Agilent Technologies 7890 Series - Temperature Never Becomes Ready

94 Agilent 7890 Series Troubleshooting
4 GC Not Ready Symptoms
Temperature Never Becomes Ready
To be considered ready, a temperature must be at setpoint ±1 °C
for 30 s. If a temperature never becomes ready, do the following:
• Check for a missing insulation cup on an inlet or detector.
• Check for a very large temperature difference between the
oven and inlet or detector.
• Check for missing insulation around the inlet or detector.
• If using an inlet cryo cooling (COC, PTV, or MMI):
• Check cryo coolant level.
• Check if operating limits have been exceeded. If, for
example, you are operating the GC in a hot room at a high
oven temperature and a very low inlet temperature, an
inlet may not reach its desired temperature.