Graco 312776F Manual De Usuario
Meter Calibration
66
312776F
8. Dispense component A, B, or Solvent into beaker.
a. To avoid splashing, slowly open sampling
valves.
b. For more accurate calibration, adjust the valve
to dispense at a flow rate similar to your produc-
tion spray flow rate.
tion spray flow rate.
c. Dispense a minimum of 250 cc; make sure
enough material is dispensed to accurately read
the volume with your beaker. The A and B vol-
umes do not have to be equal or at any particu-
lar ratio.
the volume with your beaker. The A and B vol-
umes do not have to be equal or at any particu-
lar ratio.
d. Close sampling valve tightly.
9. The volume that the ProMix measured displays on
the EasyKey.
10. Compare the amounts on the EasyKey to the
amount in the beakers.
NOTE: For maximum accuracy, use a gravimetric
(mass) method to determine the actual volumes dis-
pensed.
(mass) method to determine the actual volumes dis-
pensed.
11. If the screen and actual volumes are different, enter
the actual dispensed volume in cc for A, B, or Sol-
vent Volume field, and press the Enter
vent Volume field, and press the Enter
key
.
If the value was substantially different, repeat the
calibration process.
calibration process.
NOTE: If the screen and actual volume is the same
or if for any reason you want to cancel the calibra-
tion procedure, scroll to Abort on the Calibration
Screen menu and press the Enter
or if for any reason you want to cancel the calibra-
tion procedure, scroll to Abort on the Calibration
Screen menu and press the Enter
key
.
12. After the volume for A, B, or Solvent is entered, the
ProMix 2KS controller calculates the new flow meter
K-factor and shows it on the Calibration Screen.
K-factor and shows it on the Calibration Screen.
NOTE: K-factor values on the screen are viewable
only. If needed, you can manually edit the K-factors
in Advanced Setup Screen 4 (page 36) or Recipe
Setup Screen 5 (page 41).
only. If needed, you can manually edit the K-factors
in Advanced Setup Screen 4 (page 36) or Recipe
Setup Screen 5 (page 41).
13. Always purge sampling valves after calibrating
meters. Use one of the following methods.
•
Follow the Purging Sampling Valves and
Tubes procedure, page 62.
Tubes procedure, page 62.
•
Place the sampling valve fluid tubes into a com-
patible cleaning fluid (TSL or solvent) or cap
them.
patible cleaning fluid (TSL or solvent) or cap
them.
NOTE: If fluid hardens in sampling tubes, replace
them with 5/32 in. or 4 mm OD tubing.
them with 5/32 in. or 4 mm OD tubing.
14. Make sure both sampling valves are closed and
both fluid shutoff valves are fully open.
15. Before you begin production, clear the system of
solvent and prime it with material.
a. Go to Mix mode.
b. Trigger the gun into a grounded metal pail until
mixed material flows from the gun nozzle.