38
03-914648-00:7
Type 1 EFC
Type 1 EFC, used with the either the CP-1177 or 1079 injector, allows you to
maintain a constant pressure or to build a pressure program to maintain
constant column flow while temperature programming the column oven.
An example of a Type 1 EFC method is shown below. The status field
displays the column head pressure (in the units chosen in Setup), calculated
column flow rate, calculated column linear velocity, total flow and split ratio
status. Total flow represents the column flow septum purge flow and the split
vent flow. The split ratio status is either off if the split state is set to OFF, or a
whole number. Additionally, the table below is a typical pressure program
used in conjunction with a column oven temperature program to maintain
constant flow.
ACTIVE
METHOD
EDIT
METHOD
CTRL
RUN
TIME
END
TIME
Method 1
Method 1
0.00
20.00
Col Press (psi): 10.0
Col Flow (mL/min): 2.0
Linear Vel. (cm/sec): 3.5
Total Flow (mL/min): 50
Split Ratio: Off
FRONT EFC Type 1 Page 1 of 2
Step
Pres (psi)
Rate (psi/min) Hold (min)
Total (min)
Initial
10.0
-
0.75
0.75
1
20.0
2.00
2.00
5.75
2
35.0
5.00
5.25
14.00
Constant Flow Programming
The second page of the TYPE 1 EFC allows constant flow mode to be
selected. Selecting Constant Flow will allow you to set a Pressure Pulse
program accessed via the Pressure Pulse softkey that will be displayed once
you have selected Constant Flow. When Constant Flow Programming is
enabled, a pressure program based on the column parameters and the
column oven temperature program will be built whenever the method is
activated. If the desired column flow, or the column oven temperature
program is changed, the method must be reactivated to derive a new
pressure program for these new conditions.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
