Graco g250, G3000HR Operation, Pressure Relief Procedure Flow Volume Range, Flow Meter Function

Operation

Operation

Pressure Relief Procedure Flow Volume Range

1.Shut off the fluid supply to the meter.

2.Shut off all electrical power to the fluid system.

3.Follow the Pressure Relief Procedure for your fluid system dispensing device.

Flow Meter Function

This is a positive displacement, gear flow meter. The gear flow meter is highly accurate, even with low flow rates. The fluid flowing through the meter rotates the gears. The gear tooth is picked up by a sensor device, which produces an impulse for every gear tooth passing by.

Recommended Usage

Do not exceed the maximum working pressure of your meter or any component or accessory in your system.

•See the Technical Data for fluid and ambient tem- perature limits.

•Only use the flow meter with fluids that are compati- ble with the “Wetted Parts” listed in the Technical Data.

The G3000 and G250 meters flow volume range is 0.02-1.0 gal./min. (75-3800 cc/min.).

The G3000HR and G250HR meters flow volume range is 0.01-0.5 gal./min. (38-1900 cc/min.).

NOTICE

The flow meter gears and bearings can be damaged if they rotate at too high a speed. To avoid high speed rotation, open the fluid valve gradually. Do not over-speed the meter with air or solvent. To prolong meter life, do not exceed the meter’s maximum flow rate.

Checking the Meter Accuracy

1.To check the accuracy of the meter, turn your gun fan and atomizing air off, then trigger the fluid into a graduated cylinder; dispense at least 500 cc of fluid.

2.Measure the volume of fluid in the beaker in cubic-centimeters (cc) and read the volume on the flow meter monitor.

G3000 and G250: If the flow meter scale factor is not between 0.112-0.140 cc/pulse, follow the clean- ing procedure on page 10, then recalibrate the flow meter.

G3000HR and G250HR: If the flow meter scale fac- tor is not between 0.05-0.07 cc/pulse, follow the cleaning procedure on page 10, then recalibrate the flow meter.

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