ADS Intrinsically-Safe TRITON+, Инструкция по установке, эксплуатации и обслуживанию, Страница: 221 / 424

6-34 ADS Manual

Backward Bidirectional
Choose this option when the
Surface Combo Sensor is installed facing downstream and
to ensure the monitor analyzes flows moving both away
from and toward the face of the sensor. This option would
be beneficial, for example, when using a weir to measure
overflows with the potential of river intrusion.

Maximum Velocity
Select the maximum expected velocity
that will occur at the site for the monitor to use in fine-tuning
the velocity data. The
Auto option serves to optimize the range
and resolution of the velocity data samples to match the
characteristics of the flow.
The default setting is 10 fps.

Duration Select the amount of time for the sensor to transmit
and receive the velocity signal based on the noise present at the
monitoring point. Most sites require only a one (1) second
(
default ) interval. However, sites that experience elevated
noise levels or velocity dropouts to zero require a longer
interval (
2 ).

Coefficient A Enter the factor (offset) by which to calibrate
surface velocity to ensure accurate surface velocity readings
across all velocity ranges. ADS strongly recommends using the
default setting (
0 fps ) for this offset; therefore, please contact
ADS before modifying this setting.

Coefficient B
Enter the factor (gain) by which to calculate
surface velocity to ensure accurate surface velocity readings
across all velocity ranges. ADS strongly recommends using the
default setting (
1.00 ); therefore, please contact ADS before
modifying this setting.

Gain
This value represents the factor applied to raw velocity
(RAWVEL entity in Qstart ) to determine average velocity and
to calculate quantity for the Flow 1(2) device. Qstart does not
apply the Gain to the velocity readings reported in Diagnostics ,
where the raw velocity readings are used for comparison
against the manual measurements.

Cross Check Gain Enter the value by which to multiply raw
velocity readings in the monitor to determine average velocity
for comparison purposes in the monitor.
The default is 0.90.