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Setup
312759R 47
Shot Calibration
To dispense accurate quantities of material, a few small
and large calibration shots must be performed. Once the
weights are entered, the machine will calculate an aver-
age weight for the small and large calibration shots.
Prepare for Calibration
1. Verify the piston position is calibrated. See Piston
Position Calibration, page 37.
2. Verify the dispense head is properly primed. See
Prime the Dispense Head, page 39.
3. Verify the machine is properly phased. See Phas-
ing Adjustment, page 40.
4. Verify the dispensing ratio is adjusted as needed.
See Calibrate Dispense Weight Ratio (PR70v
only), page 44.
5. Retrieve multiple waste containers.
6. Locate a weigh scale near the machine.
7. Install a static mixer.
8. Prime the dispense head. See Prime the Dispense
Head, page 39.
9. Clean the surface below static mixer of any debris or
materials that might cling to the waste container and
affect weight measurements.
10. Navigate to the Calibration screen. See Screen
Navigation Diagram, page 16.
Perform Small Calibration Shots
11. Press Small Calibration Shot button ( ) to enter
calibration mode.
12. Use the numeric keypad to enter the ratio arm set-
ting. Valid entries are 1.0 to 2.0 in 0.1 increments.
13. Press the Enter button ( ) to accept the value.
14. Weigh one clean waste container and tare the scale.
15. Place container under static mixer.
16. Press the Start/Stop Shot button ( ) or the foot-
switch to dispense material.
17. Weigh container.
18. Enter weight in grams using numeric keypad.
19. Press the Enter button ( ) to accept the number
or press the “0” button on the numeric keypad
repeatedly to clear out the entry then re-enter.
20. Repeat steps 14 through 19 as needed. Graco rec-
ommends repeating steps 14 through 19 at least
four more times. The machine will automatically cal-
culate the average weight of the calibration shots.
21. Press Small Calibration Shot button ( ) to exit
calibration mode.
Perform Large Calibration Shots
22. Press Large Calibration Shot button ( ) to enter
calibration mode.
23. Weigh one clean waste container and tare the scale.
24. Place container under static mixer.
25. Press the Start/Stop Shot button ( ) or the foot-
switch to dispense material.
26. Weigh container.
27. Enter weight in grams using numeric keypad.
28. Press the Enter button ( ) to accept the number
or press the “0” button on the numeric keypad
repeatedly to clear out the entry then re-enter.
29. Repeat steps 23 through 27 as needed. Graco rec-
ommends repeating steps 23 through 27 at least
four more times. The machine will automatically cal-
culate the average weight of the calibration shots.
30. Press the Large Calibration Shot button ( ) to
exit calibration mode.