FLUKE 8845a_um 电路图.pdf

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1、 8845A/8846A Digital Multimeter Calibration Manual January 2007, Rev. 1, 11/07 2007 Fluke Corporation, All rights reserved. Specifications subject to change without notice. All product names are trademarks of their respective companies. RadioFans.CN 收音机爱 好者资料库 LIMITED WARRANTY AND LIMITATION OF LIAB

2、ILITY Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one year and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days. This warranty extends only to the original buyer

3、 or end-user customer of a Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in Flukes opinion, has been misused, altered, neglected, contaminated, or damaged by accident or abnormal conditions of operation or handling. Fluke warrants that softwar

4、e will operate substantially in accordance with its functional specifications for 90 days and that it has been properly recorded on non-defective media. Fluke does not warrant that software will be error free or operate without interruption. Fluke authorized resellers shall extend this warranty on n

5、ew and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price. Fluke reserve

6、s the right to invoice Buyer for importation costs of repair/replacement parts when product purchased in one country is submitted for repair in another country. Flukes warranty obligation is limited, at Flukes option, to refund of the purchase price, free of charge repair, or replacement of a defect

7、ive product which is returned to a Fluke authorized service center within the warranty period. To obtain warranty service, contact your nearest Fluke authorized service center to obtain return authorization information, then send the product to that service center, with a description of the difficul

8、ty, postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke determines that failure was caused by neglect, misuse, contamination, alteration, acc

9、ident, or abnormal condition of operation or handling, including overvoltage failures caused by use outside the products specified rating, or normal wear and tear of mechanical components, Fluke will provide an estimate of repair costs and obtain authorization before commencing the work. Following r

10、epair, the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges (FOB Shipping Point). THIS WARRANTY IS BUYERS SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT

11、LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY. Since some countries or states do not allow limitatio

12、n of the term of an implied warranty, or exclusion or limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court or other decision-maker of competent ju

13、risdiction, such holding will not affect the validity or enforceability of any other provision. Fluke Corporation P.O. Box 9090 Everett, WA 98206-9090 U.S.A. Fluke Europe B.V. P.O. Box 1186 5602 BD Eindhoven The Netherlands 11/99 To register your product online, visit RadioFans.CN 收音机爱 好者资料库 i Table

14、 of Contents Chapter Title Page 1 Introduction and Specifications. 1-1 Introduction. 1-3 Safety Information. 1-3 Symbols. 1-4 General Safety Summary. 1-4 Description of IEC 61010 Measurement Categories . 1-6 Organization of the Calibration Manual. 1-7 Chapter 1 Introduction and Specifications . 1-7

15、Chapter 2 General Maintenance. 1-7 Chapter 3 Performance Test and Calibration. 1-7 Chapter 4 List of Replaceable Parts . 1-7 Operating Instructions. 1-7 Accessories . 1-7 General Specifications. 1-9 Power. 1-9 Dimensions. 1-9 Display. 1-9 Environment. 1-9 Safety. 1-9 EMC . 1-9 Triggering. 1-9 Memory

16、. 1-10 Math Functions. 1-10 Electrical. 1-10 Remote Interfaces. 1-10 Warranty. 1-10 Electrical Specifications . 1-10 DC Voltage Specifications. 1-10 Input Characteristics. 1-11 8846A Accuracy. 1-11 8845A Accuracy. 1-11 Additional Errors. 1-11 AC Voltage Specifications. 1-11 Input Characteristics. 1-

17、12 8846A Accuracy. 1-12 RadioFans.CN 收音机爱 好者资料库 8845A/8846A Calibration Manual ii 8845A Accuracy. 1-13 Additional Low Frequency Errors. 1-13 Resistance. 1-14 Input Characteristics. 1-14 8846A Accuracy. 1-14 8845A Accuracy. 1-15 Additional Ohms Errors. 1-15 DC Current. 1-15 Input Characteristics. 1-1

18、5 Accuracy (8846A). 1-16 Accuracy (8845A). 1-16 Additional Current Errors . 1-16 AC Current. 1-17 Input Characteristics. 1-17 8846A Accuracy. 1-17 8845A Accuracy. 1-18 Additional Low Frequency Errors. 1-19 Frequency. 1-19 8846A Accuracy. 1-19 8845A Accuracy. 1-20 Gate Time vs. Resolution. 1-20 Addit

19、ional Low Frequency Errors. 1-20 Capacitance (8846A Only). 1-20 Temperature (8846A only). 1-21 Continuity. 1-21 Diode Test . 1-21 Measurement Rates (IEEE4884). 1-22 Measurement Uncertainty. 1-22 Interpreting Accuracy Specifications. 1-23 24-Hour Accuracy. 1-23 90-Day and 1-Year Accuracy. 1-23 Temper

20、ature Coefficients. 1-23 Configuring for Highest Accuracy Measurements . 1-23 DC Voltage, DC Current, and Resistance Measurements. 1-23 AC Voltage and AC Current Measurements:. 1-23 Frequency and Period Measurements:. 1-23 2 General Maintenance . 2-1 Introduction. 2-3 Warranty Repairs and Shipping I

21、nformation. 2-3 General Maintenance Information. 2-3 Required Equipment. 2-3 Power Requirements. 2-3 Static Safe Handling. 2-3 Cleaning. 2-4 Fuse Replacement. 2-4 Line-Power Fuse. 2-4 Current-Input Fuses. 2-5 If the Meter Does Not Turn On. 2-7 Display Tests. 2-7 Disassembly Procedures. 2-7 General D

22、isassembly. 2-7 Main Chassis Disassembly. 2-8 Front Panel Disassembly. 2-8 Contents (continued) iii Assembly Procedures. 2-8 3 Performance Test and Calibration. 3-1 Introduction. 3-3 Required Equipment. 3-3 Test Considerations. 3-5 Performance Tests. 3-5 Volts DC Verification. 3-5 Volts DC Ratio Verification. 3-8 Volts AC and Frequency Verification. 3-9 4-Wire Ohms Verification. 3-14 2-Wire Ohms Verification. 3-16 2X4 Test Lead Verification Steps . 3-18 Rear Panel Terminal Verification Step