Keithley 610C Instruction Manual
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Keithley 610C Instruction Manual

Keithley 610C Instruction Manual

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Model 610C, 610CR
Solid-State Electrometers
Instruction Manual
A G R E A T E R M E A S U R E O F C O N F I D E N C E

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Summary of Contents for Keithley 610C

  • Page 1 Model 610C, 610CR Solid-State Electrometers Instruction Manual A G R E A T E R M E A S U R E O F C O N F I D E N C E...
  • Page 2 WARRANTY Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 1 year from date of shipment. Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batteries, diskettes, and documentation.
  • Page 3 Keithley products are designed for use with electrical signals that The instrument and accessories must be used in accordance with its are rated Installation Category I and Installation Category II, as de- specifications and operating instructions or the safety of the equip-...
  • Page 4 Keithley Instru- symbol on an instrument indicates that the user should re- ments. Standard fuses, with applicable national safety approvals, fer to the operating instructions located in the manual.
  • Page 5 Model 610C, 610CR Solid-State Electrometers Instruction Manual Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Third Printing, December 2001 Document Number: 29113 Rev. C...

  • Page 6: Table Of Contents

    CONTENTS Section SPECIFICATIONS. GENERAL DESCRIPTION • • • • • • • • • • • • • • • • • • • • OPERATION . • • • • • • • • • • • • • •...
  • Page 7 ILLUSTRATIONS Title Front Panel Controls . . Rear Panel Controls . Front Panel Controls, Model 610eR. Rear Panel Controls, Model 61QGR . Guarded Voltage Measurement..Current Measurements, Loading Error. Galvanometric Measurements . . . Resistance Measurements ..Recorder Output, 100 mV Divider Network.

  • Page 9: General Description

    Fast warm up is an inherent characteristic of this Electrometer. It can be used well within '30 min­ The Keithley Model 6l0e Electrometer is a versa­ utes of a cold start on the most sensitive range and tile, completely solid-state instrument which measures almost immediately on less sensitive ranges.
  • Page 10 TABLE 2 Front Panel Controls and Terminals Control Functional Description Paragraph RANGE Switch Sets the parameter to be measured: VOLTS, AMPERES, OHMS, or 2-3a (8106) COULOMBS. A. I so sets the particular range for a given parameter. MULTIPLIER Switch Sets the full-scale meter sensitivity. When used with AMPERES, 2-3a (5107)
  • Page 11 METER RANGE SWITCH ZERO CONTROL SWITCH 5106 5109 FINE R142 ZERO CONTROL MULTIPLIER ZERO CHECK MEDIUM 5101 SWITCH S107 SWITCH S103 GROUND INPUT ZERO CONTROL POWER FEEDBACK J102 J101 COARSE S102 NEON SWITCH DS101 5105 FIGURE Front Panel Controls, Model 6l0eR. 1MA-3V OUTPUT FUSE...

  • Page 12: Operation

    If a well shielded chamber and a well made high impedance transfer switch is available, it is advan­ The Model 610C INPUT Receptacle is a Teflon­ tageous to connect the Model 610C to the ctrcuit only insulated UHF-type connector. A shield cap is provid­...
  • Page 13 The input voltage on the rear panel of the instrument. Connect the drop of the 610C in the NORMAL mode is a function of remaining alligator clip leads as shown in Figure the Multiplier setting and therefore the loading error should be noted as shown in Figure 6.

  • Page 14: Guarded Voltage Measurement

    TO Xl OUTPUT INNER SHIELD BLACK GUARD RING MODEL 610C INPUT CIRCUIT HIGH OUTER S HIELD GROUND MODEL 6108 CABLE UNKNOWN CONNE CT BETWEEN HIGH AND GND FIGURE Guarded Voltage Measurement E S / R S I S - 1 M...
  • Page 15 LOCK method the 6l0C is used as a null detector. 10 - RANGE Switch COULOMBS 610C should be used in conjunction with an accurate Multiplier Switch current source such as the Keithley Model 261 as FEEDBACK Switch FAST shown in Figure Connect the 6l0C input terminals in series 2-5.
  • Page 16 This out­ For information concerning Static Charge measure­ put is suitable for use with recorders which respond to current such as the Keithley MOdel 370 Recorder. ments, request the Product Note entitled "Elec­ trometer Static Charge Measurementsll• The Model...

  • Page 17: Circuit Description

    The internal circuitry is arranged such that a fu11- The Keithley Model 610C is basically an extreme­ ly stable and linear de voltmeter with a full-scale scale input voltage (e i ) results in exactly a 1 mil­...
  • Page 18 Jl03, allowing %1 milliampere, ±5%, to pass through an e x ternal load. 3-6. COULOMBMETER OPERATION. The Model 610C circuit for measuring charge is similar to that used for an 3-4. AMMETER OPERATION. ammeter with the fast method.

  • Page 19: Ohmmeter Configuration, Normal Mode

    INPUT OUTPUT MULTIPLIER RANGE GUARD Mode . FIGURE Ammeter Configuration, FAST xl OUTPUT UHF INPUT OUTPUT MULTIPLIER FIGURE Ohmmeter Configuration, NORMAL Mod e.

  • Page 20: Accessories

    GENERAL. The following Keithley accessories Resistivity can be determined by measuring the can be used with the Model 610C to provide additional current through a sample with a known voltage convenience and versatility. impressed. The measurement can be made most conveniently when a set of electrodes are used that 4-2.

  • Page 21: Servicing

    - megohm resistors, RItO, RIll and RI t2, should are specially selected and matched; order only as a be checked approximately every 2 or 3 years for speci­ plug - in unit, part number 237 33A from Keithley Instru­ fied accuracy. ments, Inc.
  • Page 23 Ql03 and Ql04. Check Ql03 and Ql04 by removing shorts in the base circuit of Ql07 and Ql08. them and adjusting again for null. If null is no� reached, replace the transistor pair �ith a new pair. Connect Model 153 to the collector of Q109. Adjust the FINE ZERO Control for null.
  • Page 24 Chassis, Side View. FIGURE 14.
  • Page 25 FIGURE 15. Circuit Board, pelS3.
  • Page 26 FIGURE 16. Printed Circuit Board, PC-186.
  • Page 27 DECK 2 rr a: rr rr DECK SWITCH 5101 610C- Switch, S101. FIGURE MEDIUM ZERO, DECK 2. 610C- SWITCH 5102. FIGURE 18. Switch, 5102. COARSE ZERO,...
  • Page 28 " CIII RI02. '" RIO.::3 ..; ,.., RI07 RIOS RIO.9 RIIO Rill R.1I2 10Z. CI03 CI04 , =\ RI13 U> CIOS - c:�:; CI09 FIGURE 19. S�itch, RANGE 5106.
  • Page 29 /"Tl � � R I 7 5 ("') I'\l R17.3 R.t72 � ...J R I7 0 R,.IG G 1'2.1 FIGURE 20. Switch, Multiplier, Sl07.

  • Page 30: Calibration

    Zero the meter on the Then set the Mul­ .001 Multiplier Switch setting. tiplier Switch to 1; apply 1 volt %0.05% with the Keithley Model 260 Nanovolt Source to the Model 610C 6-2. CALIBRATION SCHEDULE. INPUT Receptacle. Monitor the output with Keithley Models 160 or 163DVM and a 3:1 adapter.

  • Page 31: Front Panel Controls

    Set the METER Switch to CENTER ZERO and zero For each run allow the Electrometer to warm up for 1/2 the Model 610C on the 1 millivolt range. hour. A zero drift of less than 2 millivolts after the first half hour is indicative of a satisfactory The Meter noise must be less than 25 micro­...
  • Page 32 Apply 10 about once a year, if components are replaced, or if volts from the Keithley Model 241 Voltage Supply through a Keithley Model 5155 l O ll ohm standard to the other adjustments are made. If accuracy is verified over all ranges, the Model 6l0C should be able to meet Model 6l0C input.
  • Page 33 FEEDBACK Switch to NORMAL. NOTE Zero the Model on the millivolt range. If other than a constant amplitude signal 610C generator (Wavetek) is used, it will be Set the Signal Generator to Hz at minimum necessary to monitor the output of the output.

  • Page 35: Replaceable Parts

    PARTS 7- 1. REPLACEABLE PARTS LIST. The Replaceable Parts and serial number, the Keithley Part Number, the cir­ � List describes the components of the Models 610e and cuit designation and a description of the part. structural parts and those coded fo r Keithley man�fac­...
  • Page 36 CAPACITORS (Cont'd.) Circuit Mfg. Mfg. Keithley Fig. Value Type Part No. Rating Code Part No. Ref. C1l4 .033 �F 200V 97419 M2WR-.033M C143-.033M C1l5 .033 �F 200V lIPF 97419 M2WR-.033M C143-.033M C1l6 150 pF CerD DD-151 1000V 71590 C64-150P C1l7 470 �F...
  • Page 37 2, 4, 14 Knob, 1MA CAL Control 80164 KN-58 T101 Transformer 80164 TR-70A Top Cover Assembly (610C) 80164 17972B Feet, plastic, 4 required (610C) 80164 FE-5 Handle (610C) 80164 HH-18 Bottom Panel (610C) 80164 21540C Bottom Panel (610CR) 80164 22284C...
  • Page 39 1/2%, 1/2 I< 07716 R61-330 R189 10%. 1/4 I< Comp 44655 RC07 R76-27K Nominal value, factory set. Part of input plug-in board. replace only by ordering Keithley Part Number 23733A. TRANSISTORS Keithley Fig. Circuit Mfg. Ref. Number Code Part No. QI0l...
  • Page 40 Chassis Assembly Parts List Item Keithley Description Part No. Top Cover Assembly 17972B 17076B Top Cover (Sheet Metal) Handle Assembly HH-18 D8-32xl/4 slotted, P. li. Screw 1!8-32xl/4", slotted 21540C Bottom Cover Assembly Bottom Cover (Sheet Metal) 2154lC Tilt Bail 15004B...
  • Page 41 �/ FIGURE 21. Chassis Assembly...
  • Page 42 S. Main Street 39191 5915 McGregor Street Los Angeles, Calif. 90003 Manchester, N.H. 03102 44655 Ohmite Mfg. Co. 3601 Howard St. Keithley Instruments, Inc. 80164 Amphenol Corp. 02660 Skokie, Ill. Aurora Road 60476 28775 2801 South 25th Ave. Cleveland, Ohio...
  • Page 44 Specifications are subject to change without notice. All Keithley trademarks and trade names are the property of Keithley Instruments, Inc. All other trademarks and trade names are the property of their respective companies. Keithley Instruments, Inc. 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: 440-248-6168 1-888-KEITHLEY (534-8453) www.keithley.com...

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610cr

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