Turner Designs C3 - Raw Fluorescence Calibration; Depth Calibration (Optional Accessory)

C3 Submersible Fluorometer
998-2300 Rev. H Page 17
3.3.3 Raw Fluorescence Calibration
In the Current Data screen select the “calibrate” button next to a specific
channel. At the bottom of the Calibration Screen select, “click to use
Uncalibrated Raw Fluorescence Mode”. Data for that channel will be
uncalibrated and reported as “Relative Fluorescence Units” (RFU).
3.3.4 Depth Calibration (Optional Accessory)
Depth is displayed in meters only. There are two calibration options for
depth:
1. The first uses only the atmospheric pressure as an offset. This is
suitable for any shallow application, including most fresh water
applications.
2. The second also compensates for gravity variations with latitude, as
designated from the UNESCO Technical Papers in Marine Science
#44. This method assumes 0 °C and 35PSU salinity.
Atmospheric Offset
Step 1 (Method 1):
♦ Select the “Calibrate” button for depth in the “Current Data” screen.
♦ Pressure in PSI will be displayed in the “Current Pressure” window.
♦ After “Current Pressure” readings are stable at desired location select
“Set Zero”.
Step 2 (Method 1):
♦ Select “Atmospheric offset only”.
Step 3 (Method 1):
♦ Select “Save Calibration” button.
♦ Depth values will now be scaled to the offset selected.