Keithley 6485/E Digital-Multimeter, DMM, 6485/E Datenbogen

If the interlock is asserted (opened) while the unit is on the 50V or 500V range, the voltage 
source will also technically be in compliance. However, there will be no indication of that 
status over the front panel or in the status registers. The open interlock takes precedence.

The following command sequence will output 5V on the 10V range with a 2.5mA limit:

*RST

' Return 6487 to GPIB defaults.

SOUR:VOLT:RANG 10

' Select 10V source range.

SOUR:VOLT 5

' Set voltage source output to 5.

SOUR:VOLT:ILIM 2.5e-3

' Set current limit to 2.5mA.

SOUR:VOLT:STAT ON

' Put voltage source in operate.

SOUR:VOLT <Voltage>
SOUR:VOLT:RANG <Range> 
SOUR:VOLT:ILIM <Limit>
SOUR:VOLT:STAT <b>
SOUR:VOLT:INT <b>
SOUR:VOLT:INT:FAIL?

Set the source output level (-500 to +500V).
Set source range to one of three ranges: 10, 50, and 500V.
Set the source current limit: 2.5e-5, 2.5e-4, 2.5e-3, or 2.5e-2.

1

Enable (ON) or disable (OFF) source output.
Enable (ON) or disable (OFF) interlock for 10V range.

2

Query interlock state (1 = asserted); source output cannot be turned on.

1

 2.5e-2 not available for 50V and 500V ranges.

2

 See 

 for interlock operation.