FLUKE 36 电路图.pdf

PN 200409 September 1996 Rev. 1, 2/98 1996, 1998 Fluke Corporation. All rights reserved. Printed in U.S.A. Product names are trademarks of their respective companies. 1 36 AC/DC True Rms Clamp Meter Service Information WWarning Do not service the Meter unless you are qualified to do so. The service information provided in this document is for the use of qualified personnel only. To avoid electrical shock or personal injury: Always remove the test leads and input signals from the Meter before opening the case. Use caution when working with voltages above 60V dc or 30V ac. WWarning To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator appears. Y Caution The Meter is protected throughout by double insulation or reinforced insulation. When servicing the Meter, use only specified replacement parts. Caution This Meter contains parts that can be damaged by static discharge. Follow the standard practices for handling static sensitive devices. Introduction This Service Information document provides the following service information for the 36 AC/DC True Rms Clamp Meter (hereafter referred to as the Meter): Product specifications Required equipment Performance test procedure and test values Preparing for calibration Calibration procedure and adjustments AC amps test Replacement parts For operating information, refer to the Instruction Sheet that came with the Meter. RadioFans.CN 收音机爱 好者资料库 36 AC/DC True Rms Clamp Meter 2 Service The Meter is warranted to be free from defects in material and workmanship for one year. The warranty does not cover abuse, batteries or fuses, or damage caused by using the Meter outside its rated specifications or operating environment. The complete warranty statement is in the Meters Instruction Sheet. To contact Fluke, call one of the following telephone numbers: USA and Canada: 1-888-99-FLUKE (1-888-993-5853) Europe: +31 402-678-200 Japan: +81-3-3434-0181 Singapore: +65-*-276-6196 Anywhere in the world: +1-425-356-5500 Or, visit Flukes Web site at . To order replacement parts, call 1-800-526-4731. Outside U.S.A. contact your nearest service center. Service, repairs, and replacement parts are warranted for 90 days. Product Specifications Measurement Accuracy The accuracy of the Meter is specified for one year after calibration, at 18C to 28C (64F to 82F), with relative humidity to 90%. The Meter is true rms sensing and calibrated to the rms value of a sine wave input. General Specifications General specifications are shown in Table 1. Table 1. General Specifications Maximum voltage and frequency between any terminal and earth ground 600V, 400 Hz Operating Temperature10C to +50C (14F to 122F) Operating Altitude2,000 meters (6,562 ft) Storage Altitude10,000 meters (32,808 ft) Storage Temperature20C to +60C indefinite (4F to 140F) Temperature Coefficient0.05 x (specified accuracy)/C (28C; 82F) Electromagnetic CompatibilityIf RF field 1.6 V/m, total accuracy = specified accuracy; If RF field = 3 V/m, total accuracy = specified accuracy + 3.6% of range Operating HumidityTo 30C (85F), 95% relative humidity; To 40C (104F), 75% relative humidity; To 50C (122F), 45% relative humidity Battery Type9V, NEDA 1604A or IEC 6LR61 Battery LifeAlkaline, 60 hours continuous Jaw SizeOne 3 cm (1.2 inch) conductor, or two 2.46 cm (0.97 inch) conductors Size (HxWxL)4.5 cm x 9.5 cm x 25 cm (1.77 x 3.75 x 9.8 inches) Safety UL 3111, , TV, Complies with IEC 1010-1 for use in 600V, CAT III locations (industrial) RadioFans.CN 收音机爱 好者资料库 Required Equipment 3 Table 1. General Specifications (cont) Case ProtectionIP 30 per IEC 529 MAX Hold FeatureAccuracy: add 10 digits to ac and dc specification; Acquisition time: 250 ms (ac); 10 ms (dc) ContinuityBeeper on at 30; Beeper off at 70 Rms Settling TimeThe rms converter has a longer settling time for displays reading <100 counts. The display may read up to 5 digits with no voltage or current inputs. True Rms SensingTrue rms sensing provides more accurate readings on circuits containing harmonics or distorted waveforms. An instrument with true rms reading indicates the true heat-providing current, which may cause overheated conductors, connections, breakers, or transformers. Functional Specifications Functional specifications are shown in Table 2. Table 2. Functional Specifications FunctionRangeAccuracy* N 1000A 1000A 200A 0-600A, 1.9% Rdg + 4 dgts 600-1000A, 3% Rdg + 3 dgts 0-200A, 1.9% Rdg + 7 dgts F600V 200V 1.0% Rdg + 3 dgts O (45-400 Hz) 600A 200A 10-600A, 2% Rdg + 3 dgts 0.5-200A, 2% Rdg + 5 dgts G (45-400 Hz) 600V 200V 1.5% Rdg + 3 dgts J2001.2% Rdg + 5 dgts Crest Factor Overload Protectionm N1000A 1000A 200A NA 1000A F600V 200V NA1200V rms continuous O (45-400 Hz) 600A 200A 2 CF 3, add 2% Rdg 600A continuous (CF 3) G (45-400 Hz) 600V 200V 3 (peak voltage 933V)1200V rms J200NA660V rms continuous * See electromagnetic compatibility specification under General Specifications. RadioFans.CN 收音机爱 好者资料库 36 AC/DC True Rms Clamp Meter 4 Required Equipment Equipment required for the performance test and calibration procedure is shown in Table 3. Table 3. Required Equipment EquipmentRecommended Model AC CalibratorFluke 5700A or 5500A Digital Multimeter (DMM)Any Fluke model Transconductance AmplifierFluke 5220A Resistor, MF, 31.6, 1%Fluke P/N 296673 Resistor, MF, 34.8, 1%Fluke P/N 343897 Resistor, MF, 61.9, 1%Fluke P/N 305961 50-Turn Current CoilFluke 5500A/Coil Performance Test PWarning To avoid shock, do not execute the performance tests unless the Meter is fully assembled. The performance test verifies that the Meter is working properly and performs to specification. To test each of the Meters functions and operating ranges, do the following: 1. Connect the source to the Meters V and COM input jacks. 2. Referring to Table 4, put the Meter in the function and range for Function Test number 1 (i.e., the 200V dc function). 3. Apply the first indicated output (i.e., 20.0V dc) from the source. 4. The reading on the Meter display should be within the low and high values shown (i.e., 19.5 and 20.5, respectively). 5. Repeat steps 1-4 for each function and range in Table 4. (Tests 9-15 require the 50-Turn Current Coil; tests 11-15 require the 50-Turn Current Coil and Transconductance Amplifier.) If the Meter fails to perform within the low-high range indicated for each test in Table 4, the Meter needs to be calibrated and adjusted, or requires some repair. Table 4. Performance Test Values Function Test Meter RangeSourceOutputMeasuredLowHigh 1. DC Volts200V5700A or 5500A20.0V dc20.0V19.5V20.5V 100.0V dc100.0V98.7V101.3V 200.0V dc200.0V202.3V197.7V 2. AC Volts200V5700A or 5500A200V at 50, 60, apply 200V dc from the Calibrator. If the Meter display does not read between 199.5 and 200.5, adjust R39 until it does. 6. Set the output of the Calibrator to zero; then disconnect the Calibrator from the Meter. 7. Put the case top back on the case bottom, making sure that the rotary switch shaft is correctly seated in the rotary switch knob. 8. Turn the Meter off. 9. Proceed to calibrate the AC Voltage function. Calibration and Adjustment 7 R46 AC/DC Rotary Switch R29 R50 MAX Hold R39 R41 R36 DC Amps ZERO (R40) R37 R51 Alignment Mark when Rotary Switch in 200V setting du002f.eps Figure 1. Calibration Adjustment Points Step 2. AC Voltage 1. Turn the rotary switch on the Meter to the 600V setting. 2. Toggle the DC/AC selector until AC is shown on the display. 3. Lift off the case top. 4. Connect the Calibrator to the V and COM input jacks; then apply 600V ac from the Calibrator. If the Meter display does not read between 599 and 601, adjust R46 until it does. 5. Set the output of the Calibrator to zero; then disconnect the Calibrator from the Meter. 6. Put the case top back on the case bottom, making sure that the rotary switch shaft is correctly seated in the rotary switch knob. 7. Turn the Meter off. 8. Proceed to calibrate the beeper function. Step 3. Continuity Beeper 1. Turn the rotary switch on the Meter to the 200 setting. OL should appear on the display. 2. Lift off the case top. 3. Connect the 34.8 resistor across the V and COM inputs of the Meter. 4. Slowly turn R41 until the continuity beeper comes on. 36 AC/DC True Rms Clamp Meter 8 5. Replace the 34.8 resistor with the 61.9 resistor. The beeper should be off. 6. Replace the 61.9 resistor with the 31.6 resistor. The beeper should be on. 7. Put the case top back on the case bottom, making sure that the rotary switch shaft is correctly seated in the rotary switch knob. 8. Turn the Meter off. 9. Proceed to calibrate the DC Amps Zero function. Step 4. DC Amps Zero 1. Turn the rotary switch on the Meter to the 200A setting. 2. Toggle the DC/AC selector until DC is shown on the display. 3. Lift off the case top. 4. Mechanically center R40. which is the DC Amps ZERO adjustment (When R40 is centered, the cutout on the shaft is horizontal.) 5. Adjust R36 until the display reads between 1.0 and +1.0. 6. Turn R40 fully clockwise. The display should read 7.1 or above. 7. Turn R40 fully counter-clockwise The display should read 7.1 or below. 8. Put the case top back on the case bottom, making sure that the rotary switch shaft is correctly seated in the rotary switch knob. 9. Turn the Meter off. 10. Proceed to calibrate the MAX Hold function. Step 5. MAX Hold 1. Turn the rotary switch on the Meter to the 200A setting. 2. Toggle the DC/AC selector until DC is shown on the display. 3. Lift off the case top. 4. Turn R40 until the display reads 00.0, then press the MAX hold selector switch. 5. Turn R51 until the display reads 00.0. Press the MAX hold selector switch two or three times to confirm that the display continues to read 00.0. 6. Replace the case top on the case bottom, making sure that the rotary switch shaft is seated in the rotary switch knob. 7. Proceed to calibrate the DC Amps function. Calibration and Adjustment 9 Step 6. DC Amps 1. Connect the 50-Turn Current Coil (hereafter referred to as the Current Coil) to the Transconductance Amplifier, and the Trans-conductance Amplifier to the Calibrator.(See Figure 2.) 2. Turn the rotary switch on the Meter to the 200A setting. 3. Toggle the DC/AC selector until DC is shown on the display. 4. Lift off the case top. 5. Clamp the Meter around the Current Coil, taking care to align the conductor with the alignment marks on the jaws of the Meter. 6. Apply 4A dc to the Current Coil. Note the exact display reading. 7. Slide the Meter in the Current Coil down, so that the conductor is at the top of the jaws. Compare the reading with the Meter in this position to the reading noted in step 6. The difference between these two readings should be less than 0.5%. If it is not, adjust R37 until it is. 8. Repeat step 7 with the conductor at the bottom of the jaws. 9. Remove the Meter from the Current Coil. The display should read 00.0. If it does not, adjust R40 (DC Amps Zero) until it does. 10. Clamp the Meter back around the Current Coil, taking care to align the conductor with the alignment marks on the jaws of the Meter. 11. Mechanically center R50. 12. With 4A applied to the Current Coil, adjust R29 until the display reads between 199.9 and 200.1. If you cannot get a display reading within this range, adjust R50 until you do. 13. Remove the Meter from the Current Coil. 14. Pick up the case top and hold it face down. Notice the plastic flanges on the underside of the rotary switch knob. These flanges hold the rotary switch knob to the case top. 36 AC/DC True Rms Clamp Meter 10 15. Using your thumbs, firmly press in and down on the plastic flanges to unsnap the rotary switch knob from the case top. (See Figure 3.) 16. Place the three buttons for the MAX Hold selector, DC/AC toggle switch, and, DC Zero Amp function back in position. (See Figure 4.) 17. Put the case top back on the case bottom and turn the Meter face down. Reinsert the case bottom screws in the case bottom. (These screws were removed earlier as part of Preparing for Calibration.) 18. Clamp the Meter back around the Current Coil, taking care to align the conductor with the alignment marks on the jaws of the Meter. Make sure the Meter is still in the 200A DC function. 19. With 4A applied to the Current Coil, adjust R50 through the hole in the case top (see Figure 3) until the display reads between 199.1 and 200.1. 20. Set the output of the Calibrator and the Transconductance Amplifier to zero. 21. Remove the Meter from the Current Coil. 22. Place the rotary switch knob on the rotary switch shaft, taking care to align the selection indicator on the rotary switch knob with the 200A position on the case top. 23. Using your thumbs, press down firmly on the rotary switch knob. The rotary switch knob will snap back into the case top and seat itself on the rotary switch shaft. 24. Turn the Meter OFF. The calibration and adjustment procedure is complete. Proceed to check the AC Amps function. Calibrator 5700A/5720A5500A 5220A 50-Turn Current Coil CAT 200A 200V OFF 200 600V 600A 1000A MAX 600V 600A 1000A CLAMP METER 36 COMV 600V TRUE RMS DC / ACZEROA AC DC MAXDH 20V PK MAX HI LO TC TRIG OUT 1000V RMS MAX 20V RMS MAX 1V PK MAX 20V PK MAX NORMALAUXSCOPE V, , RTD A, -SENSE, AUX V 200V PK MAX Conductor du003f.eps Figure 2. Equipment Connections for Current Calibration Checking the AC Amps Function 11 CAT 200A 200V OFF 200 600V 600A 1000A MAX 600V 600A 1000A DC / ACZEROA Adjust R50 Rotary Switch Knob Press in and down simultaneously du004f.eps Figure 3. Removing the Rotary Switch Knob and Adjusting R50 Checking the AC Amps Function To check the AC Amps function, do the following: 1. Make sure that the Calibrator, Transconductance Amplifier, and Current Coil are connected as shown in Figure 2. 2. Turn the rotary switch to the 600A AC setting. 3. Toggle the DC/AC selector until AC is shown on the display. 4. Clamp the Meter around the Current Coil, taking care to align the conductor with the alignment marks on the jaws of the Meter. 5. Apply 12A ac at 50 or 60 Hz to the Current Coil. The display should read between 594 and 610. If it does not, repeat the DC Amps calibration procedure under Step 6. DC Amps. Completing Reassembly After you have completed the last calibration procedure and checked the AC amps function, do the following: 1. Remove the battery cover screw. 2. Lift off the battery cover and lift out the battery. 3. Reinsert the PCB mounting screw inside the battery compartment. (See Figure 4.) 4. Return the battery to the battery compartment. 5. Put the battery cover back in place, taking care not to pinch the battery leads. 6. Reinsert the battery cover screw. The meter is now ready for normal operation. 36 AC/DC True Rms Clamp Meter 12 Replacement Parts Replacement parts are listed in Table 4 and shown in Figure 4. Table 4. Replacement Parts PartsPart No. Inpu