KEI 2001TC Scan Operation 电路图.pdf

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1、 Contains Operating and Servicing Information Model 2001-TCSCAN Scanner Card Instruction Manual 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, In

2、c. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batter- ies, 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 cal

3、l 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.

4、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. This warr

5、anty also does not apply to fuses, software, non-rechargeable batteries, damage from battery leak- age, 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 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 INSTRU- MENTS AND SOFTW

7、ARE EVEN IF KEITHLEY INSTRUMENTS, INC., HAS BEEN ADVISED IN ADVANCE OF THE POS- SIBILITY OF SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIMITED TO: COSTS OF REMOVAL AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON, OR DAM- AGE 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, England RG3 1EA 44-1189-596469 Fax: 44-1189-575666 ITAL

10、Y:Keithley 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: 41-1-82

11、03081 TAIWAN: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 2001-TCSCAN Instruction Manual 1993, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Second Printing, January 1997 Document Num

12、ber: 2001-TCSC-901-01 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 subsequent updates. Addenda, which are rel

13、eased between Revisions, contain important change information 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 the

14、 manual. Each new Revi- sion includes a revised copy of this print history page. Revision A (Document Number 2001-TCSC-901-01).March 1993 Addendum A (Document Number 2001-TCSC-901-02) .November 1995 Revision B (Document Number 2001-TCSC-901-01). January 1997 All Keithley product names are trademarks

15、 or registered trademarks of Keithley Instruments, Inc. Other brand and product 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 instrumentation. Although som

16、e 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 precautions re- quired to avoi

17、d possible injury. Read the operating information carefully before using 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

18、 limits, and for en- suring 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 instru- ment. They must be protected from electric shock and contact with hazardous live circuits. Mainte

19、nance personnel perform routine procedures on the product to keep it operating, for example, setting the line voltage or replac- ing consumable materials. Maintenance procedures are described in the manual. The procedures explicitly state if the operator may per- form them. Otherwise, they should be

20、 performed only by service personnel. Service personnel are trained 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. Exercise extreme caution when a shock hazard is present. Le

21、thal 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 expect that hazardous voltage is present

22、 in any unknown circuit before measuring. Users of this product must be protected from electric 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. Pr

23、oduct users 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. As described in the International Electrotechnical Commission (IEC) Standard IEC

24、664, digital multimeter measuring circuits (e.g., Keithley Models 175A, 199, 2000, 2001, 2002, 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 cir

25、cuits. 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 instrument, make sure the line cord i

26、s 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. For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under test. AL

27、WAYS remove power from 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

28、 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 accordance with its specifi cations and opera

29、ting instructions or 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

30、used in a product, 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- pli

31、ed 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 re- fer to the operating instructions located in

32、the manual. The symbol 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 mig

33、ht result in personal 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

34、not be connected to 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 I

35、nstru- ments. 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 purchased from other suppliers as long as they are equivalent to the original component. (Note that se- lected parts should be

36、 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 Keithley Instruments offi ce for information. To clean an instrument, use a damp cloth or mild, water based cleaner. Clean

37、 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 with no case or chassis (e.g., data acquisition board for installation into a computer) should never require cleaning i

38、f handled according 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. ! Rev. 2/99 2001-TCSCAN THERMOCOUPLE/GENERAL PURPOSE SCANNER CARD SPECIFICATIONS Specifications GENERAL: 9 channels of 2-po

39、le analog input, 1 cold junction sensor. FUNCTIONS: DCV, ACV, 4-wire , Thermocouple, 2-wire , 4-wire RTD, 2- wire RTD, Frequency (can be mixed from channel to channel). THERMOCOUPLE SCAN SPEED: 25 channels/second 0.1C resolution; 43 channels/second 1C resolution. CAPABILITIES: Multiplex one of nine

40、2-pole or one of four 4-pole analog signals into Model 2001 DMM and/or any combination of 2- or 4-pole analog signals. REFERENCE OUTPUT: +200V/C (+54.63mV at 0C). ALL INPUTS Maximum Signal Levels2: DC: 110V DC, 105 operations at maximum signal level; 108 operations cold switching. Contact Resistance

41、2: 1 at end of contact life. Actuation Time: 2.5ms maximum on/off. Contact Potential3: 109, 75pF. Common Mode Voltage: 350V peak between any terminal and earth. Maximum Voltage Between Any Two Terminals: 110VDC, 125VAC RMS. DIMENSIONS, WEIGHT: 21mm high 72mm wide 221mm deep (0.83 in 2.83 in 8.7 in).

42、 Net weight 283g (10 oz). 2Channels 5 and 10 maximum power = 0.25 VA maximum (factory installed 120, 5%, 1/4W resistors. User may replace with jumper. See note in manual for complete instructions.) 3Channels 5 and 10 contact potential = 1V typical, 2V max. Channel 1 (Reference Junction) HI LO Channe

43、l 2-4 Channel 5 HI LO Channel 6 HI LO Channel 7-9 Channel 10 HI LO OUT A (To Model 2001 input jacks) OUT B (To Model 2001 sense jacks) HI LO 2-Pole4-Pole Specifications subject to change without notice. Thermocouple Accuracy Total Absolute Error1 1 Year ThermocoupleDefault018C see paragraph 4.8.) I

44、4-Pole connections Typical 4-pole resistance connections are shown in Figure 2- 8. This general confi guration can be used with channel pairs 2-5 and 7-10 to scan: 4-wire resistance measurements. 4-wire RTD temperature measurements. Resistors Under Test HIHILOHILOHILOHILOHILOHILOHILOHILOHILOHILO CH

45、2 CH 3 CH 4 CH 5 OUT A CH 6 CH 7 CH 8 CH 9 CH 10 OUT B 2001-TCSCAN Card HI LO LO To DMM Input Jacks NOTE: Do not use channels 5 and 10 for 2-wire resistance measurements Figure 2-7 Typical connections for 2-wire resistance scanning Card Connections and Installation 2-9 Resistors Under Test HIHILOHIL

46、OHI LOHI LOHILOHILOHILOHILOHILOHILO CH 2 CH 3 CH 4 CH 5 OUT A CH 6 CH 7 CH 8 CH 9 CH 10 OUT B 2001-TCSCAN Card HI LO LO To DMM Input Jacks HI LO To DMM Sense Jacks Figure 2-8 Typical connections for 4-wire resistance scanning Card Connections and Installation 2-10 2.5Card installation and removal Th

47、is paragraph explains how to install and remove the Model 2001-TCSCAN card assembly from the DMM. WARNING Installation or removal of the Model 2001-TCSCAN should be performed only by qualifi ed service personnel. Failure to recognize and observe stan- dard safety precautions could result in personal

48、 injury or death. CAUTION To prevent contamination to the scan- ner card that could degrade perfor- mance, handle the card assembly only by the card edges and covers. NOTE Wiring connections must made before in- stalling the scanner card. See paragraph 2.4 for wiring details. 2.5.1Scanner card installation Perform the following steps and refer to Figure 2-9 to install the card assembly in the DMM: WARNING Turn off power to all instrumentation (including the DMM), and disconnect all line cords. Make sure all