YSI ProDSS - Manual (Page 27)

25
Operation
Figure 29 Setup Depth
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 (
Figure 6 on page 11 ). 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 29 ).
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.
Figure 30 Sensor Display
Sensor Display
→ Display ( Figure 30 )
The Sensor display menu determines the measurements that are shown
on the Run screen (
Figure 3 Main display example on page 28 ). 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.