Agilent Technologies 7890A Troubleshooting Manual page 64

4
GC Not Ready Symptoms
Temperature Never Becomes Ready
64
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 a cool on- column with CryoBlast or a PTV or
MMI inlet:
• Check cryo coolant level.
• Check if operating limits have been exceeded.
Troubleshooting