KEI 6105 instruction 电路图.pdf

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1、Model 6105 Resistivity Adapter Instruction Manual Contains Operating and Servicing Information Publication Date: October 1972 Document Number: 31415 RadioFans.CN 收音机爱 好者资料库 WARRANTY Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 1

2、 year from date of shipment. Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rcchargcablc baitcries, diskettes, and documentation. During the warranty period, we will, at our option, cithcr repair or replace any product that proves to be

3、 defective. To exercise this warranty, write or call your local Keithley representative, or contact Keithley headquarters in Cleveland, Ohio. You will bc given prompt assistance and rctum instructions. Send the product, transpot%tion prepaid, to the indicated service facility. Repairs will be made a

4、nd the product returned, transportation prepaid. Repaired or replaced products are warranted for the balance of the origi- “al warranty period, or at Icast 90 days. LIMITATION OF WARRANTY This warranty dots not apply to defects resulting from product modification without Keithleys express written co

5、nsent, 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 weas or failure to follow instructions, THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCL

6、UDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. THE REMEDIES PROVTDED HEREIN ARE BUYERS 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 ARI

7、SING 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 PERS

8、ON, OR DAMAGE TO PROPERTY RadioFans.CN 收音机爱 好者资料库 SECTION 1. GENERAL INFORMATION l-l. GENERAL. a. The Model 6105 Resistivity Adapter is a guarded te*t fixture for measuring volume and surface resis- tivities af materials when used with a regulated power supply and an eleccromecer. The complete sysc?

9、m per- mits measurement of volume resistivicy from 10 c0 3 x 1019 ohm-cm and surface resiscivicy from lo3 co 5 x 1018 ohms, in accordance with procedures of cbe American Society far Testing and Materials. The Adapter can accommadace samples up co 4 inches in diameter and 114 inch chick with excitati

10、on voltages up to 1000 volt*. b. The Model 6105 has been designed c0 minimize measurement error. The electrode configurations con- form co the ASTM recommendations for measurement of electrical resisrance of insulating materials. The test sample is shielded co prevent stray pickup. The guard ring ci

11、rcuit is arranged c minimize ieakage currents from the measuring circuit. Uniform pressure is always applied over the measuring area, because the cesc sample is held beween the spring-loaded, guarded electrode and the e-pound cesc weight assembly. Due co these cansideracions, measurement accuracy de

12、pends primarily upon the accuracy of the voltage source and the electrometer. C. Recwmended inscrumencs for se with the Model 6105 are the Keichley Model 240A Regulated High Volt- age Supply and the Keichley Model 610C Multi-Range Electrometer. The Model 240A provides excicacion volcages up c 1200 v

13、olts in calibrated one-volt steps. Ifs oufput is accurate within 1%. The Model 61OC pro- vides direct reading current ranges c lo-l4 ampere full scale. Its accuracy is fZ% of full scale f 10-11 ampere, and f4% of full scale beyond. Although the Model 240A and the Model 610C are the reccmmended instr

14、uments for se with the Resistivity Adapter, the Model 6105 is compatible vich.all Keithley high voltage supplies and electrometers. SAMPLE SIZE: Maximum: 4-inch diameter (10.2-a diameter) Minimum: Z-l/Z-inch diameter (6.3-cm diameter) SAMPLE THICKNESS: l/l6 inch co 114 inch (0.159 cn to 0.635 cm). T

15、EST VOLTAGE i acetate rayon gloves are recomended. For best results, clean the sample sur- faces with an alcohol and ether mixture orother suit- able solvent. a. Volume Resisrivity Measurements. Place the short circuit plug oer the upper wo jacks, leaving VOLITME clearly visible. Inserf the banana p

16、lug from the fest weight assembly into the bottom jack. Close the Model 6105 cover. An interlock switch disconnecrs the potential to the sample if the coer is opened. Apply the power supply voltage. Read the current on the electrometer. The value of the volume resisrivity p, is found through one of

17、the following calculations: 3.53 v p = x ohm-inches I _ 22.9 v % 1 ohm-centimeters where p is the volume resistivity of the sample; V is the applied voltage from rhe parer supply b. Surface Resisrivicy Measurements. Place the short circuit slug over the lower two iacks, leavina SURFACE cle V is the

18、applied voltage from the power supply in volts; I is rhe cu+rent reading from the electrometer. 2-2. CONNECTIONS. Connect the power supply to the uhf-type recepracle. Connect the electrometer to the bnc-type receptacle. Place rhe sample under the test weight as shown in Figure 5. The sample thicknes

19、s should be between l/l6 and 114 inch (0.159 and 0.635 cm). The diameter should be beween 2-l/2 and 4 inches (6.29 and 10.2 cm). 2-3. PROCEDURE. The Model 6105 Demits eas measue- in volts; menc Of a sample. The test sample is placedabeween ti is the average thickness of the sample in the two electro

20、des; the desired test potential is inches; selected from the voltage supply and the current pass- tc is the average thickness of the sample in ing through the test sample is measured by the elec- centimeters; trometer . From readings from the voltage supply and I is the current reading from the elec

21、rrmerer. the electrometer, the resistiviries can be computed. I 1 118 in. .31 cm. I FIGURE 3. DIMENSIONING FOR MODEL 6105 ELECTRODES 2 SURFACE VOLTAGE .r RESISTIVITY NOMOGRAPH RESISTIVITY NOMOGRAPH - 100 100 2- i i 1 = 100 100 p, : 53.36 y I ohms z = 10” 0 1 - 102 EXAMPLE: 200 “ds 3.0 x lO%mps 2 - ,

22、O, = 3.56.10”ohm, ;i ; 103 _ z _A- .ly- _- _*- _*- ” 2 10” _- !s - 105 = 106 106 2 10” 10” RESISTIVITY RESISTIVITY 3 lo- e 10-a y lo-” - 10-12 CURRENT VOLUME RESISTIVITY NOMOGRAPH lo9 I RESISTIVITY - 10-12 - 10-l .-_ = 10-10 kc 5 z i 5 - 10-q 2 s l-i = 10-e 2-3 10-T THICKNESS VOLTA1 GE CURRENT SECTI

23、ON 3. THEORY OF OPERATION 3-l. VOLUME RESISTIVITY. The ASTM Standard* states that volume resistivity, o, shall be calculated as follows: where K 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 guard

24、ed electrode for the particular elecmode arrangement employed. For the Model 6105, which uses circular electrodes, A is IT2 A=$. where Do is the dimension indicated in Figure 3. For the Model 6105, Do is equal to Z-118 inches or 5.40 cm. VOLUME 3-2. SURFACE KESISTIITY. The ASTM Standard* states that

25、 surface resistivity, s, shall be calculated as follows: where R is the surface resistance, in ohms, measured as specified in tle publication; g is the distance between the electrodes; P is the effective perimeter of the guarded electrode for the particular electrode arrangemenr employed. For the Mo

26、del 6105, which uses circular electrodes, P, is P = Do r where Do is the dimensjon indicated in Figure 3. FIGUP.% 4. OLum RESISTIVITY FIGURE 5. SOWACE RESISTIVITY *American Society for Testing and Materials, Standard Methods of Test for Electrical Resistance of Insul- acing Materials, ASTM Designati

27、on D257-66 4 SECTION 4. MAINTENANCE ReSiSti”ity Adapter 80164 wade1 6105 . Test Weight Assembly 80164 15702A 1 Test Weight, Stainless Steel 80164 16371A 2 . Handle Assembly 80164 16231A 3 Test Lead Assembly 80164 157063 4 Banana Pl.“g 108-303 74970 Lx-5 5 FE fener , Thumb-screw 80164 SK-4 6 Banana J

28、ack (3 rcqd.) 108-901 7497 W-6 chard Ring 80164 1637OPx 8 . Guard Ring Insulator 80164 15708A Test Plate Assembly 80164 15709B Test Plate 80X4 36369A 9 Receptacle, bnc &ate of bnc receptacle) 31-221 02660 cs-15 31-002 02660 cs-44 10 Receptacle, uhf, Mil. x0. so-239 im of uhf receptacle, Mil. NO. 49190 6804 91737 cs-64 5127 91737 c-49 II ildifed Short circuit Plug 80164 23443A Test Instrumentation Group Keithley Instruments, Inc. 20775 Aurora Road Cleveland, Ohio 44139 Printed in the tJ.S.A