ChromeGate 3.3.2 Software Manual - KNAUER Advanced Scientific ...

Creating an Instrument Control Method 105
Instrument Setup – Virtual Detector
A virtual detector is not a real instrument but a software tool having
special functions. For instance, it is possible to carry out simulations or
corrections of chromatograms with this “detector”. The result will be
stored as normally created chromatogram.
The virtual detector requires the same general settings as any other
detector as described on page 91 (left-hand side of the setup window).
They have to been set also for the virtual detector.
Fig. 155 Virtual detector setup window
Ext. Trigger On in 0.00 Min after ready
Check this option to use a logical “trigger signal” for starting the system.
This allows a synchronous system start also without an external trigger
source (e.g. autosampler or manual injection valve). With “0.00 Min” the
system will be started if all connected devices have sent a “ready” to the
software. For a delayed start, enter the desired time.
Argument X / Y
X and Y are optional arguments; use of these can be switched off. A
result formula can be calculated without either X nor Y, with only X or with
both X and Y (single Y is forbidden). If using X or Y is switched on, "X"
and "Y" signs must be used in the result formula expression.
After checking this field, the pull-down menu of the Source becomes
accessible. The options are Time, Data File and External Source.
Time
With this selection no further settings for Argument X are possible. The
argument value is equal to the current time value.
Data File
Load an already existing chromatogram (data file) that should be shown
starting a run with the virtual detector. The value of this argument is
calculated using the corresponding point in the selected data file. The
“speed” of the data “acquisition” can be set with the sampling rate. If the
original chromatogram was acquired for 10 min with 1 Hz, the
chromatogram will be finished within 5 min if the sampling rate for the
virtual detector is set to 2 Hz. If no data points left of the original
chromatogram, the virtual detector will show a value of 0 (“zero”).
The Settings button will become accessible and clicking on it will bring up
the following dialog box: