{"product_id":"pool-link-500-series-optical-flow-switch-pi","title":"Pool Link 500 Series, Optical Flow Switch (PI)","description":"\u003cp data-path-to-node=\"0\" class=\"first-token\"\u003e\u003cspan class=\"\"\u003eThe \u003c\/span\u003e\u003cb data-path-to-node=\"0\" data-index-in-node=\"4\"\u003ePool Link 500 Series Optical Flow Switch (PI)\u003c\/b\u003e\u003cspan\u003e (Pool Link \/ Link Automation) is a solid-state,\u003c\/span\u003e\u003cspan\u003e non-invasive electro-optical safety interlock engineered for the Pool Link 500 and 501 Series commercial water chemistry automation systems.\u003c\/span\u003e\u003cspan\u003e Incorporating an industrial photo-interrupter (PI) or infrared\/visible optoelectronic detection module,\u003c\/span\u003e\u003cspan\u003e it monitors sample bypass velocity without placing mechanical paddles,\u003c\/span\u003e\u003cspan\u003e shuttles,\u003c\/span\u003e\u003cspan\u003e or delicate bearings in direct contact with the flowing water.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"1\"\u003e\u003cspan\u003eActing as the system's primary safety interlock,\u003c\/span\u003e\u003cspan\u003e it verifies water circulation across analytical probes and immediately commands the controller to de-energize chemical feed outputs (liquid chlorine feeders,\u003c\/span\u003e\u003cspan\u003e acid metering pumps,\u003c\/span\u003e\u003cspan\u003e and \u003c\/span\u003e\u003cspan class=\"math-inline\" data-math=\"CO_2\" data-index-in-node=\"232\"\u003e$CO_2$\u003c\/span\u003e\u003cspan\u003e solenoids) if the bypass flow stalls or drops below the critical threshold.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"3\"\u003eHardware Architecture \u0026amp; Optoelectronic Dynamics\u003c\/h3\u003e\n\u003cp data-path-to-node=\"4\"\u003e\u003cspan\u003eDesigned to eliminate the mechanical binding,\u003c\/span\u003e\u003cspan\u003e scaling,\u003c\/span\u003e\u003cspan\u003e and pin wear common to wet-contact switches in high-bather commercial natatoriums and waterparks:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"5\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,0,0\"\u003e\u003cb data-path-to-node=\"5,0,0\" data-index-in-node=\"0\"\u003eNon-Invasive Optical Detection:\u003c\/b\u003e\u003cspan\u003e Utilizes an integrated infrared (IR) LED emitter paired with a matched phototransistor receiver positioned on opposite sides of a clear optical sight-tube or machined acrylic flow channel.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,1,0\"\u003e\u003cb data-path-to-node=\"5,1,0\" data-index-in-node=\"0\"\u003eOptical Sensing Mechanisms (Model-Dependent):\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"5,1,1\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,1,1,0,0\"\u003e\u003ci data-path-to-node=\"5,1,1,0,0\" data-index-in-node=\"0\"\u003eRefractive Stream Detection:\u003c\/i\u003e\u003cspan\u003e Senses the change in light refraction index between an air-filled dry tube and a full,\u003c\/span\u003e\u003cspan\u003e laminar water stream.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,1,1,1,0\"\u003e\u003ci data-path-to-node=\"5,1,1,1,0\" data-index-in-node=\"0\"\u003eFloating Optical Target \/ Flag:\u003c\/i\u003e\u003cspan\u003e Monitors an internal,\u003c\/span\u003e\u003cspan\u003e free-floating high-contrast opaque polymer bead or disk suspended in the clear vertical barrel.\u003c\/span\u003e\u003cspan\u003e Dynamic water velocity elevates the target past the IR beam; loss of flow allows the target to settle below the optical axis,\u003c\/span\u003e\u003cspan\u003e breaking the beam.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,2,0\"\u003e\u003cb data-path-to-node=\"5,2,0\" data-index-in-node=\"0\"\u003eFouling-Resistant Solid-State Operation:\u003c\/b\u003e\u003cspan\u003e Eliminates rotating shafts,\u003c\/span\u003e\u003cspan\u003e mechanical pivots,\u003c\/span\u003e\u003cspan\u003e and spring assemblies that easily jam from hair,\u003c\/span\u003e\u003cspan\u003e lint,\u003c\/span\u003e\u003cspan\u003e suspended body oils,\u003c\/span\u003e\u003cspan\u003e or calcium carbonate scale in commercial pools.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,3,0\"\u003e\u003cb data-path-to-node=\"5,3,0\" data-index-in-node=\"0\"\u003eIntegrated Signal Conditioning:\u003c\/b\u003e\u003cspan\u003e Features an encapsulated miniature PCB containing threshold comparators and an output driver (open-collector or miniature dry-contact relay) that filters out optical flicker,\u003c\/span\u003e\u003cspan\u003e air-bubble noise,\u003c\/span\u003e\u003cspan\u003e and ambient light interference.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"5,4,0\"\u003e\u003cb data-path-to-node=\"5,4,0\" data-index-in-node=\"0\"\u003eLocal Visual Status Indicator:\u003c\/b\u003e\u003cspan\u003e Outfitted with an external bi-color or solid status LED on the sensor housing (typically \u003c\/span\u003e\u003cb data-path-to-node=\"5,4,0\" data-index-in-node=\"120\"\u003eGreen = Flow Active \/ Interlock Closed\u003c\/b\u003e\u003cspan\u003e,\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cb data-path-to-node=\"5,4,0\" data-index-in-node=\"160\"\u003eRed\/Dark = No Flow \/ Locked Out\u003c\/b\u003e\u003cspan\u003e),\u003c\/span\u003e\u003cspan\u003e allowing instant verification during equipment room rounds.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"7\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\"\u003e\u003cb data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003eCompatible Controllers:\u003c\/b\u003e\u003cspan\u003e Pool Link 501,\u003c\/span\u003e\u003cspan\u003e Pool Link 500 Series,\u003c\/span\u003e\u003cspan\u003e and Link Automation commercial controllers with active dry-contact or low-voltage DC flow interlock inputs.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cb data-path-to-node=\"8,1,0\" data-index-in-node=\"0\"\u003eOutput Configuration:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"8,1,1\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,1,0,0\"\u003e\u003cspan\u003eIsolated SPST dry contact (Normally Open - NO,\u003c\/span\u003e\u003cspan\u003e closes upon verified flow).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,1,1,0\"\u003e\u003cspan\u003eRated for low-voltage signal circuits:\u003c\/span\u003e\u003cspan\u003e Max \u003c\/span\u003e\u003cb data-path-to-node=\"8,1,1,1,0\" data-index-in-node=\"43\"\u003e24V AC\/DC, 0.5A\u003c\/b\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,2,0\"\u003e\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003eOperating Power Requirement:\u003c\/b\u003e\u003cspan\u003e 5V to 24V DC auxiliary input supplied directly by the Pool Link 501 mainboard accessory header.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,3,0\"\u003e\u003cb data-path-to-node=\"8,3,0\" data-index-in-node=\"0\"\u003eHydraulic Actuation Limits:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"8,3,1\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,3,1,0,0\"\u003e\u003cb data-path-to-node=\"8,3,1,0,0\" data-index-in-node=\"0\"\u003eCut-In (Flow OK):\u003c\/b\u003e\u003cspan\u003e Typically \u003c\/span\u003e\u003cb data-path-to-node=\"8,3,1,0,0\" data-index-in-node=\"28\"\u003e0.35 to 0.50 GPM\u003c\/b\u003e\u003cspan\u003e (approx.\u003c\/span\u003e\u003cspan\u003e 1.\u003c\/span\u003e\u003cspan\u003e3 to 1.\u003c\/span\u003e\u003cspan\u003e9 LPM).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,3,1,1,0\"\u003e\u003cb data-path-to-node=\"8,3,1,1,0\" data-index-in-node=\"0\"\u003eCut-Out (No Flow):\u003c\/b\u003e\u003cspan\u003e Drops out below \u003c\/span\u003e\u003cb data-path-to-node=\"8,3,1,1,0\" data-index-in-node=\"35\"\u003e0.25 to 0.30 GPM\u003c\/b\u003e\u003cspan\u003e (approx.\u003c\/span\u003e\u003cspan\u003e 0.\u003c\/span\u003e\u003cspan\u003e95 to 1.\u003c\/span\u003e\u003cspan\u003e1 LPM).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,4,0\"\u003e\u003cb data-path-to-node=\"8,4,0\" data-index-in-node=\"0\"\u003eMaximum Working Pressure:\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003e\u003cb data-path-to-node=\"8,4,0\" data-index-in-node=\"26\"\u003e50 PSI\u003c\/b\u003e\u003cspan\u003e (approx.\u003c\/span\u003e\u003cspan\u003e 3.\u003c\/span\u003e\u003cspan\u003e45 bar) within standard cast acrylic bypass flow cells.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,5,0\"\u003e\u003cb data-path-to-node=\"8,5,0\" data-index-in-node=\"0\"\u003eOperating Water Temperature:\u003c\/b\u003e\u003cspan\u003e 32°F to 120°F (0°C to 49°C).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,6,0\"\u003e\u003cb data-path-to-node=\"8,6,0\" data-index-in-node=\"0\"\u003eProcess Fitting:\u003c\/b\u003e\u003cspan\u003e Integrated directly into the Pool Link 500 Series acrylic sight barrel or plumbed inline via standard 1\/4\" NPT or 1\/2\" NPT compression adapters.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,7,0\"\u003e\u003cb data-path-to-node=\"8,7,0\" data-index-in-node=\"0\"\u003eWiring Interface:\u003c\/b\u003e\u003cspan\u003e Standard \u003c\/span\u003e\u003cb data-path-to-node=\"8,7,0\" data-index-in-node=\"27\"\u003e10-foot\u003c\/b\u003e\u003cspan\u003e (approx.\u003c\/span\u003e\u003cspan\u003e 3.\u003c\/span\u003e\u003cspan\u003e0 m) factory-jacketed 3-wire or 4-wire shielded instrumentation cable (Power,\u003c\/span\u003e\u003cspan\u003e Common\/Ground,\u003c\/span\u003e\u003cspan\u003e Signal\/Switch).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"10\"\u003eMaintenance, Cleaning \u0026amp; Alignment Protocols\u003c\/h3\u003e\n\u003cul data-path-to-node=\"11\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,0,0\"\u003e\u003cb data-path-to-node=\"11,0,0\" data-index-in-node=\"0\"\u003eOptical Barrel Scaling:\u003c\/b\u003e\u003cspan\u003e Over time,\u003c\/span\u003e\u003cspan\u003e high total dissolved solids (TDS) or elevated calcium hardness can form a hazy carbonate film on the inside walls of the clear sight tube,\u003c\/span\u003e\u003cspan\u003e attenuating the IR beam and triggering false \"NO FLOW\" alarms.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,1,0\"\u003e\u003cb data-path-to-node=\"11,1,0\" data-index-in-node=\"0\"\u003eRoutine Descaling:\u003c\/b\u003e\u003cspan\u003e Isolate the bypass loop using the inlet\/outlet petcocks.\u003c\/span\u003e\u003cspan\u003e Unthread the optical barrel assembly and soak the clear tube in a 5% to 10% muriatic acid solution or white vinegar for 5 to 10 minutes to dissolve mineral clouding.\u003c\/span\u003e\u003cspan\u003e Rinse with fresh water; do not use abrasive pads on the optical acrylic.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,2,0\"\u003e\u003cb data-path-to-node=\"11,2,0\" data-index-in-node=\"0\"\u003eShielding from Ambient Light:\u003c\/b\u003e\u003cspan\u003e While filtered for infrared frequencies,\u003c\/span\u003e\u003cspan\u003e avoid pointing high-intensity halogen or unshielded UV work lights directly at the sensor's optical barrel during equipment room maintenance,\u003c\/span\u003e\u003cspan\u003e as strong external light can occasionally saturate the phototransistor.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"attachment-container unknown md-has-block-component\"\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003csequence class=\"lm-enabled ng-star-inserted\"\u003e\u003cdiv role=\"list\" class=\"sequence-container\" jslog=\"308913;track:impression,attention\" data-hveid=\"0\" decode-data-ved=\"1\" data-ved=\"0CAAQse0SahgKEwjHxM7M582XAxUAAAAAHQAAAAAQhgU\"\u003e\n\u003cdiv role=\"listitem\" class=\"sequence-event ng-star-inserted\"\u003e\u003cdiv class=\"sequence-event-content\"\u003e\u003cdiv class=\"sequence-event-description gds-body-l\"\u003e\n\u003cspan only-show-to-message-actions=\"\" data-test-id=\"sequence-export-header\" class=\"only-show-to-message-actions\"\u003e\u003cstrong\u003e\u003c!----\u003e\u003c!----\u003e1.\u003c!----\u003e\u003c!----\u003eDe-energize Controller and Isolate Flow:\u003c!----\u003e\u003c\/strong\u003eSafety Prerequisite.\u003c!----\u003e\u003c!----\u003e\u003c\/span\u003e\u003cstructured-node-sequence _nghost-ng-c1241692568=\"\" class=\"ng-star-inserted\"\u003e\u003cstructured-text _ngcontent-ng-c1241692568=\"\" class=\"ng-star-inserted\"\u003e\u003c!----\u003e\u003c!----\u003e\u003cp class=\"ng-star-inserted\"\u003eDisconnect main AC power to the legacy 1000 Series controller enclosure. Close the bypass supply and return isolation valves to relieve hydraulic pressure in the probe manifold.\u003c\/p\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003ci\u003eVerification:\u003c\/i\u003e Pressure gauge on the manifold reads 0 PSI and the controller display is unpowered.\u003c\/p\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c\/structured-text\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/structured-node-sequence\u003e\u003c!----\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv role=\"listitem\" class=\"sequence-event ng-star-inserted\"\u003e\u003cdiv class=\"sequence-event-content\"\u003e\u003cdiv class=\"sequence-event-description gds-body-l\"\u003e\n\u003cspan only-show-to-message-actions=\"\" data-test-id=\"sequence-export-header\" class=\"only-show-to-message-actions\"\u003e\u003cstrong\u003e\u003c!----\u003e\u003c!----\u003e2.\u003c!----\u003e\u003c!----\u003eRemove the Existing Temperature Sensor:\u003c!----\u003e\u003c\/strong\u003e5 min.\u003c!----\u003e\u003c!----\u003e\u003c\/span\u003e\u003cstructured-node-sequence _nghost-ng-c1241692568=\"\" class=\"ng-star-inserted\"\u003e\u003cstructured-text _ngcontent-ng-c1241692568=\"\" class=\"ng-star-inserted\"\u003e\u003c!----\u003e\u003c!----\u003e\u003cp class=\"ng-star-inserted\"\u003eDisconnect the two temperature sensor wires from the controller's mainboard terminal strip (noting polarity\/terminal designations). Unscrew the sensor probe from the acrylic manifold port counter-clockwise using an open-end wrench.\u003c\/p\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003ci\u003eVerification:\u003c\/i\u003e Port threads are clean and free of remnants from old Teflon tape or cracked plastic.\u003c\/p\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c\/structured-text\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/structured-node-sequence\u003e\u003c!----\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv role=\"listitem\" class=\"sequence-event ng-star-inserted\"\u003e\u003cdiv class=\"sequence-event-content\"\u003e\u003cdiv class=\"sequence-event-description gds-body-l\"\u003e\n\u003cspan only-show-to-message-actions=\"\" data-test-id=\"sequence-export-header\" class=\"only-show-to-message-actions\"\u003e\u003cstrong\u003e\u003c!----\u003e\u003c!----\u003e3.\u003c!----\u003e\u003c!----\u003eInstall and Wire Replacement Probe:\u003c!----\u003e\u003c\/strong\u003e5 min.\u003c!----\u003e\u003c!----\u003e\u003c\/span\u003e\u003cstructured-node-sequence _nghost-ng-c1241692568=\"\" class=\"ng-star-inserted\"\u003e\u003cstructured-text _ngcontent-ng-c1241692568=\"\" class=\"ng-star-inserted\"\u003e\u003c!----\u003e\u003c!----\u003e\u003cp class=\"ng-star-inserted\"\u003eApply 2 to 3 wraps of PTFE thread sealing tape to the new sensor's male NPT threads. Hand-tighten into the flow cell port and snug an additional 1 turn with a wrench. Route the cable into the low-voltage knock-out and secure the leads into the temperature terminals.\u003c\/p\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003ci\u003eVerification:\u003c\/i\u003e Sensor is seated firmly without leaking under line pressure, and wire terminals are clamped tight.\u003c\/p\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c\/structured-text\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/structured-node-sequence\u003e\u003c!----\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003cdiv role=\"listitem\" class=\"sequence-event ng-star-inserted\"\u003e\u003cdiv class=\"sequence-event-content\"\u003e\u003cdiv class=\"sequence-event-description gds-body-l\"\u003e\n\u003cspan only-show-to-message-actions=\"\" data-test-id=\"sequence-export-header\" class=\"only-show-to-message-actions\"\u003e\u003cstrong\u003e\u003c!----\u003e\u003c!----\u003e4.\u003c!----\u003e\u003c!----\u003ePower Up and Calibrate:\u003c!----\u003e\u003c\/strong\u003e3 min.\u003c!----\u003e\u003c!----\u003e\u003c\/span\u003e\u003cstructured-node-sequence _nghost-ng-c1241692568=\"\" class=\"ng-star-inserted\"\u003e\u003cstructured-text _ngcontent-ng-c1241692568=\"\" class=\"ng-star-inserted\"\u003e\u003c!----\u003e\u003c!----\u003e\u003cp class=\"ng-star-inserted\"\u003eRestore AC power to the controller and open bypass isolation valves. Compare the controller's displayed water temperature against an independent calibrated handheld thermometer or photometer reading taken at the petcock.\u003c\/p\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003ci\u003eVerification:\u003c\/i\u003e Displayed temperature stabilizes and tracks within \u003cspan class=\"math-inline\" data-math=\"\\pm 1^\\circ\\text{F}\" data-index-in-node=\"286\"\u003e$\\pm 1^\\circ\\text{F}$\u003c\/span\u003e of the reference thermometer.\u003c\/p\u003e\u003c\/structured-text\u003e\u003c\/structured-node-sequence\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/sequence\u003e\n\u003c\/div\u003e","brand":"Commercial Pool and Spa Supplies","offers":[{"title":"Default Title","offer_id":67968929169519,"sku":"LINK-OPFS","price":1099.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/3785\/3807\/files\/mermade-filter-500-series-automatic-chemical-feed-controller-by-pool-link-474-474_d4279122-6b2c-41b3-b454-449be02908c2.jpg?v=1792681416","url":"https:\/\/commercialpoolandspasupplies.com\/products\/pool-link-500-series-optical-flow-switch-pi","provider":"Commercial Pool and Spa Supplies ","version":"1.0","type":"link"}