JANUARY 2010 - TD 220a DEPLOYMENT GUIDE, RDCP600
Page
49
Reliable solutions
The pressure sensor measures the total pressure at a sea depth (atmospheric and hydrostatic
pressure). To estimate the hydrostatic pressure, the air pressure at the surface must be subtracted
from the total pressure, either by using a fixed air pressure or by measurements of the air
pressure.
In the
Compensation page
, check the
Use external
air pressure source
if the air pressure is measured
at the sea surface with an optional Air Pressure
sensor 2810. Check which channel the sensor is
connected to.
Alternatively, type in the correct
Fixed Air
Pressure
for your region if no external air pressure
sensor is connected.
In the
Advanced Page
, check the
Use Fixed
Pressure
if a high accuracy Quartz Pressure Sensor
is not connected to the instrument. Also, type the
fixed hydrostatic pressure value.
Next, type or select the
Pressure integration Time
and set the
Air reading offset
in Pa.
IMPORTANT! Air reading offset is only used for
calibration purposes.
Figure 1-34 Sensor Configuration, Quartz
Pressure Sensor.
Figure 1-35 Sensor Configuration, Quartz
Pressure Sensor.
