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User Manual MON20/20 Software for Gas Chromatographs
3-9000-745 SEPTEMBER 2010
3-14
3.2.4 Inverting the polarity of a valve
The Invert Polariy option reverses the effect of switching a valve on or
off. By default, the Invert Polarity option is set to FALSE, which means
that switching a valve to ON activates it, and switching the valve to OFF
deactivates it. Setting Invert Polarity to TRUE means that switching a
valve to ON deactivates it, and switching the valve to OFF activates it.
To set the polarity of a valve, do the following:
1. Select Valves... from the Hardware menu. The Valves window
displays.
Figure 3-11. The Valves window
2. If the Invert Polarity checkbox is selected, it is set to True; to set it to
False, uncheck the box by clicking it. If the Invert Polarity checkbox is
not selected, it is set to False; to set it to True, click the box.