Keithley_2000calib 电路图.pdf

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1、Model 2000Multimeter Calibration Manual A G R E A T E RM E A S U R E O F C O N F I D E N C E 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 3 years from date of shipment. Keithley Instruments, Inc.

2、 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 defec- tive. To exercise this warranty, write or call

3、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. Re

4、paired 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 product or part. This warran

5、ty also does not apply to fuses, software, non-recharge- able batteries, damage from battery leakage, or problems arising from normal wear or failure to follow instruc- tions. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR

6、 FITNESS FOR A PARTICULAR USE. THE REMEDIES PROVIDED 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 INSTRUMENTS AND SOFTWAR

7、E EVEN IF KEITHLEY INSTRUMENTS, INC., HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES. SUCH EXCLUDED DAM- AGES 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 Instruments,

8、 Inc. 28775 Aurora Road Cleveland, OH 44139 440-248-0400 Fax: 440-248-6168 BELGIUM:Keithley Instruments B.V. Bergensesteenweg 709 B-1600 Sint-Pieters-Leeuw 02/363 00 40 Fax: 02/363 00 64 CHINA:Keithley Instruments China Yuan Chen Xin Building, Room 705 12 Yumin Road, Dewai, Madian Beijing 100029 861

9、0-62022886 Fax: 8610-62022892 FRANCE:Keithley Instruments Sarl 3, alle des Garays 91127 Palaiseau Cedex 01-64 53 20 20 Fax: 01-60 11 77 26 GERMANY:Keithley Instruments GmbH Landsberger Strasse 65 82110 Germering 089/84 93 07-40 Fax: 089/84 93 07-34 GREAT BRITAIN:Keithley Instruments Ltd The Minster

10、58 Portman Road Reading, Berkshire RG30 1EA 0118-9 57 56 66 Fax: 0118-9 59 64 69 INDIA:Keithley Instruments GmbHFlat 2B, WILOCRISSA 14, Rest House Crescent Bangalore 560 001 91-80-509-1320/21 Fax: 91-80-509-1322 ITALY:Keithley Instruments s.r.l. Viale S. Gimignano, 38 20146 Milano 02-48 39 16 01 Fax

11、: 02-48 30 22 74 NETHERLANDS:Keithley Instruments B.V. Postbus 559 4200 AN Gorinchem 0183-635333 Fax: 0183-630821 SWITZERLAND:Keithley Instruments SA Kriesbachstrasse 4 8600 Dbendorf 01-821 94 44 Fax: 01-820 30 81 TAIWAN:Keithley Instruments Taiwan 1 Fl. 85 Po Ai Street Hsinchu, Taiwan, R.O.C. 886-3

12、572-9077 Fax: 886-3572-903 9/00 RadioFans.CN 收音机爱 好者资料库 Model 2000 Multimeter Calibration Manual 1994, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Third Printing January 2001 Document Number: 2000-905-01 Rev. C RadioFans.CN 收音机爱 好者资料库 Manual Print History The print histor

13、y shown below lists the printing dates of all Revisions and Addenda created for this manual. The Revision Level letter increases alphabetically as the manual undergoes sub- sequent updates. Addenda, which are released between Revisions, contain important change in- formation that the user should inc

14、orporate 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 into the new Revision of the manual. Each new Revision includes a revised copy of this print history page. Revisio

15、n A (Document Number 2000-905-01).November 1994 Addendum A (Document Number 2000-905-02).June 1995 Revision B (Document Number 2000-905-01).June 2000 Revision C (Document Number 2000-905-01).January 2001 All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc.

16、 Other brand names are trademarks or registered trademarks of their respective holders. Safety Precautions The following safety precautions should be observed before using this product and any associated in- strumentation. Although some instruments and accessories would normally be used with non-haz

17、ardous voltages, there are situations where hazardous conditions may be present. This product is intended for use by qualifi ed personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury. Read the operating information carefully before using

18、the product. The types of product users are: Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the equipment is operated within its specifi cations and operating limits, and for ensuring that operators are adequately trained. Operator

19、s use the product for its intended function. They must be trained in electrical safety procedures and proper use of the instrument. They must be protected from electric shock and contact with hazardous live circuits. Maintenance personnel perform routine procedures on the product to keep it operatin

20、g, for example, setting the line voltage or replacing consumable materials. Maintenance procedures are described in the manual. The procedures explicitly state if the operator may perform them. Otherwise, they should be performed only by service personnel. Service personnel are trained to work on li

21、ve circuits, and perform safe installations and repairs of prod- ucts. Only properly trained service personnel may perform installation and service procedures. Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable con- nector jacks or test fi xtures. The Ame

22、rican National Standards Institute (ANSI) states that a shock haz- ard exists when voltage levels greater than 30V RMS, 42.4V peak, or 60VDC are present. A good safety practice is to expect that hazardous voltage is present in any unknown circuit before measuring. Users of this product must be prote

23、cted from electric shock at all times. The responsible body must en- sure that users are prevented access and/or insulated from every connection point. In some cases, con- nections must be exposed to potential human contact. Product users in these circumstances must be trained to protect themselves

24、from the risk of electric shock. If the circuit is capable of operating at or above 1000 volts, no conductive part of the circuit may be exposed. As described in the International Electrotechnical Commission (IEC) Standard IEC 664, digital multi- meter measuring circuits (e.g., Keithley Models 175A,

25、 199, 2000, 2001, 2002, and 2010) are Installation Category II. All other instruments signal terminals are Installation Category I and must not be connect- ed to mains. Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance limited sources. N

26、EVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective devices to limit fault current and voltage to the card. Before operating an instrument, make sure the line cord is connected to a properly grounded power re- ceptacle. Inspect the connec

27、ting cables, test leads, and jumpers for possible wear, cracks, or breaks be- fore each use. For maximum safety, do not touch the product, test cables, or any other instruments while power is ap- plied to the circuit under test. ALWAYS remove power from the entire test system and discharge any capac

28、itors before: connecting or disconnecting cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers. Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth) ground

29、. Always make measurements with dry hands while standing on a dry, insulated surface ca- pable of withstanding the voltage being measured. The instrument and accessories must be used in accordance with its specifi cations and operating instructions or the safety of the equipment may be impaired. Do

30、not exceed the maximum signal levels of the instruments and accessories, as defi ned in the specifi cations and operating information, and as shown on the instrument or test fi xture panels, or switching card. When fuses are used in a product, replace with same type and rating for continued protecti

31、on against fi re hazard. Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth ground connections. If you are using a test fi xture, keep the lid closed while power is applied to the device under test. Safe operation requires the use of a lid interlo

32、ck. If a screw is present, connect it to safety earth ground using the wire recommended in the user documen- tation. The symbol on an instrument indicates that the user should refer to the operating instructions located in the manual. The symbol on an instrument shows that it can source or measure 1

33、000 volts or more, including the com- bined effect of normal and common mode voltages. Use standard safety precautions to avoid personal contact with these voltages. The WARNING heading in a manual explains dangers that might result in personal injury or death. Always read the associated information

34、 very carefully before performing the indicated procedure. The CAUTION heading in a manual explains hazards that could damage the instrument. Such damage may invalidate the warranty. Instrumentation and accessories shall not be connected to humans. Before performing any maintenance, disconnect the l

35、ine cord and all test cables. To maintain protection from electric shock and fi re, replacement components in mains circuits, including the power transformer, test leads, and input jacks, must be purchased from Keithley Instruments. Standard fuses, with applicable national safety approvals, may be u

36、sed if the rating and type are the same. Other components that are not safety related may be purchased from other suppliers as long as they are equivalent to the original component. (Note that selected parts should be purchased only through Keithley Instruments to maintain ac- curacy and functionali

37、ty of the product.) If you are unsure about the applicability of a replacement component, call a Keithley Instruments offi ce for information. To clean an instrument, use a damp cloth or mild, water based cleaner. Clean the exterior of the instrument only. Do not apply cleaner directly to the instru

38、ment or allow liquids to enter or spill on the instrument. Prod- ucts that consist of a circuit board with no case or chassis (e.g., data acquisition board for installation into a computer) should never require cleaning if handled according to instructions. If the board becomes contami- nated and op

39、eration is affected, the board should be returned to the factory for proper cleaning/servicing. ! Rev. 10/99 Table of Contents 1 Performance Verifi cation Introduction.1-2 Verifi cation test requirements.1-3 Performing the verifi cation test procedures.1-6 Verifying DC voltage.1-7 Verifying AC volta

40、ge .1-8 Verifying DC current .1-10 Verifying AC current.1-11 Verifying resistance .1-12 2 Calibration Introduction.2-2 Environmental conditions.2-3 Calibration considerations.2-4 Calibration code.2-5 Comprehensive calibration.2-6 Front panel calibration.2-7 SCPI command calibration.2-14 3 Calibratio

41、n Command Reference Introduction.3-2 Command summary.3-4 Miscellaneous calibration commands.3-6 DC calibration commands .3-10 AC calibration commands .3-16 Manufacturing calibration .3-18 Bus error reporting.3-19 Detecting calibration step completion.3-20 A Specifi cations Accuracy calculations.A-7

42、Optimizing measurement accuracy.A-10 Optimizing measurement speed.A-11 B Error Messages C Calibration Program List of Illustrations 1 Performance Verifi cation Connections for DC volts verifi cation.1-7 Connections for AC volts verifi cation.1-8 Connections for DC current verifi cation.1-10 Connections for AC current verifi cation.1-11 Connections for resistance ver