86 Operation Manual
4 Operating in Chemical Ionization (CI) Mode
To Operate the Reagent Gas Flow Control Module
2 Use the parameters in the CI Reagent Gas Control area to
control reagent gas flow.
CI Reagent - Selects the reagent gas from the dropdown menu.
CI Gas Flow - Enter percent of maximum volumetric flow for
the selected reagent gas. The actual % transmitted by the flow
controller is shown next to this entry. 20% is a good value for
PCI and 40% is a good value for NCI.
Set button - Opens the selected reagent gas supply valve and
controls the reagent gas flow to the entered setpoint.
Off button - Turns off the reagent gas flow.
Purge button - Opens the selected reagent gas valve for 6
minutes to clear the system of unwanted compounds.
Pumpout button - Closes the reagent gas valve for 4 minutes
and evacuates the system of reagent gases. At the end of the
pumpout time the selected reagent gas valve opens.
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