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5700A/5720A Series II
Service Manual
xiv
2-31. Ohms Main Assembly Simplified Schematic........................................................ 2-111
2-32. Two-Wire Lead Drop Compensatin Circuit .......................................................... 2-114
2-33. Calibration to an External 10 kΩ Standard ........................................................... 2-116
2-34. Ratio Calibration, 10Ω From 100Ω....................................................................... 2-120
2-35. Current Output Simplified Schematic ................................................................... 2-123
2-36. Current Assembly Calibration............................................................................... 2-128
2-37. Wideband Output Assembly Simplified Schematic.............................................. 2-139
3-1. Accessing the Fuse ................................................................................................ 3-4
3-2. Accessing the Air Filter......................................................................................... 3-5
3-3. 732B External Calibration Connections................................................................ 3-9
3-4. 742A-1 and 742A-10k External Calibration Connections .................................... 3-12
3-5. 220V DC Range Calibration Connections............................................................. 3-17
3-6. Wideband Module Calibration Connection........................................................... 3-19
3-7. Overview of Verification Tests ............................................................................. 3-22
3-8. 1 Ohm and 10 Ohm Resistor Verification............................................................. 3-26
3-9. Direct Current Accuracy Test Setup...................................................................... 3-30
3-10. 1 MHz Low Pass Filter.......................................................................................... 3-31
3-11. AC Voltage Test Setup.......................................................................................... 3-32
3-12. Alternating Current Test Setup.............................................................................. 3-35
3-13. Alternating Current Test Setup2 mA and 200 µA................................................. 3-36
3-14. Metal Film Resistor Equivalent Circuit................................................................. 3-37
3-15. Metal Film Resistor in Test Circuit....................................................................... 3-37
3-16. Wideband Accuracy at 1 kHz Test Setup.............................................................. 3-39
3-17. Wideband Flatness Test Setup............................................................................... 3-40
3-18. DC Voltage Linearity Test..................................................................................... 3-43
3-19. DC Voltage Output Noise Test Setup.................................................................... 3-44
3-20. Determining Other Test Limits.............................................................................. 3-49
4-1. Air Filter ................................................................................................................ 4-3
4-2. Rear Panel Removal .............................................................................................. 4-5
4-3. Rear Panel Assembly Access................................................................................. 4-5
4-4. Front Panel Removal ............................................................................................. 4-6
4-5. Analog and Digital Assemblies ............................................................................. 4-8
5-1. Waveform at TP10................................................................................................. 5-42
5-2. Waveform at TP1................................................................................................... 5-43
5-3. Waveform at TP15................................................................................................. 5-44
5-4. Waveform at Pins 14 and 15 of U1 ....................................................................... 5-45
5-5. Waveform at Pin 6 of U9....................................................................................... 5-46
5-6. Waveform at Pin 11 of K2..................................................................................... 5-48
5-7. Waveform at Pin 6 of K2....................................................................................... 5-49
5-8. Verifying the 220 uA Range of the 220 µA/2.2 mA Amp Circuit ........................ 5-49
5-9. Verifying the 2.2 mA Range of the 220 µA/2.2 mA Amp Circuit........................ 5-50
5-10. Verifying the 22 mA Range of the 22 mA/220 mA Amp Circuit......................... 5-50
5-11. Verifying the 220 mA Range of the 22 mA/220 mA Amp Circuit....................... 5-51
5-12. Waveform at Pin 4 of U13..................................................................................... 5-52
5-13. Waveform at TP12................................................................................................. 5-53
5-14. Waveform at TP13................................................................................................. 5-54
5-15. Waveform at TP16................................................................................................. 5-55
5-16. Waveform at Pin 13 of U6..................................................................................... 5-57
5-17. Waveform at TP6................................................................................................... 5-59