Normal Mode
3.6.1 Preparation
Pick a location on the asphalt that is dry. Designate an area approximate 10 feet
long and 5 feet wide on the asphalt mat. Divide the area into five data locations.
See Fig. 3.6.1.
3.6.2 Calibration Readings
Use the PQI in the Single Reading Mode.
Place the PQI in the first location on the asphalt mat. Using a crayon marker
draw a circle around the PQI. The round sensor plate may be used as a guide.
Press the ENT key,
(DO NOT TOUCH THE PQI)
and wait for a reading to
complete. Record the density reading.
HINT: Better readings are taken if no hands or objects are in contact with
the PQI.
Move the PQI approximately 2 inches up and to the right on the outside of the
circle. Consider this position as the 2 o’clock location. Press the ENT key to take
another reading and record it in the table given in the back of this manual.
Move the PQI clockwise around the marked circle to about the 4 o’clock
position. Press the ENT key to take another reading and record it in the table.
Continue to move the PQI in clockwise steps around the marked circle stopping
at the 8 o’clock and 10 o’clock positions to take and record density readings.
Following the pattern in Fig. 3.6.2, move the PQI to the next circle location,
record a density reading in the center and at each clock position, in turn, until the
table is complete.
1
2
3
4
5
1
2
3
4
5
Figure 3.6.1 Reading Location Layout
Figure 3.6.2 PQI Measurement Pattern
14
Summary of Contents for PQI 301
Page 1: ...Pavement Quality Indicator Model 301 Operators Handbook ...
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