Front Panel Operation
Setting Output Limits
4
4-55
4-49. Setting Output Limits
An output limit feature is available to help prevent accidental damage to a UUT from
overcurrent or overvoltage conditions. This feature allows you to preset the maximum
positive and negative allowable voltage or current output. Entry limits you set prevent
any output greater than the limit from being activated by entry through the front panel
keys or the output adjustment controls. Positive limits for voltage and current set the
limits for ac voltage and current. Your limit selections are saved in the nonvolatile
memory. Voltage limits are expressed as rms values, and any voltage offsets are ignored.
4-50. Setting Voltage and Current Limits
To set voltage and current entry limits, proceed as follows:
1. Press R to clear any output from the 5520A.
2. Press S. Press the softkey INSTMT SETUP to open the setup submenus.
3. Press the softkey OUTPUT SETUP to open the output setup submenus.
4. Press the softkey SET LIMITS to open the set limits menu (below).
nn117f.eps
5. To Limit Voltage (applies to both dc and ac voltages). Press a softkey under
VOLTAGE to open the voltage limits menu (below).
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a. Press the “Upper Limit” or the “Lower Limit” softkey, as desired, and enter the
new limit.
b. Press E then Pone or more times to return to a previous menu.
6. To Limit Current (applies to both dc and ac currents). Press a softkey under
CURRENT to open the current limits menu (below).
nn119f.eps
a. Press the “Upper Limit” or the “Lower Limit” softkey, as desired, and enter the
new limit.
b. Press E then Pone or more times to return to a previous menu.
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