ADS Environmental Services FlowShark Pulse QR 775004 A1 - Manual (Page 152)

8-62 ADS FlowShark Pulse O&M Manual
the FlowShark Pulse automatically reduces the number of measurement windows
available. The unit does not require as many measurement windows when low flow
depths exist.
The failure of one or more windows does not determine measurement success.
However, ADS recommends investigating the location if more than 50 percent of the
measurement windows fail (except under low flow conditions). When necessary,
please contact ADS for diagnostic support.
H-Sensor
When level measurement from bottom up has been selected, the depth level and
signal quality for the returned echo will display. When external depth measurement
devices are in use, only the input signal (mA) for a sensor is available.
The signal quality level should be around 90 to 100 percent. Therefore, a depth
measurement with a signal quality falling below 50 percent will be rejected,
producing a 0 reading.
H-Echo profile
(enabled only when measuring depth using an air- or water-ultrasonic sensor)
Figure 8-102 Echo profile for depth measurement
The previous graphic enables the service personnel to assess the echo signal within
the acoustic range measured. Ideally, the initial peak would be very narrow, steep,
and high, representing reflections from the interface between water and air. The
remaining peaks would be lower and wider, representing double and multiple
reflections caused by the signal echoing back and forth between the water/air and
water/ground interfaces.
T-Sensor
This screen allows the user to view water and air temperature readings. Air
temperature is available only when using an external LUS air-ultrasonic sensor
supporting the FlowShark Pulse. Invalid measurements may indicate cable breaks,
short circuits, or improperly terminated connections.