Garmin GPSMAP 441s Owner's Manual - Page 61

Setting the Water Temperature Offset, Temp Offset, Calibrate Water Speed

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3. Enter the distance measured in step 1. Ensure that you enter a positive or a negative number based on the location of the transducer. 4. Select Done to accept the number. Transducer at Surface A (+) positive number shows depth at the bottom of the keel. Transducer at the Bottom of the Keel A (-) negative number shows depth at the surface. Temp Offset-set the temperature offset for the temperature sensor of your transducer. Setting the Water Temperature Offset You must have a NMEA 0183 water-temperature sensor, a Garmin Intelliducer, or a temperature-capable transducer to measure water temperature. GPSMAP 400/500 Series Owner's Manual Configuring the Chartplotter The temperature offset compensates for the temperature reading from a temperature sensor. 1. Measure the water temperature using the temperature sensor or temperature-capable transducer that is connected to the chartplotter. 2. Measure the water temperature using a different temperature sensor or a thermometer that is known to be accurate. 3. 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 chartplotter 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 chartplotter measures the water temperature as being warmer than it actually is. 4. From the Home screen, select Configure > My Boat > Temp Offset. 5. Enter the temperature offset calculated in step 3. 6. Select Done. Calibrate Water Speed-use this menu to calibrate a speed-sensing device. Follow the on-screen directions for calibration. If you do not have a speed-sensing device, this menu does not appear. NOTE: If the boat is not moving fast enough or the speed sensor is not registering a speed, a "Speed Too Low" message appears. 55

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GPSMAP 400/500 Series Owner’s Manual
55
Configuring the Chartplotter
3. Enter the distance measured in step 1. Ensure that you enter
a positive or a negative number based on the location of the
transducer.
4. Select
Done
to accept the number.
A (+) positive number
shows depth at the bottom
of the keel.
Transducer at Surface
A (-) negative number
shows depth at the
surface.
Transducer at the
Bottom of the Keel
Temp Offset
—set the temperature offset for the temperature sensor
of your transducer.
Setting the Water Temperature Offset
You must have a NMEA 0183 water-temperature sensor, a Garmin
Intelliducer, or a temperature-capable transducer to measure water
temperature.
The temperature offset compensates for the temperature reading
from a temperature sensor.
1. Measure the water temperature using the temperature sensor
or temperature-capable transducer that is connected to the
chartplotter.
2. Measure the water temperature using a different temperature
sensor or a thermometer that is known to be accurate.
3. 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 chartplotter
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 chartplotter measures the water temperature as
being warmer than it actually is.
4. From the Home screen, select
Configure
>
My Boat
>
Temp
Offset
.
5. Enter the temperature offset calculated in step 3.
6. Select
Done
.
Calibrate Water Speed
—use this menu to calibrate a speed-sensing
device. Follow the on-screen directions for calibration. If you do not
have a speed-sensing device, this menu does not appear.
NOTE:
If the boat is not moving fast enough or the speed sensor
is not registering a speed, a “Speed Too Low”
message appears.