured relays to energize 4 6 SPECIAL HANDLING OF STATIC SENSITIVE DEVICES CMOS and other high i...

Page 66: ...jumper wire must be connected as Table 4 4 shown in order to prmrlde circuit protection horn Recommended Troubleshooting Equipment static discharge Description Application DMh4 Keithley 196 Dual trace...

Page 67: ...SERVICEINFORMATION Figure 4 10 Receptacle Contact ldentlflcatlon 416...

Page 68: ...SERVICE INFORMATION Figure 4 11 Rear Shield 4 v...

Page 69: ...or addresses When ordering parts be sure to include the following information 1 Matrix card model number 7071 2 Card serial number 3 Part description 4 Circuit description if applicable 5 Keithley par...

Page 70: ...OR FILM RES 1OK 5 1 4W COMPOSITION OR FILM RES 120K 5 1 4W COMPOSITION OR FILM RES l lK 5 1 4W COMPOSlTlON OR FILM RES 910 5 1NW COMPOSITION OR FILM RES 200 5 1 4W COMPOSlTlON OR FILM TPl TPlO CONN TE...

Page 71: ...THLEY PART NO 2 2 2 2 2 2 1 1 1 1 8 UPPER CLAM ASSEMBLY UPPER CLAMP RUBBER STRIP 7071 30s 7071 307 I LOWER CLAMP ASSEMBLY LOWER CLAMP RUBBER STRIF 7071 306 7071 307 l HANDLE HH 33 1 CONNECI OR STRIP C...

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Page 73: ...Figure 6 2 Model 7071 Schematic Diagram Dwg No 7071 106 sheet 1 of 4...

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Page 76: ...I J 1 t 1 3 n...

Page 77: ...check one LIDlifts 0 Unable to zero 0 Unstable 0 Will not read applied input 0 Overload cl Calibration only 0 Data required 0 Certificate of calibration required attach any additional sheets asnecess...

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Page 79: ...Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 Printed in the U S A...

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