Fluke 8840A User Manual

List of Illustrations
FIGURE
TITLE
I
. 5.9 Analog-to-Digital Converter ........................................................... 5-11
.
5.10 First Remainder-Store Period .......................................................... 5-12
.
5.11 Autozero Period 5-13
.....................................................................
.
5.12 Vacuum Fluorescent Display .......................................................... 5-13
.
5.13 Digital Controller Block Diagram ...................................................... 5-14
.
5.14 Read/Write Timing Diagrams for Internal Bus ........................................... 5-16
.
5.15 Guard Crossing Circuit 5-17
...............................................................
.
5.16 IEEE-488 Interface Block Diagram ..................................................... 5-18
.
5.17 True RMS AC Option Block Diagram ................................................. 5-19
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5.18 True RMS AC-to-DC Converter ....................................................... 5-20
. 6.1 Connections for Kelvin-Varley Voltage Divider .......................................... 6-3
. 6.2 First A/D Calibration Prompt 6-7
.........................................................
. 6.3 Calibration Functions 6-8
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. 6.4 Optimizing Use of the 5450A ......................................................... 6-13
. 6.5 Example A/D Calibration Program ..................................................... 6-16
. 6.6 8840A Disassembly .................................................................. 6-18 1
. 6.7 Front Panel Disassembly ............................................................. 6-23
6.8
. Removing the Display Window ....................................................... 6-24 I
.
6.9 U202 Pin Diagram 6-32 ~
..................................................................
.
6.10 Waveforms for In-Guard Troubleshooting Mode .......................................... 6-33
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6.11 Waveforms for Display Logic ......................................................... 6-35
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6.12 Typical Dynamic Control Signals ...................................................... 6-38
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6.13 Typical Output Waveforms for TracWHold Circuit (TP103) ................................ 6-40
. 6.14 Output of A/D Amplifier (TP101) ..................................................... 6-41
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6.15 Waveforms at U101-24 and U101-25 .................................................. 6-42
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6.16 Typical Bus Data Line Waveform ..................................................... 6-43
.
6.17 Waveforms at TP102 for Several Inputs on 2V DV Range ................................ 6-43
.
6.18 Calculating the A/D Reading From 'IF102 Waveform .................................... 6-44
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6.19 Option -05 Service Position ........................................................... 6-45
. 6.20 Option -09 Service Position 6-47
...........................................................
.
6.21 Guard Crossing Test Waveforms ...................................................... 6-49
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805.1 Installing Option .05 ................................................................. 805-31
.
809.1 Installing Option .09 .................................................................
809-1
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Fluke 8840A Specifications

General

Frequency Range	20 Hz to 100 kHz
Operating Temperature	0°C to 50°C
Display	Vacuum Fluorescent
DC Current Range	0 to 2 A
AC Current Range	0 to 2 A