Features
Softkey Menu Trees 3
3-5
The STBY (Standby) key puts the Calibrator in standby mode. Standby mode is shown by “STBY”
in the lower left corner of the Output Display. In standby mode, the NORMAL, AUX and 20A
output terminals are internally disconnected from the Calibrator. The Calibrator starts in standby
mode. The Calibrator automatically changes to standby if:
• is pushed.
• A voltage ≥33 V is selected when the previous output voltage was <33 V.
• The output function changes. When you change from ac or dc voltage <33 V, the Calibrator
does not change to STBY.
• A current output more than 3 A is selected. This is when the output location changes to the
20A terminal.
• An overload condition is sensed.
The OPR (Operate) key puts the Calibrator in operate mode. Operate mode is shown by “OPR” in
the lower left corner of the Output Display and the illuminated indicator on .
The EARTH (Earth Ground) key opens and closes an internal connection from the NORMAL
LO terminal to earth ground. An indicator on the key shows when this connection is made. The
power-up default condition is earth disabled (indicator off).
The SCOPE (Oscilloscope) key starts or stops an oscilloscope calibration option (if it is installed).
An indicator on the key shows when the option is active. If an oscilloscope calibration option is not
installed in the Calibrator and the SCOPE key is pushed, the calibrator shows an error message.
The TRIG OUT (Trigger Out) key sets the external trigger when in the scope mode. An indicator
on the key shows when external trigger output is active. If the Calibrator is not in scope mode
when is pushed, the beeper will sound.
The PREV MENU (Previous Menu) key recalls the previous set of menu selections. Each push of
this key retreats up one level of the menu tree until the display shows the top-level menu selection
of the function selected.
Softkeys
The functions of the five unlabeled blue softkeys are shown by names on the Control Display
above each key. The functions change when in operation so that many different functions can be
accessed with these keys. A group of softkey names is a menu. A group of connected menus is
called a menu tree.
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