Fluke 43B Service 电路图.pdf

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1、 43B Power Quality Analyzer Service Manual 4822 872 05385 December 2001 2001 Fluke Corporation, All rights reserved. Printed in the Netherlands All product names are trademarks of their respective companies. RadioFans.CN 收音机爱 好者资料库 SERVICE CENTERS To locate an authorized service center, visit us on

2、the World Wide Web: or call Fluke using any of the phone numbers listed below: +1-888-993-5853 in U.S.A. and Canada +31-402-678-200 in Europe +1-425-446-5500 from other countries RadioFans.CN 收音机爱 好者资料库 i Table of Contents ChapterTitlePage 1Safety Instructions. 1-1 1.1 Introduction. 1-3 1.2 Safety P

3、recautions. 1-3 1.3 Caution and Warning Statements. 1-3 1.4 Symbols. 1-3 1.5 Impaired Safety. 1-4 1.6 General Safety Information. 1-4 2Characteristics . 2-1 2.1 Introduction. 2-3 2.2 Safety Specifications. 2-3 2.3 Function Specifications. 2-4 2.3.1 Electrical functions. 2-4 2.3.2 Scope. 2-5 2.3.3 Me

4、ter. 2-7 2.3.4 Record. 2-7 2.4 Miscellaneous . 2-8 2.5 Current Probe. 2-8 2.6 Environmental Conditions . 2-9 2.7 Electromagnetic Immunity. 2-10 3Circuit Descriptions . 3-1 3.1 Introduction. 3-3 3.2 Block Diagram. 3-3 3.2.1 Input 1 - Input 2 Measurement Circuits. 3-3 3.2.2 Trigger Circuit. 3-5 3.2.3

5、Digital Circuit. 3-5 3.2.4 Power Circuit. 3-6 3.2.5 Start-up Sequence, Operating Modes. 3-7 3.3 Detailed Circuit Descriptions. 3-9 3.3.1 Power Circuit. 3-9 3.3.2 Input 1 - Input 2 Measurement Circuits. 3-14 3.3.3 Trigger Circuit. 3-20 RadioFans.CN 收音机爱 好者资料库 43B Service Manual ii 3.3.4 Digital Circu

6、it. 3-24 4Performance Verification. 4-1 4.1 Introduction. 4-3 4.2 Equipment Required For Verification . 4-3 4.3 How To Verify. 4-3 4.4 Display and Backlight Test. 4-4 4.5 Input 1 and Input 2 Tests in the SCOPE MODE. . 4-5 4.5.1 Input 1 Trigger Sensitivity Test. 4-6 4.5.2 Input 1 Frequency Response U

7、pper Transition Point Test. 4-7 4.5.3 Input 1 Frequency Measurement Accuracy Test. 4-7 4.5.4 Input 2 Frequency Measurement Accuracy Test. 4-9 4.5.5 Input 2 Trigger Level and Trigger Slope Test. 4-10 4.5.6 Input 2 Trigger sensitivity Test. 4-12 4.5.7 Input 1 Trigger Level and Trigger Slope Test. 4-13

8、 4.5.8 Input 1 and 2 DC Voltage Accuracy Test. 4-15 4.5.9 Input 1 and 2 AC Voltage Accuracy Test. 4-17 4.5.10 Input 1 and 2 AC Input Coupling Test . 4-19 4.5.11 Input 1 and 2 Volts Peak Measurements Test . 4-20 4.5.12 Input 1 and 2 Phase Measurements Test. 4-21 4.5.13 Input 1 and 2 High Voltage AC 5

9、0 V; 500 V; 1250 V minimum step.1 mV; 10 mV; 100 mV; 1 V (1 % + 10 counts) Current ranges (auto).50.00 A to 500.0 kA, 1250 kA minimum step.10 mA; 0.1 A; 1 A; 100 A, 1 kA (1 % + 10 counts) Frequency range .10.0 Hz to 15.0 kHz 40.0 to 70.0 Hz.(0.5 % + 2 counts) resolution. 0.1 Hz; 1 Hz; 10 Hz; 100 Hz

10、CF Crest Factor range.1.0 to 10.0 (5 % + 1 count) Power (1 and 3 phase / 3 conductor / balanced loads) Readings .Watt, VA, VAR, PF, DPF, Hz Watt, VA, VAR ranges (auto).250 W to 250 MW, 625 MW, 1.56 GW when selected: total ( %r):.(2 % + 6 counts) when selected: fundamental ( %f):.(4 % + 4 counts) DPF

11、.0.00 to 1.00 0.00 to 0.25.not specified 0.25 to 0.90. 0.04 0.90 to 1.00. 0.03 Characteristics 2.3 Function Specifications2 2-5 PF.0.00 to 1.00 0.04 Frequency range .10.0 Hz to 15.0 kHz 40.0 to 70.0 Hz.(0.5 % + 2 counts) Harmonics Number of harmonics.DC.21, DC.33, DC.51 Readings / Cursor readings Vr

12、ms.fund. (3 % + 2 counts) .31st (5 % + 3 counts).51st (15 % + 5 counts) Irms.fund. (3 % + 2 counts) .31st (5 % + 3 counts).51st (15 % + 5 counts) Watt.fund. (5 % + 10 counts).31st (10 % + 10 counts) 51st (30 % + 5 counts) Frequency of fundamental. 0.25 Hz Phase.fund. 3 . 51st 15 K-factor (in Amp and

13、 Watt). 10 % Sags so only one of these functions needs to be verified. 4.2 Equipment Required For Verification The primary source instrument used in the verification procedures is the Fluke 5500A. If a 5500A is not available, you can substitute another calibrator as long as it meets the minimum test

14、 requirements. Power Quality Option 5520A-PQ is not strictly necessary for the tests in this chapter, but it offers useful test signals to test modes such as Harmonics and Sags the test pattern as shown in Figure 4-1 may not be visible or hardly visible. Observe the display closely, and verify that

15、no light pixels are shown. Figure 4-1. Display Pixel Test Pattern Performance Verification 4.5 Input 1 and Input 2 Tests in the SCOPE MODE.4 4-5 11. Press . The test pattern is removed; the test tool shows Contrast (CL 0110):MANUAL 12. Press (CAL) . The test tool shows the display test pattern shown

16、 in Figure 4-1, at default contrast. Observe the test pattern closely, and verify that the no pixels with abnormal contrast are present in the display pattern squares. Also verify that the contrast of the upper left and upper right square of the test pattern are equal. 13. Press . The test pattern i

17、s removed; the test tool shows Contrast (CL 0120):MANUAL 14. Press (CAL) . The test tool shows a light display; the test pattern as shown in Figure 4-1 may not be visible or hardly visible. Observe the display closely, and verify that no dark pixels are shown. 15. Press twice to turn the test tool O

18、FF and ON to exit the calibration menu and to return to the normal operating mode. 4.5 Input 1 and Input 2 Tests in the SCOPE MODE. Before performing the Input 1 and Input 2 tests, the test tool must be set in a defined state, by performing a RESET. Proceed as follows to reset the test tool: Press t

19、o turn the test tool off. Press and hold . Press and release to turn the test tool on. Wait until the test tool has beeped twice, and then release When the test tool has beeped twice, the RESET was successful. Now you must select the SCOPE MODE. Press to leave the STARTUP screen. Press . Press up-do

20、wn till SCOPE is highlighted. Press to select SCOPE mode. 43B Service Manual 4-6 4.5.1 Input 1 Trigger Sensitivity Test Proceed as follows to test the Input 1 trigger sensitivity: 1. Connect the test tool to the 5500A as shown in Figure 4-2. ST8004.WMF Figure 4-2. Test Tool Input 1 to 5500A Scope Ou

21、tput 50 2. Select the AUTO test tool setup: Press to select the MENU. Press till SCOPE is highlighted. Press to select SCOPE mode. 3. Select timebase of 100 ns/d. Press to select RANGE. Press to select 100 ns/d. 4. Select sensitivity of 200 mV/d. Press to select 200 mV/d. 5. Set the 5500A to source

22、a 5 MHz leveled sine wave of 100 mV peak-to-peak (SCOPE output, MODE levsine). 6. Verify that the signal is well triggered , if necessary adjust the trigger level (see 7). 7. Adjusting trigger level. Press to highlight TRIGGER, then press to adjust the trigger level. 8. Set the 5500A to source a 25

23、MHz leveled sine wave of 400 mV peak-to-peak. 9. Select timebase of 20 ns/d. Press to select RANGE. Press to select 20 ns/d. 10. Verify that the signal is well triggered , if necessary adjust the trigger level (see 7). 11. Set the 5500A to source a 40 MHz leveled sine wave of 1.8V peak-to-peak. 12.

24、Verify that the signal is well triggered, if necessary adjust the trigger level (see 7). 13. When you are finished, set the 5500A to Standby. Performance Verification 4.5 Input 1 and Input 2 Tests in the SCOPE MODE.4 4-7 4.5.2 Input 1 Frequency Response Upper Transition Point Test Proceed as follows

25、 to test the Input 1 frequency response upper transition point: 1. Connect the test tool to the 5500A as for the previous test (see Figure 4-2). 2. Select the AUTO test tool setup: Press to select the MENU. Press till SCOPE is highlighted. Press to select SCOPE mode 3. Select the following test tool

26、 setup: Press to select menu SCOPE SETUP. Press to highlight Input 1 Reading Press to go to Input 1 READING. Press to highlight AC + DCrms. Press to confirm; ? mark changes to I Press to highlight Input 1 Coupling. Press to select the Input 1 Coupling menu. Press to highlight DC Coupling. Press to c

27、onfirm; ? mark changes to I. Press to return to SCOPE. 4. Set the 5500A to source a leveled sine wave of 1.2V peak-to-peak, 50 kHz (SCOPE output, MODE levsine). 5. Adjust the amplitude of the sine wave to a reading of 424 mV 8 mV. 6. Set the 5500A to 20 MHz, without changing the amplitude. 7. Observ

28、e the Input 1 trace and check the reading is 297 mV. 8. When you are finished, set the 5500A to Standby. Note The lower transition point is tested in Section 4.5.9. 4.5.3 Input 1 Frequency Measurement Accuracy Test Proceed as follows to test the Input 1 frequency measurement accuracy: 1. Connect the

29、 test tool to the 5500A as for the previous test (see Figure 4-2). 2. Select the AUTO test tool setup: Press to select the MENU. Press till SCOPE is highlighted Press to select SCOPE mode. 43B Service Manual 4-8 3. Select the following test tool setup: Press to select menu SCOPE SETUP. Press to high

30、light Input 1 coupling. Press to select the Input 1 coupling menu. Press to highlight DC Coupling. Press to confirm; ? mark changes to I Press to highlight Input 1 Reading Press to go to Input 1 READING. Press to highlight Hz. Press to confirm; ? mark changes to I. Press to return to SCOPE. 4. Set t

31、he 5500A to source a leveled sine wave of 600 mV peak-to-peak (SCOPE output, MODE levsine). 5. Set the 5500A frequency according to the first test point in Table 4-1. 6. Observe the Input 1 Reading on the test tool and check to see if it is within the range shown under the appropriate column. 7. Con

32、tinue through the test points. 8. When you are finished, set the 5500A to Standby. Table 4-1. Input 1 Frequency Measurement Accuracy Test 5500A output, 600 mVppInput 1 Reading 1 MHz0.98 to 1.03 MHz 10 MHz09.7 to 10.3 MHz 40 MHz38.8 to 41.2 MHz Note Duty Cycle and Pulse Width measurements are based on the same principles as Frequency measurements. Therefore the Duty Cycle and Pulse Width measurement function will not be verified separately. Performance Verification 4.5 Input 1 and Input 2 Tests in the SCOPE MODE.4 4-9 4.5.4 Input 2 Frequency