Enabling Logging; Auto-Ranging Sensors - RBR 1050 Series User Manual

"\dat" directory using the same name as chosen for the real-time data file but with
a ".gps" extension. See page 27 for GPS test directions.
Derived units may also be displayed. Please refer to the Derived units section
(p.30) in the Configuration menu for more details.

Enabling logging

Once the parameters have been set, the logger can be programmed by clicking
the Enable logging button. If any data are currently in the logger memory, a
dialog box will pop up providing a final chance to save before the memory is
cleared.

Auto-ranging sensors

Two auto-ranging sensors are supported by RBR, the Seapoint Fluorometer and
Seapoint Turbidity Sensor. These sensors allow the logger to change the gain
settings on the front-end amplifiers to define one of four pre-determined ranges.
For the fluorometer the ranges have full-scale values of: 5ug/l, 15ug/l, 50ug/l, and
150ug/l. For the turbidity sensor the ranges have full-scale values of: 25FTU,
125FTU, 500FTU, and 2500FTU. In full auto-ranging mode, these sensors will
be driven by the RBR Logger into the most appropriate range for the level of
property being measured. In a fixed gain mode, the user may lock the gain to
one of the ranges for the duration of the deployment.
On the Setup window, access to the auto-ranging sensors appears as a button in
the Advanced features area as shown. Pressing the button produces the
Range switching channel setup window which allows the user to select Auto-
ranging or a Fixed gain. The Setup window shows the mode in that auto-
ranging is purple and fixed gain is green.
Although readings are taken with different front-end amplifier gains, the data are
stored in the logger referenced to the maximum full-scale range. Hence all
turbidity readings are referenced to 2500FTU. This means that the calibration
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