Troxler RoadReader Plus 3450 - Appendix C. Troubleshooting and Service; Stat Test; This Appendix Provides Details for Troubleshooting and Servicing the

Model 3450
Appendix C–3
STAT TEST
Erratic readings, or readings that seem to fluctuate, may indicate a
problem with the gauge. If the readings are suspect, perform a stat
test, or statistical stability test, to validate the normal operation of
the gauge.
A stat test consists of 20 one-minute counts. From the 20 counts, the
gauge calculates the standard deviation. This standard deviation is
compared to a theoretical standard deviation value. Ideally, this ratio
should be 0.354, with acceptable limits from 0.225 to 0.465. The
gauge is considered unstable if the ratio is outside these limits and
the stat test will fail. If the stat test fails, ensure that the gauge setup
and testing was conducted correctly, and take an additional test. If
the second test fails, call the nearest Troxler service center for
assistance.
To access the Stat Test menu, press the 〈SPECIAL〉 key. At the
Special functions menu, access the Gauge Status/Test menu by
pressing
〈2〉. At the Gauge Status/Test menu, press 〈2〉. The gauge
displays the Stat Test menu:
The following text provides details on the stat test function.
1- Take STAT Test
2- Review STAT Test
3- Print STAT Data
Press ESC To Exit
C. TROUBLESHOOTING