Temperature Calibration. Maretron DSM250-01

DSM250 User’s Manual

6.1.8 Temperature Calibration

The temperature calibration screen shown below indicates the sea temperature as measured by the

Airmar temperature transducer, 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 36 – Airmar Temperature Transducer Water Temperature Calibration Screen

6.1.9 Transducer Depth Offset

The DSM250 can set the transducer depth offset parameter in an Airmar depth 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 depth transducer. The DSM250 will then add the measured depth of the water (as seen by the depth transducer) 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 depth transducer 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 depth transducer) 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.

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