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Model 6105 Resistivity Adapter Instruction Manual

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1. thickness of the sample in centimeters I is the current reading from the electrometer 1 1 16 in 2 70 cm AZ ZAR CALA LIT FIGURE 3 2 in 08 cm Do OPERATION b Surface Resistivity Measurements Place the short circuit plug over the lower two jacks leaving SURFACE clearly visible Insert the banana plug from the test weight assembly into the top jack Close the Model 6105 cover Apply the power supply volt age Read the current on the electrometer The value of the surface resistivity is found through the fol lowing calculation 53 4 Y o 1 ohms where o is the surface resistivity of the sample V is the applied voltage from the power supply in volts I is the current reading from the electrometer 2 2 CONNECTIONS uhf type receptacle Connect the power supply to the Connect the electrometer to the bne type receptacle Place the sample under the test weight as shown in Figure 5 The sample thickness should be between 1 16 and 1 4 inch 0 159 and 0 635 cm The diameter should be between 2 1 2 and 4 inches 6 29 and 10 2 cm 2 3 PROCEDURE The Model 6105 permits easy measure ment of a sample The test sample is placed between the two electrodes the desired test potential is selected from the voltage supply and the current pass ing through the test sample is measured by the elec trometer From readings from the voltage supply and the electrometer the resistivities can be comp
2. to these considerations measurement accuracy depends primarily upon the accuracy of the voltage source and the electrometer c Recommended instruments for use with the Model 6105 are the Keithley Model 240A Regulated High Volt age Supply and the Keithley Model 610C Multi Range Electrometer The Model 240A provides excitation voltages up to 1200 volts in calibrated one volt steps Its output is accurate within 1 The Model 610C pro vides direct reading current ranges to 10 14 ampere full scale Its accuracy is 2 of full scale to 10 11 ampere and 4 of full scale beyond Although the Model 240A and the Model 610C are the recommended instruments for use with the Resistivity Adapter the Model 6105 is compatible with all Keithley high voltage supplies and electrometers GENERAL INFORMATION 1 2 SPECIFICATIONS SAMPLE SIZE Maximum 4 inch diameter 10 2 cm diameter Minimum 2 1 2 inch diameter 6 3 cm diameter SAMPLE THICKNESS 1 16 inch to 1 4 inch 0 159 cm to 0 635 cm TEST VOLTAGE RANGE MAXIMUM TEST VOLTAGE VOLUME RESISTIVITY RANGES 1 5 x 102 to 1 5 x 1018 ohm inches 103 to 1019 ohm cm SURFACE RESISTIVITY RANGES 10 to 1018 ohms l volt to 1000 volts 1000 volts CONNECTORS Power Teflon insulated uhf type receptacle Electrometer BNC type receptacle DIMENSIONS 6 inches wide x 4 1 2 inches deep x 4 inches high NET WEIGHT 3 pounds 2 A T A FIGURE 1 MODEL 6105 FIGURE 2 RE
3. 2o A Ee T where D is the dimension indicated in Figure 3 For the Model 6105 Dy is equal to 2 1 8 inches or 5 40 cm VOLUME TO HIGH TO VOLTAGE ELECTROMETER FIGURE 4 VOLUME RESISTIVITY American Society for Testing and Materials Standard Methods of Test for Electrical Resistance of Insul ating Materials ASTM Designation D257 66 THEORY OF OPERATION 3 2 SURFACE RESISTIVITY The ASTM Standard states that surface resistivity o shall be calculated as follows where R is the surface resistance in ohms measured as specified in the publication g is the distance between the electrodes P is the effective perimeter of the guarded electrode for the particular electrode arrangement employed For the Medel 6105 which uses circular electrodes P is P D 5 o where D is the dimension indicated in Figure 3 SURFACE TO HIGH To VOLTAGE ELECTROMETER FIGURE 5 SURFACE RESISTIVITY SECTION 4 MAINTENANCE 4 1 MAINTENANCE The electrodes of the Model 6105 should be periodically cleaned with an alcohol and ether mixture or other suitable solvent The con nectors should also be kept clean to prevent ieakage when the electrometer is making a measurement The electrodes should also be kept smooth 7 E BIOL PRE SSIES TIVITY ADAPTER y 4100 RESISTIVITY ADAPTE EF 1 A Ge a ae ES i 2 ce 5 ght i ES bed saan JA E JME 11 an hos 7 2 gil i 8 7 3 as N RITA INTRUMENTO IN
4. KEITHLEY Model 6105 Resistivity Adapter Instruction Manual Contains Operating and Servicing Information Publication Date October 1972 Document Number 31415 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 During the warranty period we will at our option cither repair or replace any product that proves to be defective To exercise this warranty write or call your local Keithley representative or contact Keithley headquarters in Cleveland Ohio You will be given prompt assistance and return instructions Send the product transportation prepaid to the indicated service facility Repairs will be made and the product returned transportation prepaid Repaired or replaced products are warranted for the balance of the origi nal warranty period or at least 90 days LIMITATION OF WARRANTY This warranty does not apply to defects resulting from product modification without Keithley s express written consent or misuse of any product or part This warranty also does not apply to fuses software non rechargeable batteries damage from battery leakage or problems arising from normal wear or failure to follow instructions THIS WARRANTY IS IN LIEU OF ALL OTHER WARRAN
5. SISTIVITY MEASURING SYSTEM SECTION 2 2 1 PREPARATION FOR USE The Model 6105 is shipped with two thumb screw fasteners holding the test weight to the guard ring Remove these fasteners and store for later use These are used only for shipping and they should not be used during measurements In mounting the sample for measurement make sure there are no conductive paths between the electrodes other than those through the sample The sample should be supported from the electrodes so that the electrodes do not touch anything except the sample Do not handle the sample with bare fingers acetate rayon gloves are recommended For best results clean the sample sur faces with an alcohol and ether mixture or other suit able solvent a Volume Resistivity Measurements Place the short circuit plug over the upper two jacks leaving VOLUME clearly visible Insert the banana plug from the test weight assembly into the bottom jack Close the Model 6105 cover An interlock switch disconnects the potential to the sample if the cover is opened Apply the power supply voltage Read the current on the electrometer The value of the volume resistivity p is found through one of the following calculations p ERRE ohm inches 22 9 V A p ohm centimeters te 1 where p is the volume resistivity of the sample V is the applied voltage from the power supply in volts ty is the average thickness of the sample in inches t is the average
6. T mara D0 Megan u b A Set f MOTLEY INSTRUMENTS IE Livros Ovh Matra HA PARTS LIST Mfr Mfr Keithley Item Description Desig Code Part No Resistivity Adapter 80164 Model 6105 Test Weight Assembly 80164 15702A 1 Test Weight Stainless Steel 80164 16371A 2 Handle Assembly 80164 162314 3 Test Lead Assembly 80164 157068 4 lt Banana Plug 108 303 74970 BG 5 5 Fastener Thumb Screw 80164 SMC 4 6 Banana Jack 3 reqd 108 903 74970 BJ 6 7 Guard Ring 80164 16370A 8 Guard Ring Insulator 80164 15708A z Test Plate Assembly 80164 15709B Test Plate 80164 16369A ate of bne receptacle 31 002 02660 CS 44 10 Receptacle uhf Mil No SO 239 6804 91 37 CS 64 Mate of uhf receptacle Mil No 49190 5127 91737 CS 49 9 Receptacle bne 31 221 02660 cs 15 M 11 Modifed Short Circuit Plug a 80164 23443A t KEITHLEY Test Instrumentation Group Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 Printed in the U S A
7. TIES EXPRESSED OR IMPLIED INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES NEITHER KEITHLEY INSTRUMENTS INC NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT INDI RECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS INC HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES SUCH EXCLUDED DAMAGES SHALL INCLUDE BUT ARE NOT LIMITED TO COSTS OF REMOVAL AND INSTALLATION LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON OR DAMAGE TO PROPERTY KEITHLEY Test Instrumentation Group Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 216 248 0400 Fax 216 248 6168 CHINA Keithley Instruments Inc Holiday Inn Lido Office Building 404C Beijing China 100004 8610 436 2871 2860 8610 436 2871 FRANCE Keithley Instruments SARL 3 All e des Garays B P 60 91122 Palaiseau C dex 01 60 11 51 55 Fax 01 60 11 77 26 GERMANY Keithley Instruments GmbH Landsberger Str 65 82110 Germering 089 849307 0 Fax 089 84930759 GREAT BRITAIN Keithley Instruments Ltd The Minster 58 Portman Road Reading Berkshire RG30 1EA 01734 575666 Fax 01734 596469 ITALY Keithley Instruments SRL Viale Gimignano 38 20146 Milano 02 48303008 Fax 02 48302274 JAPAN Keithley Instruments Far Ea
8. st KK Sumiyoshi 24 Bldg Room 201 2 24 2 Sumiyoshi cho Naka ku Yokohama 231 81 45 201 2246 Fax 81 45 201 2247 NETHERLANDS Keithley Instruments BV Avelingen West 49 4202 MS Gorinchem Postbus 559 4200 AN Gorinchem 01830 35333 Fax 01830 3082 1 SWITZERLAND Keithley Instruments SA Kricsbachstrasse 4 8600 D bendorf 01 821 9444 e Fax 01 820 308 SECTION 1 1 1 GENERAL a The Model 6105 Resistivity Adapter is a guarded test fixture for measuring volume and surface resis tivities of materials when used with a regulated power supply and an electrometer The complete system per mits measurement of volume resistivity from 10 to 3 x 1019 ohm cm and surface resistivity from 103 to 5 x 1018 ohms in accordance with procedures of the American Society for Testing and Materials The Adapter can accommodate samples up to 4 inches in diameter and 1 4 inch thick with excitation voltages up to 1000 volts b The Model 6105 has been designed to minimize measurement error The electrode configurations con form to the ASTM recommendations for measurement of electrical resistance of insulating materials The test sample is shielded to prevent stray pickup The guard ring circuit is arranged to minimize leakage currents from the measuring circuit Uniform pressure is always applied over the measuring area because the test sample is held between the spring loaded guarded electrode and the one pound test weight assembly Due
9. uted 2 1 8 in 5 40 cm 3 1 4 in 2 1 4 in 8 25 cm 5 72 cm DIMENSIONING FOR MODEL 6105 ELECTRODES SURFACE RESISTIVITY NOMOGRAPH 107 102 1 2 4 1010 1078 n 9 53 36 Y ohms pde I AS 10 v d O ss gt lt 9 A 3 10 o 107 lt gt gt 10 lt EXAMPLE z 200 volts 3 0x 10 amps gt uu aa ren A 3 56x10 oh Ce ea Pr O s AE S 2 Sw o SE a Nn 7 5 w eo 10 a aL A aa 10 5 Mi W 7 3 al g 1014 bl OF er w lt ee 2 gt Si 1015 107 500 1016 1000 107 2 101 VOLTAGE RESISTIVITY CURRENT VOLUME RESISTIVITY NOMOGRAPH 10 1000 10 4 2 y 9 5229 Y ohm cm Aita A 10 TOS ope ep EE ee pai Emo aia E 9 10 o 100 101 1o r U gt gt wn EXAMPLE E lt i 0 2 0 15 cm sample 200volts s 10 a 6 0 x10 amps zZ a zZ V se 4 sa Pv 5 09x10 ohm cm o s 100 S 10 2 _ 0 3 wa ro a 10 gt an os lt 10 gt mn lt R 2 04 gt m 19 10 0 5 z 9 0 6 z hd 1077 RESISTIVITY 0 7 THICKNESS VOLTAGE CURRENT SECTION 3 3 1 VOLUME RESISTIVITY The ASTM Standard states that volume resistivity 9 shall be calculated as follows where R is the volume resistance in ohms measured as specified in the publication t is the average thickness of the sample A is the effective area of the guarded electrode for the particular electrode arrangement employed For the Model 6105 which uses circular electrodes A is 2

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