Fluke 271 manual The Liquid Crystal Display, Controls, Function Keys

271

Getting Started Manual

The Liquid Crystal Display

The 4-line x 20-character LCD panel is used to display and edit all the parameter values. The paradigm used for selecting fields and editing values is described below.

If necessary (because of temperature variations etc.), you can adjust the display contrast using a small screwdriver or trimmer tool inserted in the hole marked LCD.

At power-up the instrument goes through a self-test cycle and the display shows the firmware revision number for a few seconds. If any tests fail, the display will show a message indicating the nature of the fault; if this happens, refer to the Users Manual.

The display shown above is called the "main menu" and shows the frequency (or period), amplitude, dc offset and symmetry of the waveform. Other menus, called "edit menus", are called when you press the EDIT key followed by a MODE key.

If the main menu display is not as shown in figure 1 above then you should reset all settings to their factory defaults. Do this by pressing RECALL, then the numeric 0 key, then ENTER.

Controls

Function Keys

These three keys are used to choose between the basic waveforms: sine, square and triangular waves, and pulses and ramps of either polarity.

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Repeated presses of a key will cycle the selection through the two or three choices offered. The associated LED will light.

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