Flow and Pressure Control - UMass Amherst

623 Flow and Pressure ControlHydrogen shutdownColumn shutdownTurning gas flows on and offEPC-controlled streamsNonEPC-controlled streamsElectronic Pneumatic Control (EPC)Interpreting flow and Pressure readingsConfigurationColumns and inletsConfigure the columnProcedure: Configuring a capillarycolumnAdditional notes on columnconfigurationConfigure the carrier gasProcedure: Configuring the carrier gasSelect a column modeThe flow modesThe Pressure modesProcedure: Selecting a column modeEnter the initial flow or Pressure oraverage linear velocityProcedure: Setting initial flow orpressure or average linear velocityEnter a flow or Pressure program(optional)Procedure: Programming column Pressure or flowEnter the rest of the inlet parametersProcedure: Setting the rest of the inlet parametersDetectorsGas configurationMakeup gasAuxiliary channelsProcedure: Changing an auxiliary channel fritMaintaining EPC calibrationFlow sensorsPressure sensorsZero conditionsProcedure: Zeroing flow and pres-sure sensorsNonEPC controlInletsSeptum purge63 Flow and Pressure ControlMeasuring flow ratesMeasuring flow rates with a bubble meterWhere to measure flowsAdapters for measuring flow ratesProcedure: Measuring gas flows with

Electronic Pneumatic Control (EPC) Flow and Pressure Control Interpreting flow and pressure readings Electronic Pneumatic Control (EPC) The GC can electronically control all the gas flows and pressures in the instrument. It provides: • Flow and/or pressure control for all inlets, including flow and pressure

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  Electronic, Flows

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