© National Instruments | 2-3
RMX Programmable Power Supplies User Manual
Panel Operations
Measured Value Display, Setting Display, and
Set OVP/OCP Display
Turn the VOLTAGE knob to change the voltage. Turn the CURRENT knob to change the
current.
Figure 2-6. Panel Operations
While in setting display mode (the SET key LED is illuminated), turning the VOLTAGE and
CURRENT knobs will update the output voltage and current settings.
You cannot set the output voltage to a value that is 95% of the OVP trip point or higher. You
cannot set the output current to a value that is 95% of the OCP trip point or higher.
The displayed current or voltage may not change when you turn the CURRENT or VOLTAGE
knob. This is because the values are being changed at a finer resolution than the front panel can
display. The display will update when the amount that you change the value by reaches the
smallest display digit of the set voltage or current.
Fine Adjustment
Holding down the SHIFT key while turning the VOLTAGE or CURRENT knobs allows for
finer adjustment of the programmed voltage and current values.
Note When you set a value, it is convenient to first use normal resolution to set the
value roughly and then switch to fine resolution to set it precisely.
Output Operations
The toggles each time you press OUTPUT. When output is on, the OUTPUT LED in the display
area lights. When the output is off, the OUTPUT LED in the display area turns off.
When the OUTPUT key LED is on, the power supply will drive its output terminals to a level
determined by the voltage and current settings. If you change the settings while the output is on,
the changes are applied immediately to the output. If you change the settings while the output is
off, the device will switch to setting display mode (the SET key LED will light up). Pressing
OUTPUT will apply and drive the output terminals using the new settings.
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