Bedienungsanleitung Fluke 289 (Seite 25 von 88) (Englisch)

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True-rms Digital Multimeters

Input Alert™ Feature

press 5 to scroll the screen horizontally and reveal the off-screen

menu items. Conversely, with the menu selector on an item in

the right-hand column, press 6 to reveal the off-screen menu

items.

Input Alert™ Feature

XW Warning

To avoid circuit damage and possibly blowing the

Meter’s current fuse, do not place the probes

across (in parallel with) a powered circuit when a

lead is plugged into a current terminal. This

causes a short circuit because the resistance

through the Meter's current terminals is very low.

If a test lead is plugged into the mA/μA or A terminal, but the

rotary switch is not set to the correct current position, the beeper

warns you by making a chirping sound and displays “Leads

connected incorrectly”. This warning is intended to stop you from

attempting to measure voltage, continuity, resistance,

capacitance, or diode values when the leads are plugged into a

current terminal.

Using the Info Button

While operating the Meter, more information about a selected

function, a front-panel button, or a menu item may be necessary.

Press I to open an information window that lists topics

covering the functions and modifiers that are available at the time

the button is pressed. Each topic provides a brief explanation on

a Meter function or feature.

The information revealed through I is not meant to replace

the more detailed information found in this manual. Function and

feature explanations are brief and only meant to refresh a

person’s memory.

The number of information topics displayed at any one time may

exceed the display area. Use the softkeys labeled Next and Prev

to move from topic to topic. Use the softkey labeled More or 7

and 8 to scroll through the information a full screen at a time.

Pressing the softkey labeled Close, or I will close the

information window.

Hold and AutoHold Mode

To freeze the display for any function, press H. Only the mini-

measurement display and hazardous voltage icon (z) continue to

indicate the actual input. The battery level indicator is also active.

The Meter’s softkeys are relabeled for saving the frozen reading

or activating the AutoHold mode.

If H is pressed while MIN MAX record, peak record, or a

recording session is in progress, the display freezes but the data

acquisition continues in the background. Pressing H again

updates the display to reflect data that was acquired during the

hold.

Pressing the softkey labeled AutoHOLD activates AutoHold if

the Meter is not in the Peak, MIN MAX, or Record modes.

AutoHold operation monitors the input signal and updates the

display and, if enabled, sounds the beeper, whenever a new

stable measurement is detected. A stable measurement is one

that does not vary more than a selected adjustable percentage

(AutoHold threshold) for at least one second. The Meter filters

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Libble nimmt den Missbrauch seiner Dienste sehr ernst. Wir setzen uns dafür ein, derartige Missbrauchsfälle gemäß den Gesetzen Ihres Heimatlandes zu behandeln. Wenn Sie eine Meldung übermitteln, überprüfen wir Ihre Informationen und ergreifen entsprechende Maßnahmen. Wir melden uns nur dann wieder bei Ihnen, wenn wir weitere Einzelheiten wissen müssen oder weitere Informationen für Sie haben.

Fluke 289 Seite 25

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