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5-1
Chapter 5
Additional Considerations
Title Page
Introduction ....................................................................................................... 5-3
Measurement Rate............................................................................................. 5-3
Advanced Trigger Mechanisms......................................................................... 5-3
Front Panel Trigger Control.......................................................................... 5-3
Computer Interface Trigger Control ............................................................. 5-3
Both External and Monitor Alarms Disabled (Type 0) ................................ 5-4
External Trigger Enabled (Type 1)............................................................... 5-4
Monitor Alarm Enabled (Type 2) ................................................................. 5-6
Thermal Voltages .............................................................................................. 5-6
When Measuring Resistance or Temperature (RTD)........................................ 5-6
True RMS Measurements.................................................................................. 5-8
Effects of Internal Noise in AC Measurements ............................................ 5-8
Waveform Comparison (True RMS vs Average Responding) ..................... 5-8
Making Mixed Measurements........................................................................... 5-9
Using Shielded Wiring...................................................................................... 5-11
General Rule ................................................................................................. 5-11
Alternate Suggestions ................................................................................... 5-11
Non-Isolated Sensor Configuration.......................................................... 5-11
Isolated and Shielded Sensor Configuration ............................................ 5-11
In More Detail............................................................................................... 5-12