ADS Environmental Services Profile Software 950015B6 - Manual (Page 141)

Profile Main Screen 2-101
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to transmit the signal. Enter a percentage between 10 and
100 (where 100 represents maximum amplification).
Peak Velocity tab  Surface Combo Device
• Enable Select this checkbox to ensure the monitor begins
taking velocity readings at the designated interval once
activated.
• Sensitivity Select the appropriate velocity sensor sensitivity
from the drop-down list. A sensitivity that is too high may
produce noise, causing interference in the signal and resulting
in spikes in the data. A sensitivity that is too low can produce
readings that are low in comparison with manual confirmation
readings. This value should only by changed on the advice of
trained ADS personnel.
• Velocity Direction Select one of the following options that
reflects the general direction of the flow at the monitoring
point and position of the velocity sensor.
 Bidirectional Choose this option for monitoring points
that may experience reverse flows. The Surface Combo
Sensor is typically positioned facing upstream into the
flow. Choosing this ensures the monitor analyzes both
positive and negative values returned from the velocity
sensor.
 Forward Choose this option for monitoring points where
reverse flows are not expected and to ensure the monitor
only analyzes positive values returned from the velocity
sensor. The Surface Combo Sensor is typically positioned
facing upstream into the flow. ADS recommends using this
setting for most applications.
 Backward Choose this option for monitoring points at
which the Surface Combo Sensor has been positioned
downstream and to ensure the monitor only analyzes flows
moving away from the face of the sensor. One application
in which this would be the preferable option would involve
measuring velocity in an outgoing line following two
incoming lines in the manhole.