User Manual for
AML Oceanographic’s
Plus
X
10
Once the atmospheric pressure compensation is applied, it will be applied to all pressure sensor data
until it is turned off or recalculated. The setting is written to memory, so it remains set when the
instrument is powered down.
Using SeaCast
Refer to the SeaCast User Manual for instructions on enabling "Zero Depth."
Using a Terminal Emulator
•
Establish serial communications with the instrument on your computer. Refer to the
Communications section of this manual for more information.
•
Once a connection is established, ensure the instrument is stationary, and is not submerged
in water.
•
To turn ON Atmospheric pressure compensation, issue the
ZERO ON
command. This will
calculate and apply the offset required to compensate for current atmospheric pressure
conditions.
•
To turn OFF Atmospheric pressure compensation, issue the
ZERO OFF
command. This will
disable the offset.
•
Issuing the
ZERO
command again will calculate a new offset based on current conditions.
Logging a Profile
•
Ensure the pre-deployment procedures have been completed (see page 6).
•
Plug the data/power cable into the instrument.
•
Ensure that the desired sampling settings have been selected and applied.
•
With the instrument in air (NOT submerged), use the
ZERO
command to zero the barometric
pressure offset (P
•Xchange™ only).
•
Insert the red shorting plug to power the instrument. Insertion of the shorting plug tells the
instrument to begin logging data once it is submerged. The instrument determines whether
or not it is submerged by looking for valid conductivity or sound speed readings.
o
The green LED light should illuminate on the top of the instrument indicating the
battery has more than 20% capacity remaining with alkaline batteries, 5% remaining
with Ni-Cad batteries, and the instrument is ready to start logging.
o
If the LED light is red, the battery charge is less than 20% with alkaline batteries,
5% with Ni-Cad batteries, but the instrument is still ready to log.
o
If the LED light fails to illuminate, the instrument will not log. Refer to the
Troubleshooting section of this manual if this occurs.
•
Securely attach the lowering cable to the instrument shackle bar.
•
Lower the instrument until it is just submerged. Keep the instrument at this depth for 2
minutes prior to beginning the cast. This allows the sensors time to wet and the pressure
case to shed heat.
•
Send the instrument down to the desired depth and return it to the surface.
•
Note that with Plus
•X
in the typical, vertical orientation, the downcast data is usually more
accurate than the upcast data since the downcast measurements are not contaminated by
the thermal shedding from the pressure case.
