Configuring Frequency Measurements

Configuring Frequency Measurements

For the NI 4070/4071/4072 only, to configure a frequency measurement, complete the following steps:

Note  If you specify Auto Range (-1.0) for the frequency range, the DMM defaults to 1 Hz, which has a 2 second aperture.

• LabVIEW
  1. Use niDMM Config Measurement.
  2. Set Measurement Function to Frequency.
  3. Set Range to specify the minimum AC frequency. The DMM uses the range to calculate the aperture time.
  4. Use niDMM Configure Frequency Voltage Range.
  5. Set Frequency Voltage Range to the AC V range of your input signal.
• CVI/C++/Visual Basic
  1. Use niDMM_ConfigureMeasurementDigits.
  2. Set Measurement Function to NIDMM_VAL_FREQ.
  3. Set Range to specify the minimum AC frequency. The DMM uses the range to calculate the aperture time.
  4. Use niDMM_ConfigureFrequencyVoltageRange.
  5. Set Frequency Voltage Range to the AC V range of your input signal.