Xylem YSI ProDSS, Руководство пользователя

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25
Operation
Setup Depth
→
Setup
→
Depth
For ProDSS bulkheads with the depth sensor:
The ProDSS cable assemblies with a depth sensor in the bulkhead can
measure virtual vented depth. The virtual vented depth measurement
allows for real time compensation for atmospheric pressure using the
instrument’s barometer.
Depth offset : Depth offset can be used if referencing water elevation
against a known datum. If a depth offset is entered (in meters), the output
value will shift by the value of the offset (
Figure 28 ).
Altitude/Latitude : To compensate for atmospheric pressure based on
elevation and gravitational pull, enter the local altitude in meters relative
to sea level and latitude in degrees where the ProDSS is sampling.
Latitude effect: Varying latitudes cause a 200 mm change in depth from
equator to pole.
Altitude effect: Varying altitudes cause approximately 90 mm change
from sea level to 8000 m. A 100 m change causes 1.08 mm of change to
the readings.
Sensor Display
→
Display
( Figure 29 )
The Sensor display menu determines the measurements that are
shown on the Run screen (
Figure 9 ). The Run screen will only show
measurements for sensors that are attached to the cable bulkhead.
If more measurements are selected than can be displayed on one screen,
a scroll bar will be shown. Use the and keys to scroll through the
measurements.
NOTE: For depth profiling, enable Vertical Position under Depth
Display to view the real-time position of the depth sensor
in the water column. This is helpful in profiling applications
to ensure the depth sensor is lowered to the desired depth
without waiting for the depth data to stabilize.
Figure 28 Setup Depth
Figure 29
Sensor Display