Valve Control
Valve control examples
200
liquid sampler and sample tray in an analytical sequence. The multiposition valve
becomes the sample tray; the gas sampling valve becomes the injector. See
chapter 11 for details.
Two configuration parameters provide mechanical and electrical compatibility
with most multiposition valve actuators.
• Switching time, in seconds, is a delay between successive actuator move-
ments. It allows time for the actuator mechanism to prepare for the next
movement.
• Invert BCD complements the BCD input—1’s become 0’s and 0’s become
1’s. This accommodates coding convention differences among manufactur-
ers.
Time between valve steps
If
On, compliments BCD input
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