KEI 228A INST 电路图.pdf

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1、Model 228AVoltage/Current Source Instruction 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 Instru

2、ments, 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

3、 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, transportation pr

4、epaid. 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. Th

5、is 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 MERCHANTABILI

6、TY 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 INSTRUMENTS AND

7、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. Keithley Instr

8、uments, 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 Beijing 100029 8610-6

9、202-2886 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:Unit 2 Commerce P

10、ark, Brunel Road Theale Berkshire RG7 4AB 0118 929 7500 Fax: 0118 929 7519 INDIA:Flat 2B, Willocrissa 14, Rest House Crescent Bangalore 560 001 91-80-509-1320/21 Fax: 91-80-509-1322 ITALY:Viale San Gimignano, 38 20146 Milano 02-48 39 16 01 Fax: 02-48 30 22 74 KOREA:FL., URI Building 2-14 Yangjae-Don

11、g Seocho-Gu, Seoul 137-130 82-2-574-7778 Fax: 82-2-574-7838 NETHERLANDS:Postbus 559 4200 AN Gorinchem 0183-635333 Fax: 0183-630821 SWEDEN:c/o Regus Business Centre Frosundaviks All 15, 4tr 169 70 Solna 08-509 04 679 Fax: 08-655 26 10 SWITZERLAND:Kriesbachstrasse 4 8600 Dbendorf 01-821 94 44 Fax: 01-

12、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 Model 228A Voltage/Current Source Instruction Manual All references to the Model 228 apply also to the Model

13、 228A. 1988, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Fifth Printing, December 2000 Document Number: 228A-901-01 Rev. E RadioFans.CN 收音机爱 好者资料库 Safety Precautions The following safety precautions should be observed before using this product and any associated instrumen

14、tation. Although some in- struments and accessories would normally be used with non-haz- ardous voltages, there are situations where hazardous conditions may be present. This product is intended for use by qualifi ed personnel who recog- nize shock hazards and are familiar with the safety precaution

15、s re- quired to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using the product. Refer to the manual for complete product specifi cations. If the product is used in a manner not specifi ed, the protection pro- vided by the product ma

16、y be impaired. 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 en- suring that operators are adequately trained. Oper

17、ators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the instru- ment. They must be protected from electric shock and contact with hazardous live circuits. Maintenance personnel perform routine procedures on the product to keep it op

18、erating properly, for example, setting the line voltage or replacing consumable materials. Maintenance procedures are de- scribed 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 trai

19、ned to work on live circuits, and perform safe installations and repairs of products. Only properly trained ser- vice personnel may perform installation and service procedures. Keithley products are designed for use with electrical signals that are rated Installation Category I and Installation Cate

20、gory II, as de- scribed in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most measurement, control, and data I/O sig- nals are Installation Category I and must not be directly connected to mains voltage or to voltage sources with high transient over-volt- ages. Installation

21、 Category II connections require protection for high transient over-voltages often associated with local AC mains connections. Assume all measurement, control, and data I/O con- nections are for connection to Category I sources unless otherwise marked or described in the Manual. Exercise extreme cau

22、tion when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test fi xtures. The American National 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 e

23、xpect that hazardous voltage is present in any unknown circuit before measuring. Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators are pre- vented access and/or insulated from every connection point. In some cases, connectio

24、ns must be exposed to potential human con- tact. Product operators in these circumstances must be trained to protect themselves 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. Do not connect switching c

25、ards directly to unlimited power circuits. They are intended to be used with impedance limited sources. NEVER connect switching cards directly to AC mains. When con- necting sources to switching cards, install protective devices to lim- it fault current and voltage to the card. Before operating an i

26、nstrument, make sure the line cord is connect- ed to a properly grounded power receptacle. Inspect the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use. When installing equipment where access to the main power cord is restricted, such as rack mounting,

27、a separate main input power dis- connect device must be provided, in close proximity to the equip- ment and within easy reach of the operator. 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 fro

28、m the entire test system and discharge any capacitors before: connecting or disconnecting cables or jump- ers, 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 com- mon side of

29、 the circuit under test or power line (earth) ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured. The instrument and accessories must be used in accordance with its specifi cations and operating instructions o

30、r the safety of the equip- ment may be impaired. Do not exceed the maximum signal levels of the instruments and ac- cessories, as defi ned in the specifi cations and operating informa- tion, and as shown on the instrument or test fi xture panels, or switching card. When fuses are used in a product,

31、replace with same type and rating for continued protection 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 ap- plied to the device un

32、der test. Safe operation requires the use of a lid interlock. If a screw is present, connect it to safety earth ground using the wire recommended in the user documentation. The symbol on an instrument indicates that the user should re- fer to the operating instructions located in the manual. The sym

33、bol on an instrument shows that it can source or mea- sure 1000 volts or more, including the combined 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 person

34、al injury or death. Always read the associated infor- mation 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

35、 humans. Before performing any maintenance, disconnect the line 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 Instru- ments. Stand

36、ard fuses, with applicable national safety approvals, may be used 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 se- lected parts should be purchased only thr

37、ough Keithley Instruments to maintain accuracy and functionality 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 th

38、e instrument only. Do not apply cleaner directly to the instrument or allow liquids to enter 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

39、 to in- structions. If the board becomes contaminated and operation is af- fected, the board should be returned to the factory for proper cleaning/servicing. ! 11/01 SPECIFICATIONS AS A CONSTANT VOLTAGE SOURCE RANGE OUTPUT COMPLIANCE (Source or Sink) ACCURACY ACCURACY MAXI- RESO- (1 YEAR) MAXI- RESO

40、 (1YEAR) MIJMLUnON 184-28T MUM LUnON 1802ST loOV rtlol.oV lC + 1OV decreases magnitude of programmed output by 100% of full scale. ACCURACY: 2% typical, dc to 6OHz. MAXIMUM MODULATION: Modulation and programmed settin should not cause operation exceeding the range of zero to 101% of fui i scale. MOD

41、ULATION FREQUENCY: 6OOHz bandwidth. IEEE-488 BUS IMPLEMENTATIoN (IElZE-48I.;IL; COMMANDS: DCL, LLO, SDC, GET, GTL, UNT, UNL, UNILINE COMMANDS: IFC, REN, EOI, SRQ, ATN. INTERFACE FUNCTIONS: SHl, AHl, Tb, TEtJ, L4, LEO, SRI, RLl, PPO, DCl. DTl. CO. El. PROGRAMMABLE PARAMETERS: Output (operate or stand

42、by), Range, Voltage, Current, Trigger Mode, Sink, Modulation (Voltage or Current), Display Mode, Output Prefix (data format on readback), SRQ Mask, EOI, Terminator Characters, Status, Self Test, Memory Location (100 point memory), Dwell Time. GENERAL DISPLAY: Dual 3i/,-digit LED (0.5 in.) indicate p

43、rogrammed values in Standby and output values in Operate. READBACK ACCURACY: Same as output accuracy. FRONT PANEL PROGRAMS: COPY, SINK, IEEE address, MOD V, MOD I, TEST, RESET. LOAD TRANSIENT RECOVERY TIME: With a resistive load the output will recover 90% of any load changes within Ims after end of

44、 changes, provided the changes do not cause transfer to another control mode. STANDBY: Programs ourput to OV, OA without changing ranges or polarity. LINE REGULATION: Less than 0.01% output change for ac power line changes within specified limits. PROGRAM MEMORY (battery backed up): Stores up to 100

45、 output set- tings. Range of Dwell Times: lOms to 1000s. Accuracy of Dwell Times: *(O.O5%+2ms). BATTERY BACKUP: Rechargeable 3.6V nickel-cadmium. 1 month reten- tion of data with unit turned off. TRIGGER: IN and OUT I-IL-compatible. PROGRAMMING RESPONSE TIME: Less than 1OOms on fixed range (typical)

46、. MAXIMUM COMMON MODE VOLTAGE (output or output common to chassis): 1OOV dc. OUTPUT CONNECTIONS: Quick disconnect card with screw terminals for output, modulation, current monitor, and external sense. BNC (chassis isolated) connectors for TRIGGER IN/OUT. SELF TEST: Analog and digital circuits tested

47、 at power-on. Power sup- plies, temperatures, and output continuously monitored. WARMUP: 10 minutes to rated accuracy. POWER: 10.5-125 or 210-250 V ac (internally switch selectable), 50 or 60Hz, 500 VA maximum. COOLING: Internal fan for forced air cooling. ENVIRONMENT: Operating: 0” to 50C. less tha

48、n 80% non-condensing RH below 35C. Storage: -25“ to 70C. DIMENSIONS, WEIGHT: 133mm high X 435mm wide X 448mm deep (51/r in. X 17% in. X 1736 in.). Net weight 10.9kg (24 Ibs.). ACCESSORIES AVAILABLE: Model 2288: Model 2289: Fixed Rack Mounting Kit Slide Rack Mounting Kit Model 7008-3: IEEE-488 Cable

49、(3 ft.) Model 7008-6: IEEE-488 Cable (6 ft.) i TABLE OF CONTENTS SECTION 1 GENERAL INFORMATION 1.1Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1 1.2Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .