{"id":3006,"date":"2024-02-28T12:16:19","date_gmt":"2024-02-28T18:16:19","guid":{"rendered":"https:\/\/scadametrics.com\/blog\/?p=3006"},"modified":"2025-01-28T23:43:52","modified_gmt":"2025-01-29T05:43:52","slug":"chemical-flow-pacing-with-the-signalizer","status":"publish","type":"post","link":"https:\/\/scadametrics.com\/blog\/?p=3006","title":{"rendered":"Chemical Flow Pacing with SCADAmetrics Instrumentation"},"content":{"rendered":"
\"James

Jim ‘Slim’ Mimlitz, SCADAmetrics<\/p><\/div>\n\n\n\n

At many pumping stations, production wells, filtration plants, and custody transfer stations, it is often desired to add chemicals (such as hypochlorite, for example) to the water flow.<\/p>\n\n\n\n

Whenever chemicals are pumped into a pipeline, it is important for the utility to ensure that the chemical flow is a fixed proportion<\/em><\/strong> of the pipeline flow. Thereby, when the pipeline flow varies up and down, then the speed of the chemical metering pump will be varied up and down to match, accordingly.<\/p>\n\n\n\n

\"\"
An Example Chemical Metering Pump<\/strong><\/figcaption><\/figure>\n\n\n\n

Signalizer Solution \u2014 Converts Encoder Meter to 4-20mA<\/h2>\n\n\n\n

The pipeline flow can be monitored with an inline flow meter with a high-resolution encoded output, such as the Neptune HP Turbine with ProCoder register. In order to generate the required analog flow pacing signal, a SCADAmetrics model EMP Signalizer<\/a><\/strong> will leverage the encoded signal from the ProCoder to create a fast-reacting (1 second) 4-20mA signal. Note that this solution requires an encoder-type flow meter\/register that can tolerate high-frequency interrogations (i.e. every 1-5 seconds):<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

Analog\/Pulse Kit Solution \u2014 Converts Pulse Meter to 4-20mA<\/h2>\n\n\n\n

Alternatively, if the inline flow meter is not an encoder-type, but rather a high-resolution pulse-output type, then a SCADAmetrics model APK Analog\/Pulse Kit<\/a><\/strong> may be used to generate the required 4-20mA chemical pacing signal:<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n
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Regardless of whether the chemical feed is controlled by a Signalizer (w\/ Encoder-type flow meter) or an Analog\/Pulse Kit (w\/ Pulse-type flow meter) \u2014 a modular control architecture is achieved, providing the customer with the following benefits:<\/p>\n\n\n\n