Fluke 8842a User Manual Page 144
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- Table of contents
- TROUBLESHOOTING
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Maintenance
PERFORMANCE TEST
6
6-7
6-5. AC Voltage Test (Option -09 Only)
The following procedure may be used to verify the accuracy of the VAC function:
1. Ensure the 8842A is on and warmed up for at least 1 hour.
2. Select the VAC function and the slow (S) reading rate.
3. Connect the AC Calibrator to provide a voltage input to the HI and LO INPUT
terminals.
4. (Low- and Mid-Frequency Test.) For each step in Table 6-3, select the indicated
range, set the AC Calibrator for the specified input, and verify that the displayed
reading is within the limits shown for each reading rate.
NOTE
This procedure tests the extremes of each range. You may shorten the
procedure by testing only the "quick test points" indicated in Table 6-3 with
asterisks.
5. (High-Frequency Test.) For each step in Table 6-4, select the indicated range, set the
AC Calibrator for the specified input, and verify that the displayed reading is within
the limits shown for each reading rate.
NOTE
This procedure tests the extremes of each range. You may shorten the
procedure by testing only the "quick test points" indicated in Table 6-4 with
asterisks.
6. Set the AC calibrator to standby and disconnect it from the 8842A.
Table 6-3. Low- and Mid-Frequency AC Voltage Test
Input Display Readings
Step
Number
Range
Voltage Frequency
Error in
Counts
Minimum Maximum
1 2V 0.01000V 200 Hz 181 0.00819 VAC 0.01181 VAC
2 2V 0.10000V 200 Hz 87 .09913 VAC .10087 VAC
3* 2V 0.30000V 200 Hz 101 0.29899 VAC 0.30101 VAC
4 2V 1.00000V 200 Hz 150 0.99850 VAC 1.00150 VAC
5* 2V 1.90000V 200 Hz 213 1.89787 VAC 1.90213 VAC
6 2V 0.10000V 20 Hz 220 0.09780 VAC 0.10220 VAC
7 2V 1.90000V 20 Hz 2380 1.87620 VAC 1.92380 VAC
8 2V .10000V 45 Hz 135 0.09865 VAC 0.10135 VAC
9 2V 1.90000V 45 Hz 765 1.89235 VAC 1.90765 VAC
10* 200 mV 0.001000V 100 Hz 204 00.796 mVAC 190.252 mVAC
11 200 mV 0.190000V 20 kHz 252 189.748 mVAC 190.252 MvAC
* Quick Test points
- Instruction Manual 1
- Table of Contents 3
- List of Tables 9
- List of Figures 11
- Contents 13
- Chapter 1 15
- 1-1. INTRODUCTION 16
- 1-3. OPTIONS AND ACCESSORIES 16
- 1-4. SPECIFICATIONS 17
- SPECIFICATIONS 19
- Operating Instructions 26
- 2-1. INTRODUCTION 27
- 2-2. INSTALLATION 27
- 2-5. Adjusting the Handle 28
- 2-6. Rack Mounting Kits 28
- 2-7. OPERATING FEATURES 29
- OPERATING FEATURES 30
- Function 31
- 2-10. Display Features 33
- 2-11. Error Messages 33
- 2-12. Overrange Indication 35
- 2-13. Diagnostic Self-Tests 35
- 2-14. Ranging 35
- 2-15. AUTORANGE 35
- 2-16. MANUAL RANGE 36
- 2-17. Triggering 36
- 2-19. EXTERNAL TRIGGER MODE 36
- 2-24. MAKING MEASUREMENTS 38
- 2-29. Offset Measurements 39
- 2-30. EXTERNAL CLEANING 40
- Remote Programming 42
- 3-1. INTRODUCTION 44
- 3-2. CAPABILITIES 44
- 3-3. BUS SET-UP PROCEDURE 44
- 3-5. A NOTE ABOUT EXAMPLES 47
- B1 Offset On 48
- PUT COMMAND FORMAT 49
- N <value> P0 49
- 3-7. Bn (Offset Commands) 50
- 3-9. Dn (Display Commands) 50
- 3-10. Fn (Function Commands) 51
- 3-11. Get Commands 51
- gain calibration 52
- 3-13. G1 (Get SRQ Mask) 53
- DEVICE-DEPENDENT COMMAND SET 54
- 3-17. G5 (Get IAB Status) 55
- 3-18. G6 (Get YW Status) 55
- 3-19. G7 (Get Error Status) 55
- 3-22. Put Commands 56
- 3-24. P1 (Put SRQ Mask) 57
- 3-27. Rn (Range Commands) 58
- 3-32. Yn (Suffix Commands) 60
- 3-33. Z0 (Self-Test Command) 60
- 3-36. INPUT SYNTAX 61
- 3-37. Definitions 62
- 3-38. Input Processing 62
- 200 PRINT @3, "F4" 64
- 300 INPUT @3, A 64
- 200 INPUT @3, A 65
- 300 PRINT @3, "F4" 65
- 200 INPUT @3, A 65
- 3-42. Types of Output Data 66
- 3-44. MEASUREMENT DATA 66
- 3-45. OVERRANGE INDICATION 67
- 3-46. ERROR MESSAGES 67
- 3-47. Status Data 67
- 3-48. Output Priority 67
- 3-49. SERVICE REQUESTS 68
- 3-51. The SRQ Mask 69
- 3-52. INTERFACE MESSAGES 70
- 3-56. TALK-ONLY MODE 71
- 3-57. REMOTE CALIBRATION 72
- 3-58. TIMING CONSIDERATIONS 72
- 3-59. IMMEDIATE MODE COMMANDS 72
- 3-60. EXAMPLE PROGRAMS 73
- EXAMPLE PROGRAMS 74
- (interface clear) 91
- 4-1. INTRODUCTION 93
- 4-2. DC VOLTAGE MEASUREMENT 93
- DC VOLTAGE MEASUREMENT 94
- 4-5. RESISTANCE MEASUREMENT 95
- 4-8. 4-Wire Ohms 96
- 4-10. TESTING DIODES 98
- 4-13. DC CURRENT MEASUREMENT 99
- Measurement Tutorial 100
- REDUCING THERMAL VOLTAGES 100
- 4-16. True RMS Measurement 101
- 4-17. Waveform Comparison 101
- 4-18. Crest Factor 103
- 4-21. Bandwidth 104
- 4-22. Zero-Input VAC Error 104
- MEASUREMENTS 106
- Theory of Operation 108
- 5-1. INTRODUCTION 110
- 5-4. DC SCALING 111
- DC SCALING 112
- 5-5. VDC Scaling 113
- 5-6. VDC Protection 114
- 5-7. mA DC Scaling 114
- 5-8. Analog Filter 114
- 5-9. TRACK/HOLD CIRCUIT 115
- TRACK/HOLD CIRCUIT 116
- 5-10. Track Configuration 117
- 5-11. Settling Configuration 118
- 5-12. Hold Configuration 118
- 5-15. OHMS CURRENT SOURCE 119
- 5-16. OHMS PROTECTION 120
- 5-17. OHMS FUNCTIONS 120
- 5-20. A/D CONVERTER 122
- 5-21. Timing/Data Control 124
- 5-22. Precision DAC 124
- 5-25. DISPLAY 125
- 5-26. KEYBOARD 126
- 5-27. DIGITAL CONTROLLER 126
- 5-28. In-Guard Microcomputer 128
- 5-31. Calibration Correction 130
- 5-35. GUARD CROSSING 131
- 5-36. POWER SUPPLY 132
- 5-38. Out-Guard Microcomputer 133
- 5-39. Guard Crossing 133
- 5-41. Signal Conditioning 134
- 5-44. VAC Scaling 134
- 5-45. mA AC Scaling 135
- A Message From 136
- PORTIONS REPRINTED 137
- Maintenance 138
- 6-1. INTRODUCTION 140
- 6-2. PERFORMANCE TEST 141
- local control 142
- PERFORMANCE TEST 144
- 6-6. Resistance Test 145
- 2 = 4 ½ digit counts 146
- 6-9. CALIBRATION 147
- 6-11. INITIAL PROCEDURE 148
- • Autoranging 149
- CALIBRATION 150
- 6-18. VERIFYING CALIBRATION 154
- 6-20. TOLERANCE CHECK 155
- 6-23. Remote Calibration 157
- 6-24. TIMING CONSIDERATIONS 160
- 6-25. REMOTE ERASURE 161
- 6-27. DISASSEMBLY PROCEDURE 162
- 6-28. Case Removal 163
- DISASSEMBLY PROCEDURE 164
- 6-31. Main PCA Removal 167
- 6-33. REASSEMBLY PROCEDURE 169
- REASSEMBLY PROCEDURE 170
- 05 Only) 173
- 6-36. TROUBLESHOOTING 173
- TROUBLESHOOTING 174
- 6-38. Diagnostic Self-Tests 178
- 6-39. Self-Test Descriptions 179
- 6-48. DISPLAY SYSTEM 185
- 6-59. ANALOG CONTROL SIGNALS 188
- 00000 11111 000000 000000 0 1 191
- 6-69. SERVICE POSITION 201
- 6-70. DIAGNOSTIC PROGRAM 201
- 6-72. SERVICE POSITION 203
- 6-73. MAJOR PROBLEMS 204
- 6-74. MORE OBSCURE PROBLEMS 206
- 6-76. INTERNAL CLEANING 207
- INTERNAL CLEANING 208
- List of Replaceable Parts 210
- 7-1. INTRODUCTION 212
- 7-2. HOW TO OBTAIN PARTS 212
- 7-4. NEWER INSTRUMENTS 213
- 7-5. SERVICE CENTERS 213
- SERVICE CENTERS 214
- Options and Accessories 230
- 8-1. INTRODUCTION 232
- 8-2. ACCESSORIES 233
- 8-10. Current Shunt (80J-10) 234
- Option –05 IEEE-488 Interface 236
- 805-3. EXTERNAL CONTROLS 238
- 805-4. INSTALLATION 238
- 805-1. INTRODUCTION 238
- 805-2. CAPABILITIES 238
- 805-6. MAINTENANCE 239
- LIST OF REPLACEABLE PARTS 240
- Option –09 True RMS AC 244
- 809-1. INTRODUCTION 246
- 809-2. INSTALLATION 246
- 809-3. OPERATING INSTRUCTIONS 247
- 809-4. MAINTENANCE 247
- Schematic Diagrams 252
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