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®
8842A
Digital Multimeter
Instruction Manual
PN 879309
Date December 1991
Rev.3 7/96
© 1999 Fluke Corporation, All rights reserved. Printed in USA
All product names are trademarks of their respective companies.
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Table of Contents Chapter Title Page 1 Introduction and Specifications........................................................ 1-1 1-1. INTRODUCTION................................................................................ 1-2 1-2. THE 8842A DIGITAL MULTIMETER .............................................. 1-2 1-3. OPTIONS AND ACCESSORIES........................................................ 1-2 1-4. SPECIFICATIONS .........................................................................
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8842A Instruction Manual 2-28. Current Fuse Protection.................................................................... 2-13 2-29. Offset Measurements ....................................................................... 2-14 2-30. EXTERNAL CLEANING.................................................................... 2-15 3 Remote Programming........................................................................ 3-1 3-1. INTRODUCTION..........................................................
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Contents (continued) 3-50. The Serial Poll Register ................................................................... 3-27 3-51. The SRQ Mask................................................................................. 3-28 3-52. INTERFACE MESSAGES .................................................................. 3-29 3-53. Address Messages ............................................................................ 3-29 3-54. Universal Commands............................................
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8842A Instruction Manual 5-15. OHMS CURRENT SOURCE .............................................................. 5-12 5-16. OHMS PROTECTION......................................................................... 5-13 5-17. OHMS FUNCTIONS ........................................................................... 5-13 5-18. 2-Wire Ohms.................................................................................... 5-13 5-19. 4-Wire Ohms.......................................................
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Contents (continued) 6-20. TOLERANCE CHECK ............................................................... 6-18 6-21. AC CALIBRATION AT OTHER FREQUENCIES ................... 6-19 6-22. OPTIMIZING USE OF THE 5450A........................................... 6-19 6-23. Remote Calibration .......................................................................... 6-20 6-24. TIMING CONSIDERATIONS ................................................... 6-23 6-25. REMOTE ERASURE.............................
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8842A Instruction Manual 8-5. Replacement Test Leads (TL70A) ................................................... 8-4 8-6. Deluxe Test Lead Kits (Y8134) ....................................................... 8-4 8-7. Slim-Flex Test Leads (Y8140)......................................................... 8-4 8-8. Temperature Probes (80T-150U, and 80TK.) .................................. 8-4 8-9. RF Probes (85RF and 83RF)............................................................ 8-4 8-10. Current
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List of Tables Table Title Page 2-1. Error Codes............................................................................................................ 2-9 2-2. Input Overload Limits............................................................................................ 2-13 3-1. Status Data ............................................................................................................. 3-11 3-2. Numeric Output Data Format ...................................................
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8842A Instruction Manual 6-27. AC Signal Tracing ................................................................................................. 6-68 6-28. Truth Table for U804 and K2 ................................................................................ 6-69 7-1. 8842A Digital Multimeter...................................................................................... 7-5 7-2. A1 Main PCA ...........................................................................................
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List of Figures Figure Title Page 1-1. External Dimensions.............................................................................................. 1-11 2-1. Line Voltage Selection Settings............................................................................. 2-2 2-2. Adjusting the Handle ............................................................................................. 2-3 2-3. Rack-Mount Kits................................................................................
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8842A Instruction Manual 4-12. Leakage Resistance in High Resistance Measurement .......................................... 4-16 5-1. Overall Functional Block Diagram........................................................................ 5-5 5-2. DC Scaling (VDC and mA DC)............................................................................. 5-6 5-3. Track/Hold Amplifier ............................................................................................ 5-8 5-4. Track/Hold Circu
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Contents (continued) 9-7. IEEE-488 Interface PCA, Option -05 .................................................................... 9-15 9-8. True RMS AC PCA, Option -09............................................................................ 9-17 xi
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8842A Instruction Manual xii
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Chapter 1 Introduction and Specifications Title Page 1-1. INTRODUCTION................................................................................1-2 1-2. THE 8842A DIGITAL MULTIMETER ..............................................1-2 1-3. OPTIONS AND ACCESSORIES........................................................1-2 1-4. SPECIFICATIONS ..............................................................................1-3 1-1
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8842A Instruction Manual 1-1. INTRODUCTION This manual provides complete operating instructions and service information for the 8842A. If you want to get started using your 8842A right away, proceed to the operating instructions in Section 2. If you intend to use the 8842A with the IEEE-488 Interface (Option -05), read Sections 2 and 3. This meter has been designed and tested according to IEC publication 348, Safety Requirements for Electronic Measuring Apparatus. This manual contains informatio
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Introduction and Specifications SPECIFICATIONS 1 1-4. SPECIFICATIONS Specifications for the 8842A are given in Table 1-1. External dimensions are shown in Figure 1-1. Table 1-1. Specifications DC VOLTAGE Input Characteristics FULL SCALE 5ñ RESOLUTION INPUT DIGITS RESISTANCE RANGE 5ñ DIGITS 4ñ DIGITS* 20 mV 19.9999 mV 0.1μV1 μV ≥10,000 MΩ 200 mV 199.999 mV 1μV 10 μV ≥10,000 MΩ 2V 1.99999V 10 μV 100 μV ≥10,000 MΩ 20V 19.9999V 100 μV1 mV ≥10,000 MΩ 200V 199.999V 1 mV 10 mV 10 MΩ 1000V 1000.00V 10 m
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8842A Instruction Manual Operating Characteristics TEMPERATURE COEFFICIENT ...........<(0.0006% of reading + 0.3 Count) per °C from 0°C to 18°C and 28°C to 50°C. MAXIMUM INPUT...................................1000V dc or peak ac on any range. NOISE REJECTION................................Automatically optimized at power-up for 50, 60, or 400 Hz. RATE READINGS/ FILTER NMRRï PEAK NM CMRRð SECONDî SIGNAL S 2.5 Analog & Digital >98 dB 20V or 2x FS >140 dB M 20 Digital >45 dB 1x FS >100 dB F 1
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Introduction and Specifications SPECIFICATIONS 1 Accuracy NORMAL (s) READING RATE .............. ±(% of Reading + Number of Counts). 1 For sinewave inputs ≥10,000 counts . 2 FREQUENCY 24 HOURS 23±1°C 90 DAY 23±5°C 1 YEAR 23±5°C 2 YEARS ±5°C 20-45 1.2 + 100 1.2 + 100 1.2 + 100 1.2 + 100 45-200 0.3 + 100 0.35 + 100 0.4 + 100 0.5 + 100 200-20k (200 mV range) 0.06 + 100 0.08 + 100 0.10 + 100 0.20 + 100 (2V-200V range) 0.05 + 80 0.07 + 80 0.08 + 80 0.15 + 80 (700V range) 0.06 + 100 0.08 + 100 0.10
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8842A Instruction Manual CURRENT Input Characteristics RANGE FULL SCALE 5½ RESOLUTION DIGITS 1 5½ DIGITS 4½ DIGITS 2 200 mA 199.999 mA 1 μA 10 μA 2000 mA 1999.99 mA 10 μA 100 μA 1. 4½ digits at the fastest reading rate. 2. The 200mA range is available for dc current only. DC Accuracy NORMAL (S) READING RATE ...............±(% of reading + number of counts). RANGE 90 DAYS 23±5°C 1 YEAR 23±5°C 2 YEARS 23±5°C 200 mA 0.04 + 40 0.05 + 40 0.08 + 40 2000 mA ≤1A 0.04 + 4 0.05 + 4 0.08+4 >1A 0.1 + 4 0.1
