|NI-DCPower (English | Japanese)|
The measurement range is implicitly selected based on the configured output range. Thus, you cannot change the measurement range independently of the output range. The selected measurement range is large enough to measure any voltage or current within the configured output range.
For voltage output, the NI PXIe-4142/4143 uses the ranges shown in the following tables.
|Channel||Voltage Level Range||Voltage Level|
|0-3||24 V||–24 V to +24 V|
|Channel||Current Limit Range||Current Limit|
|0-3||10 µA||+100 nA to +10 µA|
|100 µA||+1 µA to +100 µA|
|1 mA||+10 µA to +1 mA|
|10 mA||+100 µA to +10 mA|
|150 mA||+1.5 mA to +150 mA|
For current output, the NI PXIe-4142/4143 uses the ranges shown in the following tables.
|Channel||Current Level Range||Current Level|
|0-3||10 µA||–10 µA to +10 µA|
|100 µA||–100 µA to +100 µA|
|1 mA||–1 mA to +1 mA|
|10 mA||–10 mA to +10 mA|
|150 mA||–150 mA to +150 mA|
|Channel||Voltage Limit Range||Voltage Limit|
|0-3||24 V||+240 mV to +24 V|
|Note If a range that is not listed in the previous tables is selected, NI-DCPower coerces the range to the next highest range. For example, requesting a 2 mA current limit range on Channel 0 on the NI PXIe-4142/4143 coerces the current limit range to 10 mA.|
Enabling overranging for a particular channel extends voltage and current output capabilities from 100% to 105% for the output range. Overranging is applicable to output ranges only and does not apply to measurement ranges. Measurements in any given range may be made up to 105% of the range by default without enabling overranging.
Changing current ranges implies a change in the shunts used to measure current. Under loaded conditions, particularly in constant current mode, this will result in glitches at the output. In order to reduce the risk of damage to the DUT, the range change is designed so that the current may be less than programmed but not more. The advanced switching algorithm of the NI PXIe-4142/4143 will typically keep the glitch amplitude less than one volt and maintain a typical duration of less than 2 µs.