KEI 486, 487 Instruction 电路图.pdf

《KEI 486, 487 Instruction 电路图.pdf》由会员分享，可在线阅读，更多相关《KEI 486, 487 Instruction 电路图.pdf（232页珍藏版）》请在收音机爱好者资料库上搜索。

1、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. Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargea

2、ble batteries, diskettes, and documentation. During the warranty period, we will, at our option, either repair or replace any product that prows to be defective, To exercise this wammty, write or call your local Keithley representative, or contact Keithley headquarters in Cleveland, Ohio. You will b

3、e 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 original warranty period, OT at le

4、ast 90 days. LIMITATION OF WARRANTY This warranty does not apply to defects resulting from product modification without Keithleys 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,

5、01 problems arising from normal we.a or failure to follow instructions. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. THE REMEDIES PRO- VIDED HEREIN ARE BUYERS SOLE AND EXCLUSIVE REMEDIES. NE

6、ITHER KBITHLEY 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 INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS, INC., HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES.

7、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. Keithley Instruments, Inc. - 28775 Aurora R RadioFans.CN 收音机爱 好者资料库 Model 486 Picoammeter Model 487 Picoammeter/Vokage Sour

8、ce Instruction Manual 01990, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Fourth Printing, August 2000 Document Number: 486-901-01 Rev. D RadioFans.CN 收音机爱 好者资料库 Manual Print History The print history shown below lists the printing dates of all Revisions and Addenda create

9、d for this manual. The Revision Level letter increases alphabetically as the manual undergoes subsequent updates. Addenda, which are released between Revisions, contain important change information that the user should incorporate immediately into the manual. Addenda are numbered sequentially. When

10、a new Revision is created, all Addenda associated with the previous Revision of the manual arc incorporated into the new Revision of the manual. Each new Revision includes a revised copy of this print history page. Revision C (Document Number 486-901-01) . December 1991 Revision D (Document Number 4

11、86-901-01). . August 2000 BESCHEJNIGUNG DES HERSTELLERS/IMlORTEURS Hiermitwirdbescheinigt,(daS)/dasMODEL 486 PICOAMMETER AND MODEL 487 PICOAMMETER/ VOLTAGE SOURCEinUbereinstimmungmitdenBestimmungenderVfg1046/1984funksntstortist.DerDeuken Bundespost wurde das Inverkehrbringen dieses Gerates angezeigt

12、 und die Berechtigmg ZUI Uberprufmg der Serie auf Eiihmg der Bestimmungen eingeraumt. Die Einhaltung der betreffenden Bestimmungen setzt vordus, dag, (da data store, data recall, I-limit (Model487), integration, IEEE-488 bus Coos or talk-only), defaults, self digital, analog, or digital + analog. RE

13、L Use to establish a baseline using the displayedread- ing. V RANGE A: Use range keys to select a lower or higher current range. SHm AUTO RANGE: Use to enable/disable autorange. SETLIP: Use with knob or cursor keys to conure the fol- lowingtriggersetupitems;triggermode,triggerinterval, trigger delay

14、, and bigger source. OPERATE: Places V-Source of Model 487 in operate or standby. TRIGGEE Press to trigger a reading or start the data store. PRESET: Toggles between two preset V-Source values (Model 487 only). SHIFT OHMS cV/Ij: Press to select V/I Ohms. TYPICAL CONNECTIONS (Model 487 shown connecte

15、d to Model 8CKQA test fixture) TL HI - 487 LO T “-so”rcw 0 A LO 487 Plcoammeter i Equivalent circuit Model 8002A CONSIGhTS DE SECURITF! n faut prendre les pr mm digital, analog cder digital und analog. REL (R. Trig mcdulo trig BASIC RULES CURRENT MEASUREMENTS. Current Ranges. Autorange Zero Check an

16、d Correct. Filters Rel. Current Measurements USING THE VOLTAGE SOURCE (Model 487) Test Fixture and Interlock Adjusting V-Source Level . . . . . . . . . . . . . . . . . 2-l . 2-l . 2-5 . 2-6 . 2-6 . 2-9 . 2-11 . 2-11 3-l 3-1 3-l 3-l 3-2 3-2 3-2 3-3 3-3 3-3 3-4 3-5 3-5 3-5 3-5 3-6 3-7 3-8 3-10 3-10 3-

17、11 3.6.3 3.6.4 3.6.5 3.6.6 3.7 3.8 3.8.1 3.82 3.8.3 3.8.4 3.8.5 3.8.6 3.8.7 3.8.8 3.8.9 3.8.10 3.9 3.9.1 3.9.2 3.9.3 3.9.4 3.9.5 3.10 3.10.1 3.102 3.11 3.11.1 3.112 3.11.3 3.12 3.13 3.14 3.14.1 3.14.2 3.15 3.15.1 3.15.2 3.16 3.16.1 3.16.2 3.16.3 3.16.4 3.16.5 3.16.6 3.16.7 3.16.8 Preset . I-Limit .

18、Operate . Basic V-Source Operating Procedure. . V/I OHMS MEASUREMENTS (Model 487) . MENU . DataStore . DataRecall . I-Limit(Model487) . Integration . IEEE-488AddressorTalk.Only . Defaus . Self-Test . Debug . Calibrate . CalVSRC(Mode1487) . FRONTPANELTRIGGERING . TriggerMode . TriggerInterval. . Trig

19、gerDelay . Trigger Sources . Trigger Examples . EXTERNAL TRIGGERING. . ExternalTrigger . Meter Complete . DATASTORE . Storing Data at Programmed Intervals, . Triggering One-shot Readings into Data Store . RecallingData . ANALOGOUTPUT . TALK-ONLY . OPERATINGEXAMPLES . Measuring Current Generated by a

20、n LED . Resistivity Tests (Model 487) . SOURCE VOLTAGE/MEASURE CURRENT (Model 487). . Basic Source V/Measure I Configuration. . Testing2-TerminalDevices . MEASUREMENT CONSIDERATIONS . Source Resistance. . SourceCapacitance . Triboelectric and Iiezoelectric Effects. . Electrostatic Interference. . Th

21、ermalEMFs . Electromagnetic Interference (EMI). . GroundLoops . Floating Measurements . 3-12 3-13 3-13 3-13 3-14 3-16 3-16 3-17 3-18 3-18 3-19 3-19 3-19 3-20 3-20 3-20 3-20 3-20 3-21 3-21 3-21 3-22 3-22 3-23 3-23 3-23 3-23 3-24 3-25 3-25 3-27 3-27 3-27 3-29 3-31 3-31 3-32 3-33 3-33 3-33 3-34 3-35 3-

22、35 3-35 3-35 3-36 SECTION 4 - IEEE-488 Reference 4.1 4.2 4.2.1 4.2.2 4.2.3 4.2.4 4.2.5 4.2.6 4.2.7 4.2.8 4.2.9 4.2.10 4.2.11 4.2.12 4.2.13 4.2.14 4.2.15 4.2.16 4.2.17 4.2.18 4.2.19 4.2.20 4.2.21 4.2.22 4.2.23 4.2.24 4.3 4.3.1 4.3.2 4.3.3 4.3.4 4.3.5 4.3.6 4.3.7 4.3.8 4.4 4.5 4.6 4.7 4.7.1 4.7.2 4.7.

23、3 4.8 INTRODUCTION . DEVICE-DEPENDENT COMMAND PROGRAMMING . A-Display Intensity . B-ReadingSource . C . Zero Check and Zero Correct. . D-Display. . F-V/IOhms . G-DataFormat . H-HitControl . J-Self-Tests. . K . EOI and Bus Hold-Off. . . L-Default Condlhons or Calibration. . M - SRQ Mask and Serial Po

24、ll Byte Format . N-DDataStore;ArmandSetSize. . 0-Operate(Mode1487) . P-Filters . Q-Interval . R-Range . SIntegrationPeriod . T-Trigger . u-status . V-VoltageSource . WDelay . X-Execute . Y-Terminator . Z-Relative . GENERAL BUS COMMANDS. . REN(RemoteEnable) . IFC (InterfaceClear) . LLO(LocalLockout)

25、. GTL (Go To Local) and Local . DCL(DeviceClear) . SDC(SelectiveDeviceClear) . GET (Group Execute Trigger) . SPE, SPD (Serial Polling) . IEEE-488BUSCONNECTIONS . PRIMARY ADDRESS SELECTION . CONTROLLER PROGRAMMING . FRONT PANEL ASPECTS OF IEEE-488 OPERATION . Front PanelError Messages . IEEE-488 Stat

26、us Indicators. . LOCALKey . BUS DATA TRANSMISSION TIMES . 4-l 4-1 4-6 4-7 4-8 4-9 4.10 4-11 4-15 4-16 4-17 4.19 4-21 4-24 4.26 4-27 4-28 4-29 4-30 4.31 4-32 4-38 4-39 4-40 4-41 4-42 4-44 4-44 4-44 4-45 4-45 4-45 4-45 4-45 4-46 4-46 4-47 4-48 4-48 4-48 4-50 4-51 4-51 SECTION 5 - Performance Verificat

27、ion 5.1 INTRODUCTION . 5.2 ENVIRONMENTALCONDITIONS . 5.3 INITIALCONDITIONS . 5.4 REQUIREDTESTEQUIPMENT . 5.5 VERIFICATION PROCEDURES . 5.5.1 PicoammeterVerication. . 5.5.2 Voltage Source Verification (Model 487). . SECTION 6 - Theory of Operation 6.1 INTRODUCTION 6.2 ANALOG CIRCUITS. 6.2.1 Input Amp

28、lifier. 6.2.2 Analog Filter 6.2.3 Multiplexer . ._. ., ., ,., ._, ,_ 6.2.4 +2.8V Reference 6.2.5 Analog Output 6.2.6 Voltage Source (Model 487). 6.3 ANALOG CONTROL CIRCUITRY. 6.4 A/D CONVERTER 6.5 DIGITAL CIRCUITS 6.5.1 Digital Block Diagram. 6.5.2 Microcomputer 6.5.3 Display/Keyboard. 6.5.4 IEEE-488 Interface . 6.6 POWER SUPPLIES 6.6.1 ACLineInput. 6.6.2 *15V Supplies 6.6.3 +5VA Supply. . 6.6.4 +6.5V Supply. . . . . . SECTION 7 - Maintenance 7.1 INTRODUCTION . . . . . . . . . .