Square Wave 745NC Non-Contact Dispense Valve
6
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5. Connect the 745NC Square Wave valve with a 4 watt solenoid to a
ValveMate
™
8000 controller.
*IMPORTANT NOTE:
Only a 745NC valve installed with a 4 watt
solenoid can be used with the ValveMate 8000 controller.
a. Follow steps 1 through 4 on page 4.
b. Connect the 745NC valve to the ValveMate 8000 controller
using the solenoid wires supplied. See Figure 2.
NOTE:
Installing the Dispense Valves
The ValveMate 8000 is supplied with an installation manual. The
manual will explain the operation of the ValveMate 8000 and input /
output connections for 745NC valve initiate.
6. Purge valve:
a. Set reservoir pressure to 0.275 bar (4 psi) as a minimum starting point.
b. Remove retaining nut to release nozzle plate.
c. Set valve stroke between 10–20 on reference ring.
d. Cycle valve at 50Hz minimum at 50% duty for purging.
CAUTION
CAUTION
for 24 watt solenoid only:
Minimum dispensing frequency is
50Hz. Operating frequencies lower than the minimum requirement will cause
solenoid failure.
e. Cycle valve until fluid lines are free from air.
f. Replace nozzle plate / retaining nut onto valve.
7. Set desired flow rate:
a. Set reservoir pressure to 0.275 bar (4 psi) as a minimum starting point.
b. Set valve stroke control to 1 hash mark (one click from zero) on stroke
reference ring as starting point.
c. Set frequency / duty cycle to 100Hz and 50% duty to establish initial
dispense volume. Adjust frequency/duty cycle to achieve desired flow
rate.
NOTE:
Refer to Figure 3 on opposite page as a guide for dispensing
volume as a function of frequency and fluid pressure.
Figure 2
NOTE:
Use the blue and
brown wires of the bullet
solenoid cable for BackPack
valve actuation. The wires are
not polarized.
Operation of a Spike and Hold Driver Circuit
