KEI2002-903-01 电路图.pdf

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1、 A G R E A T E R M E A S U R E O F C O N F I D E N C E Model 2002 Multimeter Getting Started Manual 2002- 903- 01 Rev. A / May 1994 A G R E A T E R M E A S U R E O F C O N F I D E N C E Model 2002 Multimeter Getting Started Manual 2002- 903- 01 Rev. A / May 1994 2002-903-01 (A - May 1994).qxp 3/25/2

2、008 10:42 AM Page 1 RadioFans.CN 收音机爱 好者资料库 Model 2002 Multimeter Getting Started Manual 1994, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. First Printing May 1994 Document Number: 2002-903-01 Rev. A RadioFans.CN 收音机爱 好者资料库 Manual Print History The print history shown belo

3、w 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 incorporate imm

4、ediately 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. Revision A (Documen

5、t Number 2002-903-01).May 1994 All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc. Other brand names are trademarks or registered trademarks of their respective holders. RadioFans.CN 收音机爱 好者资料库 Safety Precautions 11/07 The following safety precautions sho

6、uld be observed before using this product and any associated instrumentation. Although some instruments and accessories would normally be used with non-hazardous voltages, there are situations where hazardous conditions may be present. This product is intended for use by qualified personnel who reco

7、gnize shock hazards and are familiar with the safety precautions required to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using the product. Refer to the user documentation for complete product specifications. If the product is used

8、 in a manner not specified, the protection provided by the product warranty may 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 specifications and ope

9、rating limits, and for ensuring that operators are adequately trained. Operators 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. Main

10、tenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line voltage or replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures explicitly state if the operator may perform them. Otherw

11、ise, they should be performed only by service personnel. Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained service personnel may perform installation and service procedures. Keithley Instruments products are designed for us

12、e with electrical signals that are rated Measurement Category I and Measurement Category II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most measurement, control, and data I/O signals are Measurement Category I and must not be directly connected to mains

13、voltage or to voltage sources with high transient over-voltages. Measurement 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 connections are for connection to Category I source

14、s unless otherwise marked or described in the user documentation. Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels g

15、reater 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. Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators are prev

16、ented access and/or insulated from every connection point. In some cases, connections must be exposed to potential human contact. 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 1000V,

17、no conductive part of the circuit may be exposed. Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance-limited sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective devic

18、es to limit fault current and voltage to the card. Before operating an instrument, ensure that the line cord is connected 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 wh

19、ere access to the main power cord is restricted, such as rack mounting, a separate main input power disconnect device must be provided in close proximity to the equipment and within easy reach of the operator. For maximum safety, do not touch the product, test cables, or any other instruments while

20、power is applied to the circuit under test. ALWAYS remove power from the entire test system and discharge any capacitors 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

21、 object that could provide a current path to the common side of 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 a

22、ccordance with its specifications and operating instructions, or the safety of the equipment may be impaired. Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating information, and as shown on the instrument or test fixture panels,

23、 or switching card. When fuses are used in a product, replace with the same type and rating for continued protection against fire 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 fixture, keep

24、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, connect it to safety earth ground using the wire recommended in the user documentation. The symbol on an instrument indicates that the user should refer to the o

25、perating instructions located in the user documentation. The symbol on an instrument shows that it can source or measure 1000V or more, including the combined effect of normal and common mode voltages. Use standard safety precautions to avoid personal contact with these voltages. The symbol on an in

26、strument shows that the surface may be hot. Avoid personal contact to prevent burns. The symbol indicates a connection terminal to the equipment frame. If this symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be properly disposed of acc

27、ording to federal, state, and local laws. The WARNING heading in the user documentation explains dangers that might result in personal injury or death. Always read the associated information very carefully before performing the indicated procedure. The CAUTION heading in the user documentation expla

28、ins 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. To maintain protection from electric shock and fire, replacement c

29、omponents 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 are the same. Other components that are not safety-related may be purc

30、hased 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 accuracy and functionality of the product). If you are unsure about the applicability of a replacement component, call a Kei

31、thley Instruments office 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 enter or spill on the instrument. Products that consist of a circuit board w

32、ith no case or chassis (e.g., a data acquisition board for installation into a computer) should never require cleaning if handled according to instructions. If the board becomes contaminated and operation is affected, the board should be returned to the factory for proper cleaning/servicing. ! Table

33、 of Contents 1 Front Panel Operation Product overview.1-2 Display .1-8 Power-up.1-8 Bench defaults.1-9 Voltage measurements.1-10 Current measurements.1-11 Two and four-wire resistance measurements .1-12 Frequency measurements.1-14 Temperature measurements.1-16 2 Measurement Options Multiple displays

34、.2-2 Menus.2-6 Relative.2-10 Trigger.2-11 Speed.2-14 Resolution.2-15 Filter.2-16 Buffer (Data Store).2-18 Math .2-20 Internal scanning.2-22 External scanning.2-26 3 IEEE-488 Bus Operation Software support.3-2 IEEE-488 bus standards .3-3 IEEE-488 bus connections .3-3 Primary address selection.3-4 Com

35、mon commands.3-5 SCPI commands.3-6 SCPI command syntax.3-7 SCPI signal oriented commands .3-11 SCPI subsystem commands .3-12 Program examples.3-18 4 Specs and Accessories Condensed specifi cations .4-2 Accessories available.4-8 1 Front Panel Operation Product overview If you have any questions after

36、 reviewing this information, please contact your local Keithley representative, or call one of our Applications Engineers at 1-800-348-3735 (U.S. and Canada only). Worldwide phone numbers are listed on the back cover. The Model 2002 is an 8 -digit multimeter with the following measurement capabiliti

37、es: DC voltage measurements from 1nV to 1100V AC RMS voltage measurements from 100nV to 750V, 1100V peak DC current measurements from 10pA to 2.1A AC current measurements from 100pA to 2.1A 2-wire resistance measurements from 100n to 1.05G 4-wire resistance measurements from 100n to 2.1M Frequency m

38、easurements from 1Hz to 15MHz RTD temperature measurements from -200 C to +630 C Thermocouple temperature measurements (with optional card) from -200 C to +1820 C Figure 1 Measurement ranges (resolution) 1nV 100nV 1Hz 100A 100pA 1Hz 60mV 60ns 0.001 20Hz 500ns 2s 100n 1.4A 1100V 1100V 2MHz 2.1A 12A 2

39、.1A 15MHz 600V 1 second 630 1820C 1MHz 16 seconds 16 seconds 7.2mA 1M 106 1k 103 1 100 1m 103 1 106 1n 109 1G 1G 109 1p 1012 DC Voltage AC Voltage AC Voltage Bandwidth DC Current DC In-Circuit Current AC Current Frequency Frequency Sensitivity Period TemperatureRTD TemperatureTC Crest Factor Peak Sp

40、ikesRepetitive Peak SpikesSingle Resistance (2-wire) Ohms Source Current 10pA Logarithmic scale 100n2.1MResistance (4-wire) 0.001 1-2Front Panel Operation Some additional capabilities of the Model 2002 include: Data storage with burst mode capability Scan (measure) channels of an external scanner (e

41、.g., Model 7001 or 7002) Single button zeroing (REL) Built-in math functions Digital fi ltering Remote operation using the IEEE-488 bus By installing the appropriate option card, the capabilities of the Model 2002 are extended as follows: Scan internal channels (Model 2001-SCAN Scanner Card or Model 2001-TCSCAN Thermocouple Scanner Card) Perform thermocouple tem