Fluke 45 user manual Selecting a Measurement Range, Automatic Input Terminal Selection, WWarning

Models: 45

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Selecting a Measurement Range

Getting Started 2

Selecting a Measurement Range

EXAMPLE: Press Zto select volts ac for the primary display, then press Ito select the decibels modifier.

Press multiple buttons simultaneously.

EXAMPLE: Press Zand 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 Eto toggle in (and out) of the manual ranging mode, or press Uor T. In the manual range mode, press Uor Tto 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 Tbuttons to select the appropriate current input terminal and range.

Taking Some Basic Measurements

WWarning

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.

WWarning

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.

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Fluke 45 Selecting a Measurement Range, Automatic Input Terminal Selection, Taking Some Basic Measurements, WWarning