Transducer Face page
The sound speed close to the transducer face is an important parameter for maximum accuracy. You can define the sound speed at the transducer manually, or retrieve the information from a dedicated sensor. The information is currently not used by the ME70. It is saved with the raw data for use in future analysis.
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How to open
This page is opened from the Environment dialog box. The Environment dialog box is opened from the Setup menu.
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Description
Many users mount a sensor close to the transducer face in order to measure the sound speed. The sensor is often referred to as a sound velocity probe.
Note
The sensor is not a part of the ME70 system. This is a commercial item that can be purchased locally.
If the sensor is not mounted, the sound speed information must be provided manually.
Details
Select transducer sound speed source
•  Probe
By selecting Probe, the sound speed values from the sensor are received. The information is included in the raw data files.
The sensor is not a part of the ME70 system. This is a commercial item that can be purchased locally.
•  Manual
This option allows you to input the sound speed manually. This can be relevant if neither a sound speed sensor nor a CTD (Conductivity Temperature Depth) sensor is available.
•  Profile
Select Profile to use a sound velocity profile provided by a CTD (Conductivity Temperature Depth) sensor.
Sound speed at transducer
•  Sound Speed
If Profile or Probe is chosen as source, this box shows the value in current use.
•  Warning limit for difference in sound speed
This function compares the sound velocity reading from the probe with the current setting in the active profile. If the difference exceeds the value you have defined in the spin box, an alarm is generated. The purpose of this alarm is to notify you that you should load a new profile.