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The concentration of residual chlorine/total chlorine was detected using the DPD colour method. Reagent usage for 30 days of continuous operation to achieve unmanned operation and low operating maintenance costs. (a) The automatic cleaning function, which reduces the amount of maintenance; ◎ Output: 4–20 mA (load <5002, as stated in the source); RS485 communication (a) Have data storage functions; A reagent residual alarm function; Measurement model: Continuous measurement model, periodic measurement model (measurement cycle adjustable). A built-in real-time clock provides a time frame for the various functions; (a) Equalizing background light: can also be clearly observed and operated under dizziness; ◎ User-friendly interface with Chinese-language display, menus and event logs; Easy operation: the operational step is the full Chinese guide, and the menu keyboard drives every function.
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