Fluke 45 - Manual (Page 22)

Getting Started
Selecting a Measurement Range
2
2-5
EXAMPLE: Press
Z to select volts ac for the primary display, then press I to
select the decibels modifier.
•
Press multiple buttons simultaneously.
EXAMPLE: Press
Z and Ysimultaneously to select true rms volts ac + volts dc
(calculated) in the primary display.
For more details on the uses of each button, refer to Chapter 3, "OPERATING THE
METER FROM THE FRONT PANEL."
Selecting a Measurement Range
Measurement ranges can be selected automatically by the meter in "autorange" or
manually by the user. In the autorange mode, the meter selects the appropriate range for
the measurement reading.
To manually select a range, press
E to toggle in (and out) of the manual ranging mode,
or press
U or T . In the manual range mode, press U or T to up range or down
range to the desired range. For more details on ranging, refer to "Ranging’’ in Chapter 3.
Automatic Input Terminal Selection
If current (ac or dc) is being measured in the autorange mode and there is no input on the
100 mA terminal, the meter switches automatically between the 100 mA and 10 A input
terminals looking for a signal. A front panel annunciator indicates that the meter is in the
mA range while the meter attempts to select the correct input terminal.
When a signal is detected at either input terminal, the display updates with the
measurement results. If an input signal is not found on either input terminal, a
measurement is taken on the mA terminal.
Automatic input terminal selection is disabled when the meter is in the manual ranging
mode. Use the
Uand T buttons to select the appropriate current input terminal and
range.
Taking Some Basic Measurements
W
Warning
Read “Multimeter Safety” before operating this meter.
The following procedures describe the basics of taking common measurements from the
front panel. These procedures are provided for the user who needs to get started quickly,
but does not want to read the rest of the manual at this time. However, in order to take
full advantage of your meter, you should read the remainder of this manual carefully and
completely.
W
Warning
To avoid electrical shock or damage to the meter, do not apply
more than the rated voltage between any terminal and earth
ground. The meter is protected against overloads up to the
limits shown in Table 3-1. Exceeding these limits poses a
hazard to the meter and operator.