User guide

Inlets 8
Advanced User Guide 199
Setting parameters for the splitless modes
Mode: The current operating mode—Splitless or Pulsed
splitless.
Tem pe ratur e Actual and setpoint inlet temperatures.
Initial time Hold time at the initial inlet temperature.
Rate # Temperature program rates for inlet thermal ramps.
Final temp # Final inlet temperature for ramp 1- 10.
Final time # Hold time at Final temp 1- 10.
Pressure Actual and setpoint inlet pressure in psi, bar, or kPa
Pulsed pres The inlet pressure you desire at the beginning of a
run. The pressure rises to this setpoint after [Prep Run] is
pressed and remains constant until Pulse time elapses, when it
returns to Pressure.
Pulse time Pressure returns to its normal setpoint at this time.
Purge time The time, after the beginning of the run, when you
want the split vent valve to open.
Table 35 Splitless mode inlet parameters
Parameter Allowed setpoint range Suggested starting
value
Oven temperature No cryo, ambient+4 °C to 450 °C
CO
2
cryo, –40 °C to 450 °C
N
2
cryo, –80 °C to 450 °C
10 °C below solvent
boiling point
Oven initial time 0 to 999.9 minutes ≥ Inlet purge time
Inlet purge time 0 to 200.0 minutes 2 x Liner volume
Column flow
Gas saver time 0 to 999.9 minutes After purge time
Gas saver flow 15 to 200 mL/min 15 mL/min greater
than maximum column
flow
Inlet temperature No cryo, oven temp + 10 °C
CO
2
cryo, –70 °C to 450 °C
N
2
cryo, –160 °C to 450 °C
10 °C below solvent
boiling point for 0.1min,
then ramp up