Flow Meter Calibration; Dispense Verification - Graco PR70 Operation & Maintenance Manual

Flow Meter Calibration

Prepare for Calibration
1. Verify the piston position is calibrated. See Piston
Position Calibration, page 38.
2. Verify the dispense head is properly primed. See
Prime the Dispense Head, page 40.
3. Verify the machine is properly phased. See Phas-
ing Adjustment, page 41.
4. Verify the dispensing ratio is adjusted as needed.
See Calibrate Dispense Weight Ratio (PR70v
only), page 45.
5. Retrieve multiple waste containers.
6. Locate a weigh scale near the machine.
7. Clean the surface below static mixer of any debris
or materials that might cling to the waste container
and affect weight measurements.
8. Install ratio check nozzle onto dispense valve.
F . 31: Ratio Check Nozzle
IG
9. Prime the dispense head. See Prime the Dispense
Head, page 40.
10. Navigate to the Flow Meter Calibration screen. See
Screen Navigation Diagram, page 17.
Perform Flow Meter Calibration Shot
11. Place a waste container under the dispense valve to
capture any dispensed material.
12. Label one scale as "A" and a second scale as "B".
13. Label one new container as "A" and a second new
container as "B".
14. Place container "A" on scale "A" and tare the scale.
Place container "B" on scale "B" and tare the scale.
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15. Place container "A" under the A material output of
the ratio check nozzle. Place container "B" under
the B material output of the ratio check nozzle.
16. Press the Flow Meter Calibration button (
enter calibration mode.
17. Press the Start/Stop Shot button (
foot-switch to dispense material.
18. Place container "A" on scale "A" and note the
weight. Place container "B" on scale "B" and note
the weight.
19. Enter the A material weight in grams using numeric
keypad.
20. Press the Enter button (
or press the "0" button on the numeric keypad
repeatedly to clear out the entry then re-enter.
21. Enter the B material weight in grams using numeric
keypad.
22. Press the Enter button (
or press the "0" button on the numeric keypad
repeatedly to clear out the entry then re-enter.
23. Repeat the previous steps as desired for additional
accuracy. The display module will automatically cal-
culate an average weight for each material.

Dispense Verification

See Dispense Check Options, Screen #4, page 32.
Setup
) to
) or the
) to accept the number
) to accept the number
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