• RUN – indicates that method is being run.
• FAULT – indicates that the system is the error state and requires rebooting.
3.4 Rear Panel
The rear panel (Figure 3.3) provides gas and electrical connections for inlet, host GC, autosampler,
optional auxiliary equipment, PC, and mains power. The mains power inlet is integrated with the
mains fuses.
The "Carrier In" coupling is used to connect the unit to the carrier gas supply. The "Inlet Gas Lines"
ports provide connections to the Carrier, Split, and Septum Purge gas lines of the inlet.
The “Exhaust” and “SP Exhaust” couplings are the exhaust outlets from the gas control system and
should be left open. Alternatively, the exhaust flows can be ducted to an extraction system, but this
should not restrict the flow.
The “Filter” couplings are used to connect the split line filter.
The "Aux In" and "Aux Out" couplings on the OPTIC-4-D and OPTIC-4-DC are used for the second
(auxiliary) gas channel. This channel can be used, for example, for the inlet backflush flow control.
The "Air In" coupling is connected to the cooling air supply for the inlet. The "To Inlet" coupling is
connected to the cooling pipe of the inlet, using the PTFE tubing supplied.
The "Inlet TC" and “Inlet Heater” connections are used to connect the control unit to the inlet. The
“C. Valve” connection is used to connect the inlet cooling valve.
The “GC TC” connection is for the thermocouple (supplied with OPTIC-4) used to measure the GC
oven temperature.
Fused Mains power inlet is located in the right lower corner of the rear panel. Next to it, there is a
safety earth terminal used to connect the external equipment including the OPTIC inlet to the
system safety earth.
The OPTIC-4 control unit communicates with the PC running the control software using either a USB
or LAN (Ethernet) connection, as selected in the Configuration Menu accessed from the control
software (see chapter 5 “Software Installation and Configuration”).
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