4040 - Methane / Nonmethane analyzer - Teledyne Analytical ...

Installation3.3.4 RS-232 PortThe digital signal output is a standard RS-232 serial communicationsport used to connect the analyzer to a computer, terminal, or other digitaldevice. It requires a standard 9-pin D connector.Input: The input functions using RS-232 that have been implementedto date are described in Table 3-7.Table 3-8: Commands via RS-232 InputCommandASALRLRMRHRADescriptionImmediately starts an autospan.Immediately revert to Analyze (CH4 Mode)Change to Manual Range LOWChange to Manual Range MEDIUMChange to Manual Range HIGHChange to Manual Range AUTOImplementation: The RS-232 protocol allows some flexibility in itsimplementation. Table 3-9 lists certain RS-232 values that are requiredby the Model 4020 implementation.Table 3-9: Required RS-232 OptionsParameter SettingBaud 2400Byte 8 bitsParity noneStop Bits 1Message Interval Sent at the end of each cycle.3.3.5 Supporting GasesNormally, four supporting gases of different composition (seeSection 4.1: Equipment) will be required to operate the analyzer. Therecommended composition of these gases is specified in the ApplicationData section of the Appendix. The gases should be supplied fromcylinders that are equipped with the type of regulator specified in theaforementioned sections.Teledyne Analytical Instruments 35