Manual

June 2004 Isis® Sonar User's Manual, Volume 2 117
Table G-4. SeaBird’s CTD values resulting when the Sensors display is active
Raw Temperature Frequency from serial port template character 'b'
Raw Pressure Frequency from serial port template character '{pf}'
Raw Pressure Temperature from serial port template character ';'
Raw Conductivity Frequency from serial port template character 'Q'
Raw Turbidity from serial port template character '|'; use “pipe” symbol
7. The values computed in step 2 are displayed in the CTD Computed Data area of
the Sensor Display window.
• Temperature (degrees C)
• Depth (meters) This will be the same depth as in the Parameter display
window unless the depth value in the Parameter display has been
overridden with a manual depth setting.
• Sound Velocity (meters per second) computed using Chen-Millero formula
• Conductivity (Siemens per meter)
• Turbidity (percent of daylight)
• In playback mode, all of the values are displayed with the following
exception: If the data are saved in Q-MIPS format, only the computed
values are saved. The raw frequency data are not available.
G.3 How Isis Treats Falmouth Scientific CTD Data
For Falmouth Scientific or similar devices, the following serial port template entries are used to
log the following data from a CTD:
{w} Water Temperature (degrees C)
{p} Pressure (psia)
{c} Conductivity in Siemens per meter
{m} Conductivity in mmho/cm
{v} Sound Velocity
| Turbidity (0 to +5 volts) (optional; use “pipe” symbol)
Appendix G: How Isis Processes CTD Data