KEI 2304A User 电路图.pdf

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1、Model 2304A High Speed Power Supply Users 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 1 year from date of shipment. Keithley Instrumen

2、ts, 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 warranty, write or

3、 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 pre- paid, to the indicated service facility. Repairs will be made and the product returned, transportation pre

4、paid. 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 product or part. Thi

5、s 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 OF MERCHANTABILIT

6、Y OR 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 SOF

7、TWARE 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 Instrume

8、nts, Inc. 28775 Aurora Road Cleveland, OH 44139 440-248-0400 Fax: 440-248-6168 CHINA:Keithley Instruments China Yuan Chen Xin Building, Room 705 12 Yumin Road, Dewai, Madian Beijing 100029 8610-62022886 Fax: 8610-62022892 FRANCE:Keithley Instruments SARL BP 60 3 Alle des Garays 91122 Palaiseau Cdex

9、33-1-60-11-51-55 Fax: 33-1-60-11-77-26 GERMANY:Keithley Instruments GmbH Landsberger Strasse 65 D-82110 Germering, Munich 49-89-8493070 Fax: 49-89-84930759 GREAT BRITAIN:Keithley Instruments, Ltd. The Minster 58 Portman Road Reading, Berkshire RG30 1EA 44-118-9575666 Fax: 44-118-9596469 ITALY:Keithl

10、ey Instruments SRL Viale S. Gimignano 38 20146 Milano 39-2-48303008 Fax: 39-2-48302274 NETHERLANDS:Keithley Instruments BV Avelingen West 49 4202 MS Gorinchem 31-(0)183-635333 Fax: 31-(0)183-630821 SWITZERLAND:Keithley Instruments SA Kriesbachstrasse 4 8600 Dbendorf 41-1-8219444 Fax: 41-1-8203081 TA

11、IWAN:Keithley Instruments Taiwan 1FL., 85 Po Ai Street Hsinchu, Taiwan 886-3-572-9077 Fax: 886-3-572-9031 1/99 RadioFans.CN 收音机爱 好者资料库 Model 2304A High Speed Power Supply Users Manual 1998, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Second Printing, March 1999 Document N

12、umber: 2304A-900-01 Rev. B 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 created for this manual. The Revision Level letter increases alphabetically as the manual undergoes sub- sequent updates. Addenda, which are rel

13、eased between Revisions, contain important change in- formation 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 into the new Revision of t

14、he manual. Each new Revision includes a revised copy of this print history page. Revision A (Document Number 2304A-900-01) .January 1998 Revision B (Document Number 2304A-900-01) .March 1999 All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc. Other brand

15、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 instrumen- tation. Although some instruments and accessories would normally be used with non-hazardous voltag

16、es, 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 the product.

17、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. Operators use the pro

18、duct 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 operating, for exampl

19、e, 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 ser- vice personnel. Service personnel are trained to work on live circuits

20、, and perform safe installations and repairs of products. 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 connector jacks or test fi xtures. The American National

21、Standards Institute (ANSI) states that a shock hazard 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 protected from electri

22、c shock at all times. The responsible body must ensure that users are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential human contact. Product users in these circumstances must be trained to protect themselves from the risk of elec

23、tric 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 multimeter measuring circuits (e.g., Keithley Models 175A, 199, 2000, 2001, 2002,

24、 and 2010) are Installation Category II. All other instruments signal terminals are Installation Category I and must not be connected to mains. Do not connect switching cards directly to unlimited power circuits. They are intended to be used with imped- ance limited sources. NEVER connect switching

25、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 receptacle. Inspect the connecting cables, test leads,

26、and jumpers for possible wear, cracks, or breaks before each use. For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or d

27、isconnecting 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. Always make measurements wi

28、th 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 not exceed the maximum signal

29、 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 protection against fi re hazard. Chas

30、sis 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 interlock. If a screw is present, co

31、nnect 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 1000 volts or more, including

32、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 very carefully before perfor

33、ming 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 line cord and all test cables.

34、 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 used if the rating and type ar

35、e 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 accu- racy and functionality of the product.) If you ar

36、e 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 instrument or allow liquids to ente

37、r or spill on the instrument. Products 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 contaminated and op- eration is affected, the board

38、should be returned to the factory for proper cleaning/servicing. ! Rev. 2/99 Table of Contents 1General Information Introduction . 1-2 Warranty information . 1-2 Manual addenda . 1-2 Safety symbols and terms . 1-2 Specifi cations . 1-3 Inspection . 1-3 2Front Panel Operation Power supply overview .

39、2-2 Power-up . 2-4 Line power connection . 2-4 Fuse replacement . 2-5 Power-up sequence . 2-5 Default settings . 2-6 Display types . 2-7 Remote display option . 2-8 Test connections . 2-8 Setting voltage and current values . 2-9 Procedure to edit voltage and current values . 2-9 OPERATE . 2-10 Outpu

40、t readback . 2-11 Current limit . 2-11 Enhanced output response . 2-12 Independent voltage measurements (DVM) . 2-12 Pulse-current measurements . 2-12 Pulse current digitization . 2-14 Programming examples . 2-15 Pulse-current measurement procedure . 2-16 Determining correct trigger level . 2-16 Lon

41、g integration current measurements . 2-17 Long integration measurement procedure . 2-19 Determining correct trigger level . 2-19 Sink operation . 2-20 Relay control . 2-21 Connections . 2-22 Controlling the relays . 2-23 MENU . 2-24 Rules to navigate MENU . 2-25 MENU structure . 2-25 3GPIB Operation Introduction . 3-2 GPIB bus connections . 3-2 Primary address .