Graco XM Series Operation page 55

10. Dispense fluid B as follows:
a. Batch dispense: move container under
sampling valve B (AF).
Ratio check: place clean container under
sampling valve B (AF).
b. Slowly open and adjust sampling valve B (AF)
to achieve desired flow. The pump stops
automatically when dispense completes. Pump
B light (DK) turns off.
c. Close sampling valve B (AF).
11. Batch dispense: stir material until mixed.
Ratio check: compare A and B fluid dispensed.
Confirm Batch Dispense Test
The Confirm Batch Dispense Test screen displays when
the batch dispense test completes without error. This
screen displays the selected ratio between the metering
pumps and the volume of material dispensed from each
metering pump.
The gray at the bottom of the beaker represents the
volume of material dispensed by metering pump A and
the black at the top of the beaker represents the volume
of material dispensed by pump B.
Enter the volume of each sample in the A and B input
boxes. The system will calculate the ratio and display a
312359R
check in the box if it is within tolerance. The result of the
test is also entered in the USB log.
Down Stream Valve Leak Test
This test confirms or troubleshoots leaks in components
located down stream of the dosing valves. Use this test
to detect closed or worn valves, and to detect leaks in
circulation valves installed at a remote mix manifold.
1. Close both mix manifold valves downstream of the
dosing valves.
2. Close recirculation valves (AC, AD).
3. Enter Test mode in the run (fluid control) screen.
See Test Screens on page 86. Select
down stream valve leak test.
4. Select Press
.
(AA, AB) are open by verifying blue LEDs are
illuminated for both dosing valves.
5. If test is successful, both pumps will stall against the
down stream valves when the dosing valves (AA,
AB) are open. If any movement is detected in the
pumps after stalling, an alarm is issued indicating
which side has a leak.
System Verification
to run
. Ensure dosing valves
55