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Содержание 7071

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

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

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

Страница 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...

Страница 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...

Страница 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...

Страница 72: ......

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

Страница 74: ...L...

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Страница 76: ...I J 1 t 1 3 n...

Страница 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...

Страница 78: ......

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

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