Design and Implementation of a Multifunctional Integrated Controller Module in Shared Development Platform of Portable Gas Chromatograph

Based on the design concept of a shared development platform, we developed a multi-functional all-in-one controller module, consisting of a programmable logical controller(PLC), a driver module, and a signal acquisition system. Our module can be integrated directly into portable gas chromatographs (GC). Through evaluation, it was confirmed that the chromatography temperature fluctuation was ≤±0.1℃. The fluctuation RSD of 60℃/min warming-up was < 0.15%. The temperature fluctuation in the sampler inlet and detector was ≤±0.1℃ and the RSD of qualitative and quantitative repeated deviation were 0.1% and 4.6% (peak height) respectively. The temperature and humidity range in which the device works were 0~40℃ and 95% respectively. The module successfully passed the tests of sine wave and XYZ direction vibration of 25.4 mm displacement, 1.5 g acceleration and 5~200~5 Hz frequency. The application of the module to 3 new types of analytical instruments achieved desirable results. The module meets the demand of on-site and field application and features versatility, sturdiness, small volume and low power consumption.