Front Panel Operation
Introduction
4
4-3
4-1. Introduction
XWarning
The 5520A Calibrator is capable of supplying lethal voltages. To
avoid shock hazard, do not make connections to the output
terminals when any voltage is present. Placing the instrument
in standby may not be enough to avoid shock hazard, since the
O key could be pressed accidentally. Press the R key and
verify that the 5520A Calibrator is in standby before making
connections to the output terminals.
This chapter presents instructions for operating the 5520A Calibrator from the front
panel. For a description of front panel controls, displays, and terminals, see Chapter 3,
“Features.”
4-2. Turning on the Calibrator
WWarning
To avoid electric shock, make sure the 5520A Calibrator is
safely grounded as described in Chapter 2.
Caution
Before turning the 5520A Calibrator on, make sure that the line
voltage selection is set properly. Refer to “Selecting Line
Voltage” in Chapter 2 to check the line voltage setting.
When the 5520A Calibrator is powered, the initial display is “Starting Up...” (see below)
and it completes a self-test routine. If a self-test fails, the Control Display identifies an
error code. For a description of error codes, see Chapter 7, “Maintenance.”
NN062F.EPS
After self-test, the control display shows the reset condition (below).
nn063f.eps
For a discussion of the softkey selection shown above (auto/locked), see “Auto Range
Versus Locked Range” later in this chapter.
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