Purging Sampling Valves and Tubes

System Operation

Follow this procedure after meter calibration.

1.Go to Standby mode (remove Mix input).

2.See FIG. 106, page 94. Close both fluid shutoff valves and sampling valves.

3.Route the sampling tubes into a grounded waste container.

4.On a single color system, attach a solvent supply line to Flow Meter A inlet.

5.On the EasyKey, press Setup key and access the Advanced Setup screens.

6.Press the Right Arrow key to select the Calibra- tion screen. Press the Down Arrow key and select Purge from the menu. Press the Enter key.

Dose A, solvent purge valve (B side), and color change solvent valves (if used) will open.

FIG. 107. Calibration Screen

7.To avoid splashing, slowly open the sampling valves and dispense solvent until the valves and tubes are clean.

NOTE: When performing a calibration purge, the solvent valve(s) close automatically after 2 minutes or when Abort is selected on the screen.

8.Close sampling valves.

NOTE: Select Abort on Calibration screen to cancel current calibration and close dose or purge valves.

9.Fully open both fluid shutoff valves.

10.On a single color system, reconnect component A fluid supply line to flow meter A.

NOTE: After calibration it is necessary to clean out con- taminated mix material. Do a manual purge and resume the recipe just tested, or do Recipe 0 then go on to the next recipe.

312779E

TI12553a, TI12552a specifications

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Graco TI12552a, TI12553a Purging Sampling Valves and Tubes, Calibration Screen

Models: TI12553a TI12552a