PNI TCM 5 - Manual (Page 18)

PNI Sensor Corporation Doc #1007537 r12
TCM3 & TCM5 User Manual- Sept 2011 Page 18
Flush Filters:
The filtering is set to only update the filter with the last sample taken, for example once the initial
32 samples are taken any new sample is added to the end with the first sample being dropped.
In the case where the “Acquire Time” is set to a value it would be prudent to set the unit to flush
the filter prior to calculating the heading. This flushing will require the unit to take 32 new
samples to use for the calculation.
Note: If the “Flush Filters” checkbox is checked, it will take longer for the unit to output updated data.
User Cal Settings:
Stability Checking:
By default the unit will wait for the readings to be stable for 3 consecutive readings when in
calibration mode prior to saving the sample for use in the calibration. This is why the unit must be
held steady between points during the User Calibration. This stability helps to ensure a proper
heading and allow for higher accuracy, but it also takes more time. If the user de-selects the
check box, then the unit will NOT wait for a stable reading and instead take a reading once the
minimum change between points threshold has been met.
Automatic Sampling:
When selected the unit will take a point once the minimum change requirement and the stability
check, if selected, has been satisfied. If the user wants to have more control over when the point
will be taken then Auto Sampling should be deselected. Once deselected, the
button on the Calibration tab will be active. Selecting the button will indicate to
the unit to take a sample once the minimum requirements are met.
Calibration Points:
The user can select the number of points to take during a calibration. The minimum number of
points needed for a successful calibration is 12. The unit will need to be rotated through at least
180 degrees in the horizontal plane with a minimum of at least 1 positive and 1 negative Pitch
and at least 1 positive and 1 negative Roll as part of the 12 points.
Enable 3D Model:
Some computer systems may not have the graphics capability to render the 3D Model, for this
reason it may be necessary to turn off this feature.