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Operation
Ratio Check Procedure
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection and
splashing, keep fingers and other body parts away
from the spray tip.
To avoid injury from toxic fluids or fumes, such as
splashing in the eyes or on skin, wear appropriate
personal protective equipment.
Perform the Ratio Check Procedure at startup and after
rebuild.
1. Weigh several small cups and label as indicated.
Record weights.
2. Remove Static Mixer Package (AA, page 8) or night
cap from TC Dispense Valve (AB, page 8).
3. Install the ratio check nozzle onto the TC Dispense
Valve (AB, page 8).
4. Dispense into a waste container to prime the ratio
check nozzle.
5. Place cups as indicated under ratio check nozzle
and cycle the metering unit one time.
44
6. Repeat until all three sets of cups have been used.
7. Re-weigh all cups and record weights.
8. Subtract weight of empty cups from weight of filled
cups to get material weights.
9. Complete ratio calculations.
The following formula can be used when the density or
specific gravity of both the "A" and "B" components are
known and only one of the ratios:
Weight Ratio
Volume Ratio
Example:
A material has a weight ratio of 10:1, the "A" material
has a specific gravity of 1.20 and the "B" material has a
specific gravity of 1.00. To calculate volume ratio:
10:1
Volume Ratio
Volume Ratio
Volume Ratio
NOTE:
If ratio calculations result in NG. Please confirm:
•
Make sure the material pressure of part A and part
B is balanced.
•
There are no air bubbles in the material.
Repeat steps 1 to 8 till the ratio calculations succeed.
Specific Gravity
=
Specific Gravity
1.20
=
1.00
10
=
1.20
=
8.33:1
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