ChromeGate 3.3.2 Software Manual - KNAUER Advanced Scientific ...

90 Creating an Instrument Control Method
Pretreatment (not for Kontron pumps)
Checking this option the Setup… button becomes active. Clicking on it
the following dialog window will be opened:
Fig. 133 Pretreatment setting dialog window
The appearance of the pump program corresponds to that of the main
pump setup window. It must be edited in the same way as described
above. To add a new line, make a right mouse click into the table and
select “Insert line” from the menu. The only difference is that negative
times must be entered, because they are relative to the zero injection
time.
During a pretreatment, no data acquisition is possible. However, the run
status during a pretreatment is “Equilibrating”.
If a pretreatment is to define for more than one instrument (pump
and/or valve drive) in a method, it is required to set for all of them
the same earliest time. All pretreatment procedures will start
simultaneously.
If a pump should exactly switch off after 5 minutes of pretreatment,
include a line with 0 ml/min flow into the pretreatment’s pump
program. Otherwise the pump may run for a longer time as it need
some seconds to load the new flow rate from the method’s “normal”
pump program
An example for both :
A pump should run for exactly 5 minutes before the injection and a valve
should switch 2 minutes before injection from position 2 to position 5,
means, 3 minutes after the pump’s pretreatment is started. Here are the
setup tables create a time table for the valve, which starts with -5
minutes:
Pump
-5.04 min 1 ml/min
-0.04 min 1 ml/min
-0.02 min 0 ml/min (smallest time step is 0.06 minutes for pump 1800 /
P2.1L or 0.02 min for all other pumps)
0.00 min 0 ml/min
Valve
-5.04 min pos. 2
-2.00 min pos. 5
0.00 min pos. 5