Fluke 189 - Manual (Page 37)

3-1
Chapter 3
Making Measurements
Introduction
Chapter 3 explains how to make measurements. Most
measurement functions can be selected by using the
rotary switch.
White letters or symbols identify primary functions; blue
letters or symbols identify alternative functions. Press the
blue button to access these alternate functions.
Frequency-related functions can be selected (Hz, duty
cycle, and pulse width) when the rotary switch is in any
volts or amps position
.
Measuring Voltage
Voltage is the difference in electrical potential between
two points. The polarity of ac (alternating current) voltage
varies over time, while the polarity of dc (direct current)
voltage is constant over time.
Ranges available in volts functions are:
•
\ $
5.0000 V, 50.000 V, 500.00 V, 1000.0 V
•
,m
50.000 mV, 500.00 mV, and 5000.0 mV
Readings in the 5000.0 mV range overload ( 0L ) near
3000 mV ac or dc. The 5000.0 mV range overlaps the
5.0000 V range to provide direct reading display for
Fluke accessories that have a millivolt output with limits
scaled by 1000. For example, the Fluke 80i-1000
Current Clamp provides 1 mV ac per amp measured up
to 1000 amps.