Making Measurements; Measuring Ac Voltage - Fluke 289 User Manual

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Users Manual

Making Measurements

The following sections describe how to take measurements with
the Meter.

Measuring AC Voltage

The Meter displays ac voltage measurements as rms (root mean
square) readings. The rms value is the equivalent dc voltage that
would produce the same amount of heat in a resistance as the
measured voltage. True-rms readings are accurate for sine
waves and other wave forms (with no dc offset) such as square
waves, triangle waves, and staircase waves. For ac with dc
offset, refer to the "Measuring AC and DC Signals" section later
in this manual.
Rotate the Meter's rotary switch to V or T and set up the Meter
to measure ac volts as shown in Figure 10.
The Meter's ac volts function offers a number of modes to
provide more details about an ac signal. Pressing the softkey
labeled Menu opens a menu of items that can be used to modify
the basic ac voltage measurement. Refer to the appropriate
section in this manual to learn more about each menu item.
To clear all modes and return to the basic volts ac measurement,
press the softkey labeled Menu. Move the menu selector to the
item labeled VAC. Press the softkey labeled VAC to clear all
functions and modes.
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123.45 VAC
Auto Range
0 100 200 300 400 500 VAC
Menu Save Setup
Figure 10. AC Voltage Measurements
Switch
Box
est07.eps