ADS Environmental Services FlowShark Pulse QR 775004 A1 - Manual (Page 62)

Installation 6-17
10.22 in (354.5 mm)
12.60 in (320 mm)
1.22 in (31 mm)
.94 in (24 mm) 1.57 in (40 mm)
.12 in (3 mm)
.29 in (7.5 mm)
M16
X
Y
.69 in (17.5 mm)
Figure 6-22 Air-ultrasonic sensor dimensions (X represents countersunk holes DIN 74 - A M5 for direct fastening; Y
represents the three adapter plates required for fastening to the pipe mounting system.)
The air-ultrasonic sensor has a 4-inch (10 cm) deadband and,
therefore, cannot measure depths within this range.
If depths occur within this deadband, the FlowShark Pulse will
indicate a fixed distance of 4 inches (10 cm) below the air-
ultrasonic sensor, producing erroneous flow quantity
measurements.
If the air-ultrasonic sensor becomes submerged, the sensor will
send the signal directly into the flow. Since sounds travels faster in
flow than in air, erroneous depth measurements are likely to occur.
Therefore, do not include the deadband in the maximum depth
parameter for the air-ultrasonic sensor. Instead, configure the
equipment to obtain depth readings within this range from the
pressure sensor.
Sensor Connection
A sensor with an integrated pressure cell has a Type LIY11Y 2x1.5 mm² + 1x2x0.34
mm² + PA 1.5/2.5 custom cable.
Sensors without a pressure measurement cell have Type LIY11Y 2x1.5 mm² +
1x2x0.34 mm² cables. These sensors can be extended with single-shielded signal
extension cables without modification.
ADS recommends Type A2Y(L)Y 6x2x0.8 cables (or equivalent cable types) or a
higher number of wires using 2 wires for bus communication. The remaining wires
must be connected in parallel as 2 complete wires for the power supply.
The maximum fixed cable length permitted between the flow velocity sensor and the
transmitter is 450 feet (150 m). A cable length of up to 750 feet (250 m) may be used
if a flow velocity sensor with a 90-foot (30-m) fixed cable is used in conjunction with
a connection box and a signal extension cable with a larger cross-sectional area.