System Verification; Pump And Metering Test And Calibration For Ratio By Weight Mode - Graco XM PFP Setup & Operation

System Verification

System Verification
Pump and Metering Test and
Calibration for Ratio by Weight
Mode
This test checks the following five items and should be
run every time a new job is started, or if there is a
suspected problem.
• Verifies that the metering pumps installed match the
metering pumps selected on the Setup screen by
dispensing exactly 750 ml of each material.
• Verifies that each metering pump holds fluid against
the metering pump inlet valve by stalling on the
down stroke.
• Verifies that each metering pump holds fluid against
the metering pump piston valve and packings by
stalling on the upstroke.
• Verifies that each metering valve holds fluid and that
there are no external leaks between the metering
pump and metering valve.
• Verifies that the recirculation valves (AC, AD) are
closed and do not leak.
• If system Ratio Mode is set by weight, this test
calibrates the weight ratio. Ratio Mode by weight is
the standard setting.
This test will dispense 750 ml of component A, and then
750 ml of component B. Dispense into separate cups so
the fluid can be returned to the supply tanks.
NOTE: During each dispense the flow will stop once to
stall the upstroke, once to stall the downstroke, and then
it will finish the dispense. Do not close the sampling
valve until the fluid flow stops and the blue metering
pump light (DK) goes out.
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NOTE: Material hoses from the system to the mix
manifold must be filled with material and pressurized for
testing to be successful.
NOTE: Each sampling valve must be primed prior to
beginning this procedure to ensure best accuracy. If the
clear tube connected to the sampling valve is not filled
with material, prime the sampling valves.
1. Verify the clear tube connected to each sampling
valve is filled with material. If not, perform the
following steps to ensure accuracy of the metering
test.
a. Turn metering pump air supply valve on.
b. At the main run (fluid control) screen, press
to enter manual pump run mode.
c. Press repeatedly to select
.
d. With a waste container beneath the sampling
valve, slowly open the valve until material
begins to slowly dispense. Once clean material
dispenses from the sampling valve, and the
clear tube is completely filled with clean
material, press
with the other side if necessary.
2. Enter Test Screens (see page 78).
. Press
to stop dispensing. Repeat
3A2776K