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Part 1. Not Ready messages Messages
Pressure and/or flow not ready
all the zones are within ± 1°C of the setpoint and have maintained the setpoint
temperature for 30 seconds. A zone that is turned off is considered ready.
If a temperature zone is unable to reach the setpoint, the GC remains not ready
indefinitely. The GC does not shut down unless a temperature is out of the range
for the zone.
Pressure and/or flow not ready
The GC will not start a run until all pressurized areas have reached their setpoints
and maintained them for 6 seconds. The acceptable pressure range of an area
is between 0.05 and 0.5 psi, depending on its sensor type.
Likewise, the GC is not ready to begin a run until flows are within 1 mL/min of
the setpoint and remain in the range for 6 seconds. Pressure zones that are turned
off are considered ready.
If the zone does not become ready within a specified time, the GC goes into
shutdown mode. See the Shutdown messages for more information.
When a pressure or flow cannot become ready, check that the gas supply is on
and has enough gas.
Detector not ready
Front det waiting
Back det waiting
To prevent condensation, FID and NPD temperatures must be at least 150°C
before they can ignite. The FPD must be at 120°C or higher before it can ignite.
The TCD must be at 100°C or higher before the filament current turns on. If
temperatures are below the minimum, the GC is not ready.
If a detector is unable to reach its minimum temperature, the GC remains not
ready indefinitely.
• Verify that the detector temperature setpoint is high enough for operation.
Raise it if it is too low.
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