GAS GC-IMS, User Manual

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GC-IMS
– User Manual
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6.4.2 Drift Voltage
The Drift Voltage can be switched between positive and negative drift voltage mode.
One of these two modes may be more suitable for specific substances.
Figure 29: Drift Voltage Windows - positive and negative Mode
6.4.3 Flow Controls and Heating Modules
Figure 30: Flow and Temperature Control (Example)
The component parameters are displayed and can be modified in the upper section of
the window and in the left section of the window.
Above the spectra chart the flow rates of the drift and carrier gas controlled by the two
electric pressure controllers (EPC 1 and EPC 2) and the temperatures of the heating
elements of the device are managed. Unused elements are greyed out. The current
flow rates and set-points for EPC 1 (drift gas) and EPC 2 (carrier gas) are displayed.
The maximum value for EPC 1 is 500 ml/min. The maximum value for EPC 2 is 150
ml/min (Depending on the column used). The current temperatures and the set points
of the IMS (T1), the column (T2), the 6-Port valve with sample loop (T3) and the inner
heated transferline (T5) are displayed. The set points can be set using these
controllers. The maximum adjustable temperature value is 80 °C. During the cleaning
process the heating modules can reach temperatures up to 100 °C. These will be
displayed as “> 80 °C”. Heating modules can be turned off by decreasing the respective
value to
“off”.