Warming Up The Calibrator; Using The Softkeys - Fluke 5520A Operator's Manual

5520A
Operators Manual

4-3. Warming up the Calibrator

When you turn on the 5520A, allow a warm-up period of at least 30 minutes for the
internal components to stabilize. This ensures that the calibrator meets or exceeds the
specifications listed in Chapter 1.
If you turn the 5520A Calibrator off after warm-up and then on again, allow a warm-up
period of at least twice the length of time it was turned off (maximum of 30 minutes).
For example, if the calibrator is turned off for 10 minutes and then on again, allow a
warm-up period of at least 20 minutes.

4-4. Using the Softkeys

The five keys just to the right of the P(Previous Menu) key are called softkeys.
Softkey key functions are based on the label that appears directly above the key in the
Control Display. Pressing a softkey either changes a value or causes a submenu with new
selections to appear on the Control Display. Softkey menus are arranged in varying
levels, as described in "Softkey Menu Tree" in Chapter 3. You can move backwards to
previous menu selections by repeatedly pressing P. Although pressing R will also
return you to the top level menu, it will also reset all volatile settings and return the
5520A Calibrator to 0 V dc in the standby mode. Use the Pkey as your main
navigating tool for moving around the menu levels.
4-5. Using the Setup Menu
Press the front panel S key for access to various operations and changeable
parameters. Most parameters are nonvolatile, meaning they will be saved during reset or
when power is turned off. Chapter 3 shows a map of the menu tree, lists the parameters,
and has a table of factory default settings.
When you press S from the power-up state, the display changes as follows:
This is the primary instrument setup menu. The list below describes submenus available
through each softkey and tells you where you can find further information in the
manuals.
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4-4
CAL (Calibration) Opens the calibration menu. You use softkeys in this menu to
view the calibration dates, print a calibration report, and perform 5520A calibration,
and to run the Zero calibration routine. Zero calibration is described later in this
chapter.
SHOW SPECS (Show Specifications) Displays published 5520A Calibrator
specifications for the output value that is currently selected.
INSTMT SETUP (Instrument Setup) Lets you change the power-up or reset default
setting for various instrument parameters. Many of the same parameters in this menu
can be changed during operation, but the changes you make during operation are
volatile. Changing them here makes them nonvolatile. To restore factory defaults,
use the Format NV Memory menu under the UTILITY FUNCTNS menu.
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