Continuous Mode [B]
Batt: 12.7V
H2O: 3.2 187.6 F
D: 156.5 Lb (87.8%)
Line 1: Always reads “Continuous Mode”. [ ] Indicate pavement type selected.
Line 2: Displays the battery voltage. A fully charged battery will usually read
approximately 13.8 V and the voltage will decrease as the battery is
discharged. The PQI should be recharged if the battery voltage is less
than 11.6 volts. If the battery voltage is less than 11.0 volts the PQI will
stop operating and simply display a “Battery Low” message.
Line 3: Displays the moisture index and the mat temperature. The moisture
index gives a relative indication of the amount of moisture in the mix or
on the surface of the mat.
Line 4: Displays the density in actual units and in percent. The density will be
displayed either in lbs/ft3 or kg/m3.To change the units, go to the
Setup Menu and select ‘Displayed Units’ and the select ‘Density’. The
percent density will be displayed in either percent compaction or percent
voids. If displaying percent compaction, the value will be enclosed in
“( )”. If displaying percent voids, the value will be enclosed in “[ ]”.
To change between these units, go to the Setup Menu and select
‘Displayed Units’ and the select ‘%’. Remember that the percentage
values will not be accurate unless you have properly entered the MTD
value of the mix you are currently measuring.
If the PQI is running in Continuous Mode and no keys have been pressed for
the last 5 minutes, the PQI Mode will enter a Power Save Mode. Much of the
electronics will be turned off to conserve battery life and the message “Power
Save Mode – Type Key to Continue” will be displayed. To resume readings,
simply press any key.
Note: While the PQI will take continuous readings in Continuous Mode, the
readings are only valid when the PQI is properly positioned and the
operator is not touching the PQI.
3.7.2 Single Reading Mode
The single reading mode takes a density reading within five seconds. This mode
requires the Enter key to be pressed to start each reading. When the PQI is not
actually taking a reading, this mode helps to conserve the battery, by shutting
down the signal amplifier. The information displayed in this mode is very similar
to the Continuous Mode.
Example of Continuous Mode Screen
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Summary of Contents for PQI 301
Page 1: ...Pavement Quality Indicator Model 301 Operators Handbook ...
Page 36: ... ...