Fluke 77 IV [13/18] Using the bar graph

Using the Bar Graph

The bar graph is like the needle on an analog Meter. There is an

overload indicator (►) to the right, and a polarity indicator (±) to the

left.

Because the bar graph is much faster than the digital display, the

bar graph is useful for making peak and null adjustments, and for

observing rapidly changing inputs.

The bar graph is disabled when measuring capacitance. In

frequency, the bar graph accurately indicates the voltage or

current up to 1 kHz.

The number of lit segments indicates the measured value and is

relative to the full-scale value of the selected range.

For example, in the 60 V range (see below), the major divisions on

the scale represent 0, 15, 30, 45, and 60 V. An input of −30 V

lights the negative sign and the segments up to the middle of the

scale.

AIK11F.EPS

Cleaning

Wipe the case with a damp cloth and mild detergent. Do not use

abrasives or solvents. Dirt or moisture in the terminals can affect

readings.

Testing the Fuses

XWWarning

To avoid electrical shock or injury, remove the test

leads and any input signals before replacing the fuse.

Test fuses as shown below.

11 A 440 mA

<0.5

<12

OKOK

RANGEHOLD

MIN MAX

AIK12F.EPS