Once connected, you may press any of the following one-letter (upper or lower
case) commands:
C: Clear (erase) the PQI’s Data Log
N: Print the number of entries in the PQI’s Data Log
L: Print all Data Log entries in a readable format
X: Print all Data Log entries in a spreadsheet-readable format so the
data can be easily imported into a spreadsheet such as Microsoft
Excel.
G: Print the last set of readings taken in Segmentation Mode.
T: Enter a new title for the PQI. The title is displayed on the PQI when
power is first applied. To change the title, type ‘T’ and then type the
title. This is a simple title entry function and backspacing is not
allowed. If you make a mistake, you must reenter the correct title.
H: Print a list of all the commands
E: Instruct the PQI to exit Remote Mode.
5.0 Routine Operations
Once calibrated the PQI is ready to be used at each job site and asphalt mix. It
is suggested that 5 or more readings be taken at each site following the reading
pattern of Fig. 3.6.2 .
Keep PQI bottom surface clean and dry
For accurate readings, the PQI should have a clean, dry, smooth interface with
the mat. Therefore, you should wipe the PQI probe surface dry and clean after
each reading. Also, before placing the PQI on the mat, you should check the
surface of the mat to make sure there is no loose material on the surface, which
would prevent the PQI from seating properly. If a buildup of asphalt begins to
form on the probe surface, clean the surface with WD-40.
Choose measurement spots that are dry
While the PQI contains moisture correction algorithms, the most accurate
readings will be obtained if areas with low moisture levels are measured. If a
measurement area has noticeable surface moisture, you should either wait for the
moisture to evaporate or remove the moisture with an absorbent cloth.
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Summary of Contents for PQI 301
Page 1: ...Pavement Quality Indicator Model 301 Operators Handbook ...
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