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Revision 1.4.16a Page 89
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6.10.5 Temperature Calibration
The temperature calibration screen shown below indicates the sea temperature as measured by the
DST110, which can be changed to the actual sea temperature by following these steps. Use the
Increase ( ) and Decrease ( ) keys to adjust the display value until it matches the known sea
temperature. Press the Accept ( ) key to accept the value when you are satisfied. If you do not
wish to perform temperature calibration at this time, press the Abort ( ) key and the temperature
calibration will not be altered.
Figure 84 - DST110 Water Temperature Calibration Screen
6.10.6 Transducer Depth Offset
The DSM250 can set the transducer depth offset parameter in a DST110 depth/speed/temperature
transducer. If you are interested in the actual water depth (as opposed to the depth beneath the keel),
then you should program a positive value equal to the distance from the waterline to the depth of the
DST110. The DSM250 will then add the measured depth of the water (as seen by the DST110) to the
programmed offset value to produce the total water depth. If you are interested in the depth of water
beneath the keel, then you should program a negative value equal to the distance between the
DST110 and the bottom of the keel. The DSM will then subtract the programmed offset from the
measured depth of the water (as seen by the DST110) showing you the depth of water beneath the
keel.
You program the transducer depth offset by pressing the Enter key ( ) with the “Transducer Depth
Offset:” menu item selected which results in the screen shown in Figure 78.