142 G-TECH / Pro Competition User Guide, Release 3.1
Accelerometer Tips
Hold the G-tech as still as possible during the accelerometer
calibration procedure. You may find that it helps to rest the
G-tech against something like a table or a wall during the pro-
cedure.
If you hold the G-tech in an incorrect orientation at any point
during the accelerometer calibration procedure, the G-tech
will notify you with a message on the screen.
A blinking black rectangle on the display during calibration
indicates that the G-tech is seeing shaking/movement. Try to
hold the G-tech as still as possible. If you cannot get the rect-
angle to go away, please call Tesla Technical Support at (310)
452-0030.
Ensure that you calibrate the accelerometers at two different
times, as far apart in operating temperature as possible
(p. 35). Our recommended calibration procedure for acceler-
ometers is:
1. Put the G-tech into Configuration Mode and then
power it off.
2. Let the G-tech sit powered off for at least 12 hours at
room temperature.
3. Power on the G-tech and immediately
perform a cali-
bration (p. 28). This would be the “cold” calibration.
4. Leave the G-tech powered on for at least 1 hour so that
it reaches full operating temperature.
5. Perform a second accelerometer calibration. This would
be the “warm” calibration.
After performing the “cold” and “warm” calibrations, go to
the G-tech’s X-Y-Z Gs screen (p. 143). While holding the G-
tech very still, ensure that the “Mag” value is always between
0.995G and 1.005G, at all temperatures and orientations.
Note:
The “Mag” value will always fluctuate a little due to
vibrations, etc. As long as the displayed value is within this range,
the calibration is fine.
If the “Mag” value is not always between 0.995G and 1.005G:
• Erase the accelerometer calibration data (p. 144)
• Re-calibrate your accelerometers at 2 different tempera-
tures (p. 28, p. 35)
Note: DO NOT CALIBRATE ACCELEROMETERS or ERASE ACCELEROMETER CALIBERATION
on G-tech units which were shipped after August 2003. They have already been calibrated in the
factory. Older G-techs will automatically request calibration. If you are unsure contact tech support.
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