Range Considerations
It is not possible to change the measurement range of the NI PXI-4110 independently of the output range. The measurement range is implicitly selected based on the configured output range. The selected measurement range is large enough to measure any voltage or current possible in the configured output range.
The voltage output can be set to any value between 0% and 100% of the active range using the niDCPower Configure Voltage Level VI or the niDCPower_ConfigureVoltageLevel function, or the niDCPower Configure Voltage Limit VI or the niDCPower_ConfigureVoltageLimit function. Current output can be set to any value between 1% and 100% of the active range using the niDCPower Configure Current Level VI or the niDCPower_ConfigureCurrentLevel function, or the niDCPower Configure Current Limit VI or the niDCPower_ConfigureCurrentLimit function. Measurements for both voltage and current can be made from 0% to 105% of the active range using the niDCPower Measure Multiple VI or the niDCPower_MeasureMultiple function. Refer to Overranging for general information about enabling overranging in software.
Overranging
Enabling overranging for a particular channel of the NI PXI-4110 extends current and voltage output setpoint capabilities up to 105% of the output range. Overranging is applicable to output ranges only and does not apply to measurement ranges (the NI PXI-4110 is capable of making measurements up to 105% of the output range by default).
An auxiliary power supply providing at least 12 V at the input terminals should be used when enabling overranging for channel 1. Refer to Ranges for more information about enabling or disabling overranging for a particular channel.