Hanna Instruments PCA310 Instruction Manual

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Hanna Instruments PCA310 Instruction Manual Manual pdf 17 page image

17SPECIFICATIONSDrain connection 10 mm (3/8”) barbProcess pH/temp probe HI1005Process ORP probe HI2008Power supply 115 VAC ± 10% or 230 VAC ± 10%;50-60 Hz; 20 VACase NEMA-4XCHLORINE MEASUREMENTReferring to the drawing on page 11 and the Fluidic Diagram on page 18, the Sample Line isconnected to the instrument at the Sample Port (#17); an internal Regulator (#14) reduces theinlet pressure from a maximum of 4 bar (57.2 psi) down to 1 bar (14.3 psi); from the Regulator anylon tube is connected to the input of the Electrovalve (#21). The output of the valve goes to theDrain Port (#11) and then to the Measuring Cell (#8). An optional Filter can be installed to thesample port if the stream is excessively turbid.The sample coming from the line normally flows through the Measuring Cell (#8). It goes out fromthe Measuring Cell through the Drain Tube (#9) and the Output Port (#10).The Measuring Cell is accessible from the port placed on the top (#7) for speedy cleaning andmaintenance.During the 100 seconds preceding the sampling, the analyzer solenoid input valve is open to allowsample flow to flush the colorimeter cell. Every 3 to 90 minutes (user selectable), the electrovalvecloses stopping the sample flow and leaving the sample cell full of fresh sample. Cell volume iscontrolled by an overflow gateway.As the sample inlet electrovalve closes, a series of measurements (with LED on and off) of the unreactedsample is taken to determine an average blank level prior to reagent addition.The measurement of sample blank signal permits compensation for any turbidity or natural color, andprovides the zero reference point for the measurement.The two channel Peristaltic Pump (#5) starts rotating causing a precise quantity of buffer and indicator(#15 and #16) to enter the colorimeter sample cell. Here a magnetically coupled stirrer mixes thereagents with the sample.OPERATING DESCRIPTION