Interactive SourceMeter® Instrument Reference Manual Section 9:
Frequently asked questions (FAQs)
2461-901-01 A/November 2015 9-13
What should I do if I get an 5074 interlock error?
The instrument provides an interlock circuit on the rear panel. You must enable this circuit in order for
the instrument to set source voltages greater than ±42 V DC. If you try to assign a high-voltage output
and turn the source on when the interlock is not asserted, you see event code 5074, "Output voltage
limited by interlock."
The Model 2461 is provided with an interlock circuit that must be positively activated in
order for the high voltage output to be enabled. The interlock helps facilitate safe operation
of the equipment in a test system. Bypassing the interlock could expose the operator to
hazardous voltages that could result in personal injury or death.
If the safety interlock is not asserted and the source is turned on, the following actions occur:
• The nominal output is limited to less than ±42 V.
• The front-panel INTERLOCK indicator is not illuminated.
To recover from this error, properly engage the interlock using a safe test fixture before turning on the
Model 2461 output.
You can only use the high-voltage outputs when the interlock is asserted. If you try to assign a
high-voltage output and turn the source on when the interlock is not asserted, you see event code
5074, "Output voltage limited by interlock." Note that the SOURCE screen displays the value that was
selected for the voltage source, but the source value is limited to less than ±42 V.
See Using the interlock (on page 2-86) for more information.
How do I trigger a sweep?
Sweeps are set up as a trigger model, so to start the sweep, initiate the trigger model. You can initiate
the trigger model from the front panel by pressing the TRIGGER key.
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