Fluke 8842a instruction manual 805-8

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 Circuit Configurations	5-9
5-5.	Timing Diagram for One A/D Cycle	5-10
5-6.	Precision Voltage Reference	5-11
5-7.	Ohms Current Source	5-12
5-8.	Ohms Scaling	5-14
5-9.	Analog-to-Digital Converter	5-16
5-10.	First Remainder-Store Period	5-17
5-11.	Autozero Period	5-18
5-12.	Vacuum Fluorescent Display	5-19
5-13.	Digital Controller Block Diagram	5-20
5-14.	Read/Write Timing Diagrams for Internal Bus	5-22
5-15.	Guard Crossing Circuit	5-24
5-16.	IEEE-488 Interface Block Diagram	5-26
5-17.	True RMS AC Option Block Diagram	5-27
5-18.	True RMS AC-to-DC Converter	5-28
6-1.	DC Calibration Connections	6-6
6-2.	First A/D Calibration Prompt	6-11
6-3.	Calibration Functions	6-12
6-4.	Optimizing Use of the 5450A	6-20
6-5.	Example A/D Calibration Program	6-25
6-6.	8842A Disassembly	6-26
6-7.	Front Panel Disassembly	6-34
6-8.	Removing the Display Window	6-35
6-9.	U202 Pin Diagram	6-46
6-10.	Waveforms for In-Guard Troubleshooting Mode	6-47
6-11.	Waveforms for Display Logic	6-49
6-12.	Typical Dynamic Control Signals	6-54
6-13.	Typical Output Waveforms for Track/Hold Circuit (TP103)	6-57
6-14.	Output of A/D Amplifier (TP101)	6-59
6-15.	Waveforms at U101-24 and U101-25	6-60
6-16.	Typical Bus Data Line Waveform	6-60
6-17.	Waveforms at TP102 for Several Inputs on 2V DV Range	6-62
6-18.	Calculating the A/D Reading From TP102 Waveform	6-63
6-19.	Option -05 Service Position	6-65
6-20.	Option -09 Service Position	6-68
6-21.	Guard Crossing Test Waveforms	6-71
7-1.	8842A Digital Multimeter	7-6
7-2.	A1 Main PCA	7-13
7-3.	A2 Display PCA	7-15
7-4.	Service Centers	7-18
7-4.	Service Centers (cont)	7-19
805-1. Installing Option -05		805-5
805-2. IEEE-488 Interface PCA		805-8
809-1. Installing Option -09		809-5
809-2. True RMS AC PCA		809-7
9-1.	Main PCA, DC Scaling and F/R Switch	9-3
9-2.	Main PCA, A/D Converter	9-5
9-3.	Main PCA, Ohms Current Source	9-7
9-4.	Main PCA, Digital	9-9
9-5.	Main PCA, Power Supply	9-11
9-6.	Display PCA	9-13

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