nidcpower module¶
Installation¶
As a prerequisite to using the nidcpower module, you must install the NI-DCPower runtime on your system. Visit ni.com/downloads to download the driver runtime for your devices.
The nimi-python modules (i.e. for NI-DCPower) can be installed with pip:
$ python -m pip install nidcpower~=0.8.0
Or easy_install from setuptools:
$ python -m easy_install nidcpower
Usage¶
The following is a basic example of using the nidcpower module to open a session to a Source Meter Unit and measure voltage and current.
import nidcpower
# Configure the session.
with nidcpower.Session('dev1') as session:
session.measure_record_length = 20
session.measure_record_length_is_finite = True
session.measure_when = nidcpower.MeasureWhen.AUTOMATICALLY_AFTER_SOURCE_COMPLETE
session.voltage_level = 5.0
session.commit()
print('Effective measurement rate: {0} S/s'.format(session.measure_record_delta_time / 1))
samples_acquired = 0
print(' # Voltage Current In Compliance')
row_format = '{0:3d}: {1:8.6f} {2:8.6f} {3}'
with session.initiate():
while samples_acquired < 20:
measurements = session.fetch_multiple(count=session.fetch_backlog)
samples_acquired += len(measurements)
for i in range(len(measurements)):
print(row_format.format(i, measurements[i].voltage, measurements[i].current, measurements[i].in_compliance))
Additional examples for NI-DCPower are located in src/nidcpower/examples/ directory.