Model 2231A-30-3 Triple-channel DC Power Supply Reference Manual Section 2:Quick reference
077100401/September 2014 2-5
The power cord supplied with the Model 2231A contains a separate protective earth
(safety ground) wire for use with grounded outlets. When proper connections are made,
the instrument chassis is connected to power-line ground through the ground wire in the
power cord. In addition, a redundant protective earth connection is provided through a
screw on the rear panel. This terminal should be connected to a known protective earth.
In the event of a failure, not using a properly grounded protective earth and grounded
outlet may result in personal injury or death due to electric shock.
Do not replace detachable mains supply cords with inadequately rated cords. Failure to
use properly rated cords may result in personal injury or death due to electric shock.
To connect the power cord:
1. Make sure that the front panel POWER switch is in the off position.
2. Properly set the 110 V/220 V selector switch located on the rear panel.
3. Connect the female end of the supplied power cord to the AC receptacle on the rear panel.
4. Connect the other end of the power cord to a grounded AC outlet.
To turn a Model 2231A-30-3 on and off:
1. Disconnect any devices under test (DUTs) from the Model 2231A-30-3 before turning the
instrument on.
2. To turn your instrument on, push the front-panel POWER switch to place it in the on position.
The screen is displayed when power up is complete.
3. To turn your instrument off, Push the front-panel POWER switch to place it in the off position.
To avoid any fire or electric shock, please ensure the AC input voltage fluctuation does
not exceed 10% of the working voltage range.
To satisfy safety requirements, always use load wires heavy enough that they will not
overheat when carrying the maximum short-circuit output current of the power supply. If
there is more than one load, then every pair of load wires must be capable of safely
carrying the full-rated current of the power supply.
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