4–6
PRESSURE
NOTE
For optimum performance—if operating the compactor
at a ram pressure other than 600 kPa—calibrate the
specimen height and gyration angle after changing the
ram pressure (see page 3–7).
The Pressure Verification Kit includes all the equipment needed to
calibrate and/or verify the compaction pressure, including a
calibration load cell.
Before calibrating or verifying the pressure, clean the compactor
and connect the load cell as described below:
To remove any grease or asphalt, clean the mold tray, ram head,
lower carriage plate, upper carriage assembly, and upper puck
plate (see Figure 2–2 on page 2–9) with Bindoff or similar
cleaner.
Connect the load cell as follows:
Using the supplied serial cable, connect the load cell to the
control unit’s serial port.
Connect the dc charger to the load cell, and plug the charger
into an electrical outlet.
To begin pressure calibration, press 1 at the Calibration menu
shown on page 4–5. The compactor displays:
Connect Load cell to
ser. Port. Set it in
chamber (ON A PUCK!)
Press <ENTER>
CAUTION
Ensure that the load cell is placed on a puck as
described below. Failure to do so will cause damage to
the load cell.
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