Raymarine Raydata, Installation And Operating Handbook

Page: 40 / 87

Chapter 4: Setup and Calibration 31
Sounder Control
The Sounder Control menu allows you to turn the internal depth
sounder transmitter off, without switching off the RayData. You may
wish to do this if it would otherwise interfere with other equipment, such
as a fish-finder. Use the Setup menu to turn the sounder on again when
required.
If you set the RayData Depth Mode to Repeater (see below), the
sounder is turned off automatically.
Response Level
The Response Level settings control the update rate of the display, for
depth, speed, temperature or heading inputs. Select a value in the
range 1 - 15 seconds. Use a larger response level value to see rapid
changes in the data value, or a smaller response level value to smooth
out changes in the data value.
Mode
The Speed Mode and Depth Mode must be set to indicate the way in
which your system is set up, as follows:
• Leave the mode set to Master if the transducer is connected to the
RayData directly, or if you wish to repeat depth and/or speed and
temperature information from NMEA.
• Set the mode to Repeater if the RayData is primarily a remote
display.
You can only have one Master setting for each mode on your system.
Refer to Appendix B, “Data Sources”, for further information.
4.4 Speed Calibration
You need to calibrate the speed transducer to ensure that the value
displayed on the RayData is accurate.
When making a calibration, the transducer’s apparent speed reading is
compared with the known speed, determined by travelling a known
distance and recording the time taken. The factor required to correct the
transducer’s speed reading is stored by the RayData or entered
manually as a calibration factor. The factor is applied to the speed
transducer data to obtain the correct value on the display.