Elar controls & systems suppliesoffers series 3000 electronic potentiometric null balance circular chart recorders. Chart recordersthese are robust devices and give dust-proof protection to the circuitry inside. The servo drive is ic designed and small variation which provides produces instantaneous variation in the recording. These recorders come in three models - major, midi and mini are hree different models of chart recorders . Dual pen recorders are available in major and midi models. Also, digital scales are providedoffered in these models only. All chart recorders accept sensors, voltages and currents. Other parameters such as pressure, humidity and flow are through suitable transducers. Control actions are provided wwith powerless changeover contacts at output control actions are also provided. The digital readout provides gives instant reading while the recording is progress. Both analogue and digital circuits are independent of each other. The major models utilize 255 mm charts whilst midi and mini models utilize 155 mm charts. Continuous recording is done by disposable pens. It has a wide field of application mainly wwhere authenticated logging of process and batch process certification is mandatory, chart recorders are applied.
