Troxler Enhanced RoadReader Plus 3451 Manual Of Operation And Instruction page 194

✓ Ensure the source rod handle is fully latched in the SAFE
(shielded) position.
✓ Check that the gauge is positioned correctly on the reference
standard block (see Figure 4–2 on page 4–3).
✓ Perform the standard count again. If the standard count still
fails, contact the nearest Troxler Service Center.
GAUGE READINGS APPEAR ERRATIC
✓ If taking readings in the backscatter position, ensure the source
rod is properly locked in the notch and not resting on the test
material.
✓ Check the inside of the gauge for moisture. If necessary, use a
hair dryer (on low heat) to circulate warm air for one to three
hours.
✓ Remove any foreign objects from inside the gauge.
✓ Ensure the hardware mounting screws are tight and in place.
✓ Check count time – a four-minute count will give the highest
precision, with a repeatability of ±1 pcf on repeated tests
performed without moving the gauge.
✓ Erratic density readings may be caused by a dirty tungsten
sliding block. Clean the sliding block (see page A–11).
✓ Perform a stat test:
 If test passes, proceed with job.
 If test fails, repeat two more times. If test fails two out of
three times, contact the nearest Troxler Service Center.
GAUGE TURNS OFF AFTER IT IS TURNED ON
✓ If the rechargeable battery is below 5.5 volts, recharge or
replace the batteries (see page C–24).
Model 3451 Appendix C–11