CP-3800 GC Operator’s Manual
35
Oven power and cryogenics are entered in page 2.
ACTIVE
METHOD
EDIT
METHOD
CTRL
RUN
TIME
END
TIME
Method 1
Method 1
0.00
20.00
Set (°C): 50 Actual (°C): 50 Split Ratio: OFF
FRONT 1079, Page 2 of 3
1079 Oven Power
On
Coolant ON/OFF
On
Enable Coolant at (°C)
250
Coolant Time-out (min)
5
Default
Range
1079 Oven Power
Off
[On/Off]
Coolant ON/OFF
On
[On/Off]
Enable Coolant at (
°
C) 250
[30 - 450]
Coolant Time-out (min):
20
[0.00 - 999]
The coolant enable temperature is the temperature the coolant valve turns
on at when the zone is cooling down.
Coolant time-out is a safety device to save coolant after a specified time if
either (1) a zone fails to reach its set temperature or (2) it reaches the set
temperature and the GC does not go into run. The valve will be turned off if
the coolant time-out is reached, and no further coolant will be applied. A
value of zero disables the coolant time-out function.
A 1079 equipped with Electronic Flow Control includes a third page for
programming the split state and split ratio. If the split state is ON, then the
sample is split according to the split ratio specified. If the split state is OFF,
then the entire sample enters the column.
The example below is for a splitless injection. At the initial time (prior to run
start), the Split State is OFF indicating that when the sample is injected all
the sample vapor should enter the column. After 0.75 minutes, the split state
is switched to ON with a 100:1 split ratio.
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