FLUKE 189_Calibration 电路图.pdf

187/189 True RMS Multimeter Calibration Manual PN 1584337 November 2000 Rev.1, 6/02 2000-2002 Fluke Corporation. All rights reserved. Printed in U.S.A. All product names are trademarks of their respective companies. RadioFans.CN 收音机爱 好者资料库 LIFETIME LIMITED WARRANTY Each Fluke 20, 70, 80, 170 and 180 Series DMM will be free from defects in material and workmanship for its lifetime. As used herein, “lifetime” is defined as seven years after Fluke discontinues manufacturing the product, but the warranty period shall be at least ten years from the date of purchase. This warranty does not cover fuses, disposable batteries, damage from neglect, misuse, contamination, alteration, accident or abnormal conditions of operation or handling, including failures caused by use outside of the products specifications, or normal wear and tear of mechanical components. This warranty covers the original purchaser only and is not transferable. For ten years from the date of purchase, this warranty also covers the LCD. Thereafter, for the lifetime of the DMM, Fluke will replace the LCD for a fee based on then current component acquisition costs. To establish original ownership and prove date of purchase, please complete and return the registration card accompanying the product, or register your product on . Fluke will, at its option, repair at no charge, replace or refund the purchase price of a defective product purchased through a Fluke authorized sales outlet and at the applicable international price. Fluke reserves the right to charge for importation costs of repair/replacement parts if the product purchased in one country is sent for repair elsewhere. If the product is defective, 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 difficulty, postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Fluke will pay return transportation for product repaired or replaced in-warranty. Before making any non-warranty repair, Fluke will estimate cost and obtain authorization, then invoice you for repair and return transportation. THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSED OR IMPLIED. 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. AUTHORIZED RESELLERS ARE NOT AUTHORIZED TO EXTEND ANY DIFFERENT WARRANTY ON FLUKES BEHALF. Since some states do not allow the exclusion or limitation of an implied warranty or of incidental or consequential damages, this limitation of liability may not apply to you. If any provision of this warranty is held invalid or unenforceable by a court or other decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any other provision. Fluke CorporationFluke Europe B.V. P.O. Box 9090P.O. Box 1186 Everett, WA 98206-90905602 BD Eindhoven U.S.A.The Netherlands 2/02 RadioFans.CN 收音机爱 好者资料库 i Table of Contents TitlePage Introduction. 1 Contacting Fluke . 1 Precautions and Safety Information. 2 International Symbols. 2 Safety Information. 3 Specifications. 4 Accuracy . 4 Feature Summary. 4 Basic Specifications . 5 Detailed Accuracy Specifications . 6 Frequency Counter Sensitivity. 9 Burden Voltage (A, mA, A). 9 Input Characteristics. 9 Required Equipment. 10 Basic Maintenance . 11 Opening the Meter Case. 11 Removing and Reinserting the Circuit Board Assembly. 11 Replacing the LCD. 12 Reassembling the Meter Case. 13 Testing Fuses (F1 and F2). 13 Replacing Fuses . 14 Replacing the Batteries. 14 Cleaning. 15 Performance Tests. 16 Testing the Display. 16 Backlight Test. 16 Current Terminal Sensing Test. 16 Keypad Test. 17 Verification of the IR Communication Port. 17 Testing Temperature. 17 Testing Voltage, Current, Resistance, Capacitance and Diode Functions. 18 Calibration. 21 Keypad Interface. 21 General Procedure. 22 Special Requirements. 23 Calibration Inputs. 23 RadioFans.CN 收音机爱 好者资料库 187/189 Calibration Manual ii Remote Interface. 25 Temperature Calibration. 25 Setup. 25 Procedure. 26 Re-Programming Serial Number or Model Number. 26 Parts and Accessories. 27 iii List of Tables TableTitlePage 1.International Symbols. 2 2.Required Tools and Equipment. 10 3.Temperature Test Input and Display. 17 4.Performance Test Steps. 18 5.Calibration Inputs . 23 187/189 Calibration Manual iv v List of Figures FigureTitlePage 1.Removing LCD Mask to Access LCD. 12 2.Testing the Current Fuses. 14 3.Battery and Fuse Replacement . 15 4.Display Test. 16 5.Locating Recessed Calibration Button. 21 6.Calibration Display. 22 7.Replacement Parts and Accessories. 28 187/189 Calibration Manual vi 1 Introduction W Warning To avoid shock or injury, do not perform the verification tests or calibration procedures described in this manual unless you are qualified to do so. The information provided in this document is for the use of qualified personnel only. Caution The 187 a Caution identifies conditions and actions that may damage the Meter or the test instruments. International Symbols International symbols used on the Meter and in this manual are explained in Table 1. Table 1. International Symbols Symbol Meaning Symbol Meaning Alternating current Earth ground Direct current Fuse Alternating or direct current Conforms to European Union directives Refer to the manual. Important information. Conforms to relevant Canadian Standards Association directives Inspected and licensed by TV Product Services. Double insulated Battery Underwriters Laboratories, Inc. Conforms to VDE Standards True RMS Multimeter Safety Information 3 Safety Information WWarnings and Precautions To avoid possible electric shock or personal injury, follow these guidelines: Do not use the Meter if it is damaged. Before you use the Meter, inspect the case. Look for cracks or missing plastic. Pay particular attention to the insulation surrounding the connectors. Inspect the test leads for damaged insulation or exposed metal. Check the test leads for continuity. Replace damaged test leads before you use the Meter. Do not use the Meter if it operates abnormally. Protection may be impaired. When in doubt, have the Meter serviced. Do not operate the Meter around explosive gas, vapor, or dust. Do not apply more than the rated voltage, as marked on the Meter, between terminals or between any terminal and earth ground. Before use, verify the Meters operation by measuring a known voltage. When measuring current, turn off circuit power before connecting the Meter in the circuit. Remember to place the Meter in series with the circuit. When servicing the Meter, use only specified replacement parts. Use caution when working above 30 V ac rms, 42 V peak, or 60 V dc. Such voltages pose a shock hazard. Avoid working alone. When using the probes, keep your fingers behind the finger guards on the probes. Connect the common test lead before you connect the live test lead. When you disconnect test leads, disconnect the live test lead first. Remove test leads from the Meter before you open the battery door. Do not operate the Meter with the battery door or portions of the cover removed or loosened. To avoid false readings, which could lead to possible electric shock or personal injury, replace the batteries as soon as the low battery indicator (M) appears. Use only type AA batteries, properly installed in the Meter case, to power the Meter. Caution To avoid possible damage to the Meter or to the equipment under test, follow these guidelines: Disconnect circuit power and discharge all high-voltage capacitors before testing resistance, continuity, diodes, or capacitance. Use the proper terminals, function, and range for your measurements. Before measuring current, check the Meters fuses and turn power OFF to the circuit before connecting the Meter to the circuit. 187/189 Calibration Manual 4 Specifications Accuracy Accuracy is specified for a period of one year after calibration, at 18 C to 28 C (64 F to 82 F), with relative humidity to 90 %. Accuracy specifications are given as: ( % of reading + number of least significant digits ) AC mV, AC V, AC A, AC mA, and AC A specifications are ac-coupled, true rms and are valid from 5 % of range to 100 % of range. AC crest factor can be up to 3.0 at full-scale, 6.0 at half-scale, except the 3000 mV and 1000 V ranges where it is 1.5 at full scale, 3.0 at half- scale. Feature Summary FeatureDescription Dual Digital Displays Analog Bar Graph Primary: 50,000 counts Secondary: 5,000 count Bar graph: 51 segments, updates 40 times/second Backlight with 2 brightness levelsBright white backlight for clear readings in poorly lighted areas Fast AutorangeMeter automatically selects best range - instantly AC+DC true rms, ac rms specified to 100 kHz Choices for AC only, AC and DC dual display, or AC+DC readings dBm, dBVUser selectable impedance references for dBm AutoHOLDHolds readings on display Continuity / Open testBeeper sounds for resistance readings below threshold, or to indicate a momentary open circuit Fast Bar Graph51 segments for peaking and nulling Duty cycle / Pulse widthMeasure signal on or off time in % or milliseconds MIN MAX Mode FAST MN MX with 24-hour time stamp Record maximum, minimum, and average values. 24-hour clock for MAX or MIN, elapsed time for AVG. FAST MN MX captures peaks to 250 sec. Closed-Case CalibrationNo internal adjustments needed Battery / Fuse Access DoorBattery or fuse replaceable without voiding calibration Hi-Impact Overmolded CaseProtective holster features True RMS Multimeter Basic Specifications 5 Basic Specifications FunctionRanges/Description DC Voltage0 to 1000 V AC Voltage, true RMS2.5 mV to 1000 V 100 kHz bandwidth Basic AccuracyDC voltage: 0.025 % AC voltage: 0.4 % DC Current0 to 10 A (20 A for 30 seconds) AC Current, true RMS25 A to 10 A (20 A for 30 seconds) Resistance0 to 500 M Conductance0 to 500 nS Capacitance0.001 nF to 50 mF Diode Test3.1 V Temperature200 C to 1350 C (328 F to 2462 F) Frequency0.5 Hz to 1000 kHz LOGGING Intervals (Model 189 only) At least 288 intervals may be stored. Up to 700 unstable event values (see AutoHold) are automatically added to LOGGING memory for viewing only through optional PC software. Additional intervals will be logged up to 995 if the signal is stable. SAVE Readings (Model 189 only) Up to 100 readings may be saved b