700-SDI-RADAR-300WL-Man Rev 2 11 Apr Mar 2022
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Part# 21371
5.2.3
MEASUREMENT
Discharge unit:
the measurement unit used to report the measured discharge value.
Velocity unit:
the measurement unit used to report the measured velocity value. For
NMEA protocol which is used the RS-232 connection, the velocity is reported as an
integer value. To preserve higher precision with integer numbers, the measure
velocity will be multiplied by 10 for m/s, km/h, mph, fps and fpm when being
transferred over RS-232. When mm/s and cm/s are used, the measured values will
not be multiplied by 10. This application internally handles the multiplication factor
which is used over RS-232 protocol, and it displays the correct values to the used.
PGA Sensitivity:
This parameter limits the maximum gain (amplification level) of the
internal programmable gain amplifier. It is is strongly recommended to use the
default value 8, which allows the internal signal amplifier to use the maximum gain
when the reflected radar signal is very low. Setting this value to a lower value is used
only when the instrument is mounted very close to the water surface, typically less
than 1 meter. In that case this parameter should be set to a value of 4 or 5.
