PICO
Toµch
Series Controllers
18
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Install the Valve and the Controller (continued)
6a
6b
6c
6h
6f
6g
CAUTION
Do not dry cycle the
Pµlse
valve!
The ceramic nozzle seat and ball can
be damaged if the valve is operated without fluid, causing leakage and a
poor seal. Precise dispensing can no longer be guaranteed if this occurs.
6.
Start up and test the system as follows:
a.
Switch the
Toµch
controller power ON and complete the
touchscreen calibration as prompted (required only at
initial startup).
b.
(Heated systems only):
• Press the HEATERS icon (
) and then enter a
temperature SETTING that is just above the ambient
temperature (or as appropriate for the fluid).
• Press ON to switch the HEATERS mode to On.
• Wait for the system to reach temperature setpoint.
NOTE:
The HEATERS screen shows the actual
temperature of the valve.
c.
IMPORTANT:
Press the VALVE icon (
) and then press
POWER to switch the valve ON.
d.
Introduce fluid to the system.
e.
Set the reservoir pressure lower for thin fluids and higher
for thick fluids [approximately 0.4–1.0 bar (5–15 psi),
depending on the fluid]. For tanks, use the in-line air
shut-off valve to pressurize or de-pressurize the fluid
supply. For syringe barrels, connect or disconnect the
adapter assembly from the reservoir pressure regulator
and gauge.
f.
Press the PURGE icon (
) and allow fluid to purge from
the system until the fluid flow is steady.
g.
Press MODE and enter the following recommended
settings to test an actual deposit:
• MODE = Timed
• PULSE = 0.5 (ms)
• CYCLE = 5 (ms)
• COUNT = 10
h.
Press the CYCLE icon (
).
The system dispenses 10 deposits and displays the
frequency (FREQ) indication on the VALVE screen.
i.
Make parameter adjustments until the desired deposit
result is achieved. Use caution not to exceed maximum
frequency ranges.
