Fluke 8840A - Section 2

List of lllustratilons
FIGURE TITLE PAGE
1.1 . External Dimensions ................................................................. 1-7
2.1
. Line Voltage Selection Settings ........................................................ 2-2
2.2
. Adjusting the Handle ................................................................ 2-2
2.3
. Rack-Mount Kits .................................................................... 2-3
2.4
. Installing the Single Rack Mount Kit .................................................. 2-3
2.5
. Front Panel Features ................................................................. 2-4
2.6
. Rear Panel Features ................................................................. 2-6
2.7
. Typical Error Message ............................................................... 2-7
2.8
. Overrange Indication ................................................................. 2-9
2.9
. Measuring Voltage and Resistance ..................................................... 2-11
2.10
. Measuring Current ................................................................... 2-11
3.1
. IEEE-488 Address Seiection .......................................................... 3-2
3.2
. Remote Operation Block Diagram ..................................................... 3-3
3.3
. Typical Command String ............................................................. 34
3.4
. Commands Which Correspond to the Front Panel ........................................ 3-5
3.5
. Device-Dependent Command Set ...................................................... 3-6
3.6
. Output Data Format ................................................................. 3-8
3.7
. Trigger Selection Logic Diagram ...................................................... 3-13
3.8
. Interpretation of Messages ............................................................ 3-16
3.9
. Serial Poll Register .................................................................. 3-19
3.10
. Example Program: Taking 10 Readings .................................................
3-22
3.11
. Example Program: Taking Readings with Local Control ..................................
3-23
3.12
. Example Program: Using the Serial Poll Register ........................................
3-24
3.13
. Example Program: Record Errors During Selftest ........................................ 3-25
3.14
. Example Programs: Using the IBM PC ................................................ 3-26
4.1
. Circuit Loading Error Calculation ...................................................... 4-2
4.2
. Measuring Input Bias Current Error .................................................... 4-3
4.3
. 2-Wire Ohms Measurement ........................................................... 4-4
4.4 . 4-Wire Ohms Measurement ........................................................... 4-5
4.5
. Burden Voltage Error Calculation ...................................................... 4-7
4.6
. Waveform Comparison Chart ......................................................... 4-8
4.7
. Typical Crest Factors for Various Waveforms ........................................... 4-9
4-8 . Combined AC and DC Measurement ................................................... 4-9
4.9
. Reduction of Zero-Input Error ........................................................ 4-10
5.1
. Overall Functional Block Diagram ..................................................... 5-2
5.2
. DC Scaling (VDC and rnA DC) ...................................................... 5-3
.
5.3 TracWHold Amplifier ................................................................ 5-5
5.4
. Track/J3old Circuit Configurations ..................................................... 5-6
5.5
. Timing Diagram for One AD Cycle ................................................... 5-7
5.6
. Precision Voltage Reference .......................................................... 5-8
. 5.7 Ohms Current Source ................................................................ 5-9
5.8 . Ohms Scaling ...................................................................... 5-10
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