Keithley 2657A, Quick Start Manual

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5. Press the ENTER key.
6. Press the EXIT (LOCAL) key to return to the default display
screen.
How do I adapt triaxial connections to coaxial connection for
high-voltage applications?
Use the optional cable assembly (Keithley Instruments part
number SHV-CA-553) that converts a high-voltage triaxial
connector to a safe high-voltage (SHV) connector.
What should I do if I get an 802 interlock error?
You will receive error code 802, “Output blocked by interlock,” if:

You disable the interlock when the Model 2657A output is
already on

You attempt to turn on or enable the Model 2657A output
when the interlock is disabled
To recover from this error, properly enable the interlock using a
safe test fixture, and then turn on the Model 2657A output. See
“
Wiring the interlock ” for additional information on the interlock.