Soft dB I-Track User guide - Manual (Page 18)

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2) Insert both microphones in the calibration chamber;
3) Enter the calibrator info (optional);
4) Click the “Start Calibration” button to launch the calibration process.
It is recommended to perform a phase mismatch compensation calibration before each
measurement campaign.
Some PI Residual calibrators require a certain time to equilibrate the pressure in the calibration
chamber after the insertion of the microphones.
PI Residual and Dynamic Capability
The Pressure-Residual Intensity (PI Residual) of the instrument (IEC 1043:1993) is used to define the
dynamic capability of the instrument (ISO 9614-1, 2 and 3). This PI Residual measurement tool is
intended to work with the GRAS 51AB Residual PI Calibrator connected to the Alto or Conductor
output, but could also be used with another residual PI calibration device.
To perform a PI Residual measurement:
1) Connect the PI residual calibrator to output 1 of the Conductor or Alto;
2) Insert both microphones in the calibration chamber;
3) Enter the calibrator info (optional);
4) Click the “Start Measure” button to launch the measure process.