In its standard functioning mode, the DOP3000 computes and displays a velocity and the echo profile. This option package enables the instrument to show many more relevant measures that helps to characterize the liquid and its flow. Among them are the energy of the filtered echo, the velocity of a chosen gate as a function of time, the flow across a section of a pipe, the profile of the turbulence of the flow, and a remanence color graphic showing an history of a profile.

The curves that can be computed and displayed when this package is installed are the following:

• Velocity profile: Computes and displays a profile of the projected velocities along the ultrasonic axis. Also called V(z). Defined in mm/s.
• Echo profile: Enables to display the raw echo profile received by the transducer. Helps find disturbing stationary echoes (most of them are filtered by an IIR filter). Also called Echo(z). No unit, relative scale.
• Energy profile: Displays the energy of the echo profile, filtered by the infinite impulse response filter. Also called Energy(z). No unit, relative scale.
• V(t): Velocity as a function of time for a selected gate. Defined in mm/s.
• Flow: Computes a flow across a circular section as a function of time. Based on a weighted integrating computation on velocity profiles. Also called Flow(t). Defined in mm3/s.
• Turbulence profile: Computes a profile made of the turbulence of the velocity, gate by gate. Can either be computed using a moving average (for non-stationary flows) or a global average (for stationary flows).
• Histogram: A remanence color graphic showing an history of either a velocity, echo or energy profile can be displayed.
• Power spectrum of a single gate: This display gives a detail information on the spectral content of the echoes coming from a defined gate

Some additionnal features of this software package are:

• Selectable number of emissions per profile: this allows to precisely adapt the acquisition rate and the quality of the measured profiles in case of non assisted operating mode
• Variable origin of the velocity scale: this allows to give more space to positive or negative velocities
  
• Real time filters available: A moving average filter or a mediane filter can be applied on any displayed profile in order to reduce the variance of the measurement.
• Cursors on graphs available: which display the velocity and depth value, and their statistical values ((mean, standard deviation, minimum, maximum). The cursors always follow the curve.

Various combinations of the above curves can be displayed at the same time, either in the same graphic zone, or each one in its own graphic zone.