The measurement range is implicitly selected based on the configured output range. 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 PXIe-4147 uses the ranges shown in the following tables.
|Channels||Voltage Level Range||Voltage Level|
|0 to 3||1 V||-1 V to +1 V|
|8 V||-8 V to +8 V|
|Channels||Current Limit Range||Current Limit|
|0 to 3||1 µA||+10 nA to +1 µA|
|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|
|100 mA||+1 mA to +100 mA|
|3 A||+30 mA to +3 A|
For current output, the PXIe-4147 uses the ranges shown in the following table.
|Channels||Current Level Range||Current Level|
|0 to 3||1 µA||-1 µA to +1 µA|
|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|
|100 mA||-100 mA to +100 mA|
|3 A||-3 A to +3 A|
|Channels||Voltage Limit Range||Voltage Limit|
|0 to 3||1 V||+10 mV to +1 V|
|8 V||+80 mV to +8 V|
Enabling overranging extends voltage and current output capabilities from 100% to 105% for all voltage and current ranges except the 8 V range. Overranging is applicable to outputs ranges only and does not apply to measurement ranges. Measurements in any given range may be made up to at least 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.