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4.4.4
Tilt Raw Data
The Tilt variable displays the angle of the wading rod from the vertical based on one
second measured raw data.
a) The Tilt information is calculated from the internal pitch and roll sensor in the
FlowTracker2 probe.
b) The Pitch and Roll data is recorded once per second.
4.4.5
Battery Indicator
The Battery variable displays the real time battery voltage level of the batteries housed
in the FlowTracker2 handheld.
a) The FlowTracker2 uses eight AA batteries contained in a battery pack.
b) Cold weather can greatly affect battery voltage and capacity; always check battery
voltage after the system has acclimated to outside temperatures.
c) The Battery data are updated once per second.
d) Comparison of Battery types are listed in
General description
Nominal battery capacity (typical)
New battery voltage
Drained battery voltage
When the remaining capacity of the battery reaches 0%, the FlowTracker2 handheld
will supply the following message, "Battery level critically low – shutting down". The
user will be required to replace the batteries before continuing with operations.
4.4.6
Pressure
(Pressure Sensor)
The Pressure variable displays the pressure measurements from the one second
measured raw data.
a) Pressure data are used for calculating the total water and point measurement
depth from the water surface.
b) Atmospheric or Air pressure calibration should be performed before and during a
measurement to compensate for changes in atmospheric pressure during a
measurement.
c) Pressure data are updated once per second.
Pressure data will not be displayed if the probe is in air. The probe must be submerged
in water. Pressure sensor data displayed in this function are NOT stored and enables
the user to verify the pressure sensor operations.
FlowTracker2 User's Manual (January 2019)
Table 4-5 – Battery Specification
Category
Table 4:5
Alkaline
Single use
1500 mAh
12V
8V
63
SonTek – a Xylem brand
NiMH
Rechargeable
1900mAh
11V
9V
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