Configuration 10
Operation Manual 177
Valve #
Up to 4 valves can be mounted in a temperature- controlled
valve box and are normally wired to the valve box bracket
V1 through V4 plugs, located inside the electrical
compartment. Additional valves or other devices (4 through
8) can be wired using the plug labeled EVENT on the back of
the GC.
To con fi gu re a v al ve
1 Press [Config][Valve #] and enter the number (1 to 8) of
the valve you are configuring. The current valve type is
displayed.
2 To change the valve type, press [Mode/Type], select the
new valve type, and press [Enter].
Valve types
• Sampling Two- position (load and inject) valve. In load
position, an external sample stream flows through an
attached (gas sampling) or internal (liquid sampling) loop
and out to waste. In inject position, the filled sampling
loop is inserted into the carrier gas stream. When the
valve switches from Load to Inject, a run starts if one is
not already in progress. See the Advanced Operation
manual for details.
• Switching Two-position valve with four, six, or more
ports. These are general- purpose valves used for such
tasks as column selection, column isolation, and many
others. For an example of valve control, see the Advanced
Operation manual.
• Multiposition Also called a stream selection valve. It
selects one from a number of gas streams and feeds it to
a sampling valve. The actuator may be ratchet- (advances
the valve one position each time it is activated) or
motor- driven. An example that combines a stream
selection valve with a gas sampling valve is provided in
the Advanced Operation manual.
•Remote start Available selection when configuring valve
#7 or #8 only. Use this selection when wires controlling
an external device are attached to an internal pair of
contacts controlled by the GC.
• Other Something else.
• Not installed Self- explanatory.
To Next Page
Loading...
Need help?
General
