Pool Systems Automation: Difference between revisions
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→Filter Tank Pressure
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==== Filter Tank Pressure ==== | ==== Filter Tank Pressure ==== | ||
Four [[Pool Filter Tanks|filter tank]] pressures are monitored by sensors with internal signal conditioning. When fed by a 24 VDC (each sensor is independently fused), a 1 V to 5 V output corresponds with 0 to 100 psi of pressure. | Four [[Pool Filter Tanks|filter tank]] pressures are monitored by [[Pool Systems Automation#Sensors|sensors]] with internal signal conditioning. When fed by a 24 VDC (each sensor is independently fused), a 1 V to 5 V output corresponds with 0 to 100 psi of pressure. | ||
A value is considered valid if the measured voltage is 1 V or greater (less than 1 V suggests an open circuit or failed sensor). The low and high thresholds are somewhat arbitrary, and based upon observation. A nominal pressure of 10 psi is assumed (add 8 psi to the limit per PHTA guidelines for a single-gauge backwash threshold). | A value is considered valid if the measured voltage is 1 V or greater (less than 1 V suggests an open circuit or failed sensor). The low and high thresholds are somewhat arbitrary, and based upon observation. A nominal pressure of 10 psi is assumed (add 8 psi to the limit per PHTA guidelines for a single-gauge backwash threshold). | ||