Download
Share
Print this page
Keithley 427 Instruction Manual
  1. Manuals
  2. Brands
  3. Keithley Manuals
  4. Amplifier
  5. 427
  6. Instruction manual
Keithley 427 Instruction Manual

Keithley 427 Instruction Manual

Current amplifier
Hide thumbs

Advertisement

Quick Links

Download this manual
Enlarged version
INSTRUCTION MANUAL
MODEL 427
CURRENT AMPLIFIER
0 1975, KEITHLEY INSTRUMENTS, INC.
CLEVELAND, OHIO, U.S.A.
DOCUMENT NUMBER 29103

Advertisement

loading

Related Manuals for Keithley 427

Summary of Contents for Keithley 427

  • Page 1 INSTRUCTION MANUAL MODEL 427 CURRENT AMPLIFIER 0 1975, KEITHLEY INSTRUMENTS, INC. CLEVELAND, OHIO, U.S.A. DOCUMENT NUMBER 29103...
  • Page 2 CONTENTS MODEL 427 CONTENTS GF,Ng3,&.L DESCRIPT~ON-------------------------------.-------- OPERATION-------------------------------------------------- APPLICATIONS----------------------------------------------- ACCESSORIES------------------------------------------------ ClRC"IT DESCRIPTION---------------------------------------- REp~Cp‘&LE PARTS------------------------------------------ CALIBRATION------------------------------------------------ SCNEMATICS---------------------------------------------------- 1074...
  • Page 3 ILLUSTRATIONS MODEL 427 ILLUSTRATIONS Figure Title Page Front panel. __-___---___-_____-___________________ Front pane1 Controls. ________--______-____________ Rear Panel Controls. shunt Method Measurement, -----------------__------ Effect Shunt capacitance. ---------------------- Compensation Shunt Capacitance. --------------- Extended Frequency Response. ---------------------- Fee&a& Method. _--__-_-__________-_______________ Input Voltage N&se. -------------___--------------...
  • Page 4 MODEL 427 SPECIFICATIONS SPECIFICATIONS RANGE: 10’ to 10” volts/ampere in eight decade ranges. (10-13 ampere resolution to 10.” ampere full output). OUTPUT: volts at up to 3 milliamperes. OUTPUT RESISTANCE: Less than 10 ohms dc to 30 kHz. OUTPUT ACCURACY:...

  • Page 5: Operation

    MODEL 427 GENERAL DESCRIPTION SECTION GENERAL DESCRIPTION l-1. GENERAL; The Model 427 Current Amplifier C. Built-in Current Suppression. Small changes high-speed, feedback-type amplifier with particular signal level be measured since large ambient features useful automated semiconductor testing, current levels can be easily suppressed.
  • Page 6 GENERAL DESCRIPTION MODEL 427 TABLE 1-l. Front Panel Controls and Terminals Functional Description Paragraph PUSH Power Switch (S302) Controls power instrument. 2-4, sets gain Volts ampere. GAIN Switch (5201) 2-4, Sets rise time Fn milliseconds. RISE TIME (5101) 2-4, SUPPRESSION...
  • Page 7 MODEL 427 GENERAL DESCRIPTION ,----SUPPRESSION-, GAIN FINE POLARITY SWITC ADJUST SWITCH INPUT ZERO ADJ OVERIDAD Power OUTFW 5202 DS302 S302 R235 5102 FIG"RF want Panel Controls. FIGURE 3. Rear Panel Controls. 0471...
  • Page 8 OPERATION MODEL 427 SECTION OPERATION 2-1. MEASUREMENT CONSIDERATIONS. Prom this equation irmnediately apparent that m%QB”rement emall current =equi=es large values The DleasUrement Current-Detection Devices. i.e., high impedance levels. Howwee, thfe gives ‘small electrical c~rrent8 has been basis difficulties meas”=ements requiring...
  • Page 9 MODEL 427 OPERATION this oethad ueeful only application* where The rms thermal noise current (in) generated by * shunt capacitance C is constant. Aaide from resistance R is given thin drawback this * 1eSitimste approach which being low-noise, high-speed current- meesuring applicatians.
  • Page 10 OPERATION MODEL 427 T;; = J-zTp- he noted that even though useful bandwidth system extends only there noise com- where e is electronic charge. The contribution ponents higher frequency present. To obtain this noise generator also white. only best widebend-noise...
  • Page 11 MODEL 427 OPERATION Frequency compensation. The bendwidth high-speed feedback FIGURE FIGURE system (Fig. he limited by using e filter with either e -6 dB/actave dB/octave roll-off. The effect filter on the noise spectrum showwin 2 nllcp Fig. Effect input capacitance...
  • Page 12 OPERATION MODEL 427 2-3. CONNECTIONS, 2-5. OPERATING CONSIDERATIONS. Input. The input receptacle (5202) e SNC Gain. The gein Model 427 is defined type which metes with coaxial cables such es Keithley terms volts *“pare. Since output level Models 8201 end 8202.
  • Page 13 APPLIChTIONS MODEL 427 SECTION APPLICATIONS 3-3. NOISE-IMPROVEMENT CONTOURS. The sensitivity 3-1. CURRENT~MEASURING SYSTEM. The typical current speed Model 427 (for either meaeuring system consists a current source, a cur- measurements) can be compared best perfarm- rent amplifier, and a monitoring...

  • Page 14: Accessories

    The following Keithley accesaaries 4-l. GENERAL. Manual supplied with each accessory giving complete be used with Model 427 eo provide additional con- operating information. venience and versatility. Model 1007 Rack Mounring Description: Application: The Model 1007 a dual rack mounting...
  • Page 15 ACCESSORIES MODEL 427 Model 1007 Dual Rack MountinS Assembly Instructions: Tighten screwy (Item 8) on instrument “B”. Before assembling rack kit, determine Insert “mounting clamp” behind “corner pasition each instrwnent. Since inserumenfs bracket” (Item 7) an instrument “8” a8 shown.
  • Page 16 CIRCUIT DESCRIPTION MODEL 427 SECTION CIRCUIT DESCRIPTION GENERAL. The Made1 427 is composed a feed- +15 ” Reguletor. AC power tapped from 5-1. secondary transformer T301. The ec ia rectified beck amplifier, e X10 gain filter section, suppression P full-weve...
  • Page 17 Cl01 r--------1 RIOI RI16 FIGURE component Layout - PC-291. 0471...
  • Page 18 COMI FIGURE 17. Component Layout - PC-290.
  • Page 19 MODEL 427 COMPONENT LAYOUTS FIGURE 19. FTGURE 18. component Layout - PC-292. component Layout - PC-289. 0471...
  • Page 20 MODEL 427 COMFUNENT L4YOoTS PC-290 Chaaais - Top View. FIGURE 0471...
  • Page 21 MODEL 427 SECTION REPLACEABLE PARTS REPLACEABLE PARTS LIST: This section contains turer's Part Number, and the Keithley Part Number 6-l. Also included a Figure Reference Number where a list components used this instr"ment user reference. The Replaceable Parts List describes applicable.
  • Page 22 REPLACEABLE PARTS MODEL 627 TABLE 6-3. PC Board Designation series Filter Circuit PC-291 Filter Circuit PC-292 Amplifier PC-289 Power Supply PC-290 PC-290 SuppressFan circuit Overload Circuit PC-290 TABLE 6-4. Mechanical Parts Lise Itern NO. Qty. Per Assembly Keithley Part Figure Chassis Assembly Front...
  • Page 23 MODEL 427 REPLACEABLE PARTS FIGURE 21. Chassis Assembly-Exploded View. FIGURE 22. Bottom Cover Assemblv. 0471...
  • Page 24 REPLACEABLE PARTS HOOEL 427 FILTER BOARD ("100" SERIES, PC-291*, PC-292) CAPACITORS circuit Mfr. Mfr. Keithley Fig. Ilesig. Value Rating Code msig. Pat-e No. Ref. Cl01 CPR-15OJ P0ly 71590 C138-15OP Cl02 " Poly 71590 CPR-68OJ C138-68OP CPR-22OOJ, Cl03 .0022 Poly 71590 C138-.0022M...
  • Page 25 FlLTER BOARD (cont'd) RESISTOR8 (cont'd) Mfr., Mfr. Keithley Fig. Value RCltF"g Type Code Desig. i'art Ref. R106 07716 CF.&-lkn R88-lk 07716 CEA-lkS2 RIO, 1%, 1/B R88-lk Camp 80294 3009P-200 R108 RP-89-200 :l%, 91637 Km-Ml R109 R169-1M 91637 MFF-536R RllO .l%, 112 w R168-536k RCO7-102...
  • Page 26 MODEL 427 FiXPLACEABLE PARTS AMPLIFIER BOARD (cont'd) DIODES Mfr. Keithley Mfr. Fig. CirCUit Code msiu. Part Ref. Type Desig. D201 Special 80164 -2245&A .2&l\;' (*‘4 0202 Special 80164 .?&5sk Z2&55A ;> fj 3 :I ,~ c:Jj Silicon, NPN, case TO-106...
  • Page 27 MODEL 427 REPLACEABLE PARTS AMPLIFIER BOARD (cont'd) RESISTORS (cont'd) Mfr. Keiehley Fig. Value Rating Type Code Llesig. Part Ref. R226 63060 RZO-109 R*l-rb20 g::::;10 R227 1010 63060 R20-10lC$3~5-,&0 R228 10%. l/4" camp 44655 R76-15 x07-150 R229 ComJ 10%. 114 w...
  • Page 28 REPLACEABLE PARTS MODEL 427 MOTHER BOARD (cont'd) DIODES (cont'd) Mfr. Ketthley Mfr. Fig. Cit-CUit Code Part Type rJesig. Ref. rlesig. 01295 RF-28 D308 Silicon lN914 SiliCOll 01295 lN914 RF-28 0309 01295 RF-28 D310 Silicon lN914 0311 Silicon 01295 lN645 RF-14...
  • Page 29 MODEL 427 REPUCEABLE PARTS MOTHER BOARD (cont'd) RESISTORS (cont'd) circuit Mfr. Mfr. Keithley Fig. Value Rating lksig. Type Code Desig. Part Ref. 100 kn " CEOlOOI& R94-look CEOM-i R94-1M DC-l-1OMn 1%,2 DC-2-100Mo Rx-l-1090 f$e~-/“G hR331 1010 63060 Rx-l-101On *R332 1011...

  • Page 30: Calibration

    MODEL 427 SECTION CALIBRATION This section contains procedurea 7-1. GENERAI.. Line Regulation. checking instrument to verify operation within specifications. The procedures and adjustments should Plug Model 427 line cord a "ariac with Line Monitor. be performed exact sequence given obtain satisfactory results.

  • Page 31: Front Panel

    CW until overload light comes ~,,is connect DVM (1OV range) a reading l.OOOV. should occur between +10 and +11 volts. output 427 and adjust Filter Amplifier gain (R113) a reading 10.00 volts. Model 427 Suppression Polarity switch and repeat steps &...
  • Page 32 CALIBRATION MODEL 427 TABLE 7-2. WAVETEK MAX 10-90x RISE TIME GAIN V/A RISE TINE FREQUENCY RISE TIME ADJUSTMENT 100 Hz 1.50 "Is Slider 6 Pot ;;10 .3 me 500 Hz Slider 6 pot 0.40 1 kHz 0.22 .03 ma 2 kHz 0.60...
  • Page 33 MODEL 427 CALIBRATION TABLE 7-4. 427 Rise Time Max lo-90% Wavetek setting RfSe Time Frequency 10 kHz .015 10 !a 1 kHz .03 me .040 10 pa 1 kHz .15 ms 100 HZ .3 me .37 ma 100 Hz 1 me 1 ms 10 H7.

  • Page 34: Current Suppression

    Gain Accuracy. on the Model 163 should be within tolerance Connect Model 261 Picoampere Source input Model 427 and connect Model 163 to the Model 427 output. Model TABLE 7-7. Tima Co"sta"t 300 Ins. SUPPRESSION MODEL 163 Model 163 on the...
  • Page 37 I ’ / ’...
  • Page 38 IT-----3-----J...
  • Page 40 SERVICE FORM Model Serial No. P-0. No. Date Name Phone Company Address City State List all control settings and describe problem. (Attach additional sheets as necessary.) Show a block diagram of your measurement system including all instruments connected (whether power is turned on or not).
  • Page 41 8. Amplifier Rise Time a. Connect the Function Generator to the Model 427 input and connect the Modal 427 rear panel output to the oscilloscope using the test setup shown in Figure 24. b. Adjust the 109 through 101’ rangas within the specified lo%-90% rise time using the triangular wave frequency and adjustment listed in Table 7-2.
  • Page 42 INSTRUMENTS Model 427 Current Amplifier Addendum INTRODUCTION This addendum to the Model 427 Current Amplifier Instruction Manual is being provided in order to supply you with the latest information in the least possible time. Please incorporate this information into the manual immediately.
  • Page 43 Page 20; Replace Table with the following: FILTER BOARD (“100” SERIES, PC-291’, PC-292) CAPACITORS Mfr. Mfr. Kelthley Fig. clrcult Value Pall No. Ref. Deslg. Rating Code Deslg. Type 5oov Cl01 15OpF P0ly 71590 CPR-IBOJ Cl36-15OP Cl 02 68OPF 5oov Poly 71590 CPR-660J Cl36-660P...
  • Page 44 Page 22; Replace Table with the following: AMPLIFIER BOARD (cont’d) DIODES Mfr. Keithley Fig. Circuit Desig. Ref. Deslg. Part No. Type 24555A Special 80164 24555A D201 24555A D202 Special 80164 24555A 07263 2N3565 D203 Silicon, NPN, Case TO-106 TG-39 Silicon, NPN, Case 07263 2N3565 D204...
  • Page 45 Page 24; Replace Table with the following: (cont’d) MOTHER BOARD DIODES (co&d) Kelthley Mfr. Mfr. ClrCUlt Flg. Deslg. Part No. Ref. Code De&g. TYPe IN914 RF-28 D306 Silicon 01295 IN914 RF-26 01295 D309 Silicon IN914 RF-26 D310 Silicon 01295 RF-14 01295 1 N645 0311...
  • Page 46 HOW TO INSTALL IC-333 5 OF THE IC-333. 1 IXF THE Op AMP GOES INTO HOLE IOF PIN 2 OF THE CIp AMP GOES INTO HOLE CiF pIN S.*j: 3 OF THE Op AMP GOES INTO HOLE OF PIN D . PIN 4 OF THE OP iiw GOES...
  • Page 47 COMPONENT UYOUTS MODEL 427 rR201-+201 --y-C2031 -c107- FIGURE 19. FIGURE 18. Component Layout - PC-292. component Layout - PC-289.