Troxler EGauge 4590, Manual Of Operation And Instruction

Page: 88 / 186

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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
three to eight 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, 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, contact the nearest Troxler service center for
assistance.
For a list of Troxler and authorized Troxler service centers, refer
to page
iii
of this manual or visit the Troxler website at:
www.troxlerlabs.com/services
.
NOTE
The drift test consists of five 4-minute counts,
whereas the stat test consists of twenty 1-minute
counts. Therefore, each test takes approximately 20
minutes to conduct.
DO NOT turn the gauge off between a stat test and a
drift test.
DO NOT move the gauge between the stat and drift
tests to eliminate possible failure due to positioning
changes.