Keithley 615 Instruction Manual Download

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Summary of Contents for 615

Page 2: ...ACCURACY 5 of reading 3 2 digits on all ranges Drift due ta offset c rrent does not exceed 5 x lO I coulambs secpnd GENERAL DISPLAY 4 digits from 0000 to 1999 on 0 1 1 0 and 10 0 sensftlwty settings from 0000 to 999 on the 100 0 sensi tivity setting POLARfTV SELECTION OVERLOAD INDICATION Auto matic OVERRANGING lOO overrangingon all ranges exceptwhen Sing Se sltl lty setting of 100 0 DISPLAY RATE 2...

Page 3: ...volts on most ranges without damage b Time stability is better than 1 millivolt day after l hour warmup Less than 150 microvolts per C zero drift with temperature C Offset current less than 5 x 1O L5 amperes min imizes zero offset with high source resistance d A front panel ZERO CHECK Switch permits check ing zero offset without disturbing the tneasurement CiX iC e Operarion up to lOO voles above ...

Page 4: ...input low Indicates polarity of input signal Indicates magnitude of input signal 2 l 2 3 2 3 TABLE 3 Control COARSEZERO Switch Model 615 Rear Panel Controls end Terminals Figure 2 Functional Description Provides extended adfustment cepabflity of the front panel ZERO Control Psr 2 2 1 MA OuTPuT Receptacle PRINTER CONTROL CO eCtOC Connect i analog output to monitoring device 50 pin connector for BCI...

Page 5: ...LAY ZERO FEEDBACK LD INPUI Switch PATE CONTROL Switch S1204 BINDING RECEPTACLE S102 CONTROL R1222 POST 51209 R1201 51202 FIGURE 1 Model 615 Front Panel Controls and Terminals 1 VOLT ODTPW 9102 Transistor Transformer COARSEZERO switcn S1205 Xl ouepur 51203 FIGURE 2 Model 615 Rear Panel Controls and Terminals 0570 3 ...

Page 6: ...ill reduce accuracy se a law noise type cable which employs a graphite coating between the dielectric and the surrounding shield braid f Any change in the capacitance of the measuring circuit to ground will cause disturbances in the read ing especially on the more sensitive ranges fake the measuring setup a s rigid as possible and tie down connecting cables to prevent their movement If a continuou...

Page 7: ...rift or zero offset after long periods of storage or after an over load This my be corrected with the zero controls although drifting may continue for several hours NOTE If the Model 615 has been stared for a long time the offset current may exceed the specification when first used but should decrease to below the specified amo nt after one or two hours of se This is an inherent characteristic of ...

Page 8: ...GESwitch setting times the digital readout display e DISPLAY RATE Control This control is a con tinuously variable control that permits the user to select the rate of analog to digital conversion That is the control determines the number of times a new reading will be recomputed per unit of time Thts is useful for sampling a continuously varying in pllt current as well as for controlling slower ex...

Page 9: ...ement 4 Adjusr the SENSITIVITY Switch c unrercL ckwie e LO increase the Model 615 sensitivity Readjust rhe ZERO control as necessary after each change in sen sitivity 5 The voltage measured is indicated directly 0 the digital display with the decimal poinr automat ically indicated The poiarity is auLomatical y indicated corresponding CO Lhe potential of the Electr merer input high with respect to ...

Page 10: ... 10 S ampere range a self contained resistor is connected between the electrometer amplifier in put and output in the feedback loop This method permits faster response speed since the effect of input capacitance is minimized The input volcsge drop is reduced to less than 100 microvolts on any range Refer to Table 7 for typical Response and Noise performance for various values of input capac itance...

Page 11: ...TIVITY switch setting which permits the use of the smallest value range resistor The range cesis t r value is equivalent to the reciprocal of the RANGE Switch settine The input voltane drop across ehe shunt resistor Is indicated directly on the EiectromeLer digital display NOTE the smallest input drop possible to minimize voltage coefficient errors d Fast mde Current Weasurements for current be lo...

Page 12: ...he short ing link between LO and CASE GND Terminals on the rear panel Connect the Model 615 case securely to earth ground for maximum operator safety Operate the Alec trometer 8s described in Paragraphs 2 4 or 2 5 c Fast Mode Measurements Disconnect the shorting link between LO and CASE CND Terminals on the rear panel Connect the Model 615 case securely eo earth ground for maximum operator safety ...

Page 13: ...HMS SENSITI ICY SWFtch Fully Counterclock wise FEEDBACK Switch FAST 3 connect the unknown resistance between the Electrometer input high and GUARDTerminal as for Fast Mode Voltage Measurements 4 Lock the ZERO CHECK Button to make a mea SuremenL 5 the unknown rcsisrance is determined by multi plying the digital display times the RANGEswitch setting 6 The low terminal of the INPUT Receptacle is now ...

Page 14: ...er Volt meter es a Current Integrating or Charge Meas ring I sCr ment 12 b Set the front panel controls as follows ZERO CHECK Button KANCE Switch SENSITIVITY Switch LOCK 10 7 COULOMBS Fully Counterclock wise FEEDS 4CK switch FAST c Connect the Electrometer to the current eource to be measured as described in Paragraph 2 5 d Unlock the ZERO CHECK Sutton to make B measure ment Adjust the SENSITIVITY...

Page 15: ...ibed in Paragraph 2 4 d for normal Mode voltage measuremeots 3 Output buffer cards available from Keithley as Model 4401 Printer Output Cards may be ordered factory installed or ordered at a later date for user installation since no soldering or rewiring is required These Output Cards are available with other codes Standard Code is l 2 4 8 on a CIISC I design basis 4 Accessories b Connect an ccura...

Page 16: ...33 8 x 103 Overload 9 1 x 100 Range 34 4x 100 10 2 x 100 Range Range 35 8 x 100 Range 11 1 x 101 Range COlllUlO f i I 13 1 x 100 m arity 38 COUXllO ___ 14 ___ T Y 3 t 15 1 x 100 2 x 100 sensitivity 40 common _ 16 Se Siti ity 41 COllllllO __ 17 t15v __ 42 15v 18 3 6V 43 cammon ___ 19 Blank ___ 44 Grounded Hold i l 20 Blank _ _ 45 Grounded old 2 e 21 Blank 46 Grounded 22 Blank Trigger ___ 47 Blank I...

Page 17: ...e full scale magni tude for the del 615 is indicated by three front panel Numerical Readout indicamr lights with cor responding RCD outputs as show in Table 10 TABLE 10 3 1 x 101 O l 4 2 x 101 2 3 28 4 x 101 4 5x6 7 29 8 x 101 8 9 5 1 x 102 0 1 6 2 x 102 2 3 30 4 Y 102 4 5 6 7 31 8 x 102 829 2 Overrange Indication The fourth from the right Numerical Readout Indicatar represmts the overrange or m s...

Page 18: ...timum system performance it is often desirable to operate the Model 615 synchron sly with other digital equipment such a8 printers paper tape punches computers and other data handling devices The Model 615 with 4401 Printer Cards in stalled provides several printer control commands for the purpose of synchronizing external equipment to schieva maximum conversion rates I Maximum VOltaRe aed Current...

Page 19: ...nd time The maximum conver sion rate uslng an external trigger is 24 read ings per second b Conversion Cycle Timing The Conversion Cycle is composed of three timing periods namely Integrator Zero Integrator Sampling and A D mounting period Refer fo Timing Diagram Figure 9 P 1 integrator Zero Period ZERO When a trigger pulse initiates a new conversion cycle the Integrator circuit is zeroed for e pe...

Page 20: ... changed by removing the fuse holder cap on the rear panel Refer to Table 3 for proper type of fuse require Z 12 50 HZ LINE POWERFREQUENCYOPERATION The Model 615 is shipped for use with 60 Hz line power frequency unless ordered for 50 Hz operation The Model 615 will operate at either 50 or 60 Hz but line frequency noise reJection will be degraded Field conversion from 60 Hz eo 50 Hz is not recomme...

Page 21: ... 3 2 ELECTF omTER A 4PLIFIER OeEP ATION a The Model 615 electrometer amplifier employs matched insulated gate field effect transistor8 fol lowed by a transis or differential amplifier with a high voltage complementary output stage Refer to Figure 10 which shows a block diagram of the Electrom eter b The Electrometer amplifier is connected as a unity gain voltage to current converter configura tion...

Page 22: ...network represented by resistor Rs to provide full scale input ranges from 100 millivolts to 100 Olts in four steps The output voltage to current conve rsio is determined as follows sq 4 g The analog output signal for recorder outputs is derived from a resistor divider network represented by resistor RD in Figure 10 1 1 VOLT OUTPUT 51207 This output is derived from the 1 milliampere current for fu...

Page 23: ... RI212 is con nected across the amplifier feedback Loop as shown in Figure 12 The unity gain output Xl is connected to Input LO In this mode the GUARDand X1 Terminals may be used for monitoring purposes The Fast Mode con ciguration minimizes the slowing effects Of input ca pacitance The input voltage drop is maintained at less than 100 micravalcs sistore are R1202 through F 1212 c Normal Mode Oper...

Page 24: ...CIRCUIT DESCRIPTION 1VOLT OUTPUT C I GUARD INPUT I I RO I I I 0 0 vo Y m FIGURE 14 Coulombmeter Fast Made 22 0470 ...

Page 25: ...MODEL 615 CIRCUIT DESCRIPTION I I I I I I I I II 1 I I I I I I I I FIGURE 15 Block Diagram ot AID Converter 0671 23 ...

Page 26: ... time between A ta D conversions when the front panel DISPLAY RATE Con trol is Bet to any position other charI MAX me clock is stopped ac the beginning of the ZERO 2 period for a time determined by the rotation of the DISPLAY RATE Control 2 It ensures chat when the Hold 2 is grounded the conversion in process will be cornpIeced and new data will be stored in the m t ut storage register Then the cl...

Page 27: ...figure 18 TABLE 19 Zero Crossing Detector Outpur Levels I M N B c 0 0 5 i1 5 ov I 0 13 5 0 1 5 I i Buffer Storage register The ufferl torage Register is composed of flip flops arranged to copy the states of the various BCD counters The BUf fer Storage Register requires a Buffer Store command be fore any information can be transferred The flip flop circuits provide coded information for Decoder Dri...

Page 28: ...pllt Transistor Q507 serves as an emitter follower to reduce output impedance 2 Delay Hold Circuit There ace three major components in the Delay Hold circuit en RS type flip flop circuit a Wnijunction timing circuit an a ROld gate circuit RS Type Flip Flop Circuit The flip flop gates the output of the clock depending on the inputs at pins R and S The RS flip flop is coo strucced of gates QA5OlB an...

Page 29: ... Units Tens and Hundreds respec tively f Polarity Board The Polarity Board conteins various circuits which are controlled by signals 6 end C from the Zero Crossing Detector signal as shown in Figure 18 1 Polarity Indicator Control Cixc it This cir cuit drives the Polarity Indicator DS201 LO provide a Polarity display QAZOIA and QA206A are J K Flip Flop circuits which conrroi transistors Q201 and 4...

Page 30: ...nsistor pair QlOl and Q102 The Darlingto pair series regulares the 3 6 volt output 3 Transismr 4103 limits the output current to about 3 amperes C 170 Volt Supply 1 The 170 supply taps a c power from a second ary of transformer T101 Diode Dill and capacitor Cl12 farm a half wave rectifier with filtering 2 Transistor Ql19 amplifies the voltage devel aped by the resistor divider RUE and R129 The out...

Page 31: ...3 Refer co Table 22 which identifies all schematic part numbers included 4 3 WOW TO SE THE REPLACEABLE PARTS LIST This Parts List is arranged such that ehe individual types of components are listed in alphabetical order The perts for the instrument s Main Chassis are listed fallowed by printed circuit boards and other subassem blies Refer to Table 23 for listing of circuit des ignacion series assi...

Page 32: ...209 lrrF Cl210 01 WF Cl211 001 p Cl212 100 pF Cl213 033 UF Cl214 033 PI Cl215 150 pF Cl216 100 UF Cl217 100 GF Cl218 40 L Cl219 40 P Cl220 Ol fl Cl221 0047 UF Cl222 OO47 1 F Cl223 0047 p F Cl224 0047 p Cl225 5 PF 600 CelCD 600V Certl 200 Poly 500 POly 5oov P0ly 5oov POly zoov P01 200 P zoov Poly 2oov Poly 2oov Poly 84171 2oov POly 84171 2oov MY 13050 2oov MY 13050 600V cerll 72982 5ov EAl 90201 5o...

Page 33: ...Type Receptacle Microphone Type NOC Led 58474 82389 02660 DF21BC N113B EO PCZF BP 11 Slack CS 231 CS 32 Receptacle Triaxial Input 95712 33050 Z NT34 cs 181 Plug Triaxial Mate of 51209 cap Input Binding Post Terminal Black ID Receptacle 50 Pi Printer control Plug 50 Pin Mate of 51211 95712 2743 l NT34 cs 141 02660 31 007 CAP 18 58474 DPZlBC BP 11 Black 02660 47 40500 I CS 221 02660 57 30500 I 09922...

Page 34: ...P 1212 R1213 R1214 R1215 1010 n 1011 D 100 n 900 0 10 n l 4 l 2 w l 4 l Z l l 2 l 2 W 3 0 L R w 3 0 l R W 3 0 L R w 5 l 2 w 5 l 2 w L L l 2 w GCb 63060 Rx 1 GCb 63060 RX 1 MtF 07716 CBC MtF 07716 CBC DCb 91637 DCF 1 Z R20 101 RZO lOI1 R61 100 R61 900 RIZ 10 30 30 22 22 22 R1216 RI217 R1218 R1219 RI220 2 KR 7 15 Khl 10 Mn 2 2 MO 100 Ko ww 71450 lNS 115 MU 07716 CEC DCb 91637 DCF l 2 DCb 91637 DCF l...

Page 35: ...l 1 m 01121 E8 RI 680 01121 es RI 1 8K 11637 k 5 R4A 20K 91637 KS 5 0 716 cut 17870 1250 1 870 1250 17870 1250 17870 17870 07716 1250 1250 CEC INS 115 GC45 RCO KC07 RCO RC07 R4 2 K Ml 100K R166 1 0101K RL65 9O OOOK RL65 9 00OK R165 909 09 k165 101 01 R94 LOK 71450 71450 44655 44655 44655 44655 KP5 2K KP75 500K K76 220 R76 220 K76 220 K76 220 Mfg 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 2...

Page 36: ...49 22 TG 49 22 TG 39 22 TG 49 22 TG 53 22 W 58 22 TG 59 22 TG 53 22 Q1206 NPN Case TO 92 2N3903 Q1207 NPN Case TO 106 2N3565 Q1208 NPN Case TO 92 2N3903 Q1209 PNP Case TO 92 2N3905 Q1210 NPN Case TO 39 MN3003 QlZll PNP Case TO 39 MM4003 04713 Q1212 PNP Case TO 92 2N3905 04713 04713 07263 04713 04713 04713 POWERSUPPLY PARTS LIST Refer to Schematic Diagram 24044E for circuit designations CAPACITORS ...

Page 37: ...l Ii w Camp TC MtF MtF 44655 91637 07716 07716 44655 CB 682 cu 2 R76 6 8K 22 lo 4 25 W I 1 a w l l 8 w lO l 4 w RlSl 0 2 22 RSS 10K 22 R88 1 X 22 R76 1K 22 CEA 1oKn CEA l lM C 102 MCF MCF Rl06 R107 R108 RlO9 RllO 100 n 150 n 33 kR 3n 680 0 Rlll 3 3 kfi R112 4 7 k0 RI13 3 3 kfl R114 4 75 kil R115 2 kfl R116 8 06 kn R117 18 2K R118 7 5 kff R119 33 kfi RI20 3R 1 l S w l l 8 w lO l k w 1 II2 w IO l 4 ...

Page 38: ...05 QlO6 Q107 QlO8 Q109 QllO TG 68 TG 54 l G 39 x 39 x 33 TG 39 w 43 TG 39 TG 39 TG 33 Qlll 40319 02734 TG 50 Q112 S17638 07263 c 33 Q113 517638 07263 TG 33 Q114 2N3565 07263 TG 39 Q115 2N3565 07263 TG 39 Q116 S17638 07263 TG 33 Q117 517638 07263 TG 33 QllE 40346 02735 w 44 Q119 40346 02735 TG 44 9120 2N3565 07263 TG 39 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 POLARITY BOARD P C ...

Page 39: ... R76 1 5K 23 camp 44655 RC07 R76 1 5K 23 TRANSISTORS Mfg Keiehley N mber Code Part NO 2N5184 02735 W 67 2N5184 02735 TG 67 O 1 DISPLAYIOVERLOAD BOARD PC 2411 REPLACEABLE PARTS LIST Refer o Schematic Diagram 240310 for circuit designations Fig Ref 23 23 INTEGRATED CIRCUITS Mfg Mfg Keithley Fig uesig VA301 QA302 QA303 QA304 QA305 QA306 LJeSCriptiO Dual J K Flip Flop Dual J K Flip Flap Hex InverCer Q...

Page 40: ...Flop Mfg Mfg Ksithley Fig Code Pert NO Part No Ref 04713 MCS9lP IC 9 25 04713 MC891P IC 9 25 04713 MC89lP IC 9 25 Dual J K Pli Flo 04713 MC89OP IC 8 Dual J K Flip Flop 04713 MCS9OP IC 8 QA406 Dual J K Flip Flop QA407 Quad 2 Input Gate QA408 Quad 2 Input Gate QA409 Dual J K Flip Flop QA410 Dual J K Flip Flop QA411 Dual J K Flip Flop QA412 Dual J K Flip Flop QA413 Dual J K Flip Flop QA414 Dual J K F...

Page 41: ...SDZ 20 106 C179 10M 26 CRYSTAL Circuit neaix Y501 Mfg Mfg Keithley Description Code Parr No Part No Crystal for 60 Hz operation 80164 CR 1 CR 1 crysea for 50 HZ operation 80164 CR 2 CR 2 DIODES CitYlliC Deaig D501 D502 0503 Type Silicon Silicon Silicon Mfg Number Code lN645 01295 lN645 01295 lN914 01295 INTEGRATED CIRCUITS Keithley Part No RF 14 RF 14 RF 28 Fig Ref 26 26 26 CFtxUFC Desi QA501 QA50...

Page 42: ...camp 44655 camp 44655 camp 44655 MtF 07716 camp 44655 camp 44655 TRANSISTORS CB 472 R76 4 7K 26 CB 563 R76 56K 26 m 472 R76 4 7K 26 R76 470 26 R76 680 26 R76 470 26 R 3 237 26 m 471 CS 681 m 471 CPA 237n CEA X 0 RSS LK 26 cm 4 99m RSS 4 99K 26 CB 563 R76 56K 26 CEA 2370 Raa 237 26 CL 332 R76 3 3K 26 m 102 m 103 m 102 R76 1K 26 m 392 R76 3 9K 26 m 392 R76 3 9K 26 m 331 R76 330 26 C 152 R76 1 5K 26 ...

Page 43: ... 27 27 C612 C613 C614 17554 17554 17554 00656 72982 56289 TXJZ 20 106 TSDZ 20 106 TSD2 10 226 C615 C616 C617 cc22 c77 1 5P ED 10 C22 LOP 5c13 C85 lM C618 500 72982 ED 10 C22 lOP 27 circuit txsig 0601 Type N lllhe r Zener IN916 Mfg Keiehley Fig COdt Part NO Ref 0 713 Z 5 27 lN936 2N3565 2N3565 ix 5 x 39 x 39 27 27 27 D605 Silicon IN645 01295 RF 14 27 0606 Silicon lN645 01295 RF 14 27 0607 Silicon l...

Page 44: ... 2 ktl 220 R 10 kfl lO l 4 w 10 l 4 w lO l 4 w lo l 4 w lO l 4 w NOTE rhis part selected in final test 42 MtF CDIQP 07716 07716 07716 CEA CEA Raa 7 5K 27 Raa 7 5K 27 Raa 7 5K 27 73138 77PRlOK RP64 1OK 27 91637 MTF L B u77 27 07716 CEA RBB 7 5K 27 07716 CEA Raa 7 5K 27 07716 CE4 Raa 7 5K 27 73138 77PRlOK RP64 10K 27 44655 RC07 R76 10K 27 44655 RC07 R76 100K 27 91637 w i a R177 49 9K 27 44655 RC07 R...

Page 45: ... buffer is composed of 4 resistors and 3 transistors A sample buffer circuit is given in the lower lefchand corner of the Schematic Following is a ty ical replaceable pares list for each buffer BUFFER RESISTORS A fhr P circuit b8i e RlOOl 8 1002 R1003 RIO04 ahe 180 k0 3 9 kR 120 kc7 10 k Mfg Mfg Keirhley Fig Rating Type Code Part NO Part NO Ref IO l 4 w camp 44655 RCO7 R76 180K 28 lO 114 w camp 44...

Page 46: ...R 10 kn 2 k0 120 kn 10 kR 180 kfl 3 9 k0 lo l 4 w 10 l 4 w 10x li4 N IO l 4 w Lo l 4 w lo l 4 w 10 l 4 w 10 l 4 w lO l 4 w lO l 4 w 10 l 4 w lO l 4 w lO l 4 w l l 8 w l 1 a w 1 l 8 w lO l 4 w lO l 4 w lO l 4 w lO l 4 w Comp 44655 RC07 Comp 44655 RC07 Camp 44655 RC07 CNllp 44655 RC07 Camp 44655 RCO7 R76 1K 29 R76 3 3K 29 k76 1K 29 R76 3 3K 29 R76 L20K 29 C0Ulp 44655 RCO7 R76 10K 29 camp 44655 RC07 ...

Page 47: ... lo l 4 w lo l 4 w Type Como Mfg Mfg Keiehley Fig Code Part NO Part NO Ref 44655 RCO K76 10K 29 camp 44655 camp 44655 Camp 44655 Camp 44655 RC07 RC07 RC07 RC07 R76 120K 29 R76 10K 29 R76 180K 29 R76 3 9K 29 2N3565 07263 E 39 29 2N356 5 07263 TG 39 29 2133565 07263 m 39 29 45 ...

Page 48: ...69154 C mp e ts 1 C Smith street Biddeford Maine 04005 General Radio Co 22 Baker Avenue West Concord Mass 01781 Hathaway Instruments Inc 5800 E Jewel1 venue Denver C l rado 80222 Ohmite Mfg CO 3601 Howard Street Skokie Illinois 60076 Sprague Electric co North Adams Mass Superior Electric Co The 383 Middle Street Bristol Con 06012 Cambridge Thermionic Corp 430 Concord Avenue Cambridge Mass B ssman ...

Page 49: ...on NOTE If the insrrument problem cannot be readily located or repaired contact a Keithley rep resentative or the Sales Service Department Cleveland Ohio TABLE 5 l Troubleshooting orrective Action Probable Cause Power failure 21OV Supply failure 120 Supply failure Line switch set at 234V with 117V line incmt Analog amplifier La out of balance FET Board faulty supply voltage is missing Overload cir...

Page 50: ...und plug a the Line cord is connected to earth ground s that the instrument chassis is not at B live potent Turn the instrument on and allow to warm up for one hour This will ensure that all thermal variations within the instrument have been stabilized 6 5 ADJUSTMENTPROCEDURE a Zero Adjustment Set the front panel controls as follows Zero Check Button Lock Sensitivity Switch 0 0000 Range Switch Vol...

Page 51: ...oltage in Ween the CLOCK test point and 1 Adjust trimming decade steps from 1V to 1OOV 0 02X Measure the capacitor C503 so that the frequency reading is 120 k z analog weput at 51207 for fuiL scale indication on kl Hz for instrumenta operated at 60 Hz The crystal each range The 1 volt output should be within Y501 should be a Keithley CR L for 60 Hz CR 2 for 50 2 50 Hz The frequency reading should ...

Page 52: ... A 3 4X Full Scale output 1 000 o 5 1 000 3 5 1 000 73 5 1 000 70 5 1 000 5x 1 000 9 5 1 000 1 000 73 5 T2 1 000 T2 1 000 74 1 000 74 1 000 54x TABLE 6 5 Coulombs Ranges wge Sensitivity Switch Switch Feedback Input Current Full Scale Output lo 79 10 8Q 10 g 18 lo Q 1 000 Fast 10 8A 0 5X 1 000 1 000 Fast 10 gA 3 5 1 000 1 000 FBBf 10 lOA 5X 1 000 1 000 Fast lo 1lA 30 5 1 000 I The time interval for...

Page 53: ...itch VOLTS Feedback Switch Normal Connect digital voltmeter B to the 1 vale analog output Unlock the set 0 check button Apply approx 2 volts at input using Voltage Source 0 AdjusC the input e urce so that the analog reading is 1 9995 Volts Adjust the l CAL potentiometer R611 so that rhe display indicates between 1 999 volts and a blank ed display overload Meplay should alternate be tween readings ...

Page 54: ...ed Probe Description The Model 61018 is a shielded cable with B gripping type probe and 30 inches of low noise cable terminated by a UHF connector Model 6103A Divider Probe The Model 6103A is a shielded cable with a needle point probe and 30 inches pf Law noise cable terminated by a UHF cmulector The probe includes a 1OOO l voltage divider with a LOL2n input resistance Accuracy is 26 at 30 kilovol...

Page 55: ...rminal to the GUARDoutput on the eleceromecer be the elec trometer in FAST mode far ohms measurement Model 6105 Resiseivity Chamber The Model 6105 is a guarded test fixture for measure ment of surface and volume resistivities The chamber is designed in accordance with ASTM Standard Method of Test for Electrical Resistance of Insulating Materials 0257 66 The 6105 can be used in conlunction with a e...

Page 56: ...etric current measuremer when using a current source and electrometer or pica ammeter Adapters Items 4 and 5 are useful for car version from UHF to BNC terminations Models 2501 2503 Static Detector Probes The Models 2501 and 2503 are specially designed de tectors used to measure static charge on plane surfaces Either probe must be used with an electrometer such as the 615 Model 2501 The 2501 is us...

Page 57: ...t at factory CAIN LINEARITY Within 3 mV for signal levels below 1 FREQURKY RESPONSE Fast dc co IOOHZ Slow dc to 0 3 z 3 d response 1NP T RESISTANCE 106 ohms FULL SCALE INPUT 1 volt with 100 overrange MAXIMUM INPUT OVERLOAD 100 vole INPUT ISOLATION Greater than 10720 ohma at 50 relative humidity and 25 C shunted by less than 100 pF MAXIl M COMMON MODE VOLTAGE 1500 volts peak dc or ac OUTPUT ISOLATI...

Page 58: ... 7 Rubber Fc oe Insert 4 FE 6 8 Screw Phillips 6 32x1 4 2 9 Tilt Bail 1 147048 Assemble 1 2 3 4 5 6 Remove the rack angles attached to the rack mount instrument The four IO 32 slotted screws suppli with the instrument should be used to install the bench style top cover item 1 Remove the bottom cover to facilitate the mountin of the non skid feet and tilt bail assembly Se a screw driver to turn the...

Page 59: ...wurements 3 ft long terminated by a probe for making point to point measuremenrs which require a triaxial cable with a guarded pftbt having an insulation resistance greater than 10 Model 1531 Gripping Probe Description The 1531 is a triaxial cable 3 ft long Applicarion The 1531 may be used for measurements terminated by B special gripping type probe The 1531 insulation resistance is greater than l...

Page 60: ...ds The ex 3 ft cable terminated with a CS 220 connector tender cards permit access to test points and cali bration controls on cards having either 15 or 22 pina parts List Model SC51 Fifty Conductor Cable Description Keithley Part No Description The Model SC51 cable is useful for fabri cating a custovlength cable for use with the Model PC Card Extractor 4195 4401 Printer Output cards The cable is ...

Page 61: ...sembly Keithley Part No 1 Top Cover Assembly Cover Fastener 2 Bottom Cover Assembly Cover Pastener 3 Angle Rack Assemble 4 Screw Slotted 10 32 Y l 4 5 Front Panel b Chassis 1 2 1715 17162C FA 54 179bOC 17957c FA 54 146248 2379bD 241818 FIGURE 20 Mechanical Assembly 03 72 59 ...

Page 62: ...COMPONENT LAYOUTS M EL 61 r I PC209 I I PC218 I t PC229 I E k I I a r FIGURE 21 Chasste Top View 60 037 L ...

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Page 64: ...MODEL 615 COMPONENT LAYOUT FIGURE 23 Component Layout PC207 0372 67 ...

Page 65: ...COMPONENT LAYOUT MODEL 615 68 FIGURE 24 Component Layout PC241 037 ...

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Page 68: ...MODEL 615 COMPONENT LAYOUT FIGURE 25 Component Layout PC229 0372 71 ...

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Page 72: ...MODEL 615 COMPONENT LAYOUTS FIGURE 27 Component Layout PC246 0372 75 ...

Page 73: ...COMPONENT LAYOUT MODEL 61 FIGURE 28 Component Layout PC218 76 03 ...

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Page 76: ... MODEL 615 0372 COMPONENT LAYOUT FIGURE 2iJi Component Layout PC209 79 ...

Page 77: ...COMPONENT LAYOUTS MODELf 3 1 c 3 FIGURE 30 Switch S1201 RANGE 80 03 ...

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