Graco 234129, Instructions Manual

Page: 36 / 108

Configuring Software
36 309738L
Verifying Flow Meter
Calibration
Most sealant and adhesive materials are compressible.
Since the flow meter is measuring the material under
high pressure, the actual volume of material dispensed
may vary slightly from the measured volume, due to this
compressibility. If the K-factor is not correct, the dis-
played volume will not be accurate.
Follow this procedure to calibrate the flow meter during
initial setup and on a routine basis to check for flow
meter wear.
Method 1. Using a gram scale
1. Obtain a beaker, 500 cc or larger, and measure the
mass of the empty beaker.
2. Manually dispense material into the beaker. Hold
the beaker so that the stream of material is sub-
merged in the captured material. This is to minimize
air entrapment in the container.
3. Record the volume dispensed on the Run screen
and the flow meter K-factor from the Setup Other
screen.
4. Calculate the actual volume dispensed:
5. Calculate the new flow meter K-factor:
6. Enter new K-factor.
7. Repeat the procedure to verify the new K-factor.
Method 2. Without using a gram scale, visual mea-
surement
1. Obtain a beaker, 500 cc or larger with measurement
increments.
2. Manually dispense material into the beaker. Hold
the beaker so that the stream of material is sub-
merged in the captured material. This is to minimize
air entrapment in the container.
3. Record the volume dispensed on the Run screen
and the flow meter K-factor from the Setup screen.
4. Settle the material into the beaker and view the
actual volume dispensed.
5. Calculate the new flow meter K-factor:
6. Enter new K-factor.
7. Repeat the procedure to verify the new K-factor.
Other Software Settings
There are various software settings that are preset at
the factory, based on the system configuration that was
ordered. A quick check of these variables is recom-
mended. See
Table 5 - PrecisionFlo LT User Vari-
ables and Presets and Table 6 - PrecisionFlo LT
System Variables .
The PrecisionFlo LT User Interface screens are listed
in Appendix B beginning on page 84 to guide you
through the process.
fluid mass (g)
density (g/cc)
=
measure volume (cc)
K-Factor (new) =
displayed volume (cc) x K-Factor (old)
measured volume (cc)
K-Factor (new) =
displayed volume (cc) x K-Factor (old)
dispensed volume (cc)