Getting Acquainted

2

Understanding the Display

dB (in ac volts functions): the dBm or dBV value.

REL: the difference between the present reading and a stored reference reading.

Setup: various messages (see Chapter 5).

Overload conditions: OL displayed.

Error conditions.

Bar Graph

The bar graph provides an analog indication of the measured input. For most measurement functions, the bar graph updates 40 times per second. Since this response 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 not available in temperature, capacitance, ac over dc, dc over ac, and ac+dc functions.

Secondary Display

The secondary display often shows the present reading when the primary display shows some other feature (MIN MAX, REL , etc.)

When multiple features are active, the secondary display shows one of the values. For example, Hz could appear in the secondary display while dB appears in the primary display.

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Fluke 189 user manual Bar Graph, Secondary Display