5500A
Operator Manual
4-4
4-3. Warming up the Calibrator
When you turn on the 5500A, 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 5500A 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
5500A Calibrator to 0V dc in the standby mode. Use the P key 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. Some parameters are volatile, meaning they will be lost during reset or when
power is turned off. The following descriptions will indicate which parameters are
“nonvolatile.”
When you press S from the power-up state, the display changes as follows:
CAL INSTMT
SETUP
UTILITY
FUNCTNSSPECS
SHOW
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.
• CAL (Calibration) Opens the calibration menu. Softkeys in this menu activate
calibration to external standards, calibration check, and dc zeros calibration. Another
softkey displays calibration date information and another opens a calibration report
menu. Zero calibration is described later in this chapter.
• SHOW SPECS (Show Specifications) [Future] Displays published 5500A
Calibrator specifications, duplicating the information provided in Chapter 1 of this
manual.
• INSTMT SETUP (Instrument Setup) Selects the desired temperature standard and
opens submenus to access Output, Display, and Remote Setups.
• UTILITY FUNCTNS (Utility Functions) Allows you to initiate a self-test, format
the nonvolatile memory, and review the instrument configuration software versions
and user report string. These features are explained under “Utilities Function Menu”
later in this chapter.
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