Xylem SonTek FlowTracker2, User Manual

Page: 38 / 308

SonTek – a Xylem brand
FlowTracker2 User’s Manual (January 2019)
37
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If a GPS lock is not obtained before the station measurement is completed,
the software will not record positional information for the station. The GPS
status Icons are listed in
Table 3:4
.
•
The positional information is averaged when the “Record GPS Location”
function is selected. The period of averaging the positional information is
dependent on the user and a counter will display the number of
measurements averaged.
•
The “Record GPS location” at the bottom of the configuration screen will
state “Record GPS location” if no location is assigned yet and “Update GPS
location” if a location is already assigned.
iii). Disabled . The GPS is disabled and the operator will not be able to perform
any GPS measurements.
b) The status of GPS lock is indicated by GPS icon displayed on the left corner of
the top banner of the LCD screen. The icon’s describing the GPS status in the
handheld is defined in
Table 3:5 ,
Table 3-5 - GPS Status Icons
Icon Description Conditions
Attempting to acquire satellite
signal. GPS has not acquired any satellite
signal or GPS lock and is unable to
determine positional information
Acquiring satellite signal in
progress. GPS is acquiring additional satellite
signals, low quality positional
information available, number of
satellites < 4 and or HDOP > 2.5.
Satellite signal acquired from
available satellites. GPS lock is obtained, high quality
positional information available.
c) The averaging of positional information from the internal GPS is based on the
following criteria,
i). Averaging is limited to 1000 records. If more than 1000 records are reported –
the oldest records are dropped.
ii). Averaging is performed only when 5 or more records are recorded, otherwise
the record with the lowest HDOP/max satellites is used.
iii). If 10 or more “high quality records” are recorded – only high quality records are
used for the averaging. Otherwise both high/low quality records are used for
the averaging.
d) To change the GPS station tagging option ,
i). Use the left or right arrow key to scroll through the list of options,