FLUKE 123_125_smeng0000 电路图.pdf

Fluke 123/124/125 Industrial ScopeMeter Service Manual 4822 872 05398 March 2007 2007 Fluke Corporation, All rights reserved. All product names are trademarks of their respective companies. RadioFans.CN 收音机爱 好者资料库 Limited Warranty adjust the trigger level and verify that the signal will be triggered now. The trigger level is indicated by the trigger icon (). 6. Set the 5500A to source a 25 MHz (Fluke 123) or 40 MHz (Fluke 124/125) leveled sine wave of 400 mV peak-to-peak. 7. Adjust the amplitude of the sine wave 1.5 divisions on the test tool display. 8. Verify that the signal is well triggered. If it is not, press to enable the up/down arrow keys for Trigger Level adjustment; adjust the trigger level and verify that the signal will be triggered now. 9. Set the 5500A to source a 40 MHz (Fluke 123) or 60 MHz (Fluke 124/125) leveled sine wave of 1.8V peak-to-peak. 10. Adjust the amplitude of the sine wave to exactly 4 divisions on the test tool display. 11. Verify that the signal is well triggered. If it is not, press to enable the up/down arrow keys for Trigger Level adjustment; adjust the trigger level and verify that the signal will be triggered now. Performance Verification 3.5 Input A and Input B Tests 3 3-13 12. When you are finished, set the 5500A to Standby. 3.5.8 Input A and B Trigger Level and Trigger Slope Test Proceed as follows: 1. Connect the test tool to the 5500A as shown in Figure 3-5. ST8001.WMF Figure 3-5. Test Tool Input A-B to 5500A Normal Output 2. Select the following test tool setup: Turn Input B on ( if not already on). Using change the sensitivity to select manual sensitivity ranging, and lock the Input A and Input B sensitivity on 1V/div. Move the Input A and Input B ground level (indicated by zero icon ) to the center grid line. Proceed as follows: Press to enable the arrow keys for moving the Input A ground level. Press to enable the arrow keys for moving the Input B ground level. Using the keys move the ground level. Using change the time base to select manual time base ranging, and lock the time base on 10 ms/div. Fluke 123/124: press / to open the SCOPE INPUTS menu. Fluke 123/124: press to open the TRIGGER menu, and choose: INPUT: ? A | SCREEN UPDATE: ? FREE RUN | AUTO RANGE: ? 15Hz Fluke 125: press to open MENU. Fluke 125: press to open the TRIGGER menu, and choose : INPUT: ? A | UPDATE: ? FREE RUN | AUTO RANGE: ? 15Hz Press to enable the arrow keys for Trigger Level and Slope adjustment. Fluke 123/124/125 Service Manual 3-14 Using select positive slope triggering (trigger icon ). Using set the trigger level to +2 divisions from the screen center. For positive slope triggering, the trigger level is the top of the trigger icon (). Fluke 123/124: press / to open the SCOPE INPUTS menu. Fluke 123/124: press to open the SCOPE OPTIONS menu, and choose : SCOPE MODE: ? SINGLE SHOT | WAVEFORM MODE: ? NORMAL Fluke 125: press to open MENU. Fluke 125: press to open the TRIGGER menu, and choose : UPDATE: ? SINGLE Fluke 125: press to open the SMOOTH menu, and choose : WAVEFORM: ? NORMAL 3. Set the 5500A to source 0.4V DC and to OPR. 4. Verify that no trace is shown on the test tool display, and that the status line at the display bottom shows Wait:A . If the display shows the traces and status Hold:A , then press to re-arm the test tool for a trigger. 5. Increase the 5500A voltage slowly in 0.1V steps, using the 5500A EDIT FIELD function, until the test tool is triggered, and the traces are shown. 6. Verify that the 5500A voltage is between +1.5V and +2.5V when the test tool is triggered. To repeat the test, start at step 3. 7. Set the 5500A to Standby. 8. Press to clear the display. 9. Press to enable the arrow keys for Trigger Level and Slope adjustment. 10. Using select negative slope triggering ( ). 11. Using set the trigger level to +2 divisions from the screen center. For negative slope triggering, the trigger level is the bottom of the trigger icon (). 12. Set the 5500A to source +3V DC and to OPR. 13. Verify that no trace is shown on the test tool display, and that the status line at the display bottom shows Wait:A. If the display shows the traces and status Hold:A, then press to re-arm the test tool for a trigger. 14. Decrease the 5500A voltage slowly in 0.1V steps, using the 5500A EDIT FIELD function, until the test tool is triggered, and the traces are shown. 15. Verify that the 5500A voltage is between +1.5V and +2.5V when the test tool is triggered. To repeat the test, start at step 12. 16. Set the 5500A to Standby. 17. Press to clear the display. Performance Verification 3.5 Input A and Input B Tests 3 3-15 18. Select the following test tool setup: Fluke 123/124: press / to open the SCOPE INPUTS menu. Fluke 123/124: press to open the TRIGGER menu, and choose: INPUT: ? A | SCREEN UPDATE: ? FREE RUN | AUTO RANGE: ? 15Hz Fluke 125: press to open MENU. Fluke 125: press to open the TRIGGER menu, and choose : INPUT: ? A | UPDATE: ? FREE RUN | AUTO RANGE: ? 15Hz Press to enable the arrow keys for Trigger Level and Slope adjustment. Using select positive slope triggering (trigger icon ). Using set the trigger level to +2 divisions from the screen center. For positive slope triggering, the trigger level is the top of the trigger icon (). 19. Set the 5500A to source 0.4V DC and to OPR. 20. Verify that no trace is shown on the test tool display, and that the status line at the display bottom shows Wait:B . If the display shows the traces and status Hold:B , then press to re-arm the test tool for a trigger. 21. Increase the 5500A voltage slowly in 0.1V steps, using the 5500A EDIT FIELD function, until the test tool is triggered, and the traces are shown. 22. Verify that the 5500A voltage is between +1.5V and +2.5V when the test tool is triggered. To repeat the test, start at step 19. 23. Set the 5500A to Standby. 24. Press to clear the display. 25. Press to enable the arrow keys for Trigger Level and Slope adjustment. 26. Using select negative slope triggering ( ). 27. Using set the trigger level to +2 divisions from the screen center. For negative slope triggering, the trigger level is the bottom of the trigger icon (). 28. Set the 5500A to source +3V DC and to OPR. 29. Verify that no trace is shown on the test tool display, and that the status line at the display bottom shows Wait:B. If the display shows the traces and status Hold:B, then press to re-arm the test tool for a trigger. 30. Decrease the 5500A voltage in 0.1V steps, using the 5500A EDIT FIELD function, until the test tool is triggered, and the traces are shown. 31. Verify that the 5500A voltage is between +1.5V and +2.5V when the test tool is triggered. To repeat the test, start at step 28. 32. When you are finished, set the 5500A to Standby. Fluke 123/124/125 Service Manual 3-16 3.5.9 Input A and B DC Voltage Accuracy Test WARNING Dangerous voltages will be present on the calibration source and connecting cables during the following steps. Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool. Proceed as follows: 1. Connect the test tool to the 5500A as for the previous test (see Figure 3-5). 2. Select the following test tool setup: Press select auto ranging (AUTO in top of display). Press to open the INPUT A MEASUREMENTS menu, and choose: MEASURE on A: ? Vdc Press to open the INPUT B MEASUREMENTS menu, and choose: INPUT B: ? ON | MEASURE on B: ? Vdc Using change the time base to select manual time base ranging, and lock the time base on 10 ms/div. Fluke 123/124: press / to open the SCOPE INPUTS menu. Fluke 123/124: press to open the SCOPE OPTIONS menu, and choose : SCOPE MODE: ? NORMAL | WAVEFORM MODE: ? SMOOTH Fluke 125: press to open MENU. Fluke 125: press to open the TRIGGER menu, and choose : UPDATE: ? FREE RUN Fluke 125: press to open the SMOOTH menu, and choose : WAVEFORM: ? SMOOTH Move the Input A and Input B ground level (indicated by zero icon ) to the center grid line. Proceed as follows: Press to enable the arrow keys for moving the Input A ground level. Press to enable the arrow keys for moving the Input B ground level. Using the keys move the ground level. 3. Using set the Input A and B sensitivity to the first test point in Table 3-2. The corresponding range is shown in the second column of the table. 4. Set the 5500A to source the appropriate DC voltage. Set the 5500A to Operate (OPR). 5. Observe the main reading and check to see if it is within the range shown under the appropriate column. Performance Verification 3.5 Input A and Input B Tests 3 3-17 6. Continue through the test points. 7. When you are finished, set the 5500A to 0 (zero) Volt, and to Standby. Table 3-2. Volts DC Measurement Verification Points Sensitivity (Oscilloscope) Range 1) (Meter) 5500A output, V DC Input A-B DC Reading 5 mV/div 500 mV 15 mV 014.4 to 015.6 2) 10 mV/div 500 mV 30 mV 029.3 to 030.7 2) 20 mV/div 500 mV 60 mV 059.2 to 060.8 50 mV/div 500 mV 150 mV 148.7 to 151.3 100 mV/div 500 mV 300 mV 298.0 to 302.0 200 mV/div 500 mV 500 mV 497.0 to 503.0 -500 mV -497.0 to -503.0 0 mV -000.5 to + 000.5 500 mV/div 5V 1.5V 1.487 to 1.513 1 V/div 5V 3V 2.980 to 3.020 2 V/div 5V 5V 4.970 to 5.030 -5V -4.970 to -5.030 0V -0.005 to +0.005 5 V/div 50V 15V 14.87 to 15.13 10 V/div 50V 30V 29.80 to 30.20 20 V/div 50V 50V 49.70 to 50.30 -50V -49.70 to -50.30 0V -00.05 to +00.05 50 V/div 500V 150V 148.7 to 151.3 100 V/div 500V 300V 298.0 to 302.0 1) The 500V and 1250V range will be tested in Section 3.5.14 2) Due to calibrator noise, occasionally OL (overload) can be shown. Fluke 123/124/125 Service Manual 3-18 3.5.10 Input A and B AC Voltage Accuracy Test Warning Dangerous voltages will be present on the calibration source and connecting cables during the following steps. Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool. Proceed as follows to test the Input A and B AC Voltage accuracy: 1. Connect the test tool to the 5500A as for the previous test (see Figure 3-5). 2. Select the following test tool setup: Press to select auto ranging (AUTO in top of display). Do not press anymore! Press to open the INPUT A MEASUREMENTS menu, and choose: MEASURE on A: ? Vac Press to open the INPUT B MEASUREMENTS menu, and choose: INPUT B: ? ON | MEASURE on B: ? Vac Move the Input A and Input B ground level (indicated by zero icon ) to the center grid line. Proceed as follows: Press to enable the arrow keys for moving the Input A ground level. Press to enable the arrow keys for moving the Input B ground level. Using the keys move the ground level. 3. Using set the Input A and B sensitivity to the first test point in Table 3-3. The corresponding range is shown in the second column of the table. 4. Set the 5500A to source the required AC voltage (NORMAL output, WAVE sine). Set the 5500A to Operate (OPR). 5. Observe the Input A and Input B main reading and check to see if it is within the range shown under the appropriate column. 6. Continue through the test points. 7. When you are finished, set the 5500A to Standby. Performance Verification 3.5 Input A and Input B Tests 3 3-19 Table 3-3. Volts AC Measurement Verification Points Sensitivity (Oscilloscope) Range 1) (Meter) 5500A output Volts rms 5500A Frequency Reading A-B 200 mV/div 500 mV 500 mV 60 Hz 494.0 to 506.0 500 mV 20 kHz 486.0 to 514.0 2V/div 5V 5V 20 kHz 4.860 to 5.140 5V 60 Hz 4.940 to 5.060 20V/div 50V 50V 60 Hz 49.40 to 50.60 50V 20 kHz 48.60 to 51.40 1) The 500V and 1250V range will be tested in Section 3.5.14 3.5.11 Input A and B AC Input Coupling Test Proceed as follows to test the Input A and B AC coupled input lower transition point: 1. Connect the test tool to the 5500A as for the previous test (see Figure 3-5). 2. Select the following test tool setup: Use the setup of the previous step (AUTO time base, traces at vertical center). Using select 200 mV/div for Input A and B (500 mV range). Fluke 123/124: press / to open the SCOPE INPUTS menu, and choose: INPUT A: ? AC | ? NORMAL | INPUT B: ? AC | NORMAL? Fluke 123/124: press / to open the SCOPE INPUTS menu. Fluke 123/124: press to open the TRIGGER menu, and choose: INPUT: A | SCREEN UPDATE: ? FREE RUN | AUTO RANGE: ? 1Hz Fluke 125: press to open the A MEASUREMENTS menu, and choose: Fluke 125: press to open the A INPUT menu, and choose: INPUT A: ? AC | ? NORMAL Fluke 125: press to open the B MEASUREMENTS menu, and choose: Fluke 125: press to open the B INPUT menu, and choose: INPUT B: ? AC | NORMAL? Fluke 125: press to open MENU. Fluke 125: press to open the TRIGGER menu, and choose: UPDATE: ? FREE RUN | AUTO RANGE: ? 1Hz 3. Set the 5500A to source an AC voltage, to the first test point in Table 3-4 (NORMAL output, WAVE sine). Set the 5500A to Operate (OPR). Fluke 123/124/125 Service Manual 3-20 4. Observe the Input A and Input B main reading and check to see if it is within the range shown under the appropriate column. 5. Continue through the test points. 6. When you are finished, set the 5500A to Standby. Table 3-4. Input A and B AC Input Coupling Verification Points 5500A output, V rms 5500A Frequency Reading A-B 500.0 mV 10 Hz 344.0 500.0 mV 33 Hz 469.0 500.0 mV 60 Hz 486.5 3.5.12 Input A and B Volts Peak Measurements Test WARNING Dangerous voltages will be present on the calibration source and connecting cables during the following steps. Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool. Proceed as follows to test the Volts Peak measurement function: 1. Connect the test tool to the 5500A as for the previous test (see Figure 3-5). 2. Select the following test tool setup: Fluke 123/124: press / to open the SCOPE INPUTS menu. Fluke 123/124: press to open the TRIGGER menu, and choose: INPUT: A | SCREEN UPDATE: ? FREE RUN | AUTO RANGE: ? 15Hz Fluke 125: press to open MENU. Fluke 125: press to open the TRIGGER menu, and choose : INPUT: A | UPDATE: ? FREE RUN | AUTO RANGE: ? 15Hz Press to select auto ranging (AUTO in top of display). Press to open the INPUT A MEASUREMENTS menu, and choose: MEASURE on A: ? PEAK From the INPUT A PEAK sub-menu choose: PEAK TYPE : ? PEAK-PEAK Press to open the INPUT B MEASUREMENTS menu, and choose: INPUT B: ? ON | MEASURE on B: ? PEAK From the INPUT B PEAK sub-menu choose: Performance Verification 3.5 Input A and Input B Tests 3 3-21 PEAK TYPE : ? PEAK-PEAK Using select 1V/div for input A and B. 3. Set the 5500A to source a sine wave, to the first test point in Table 4-5 (NORMAL output, WAVE sine). Set the 5500A to Operate (OPR). 4. Observe the Input A and Input B main r