Fluke 189 — обзор функции быстрого измерения сигналов в мультиметрах [35/96]

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Getting Acquainted

Using FAST MN MX

2-21

Using FAST MN MX

FAST MN MX can capture transient signal events as short

as 250 µs, but with decreased accuracy; only 3-1/2 display

digits are allowed.

Activate FAST MN MX by pressing O M. As with

regular MIN MAX, you can then press M to cycle

through maximum, minimum, and average primary

displays. The meter beeps for any new minimum or

maximum value. Exit FAST MN MX by pressing

ON (CANCEL) or by turning the rotary switch.

A low battery condition (flashing B) disables FAST MN

MX.

In ac measurement functions, MAX and MIN values are

peak values, AVG is the rms value. This provides the

necessary information in one display for calculation of

Crest Factor (peak/rms).

Due to longer required response times, you cannot use

FAST MN MX in the following functions: ohms, diode test,

conductance, continuity, capacitance, temperature, ac

over dc, ac+dc, Hz, duty cycle, and pulse width.

tc033f.eps

Figure 2-7. Min Max Avg