PICO Toµch Controller
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CAUTION
Do not dry cycle the Pµlse valve! The ceramic nozzle seat and ball can
be damaged if the valve is operated without uid, 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 uid).
• 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 uid to the system.
e. Set the reservoir pressure lower for thin uids and higher for thick
uids [approximately 0.4–1.0 bar (5–15psi), depending on the
uid]. For tanks, use the in-line air shut-off valve to pressurize
or de-pressurize the uid supply. For syringe barrels, connect
or disconnect the adapter assembly from the reservoir pressure
regulator and gauge.
f. Press the PURGE icon ( ) and allow uid to purge from the
system until the uid ow 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.
Install the Valve and the Controller (continued)
6a
6b
6c
6h
6f
6g
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