KVH Industries TracVision G4 User Manual download pdf (Page 78)

Entering Gyro Offset Values

The sensor module housing must be mounted as close to level in

pitch and roll as possible, with its long axis parallel to the vessel’s

centerline. Sometimes allowances must be made for the particular

installation where pitch, roll, and azimuth references cannot be

met. The offset values adjust for this. The allowable offset values

for pitch and roll are ±45º; the offset for azimuth can be up to

±180º. Once entered, offset values will not need to be changed

unless the sensor module is relocated.

Using the ADCU Interface

54-0147

Proceed to

"Choosing the

Default Display"

Set Gyro offsets?

Yes Next Return

Set offset Pitch?

Yes Next Cancel

Set Pitch: +XX.X°

- Enter +

Set offset Roll?

Yes Next cancel

Set Roll: +XX.X°

- Enter +

Set Yaw: +XXX.X°

- Enter +

Set offset Yaw?

Yes Next Cancel

Figure 3-18

Entering Gyro Offset Values

Pitch, roll, and yaw settings are

determined by the sensor module’s

internal inclinometer, not external

measurements.

To set pitch, roll, and yaw properly,

initially enter zeros for all

measurements. Choose the Pitch,

Roll, and Yaw display from the Main

Menu and record those numbers.

Reverse the value of the Pitch and

Roll (positive becomes negative,

negative becomes positive).

Return to the Gyro Offset menu

and enter the recorded numbers.

This process should be carried out

in still water or at the dock.

As noted in

Section 2.3, “Mounting

the GyroTrac Sensor” on page 19,

the sensor must be aligned to

within ±5

of the vessel’s fore-and-

aft centerline. Deviation beyond ±5

will degrade pitch, roll, and yaw

accuracy.

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KVH Industries TracVision G4 User Manual Page 78

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