308783
25
Ratio Check
Check the ratio at least once per month, as part of a
regular maintenance routine, and anytime a flow meter
is changed.
WARNING
PRESSURIZED EQUIPMENT HAZARD
To avoid splashing fluid in the eyes when
performing a ratio check or purging:
Wear eye protection.
Only open the ratio check valves enough to
allow fluid to flow at a rate of 100 to 200 cc per
minute.
CAUTION
The fluid shut-off valves and ratio check valves are
retained in their housings by mechanical stops that
prevent accidental removal of the valve stem while
the manifold is pressurized. If manual force cannot
turn the valve stems, the system pressure must be
relieved and the valve properly disassembled and
cleaned to remove the resistance.
Reference
T
W
KEY
T
Fluid Shut-off Knobs
W Ratio Check Valve Knobs
T
7384B
1.
Make sure the operator switch is set
at standby.
7475A
2.
Turn off all the spray or dispense devices con-
nected to the ProMix.
3.
Close both fluid shut-off valves (T) and ratio check
valves (W) by turning the knobs in.
7480A
61
4.
Make sure the two bea-
kers (61) and the ratio
dispense tubes are in
place.
NOTE:
Use 5/32”
I.D. tubing for the
ratio dispense tubes.
5.
Touch the token to the setup contacts. 1 appears
on the display, indicating the control is at level 1
setup. The last known target ratio will also display.
Target Ratio
Setup Level