KEI 7011-C, 7011-S Instruction 电路图.pdf

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1、Instruction Manual Models 7011 -S and 701 I-C Quad 1 x 10 Multiplexer Cards Contains Operating and Servicing Information 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 year from date of shipment.

2、 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, either repair or replace any product that proves to be defective. To exercise this

3、 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, t

4、ransportation prepaid. Repaired or replaced products are warranted for the balance of the original warranty period, or at least 90 days. LIMITATION OF WARRANTY This warranty does not apply to defects resulting from product modifi cation without Keithleys express written consent, or misuse of any pro

5、duct 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 WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY

6、OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. THE REMEDIES PRO- VIDED HEREIN ARE BUYERS SOLE AND EXCLUSIVE REMEDIES. NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS

7、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 LIM- ITED TO: COSTS OF REMOVAL AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON, OR DAMAGE TO PROPERTY

8、. Keithley Instruments, Inc. 28775 Aurora Road Cleveland, Ohio 44139 440-248-0400 Fax: 440-248-6168 1-888-KEITHLEY (534-8453) Sales Offi ces:BELGIUM:Bergensesteenweg 709 B-1600 Sint-Pieters-Leeuw 02-363 00 40 Fax: 02/363 00 64 CHINA:Yuan Chen Xin Building, Room 705 12 Yumin Road, Dewai, Madian Beiji

9、ng 100029 8610-6202-2886 Fax: 8610-6202-2892 FINLAND:Tietjntie 2 02130 Espoo Phone: 09-54 75 08 10 Fax: 09-25 10 51 00 FRANCE:3, alle des Garays 91127 Palaiseau Cdex 01-64 53 20 20 Fax: 01-60 11 77 26 GERMANY:Landsberger Strasse 65 82110 Germering 089/84 93 07-40 Fax: 089/84 93 07-34 GREAT BRITAIN:U

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12、1 94 44 Fax: 01-820 30 81 TAIWAN:1FL., 85 Po Ai Street Hsinchu, Taiwan, R.O.C. 886-3-572-9077 Fax: 886-3-572-9031 Copyright 2001 Keithley Instruments, Inc. Printed in the U.S.A. 11/01 RadioFans.CN 收音机爱 好者资料库 Models 7011 -S and 7011 -C Instruction Manual 01991, Keithley Instruments, Inc. Test Instrum

13、entation Group All Rights Reserved Cleveland, Ohio, U. S. A. RadioFans.CN 收音机爱 好者资料库 Manual Print History The print histoxy shown below lists the printing dates of all Revisions and Addenda created for this manual. The Revision Level letter increases alphabetically as the w undergoes subsequent upda

14、tes. Addenda, which are released between Revisions, contain important change information that the user should incorporate immediately into the manual. Addenda are numbered sequentially. When a new Revision is created, all Addenda associated with the previous Revision of the manual are incorporated i

15、nto the new Revision of the manual. Each new Revi- sion includes a revised copy of this print history page. R the Model 7011-S and the Model 7011-C. The Model 7011-S assembly consists of a screw terminal connector card and a relay card. External test circuits are wired directly to the saew terminals

16、 of the connector card. Also available from Keithley is the Model 7011-ST. This is an extra screw terminal connector card. With an extra connector card, you can wire a second test system without disturbing the wiring conuration of the first test system. The Model 7011-C assembly consists of a multi-

17、pin bmss te rmination) connector card and the relay card. Fxtemal test circuit connedions to the multiplexer are made via the 96-pin male DIN connector on the con- nector card. Keithley offers a variety of optional acces- sories that can be used to make conneciiom to the connector card (see paragrap

18、h 1.9). The rest of Setion 1 is arranged in the following man- ner: 1.2 Features 1.3 warranty information 1.4 Manual addenda 1.5 Safety symbols and terms 1.6 Specifications 1.7 Unpacking and inspection 1.8 Repacking for shipment 1.9 Optional accessories 1.2 Features The Model 7011 is a low voltage,

19、two-pole, quad, 1 x 10 multiplexer card. Some of the key features in quad 1 x 10 con+ra- tion, dual 1 x 20 configuration and single 1 x 40 cotiguration. The significance of the backplane jumpers is also covered here. Typical multiplex switching schemes: Explains some of the basic ways a multiplexer

20、cam be used to source or measure. Covers single-ended switching, differential (floating) switching and sensing. 24 System expansion: Discusses the various config- urations that are possible by using multiple cards. 2.2 Basic multiplexer configurations A simplified schematic of the Model 7011 multipl

21、exer is shown in Figure 2-l. It is organized as four 1 x 10 multiplexer banks. Each bank has 10 inputs and one output. Two-pole switching is provided for each multi- plexer input, with HI and LO switched. Two or more banks can be jumpered together to expand multiplexer inputs, and backplane jumpers

22、provide bank connec- tions to a second card installed in Model 7001 main- frame. 2-l Bank to Bank Jumpers Backplane Jumpers (to 7001 Analog Backplane) Figure 2-l Mode/ 707 7 simplified schematic 2.2.1 Multiplexer bank-to-bank jumpers Jumpers are installed on the connector card to connect multiplexer

23、 banks together to form a multiplexer of 1 x 40. Each jum: :- set connects two adjacent banks to- gether. These j;-nper sets are included with the Model 7011. The bank-to-bank jumpers allow you to configure the multiplexer card in a variety of ways. Typical multi- plexer coniigwations include: l Fou

24、r 1 x 10 rxtitiplexers; no jumpers installed (Fig- ure 2-2). l Two 1 x 20 multiplexers; Bank A jumpered to Bank B, Bank C jumpered to Bank D (Figure 2-3). l One 1 x 40 multiplexer; all bank-to-bank jumpers installed (Figure 2-4). Other combinations are possible, including multiplex- ers of various s

25、izes (in multiples of 10 channels). For example, you could install jumpers to configure the card as one 1 x 30 and one 1 x 10 multiplexer. Refer to Section 3 for information on installing bank-to- bank jumpers. 2-2 * 2 Bank A 12 10. , Bank B Bank C 1. . Bank D ,I i -z+O”,utD 10, , Figure 2-2 Four 1

26、x 10 multiplexer configuration (jumpers not installed) 1. ,x2 . Bank 6 . 109 ,x2 l 1. ,z2 . Bank C . 10. :2 l 1. ,*2 . Bank D . 10. ,*2 l Figure 2-3 Two 7 x 20 multiplexer configuration (jumpers installed) 2-3 inputs 10 , Bank A 10. , ,: ;I- Output A 1. ,*2 Bank B Jumpers 10. ;2 1. ;2 Bank C Jumpers

27、 10. ./Z 1. ,2 Bank D JUllpS 100 ,2 One 1 x 40 multiplexer configuration (jumpers installedl 2-4 2.2.2 Backplane jumpers The three-pole analog backplane of the Model 7001 nminframe is shown in Fieure 2-5. Throwh this analog backplane the banks of a kodel7011 muitplexer car “:dos ( 1!1,1!3:1!11)” Not

28、ice that the colon (:) is used to separate the range hits. Eiti of the following statement5 will open channels l!?. .d 1!3 throl. l!ll: 0uTMlT 707; “mpen ( l!l, 1!3:1!11)” OUTPUT 707; “:opf?n alY Scanning channels There are many commands associated with scanning. However, it is possible to configure

29、 a scan using as llt- tie as four corNnan ds. These commands are listed as follows: 4-4 %ST :TRIGger:SEQuence:COLNt:ALITo ON” :ROUTe:SCAN clistz :DJIl- The first command resets the mainframe to a default scan configuration. The second command automatical- ly sets the channel count to the number of c

30、hannels in the Scan List, the third command defines the Scan List and the fourth command takes the Model 7001 out of the idle state. The following program will perform a single scan through all 40 channels of a multiplexer card installed in slot 1: 10 ouTI?uT 707; “%w 20 OUTPUT 707; “:“:scan (1!1:1!

31、40)” 40 0uTMlT707;“:ini 50 END Line 10 Selects a default conQuration for the scan. Lie 20 Set.5 ckannd count to the scan-list-length. Line30 Definesthescml.ist. Line 40 Take the Model 7001 out of the idle state. The scan is coniigmd to start as soon as this command is executed. When the above progra

32、m is run, the scan will be com- pleted in approximately 240 milliseconds (3msec delay for each relay close and a 3msec delay for each open), which is too fast to view from the front panel. An addi- tional relay delay can be added to the program to slow down the scan for viewing. The program is modif

33、ied by adding line 25 to slow down the scan. Also, Line 5 is added to the beginning of the program to ensure that all channels are open before the scan is started. 5 OUTPW 707; “:open alY 10 0IJTmT707;“*RsY 20 OUTPUT 707; “:trig:seq:coun:auto on” 25 OUTPUI 707; “:trigzdelO.Z5” 30 0uTruT707;“:scan (

34、1!1:1!40)” 40 0InPuT707; “:W 50 END Line5 opensallchanneL5. Line25 Sets a l/4 second delay after each channel closes. 4.4 Multiplexer switching examples This paragraph presents some typical applications for the Model 7011. These include resistor testing, transis- tor testing, and resistivity testing

35、, which shows how to use the Model 7011 with a matrix card (Model 7012). 4.4.1 Resistor testing The Model 7011 can be used to test a large number of resistors using only one test instnunent or group of in- struments. Such tests include two-wire and four-wire resistance measurements using a DMM, and

36、low-resis- tance measurements using a current source and sensi- tive digital voltmeter, as discussed in the following paragraphs. Two-wire resistance tests Figure 4-1 shows a typical test setup for making two- wire resistance measurements. The Model 7011 card provides the switching function, while t

37、he resistance mea.sUTements are made by a Model 199 DMM. Since only two-pole switching is required for this applica- tion, one Model 7011 card can be used to switch up to 40 resistors (additional multiplexer banks can be add- ed, if desired, by adding more cards). Accuracy of measurements can be opt

38、imized by mini- mizing sway resistance. Make connecting wires as short as possible to mini- mize path resistance. Another technique is to short one of the multiplexer inputs, close the shorted channel and then enable the DMM zero feature to cancel path resistance. Leave zero enabled for the entire t

39、est. 4-5 1 I I I I I I _I A. Test Configuration I I I I I I L-J L-l L-l 199 DMM 7011 Dlrr 8. Simplified Equivalent Circuit Figure 4-4 Z-wire resistance testing Four-wire resistc tests More precise measurements over a wider range of sys- tem and DIJT conditions can be obtained by using the four-wire

40、measurement scheme shown in Figure 45. Here, separate sense leads from the Model 196 DMM are routed through the multiplexer to the resistor un- der test. The extra set of sense leads minimizes the ef- fects of voltage drops amoss the test leads. Note, however, that an extra two poles of switching ar

41、e re- quired for each resiStor tested. For this reason, only 20 resistors per card can be tested using this configura- tiOIL The Model 7011 can be configured for 20 channels of 4 pole operation by isolating Banks A and B from Banks C and D, and by programming the Model 7001 main- frame for 4pole mod

42、e. The resulting pa no external wiring is necessary to connect the two cards together. In this application, the DUTs are connected to the bank inputs on the multiplexer card, allowing a large nun- her of DUTs to be switched through the matrix card. Also, the instruments are connected to the columns

43、on the matrix card. This particular configuration is best suited for applications requiring a large number of DIJTs to be connected to several insttuments. In other cases, the test coguration may call for a large num- her of instnunents and few DUTs. In those situations, the instruments would be con

44、nected to the multiplexer inputs, and the DUTs would be connected to the col- UItUlS. Figure 4-8 Typical common-emitter characteristics 4-11 Bkd.Jle Jumpers L- - -7()0, however, it can seriously degrade measure- ment accuracy when testing high-impedance devices. The voltage measured across such a de

45、vice, for exam- ple, can be substantially attenuated by the voltage di- vider action of the device source resistance and path isolation resistance, as shown in Figure 413. Also, leak- age currents can be generated through these resistanc- es by voltage sources in the system. _-_ - r-i r _ 1 I I I I

46、I I I I I I 1 I I I I I I I 1 L-J L-_-J l-Z-. Dur MUX Measure Card Instrument RDw = Source Resistance of DUT E em = Source EMF of DUT RpAm = Path Isolation Resistance RN = Input Resistance of Measuring Instrument Figure 4-12 Path isolation resistance 4-l 5 produced by various signals such as the AC

47、power line voltage. Large inductors such as power transformers can generate substantial magnetic fields, so care must be taken to keep the switching and maswing circuits a good distance away from these potential noise S0ll.K. At high current levels, even a single conductor can gen- EDUT bmi crate si

48、gnificant fields. These effects can be minimized UJT = ROUT + bm by using twisted pairs, which will cancel out most of the resulting fields. Any differatlal isolation capacitance a the conrwting cables. To minimize capacitance, keep all cables as short as possible 4.5.2 Magnetic fields 4.5.3 Radio f

49、requency interference RFI (Radio Frequency Interference) is a general term used to describe electromagnetic interference over a wide range of t%quencies across the spectrum. Such RFl can be particularly troublesome at low signal lev- els, but is can also affect measurements at high levels if the problem is of sufiicient severity. RFI can