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The Model 202 Chromatography Data System consists of PeakSimple for Windows/Windows 95 software plus a four channel 23 bit high resolution A/D board. The 202 system can be mounted inside the Model 8610C or 310 GC, or it can be mounted in a separate box for connection to other vendor's GC or HPLC detectors. When mounted in an SRI GC, the 202 controls the temperature program of the column oven and the pressure program of the carrier gas electronic pressure controller ( EPC ). The eight available TTL outputs are connected internally within the GC to control functions such as valve rotations, gas solenoid actuation, autosampler injection, etc. When mounted in a separate box, the temperature and pressure control outputs are available for use but not connected to anything, and the eight TTL outputs are wired to a bank of eight single-pole, dual-throw mechanical relays with screw terminals for easy connection to any user device which operates from a contact closure. Two remote start inputs allow run initiation from the user's GC or HPLC system. In addition, two optional AC outlets permit 110/220 volt devices ( line powered solenoid valves, vacuum pumps, lights etc. ) to be powered on/off under PeakSimple software control. The four channels of data can be randomly assigned to one of two time bases which allows independent start and stop times for two entirely separate instruments. Data can be acquired at rates up to 50 Hz with one channel active, 10 Hz for two channels, or 5 Hz with all four channels activated and acquiring data. Windows 95 computers with two available serial ports ( bus mouse installed ) can operate dual 202 systems for a total of eight data channels and four timebases from a single PC platform.
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