Troxler RoadReader Plus 3450 - Drift Test

Model 3450
Appendix C–5
DRIFT TEST
If the gauge passes the stat test, but shows long-term drift between
measurements, perform a drift test to check the long-term drift of
the gauge. A drift test consists of five counts taken 3 to 8 hours after
a stat test with no movement of the gauge between tests. The gauge
sets the pass/fail limits based on the percent difference between the
average of the stat test and drift test results. If the percent difference
exceeds 0.5 percent for density counts or 1 percent for moisture
counts, then the drift test fails. If the drift test fails, ensure that the
gauge setup and testing were conducted correctly, and take an
additional test. If the second test fails, call the nearest Troxler
service center for assistance.
NOTE
The drift test consists of five 4-minute count, whereas
the stat test consists of twenty 1-minute counts.
Therefore, each test takes approximately twenty minutes
to conduct. DO NOT turn the gauge off between a stat
test and a drift test. The drift test should be taken in the
same location as the stat test.
DO NOT move the gauge between the stat and drift tests
to eliminate possible failure due to positioning changes.
To access the Drift 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 〈3〉. The gauge
displays the Drift Test menu:
The following text provides details on the drift test.
1- Take Drift Test
2- Review Drift Test
3- Print Drift Data
Press ESC To Exit
C. TROUBLESHOOTING