Graco VRM 24F872 Instructions Manual page 30

Operation
12. Select the flow meter types installed on your sys-
tem. Most systems use "HG6000" flow meters for
both sides. If no flow meters are installed, select the
"Disable" option as indicated below and proceed to
step 14.
13. Set the Ratio "Alarm %" to 0 to turn off ratio alarms
and set the Ratio "Deviation %" to any number
greater than or equal to 5%.
NOTE: The "Alarm %" can be turned back on after this
setup and calibration procedure is completed.
14. Set the "Pressure Imbalance Alarm" to 2000 psi
(137.9 bar, 13.8 MPa).
15. Navigate to the main Calibration screen.
30
16. Press .
17. Enter the specific gravities for the two materials in
the system.
NOTE: The specific gravities do not need to be exact
but should be close.
18. Press to exit the Setup screens.
Prime the Machine
Refer to Priming section on page 25.
Piston Position Learning
19. Navigate to the Calibration screen.
20. Perform Learn Mode.
NOTE: Learn Mode will teach the system the mechani-
cal limits of piston travel. It must be performed whenever
the pump line is rebuilt or if any other maintenance is
performed that may affect the mechanical tolerances in
the pump line. If the machine does not appear to be uti-
lizing the full extent of the pump stroke, or if the machine
appears to be contacting the end of the hydraulic cylin-
der, perform the Learn Mode procedure.
a. From the Calibration screen, press
access the Learn Mode screen.
to
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