You can set the temperature offset to compensate for the temperature reading from a temperature-capable sensor.
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Measure the water temperature using the temperature-capable transducer that is connected to the device.
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Measure the water temperature using a different thermometer or temperature sensor that is known to be accurate.
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Subtract the water temperature measured in step 1 from the water temperature measured in step 2.
This is the temperature offset. Enter this value in step 5 as a positive number if the sensor connected to the device measures the water temperature as being colder than it actually is. Enter this value in step 5 as a negative number if the sensor connected to the device measures the water temperature as being warmer than it actually is.
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Select
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Use the arrow keys to enter water temperature offset measured in step 3.