Hayward CAT-2000 CAT 2000 - Page 20

pH Alarm High Limit P.AH pH Alarm Limit High. Sets the high alarm point for the pH channel. When the measured pH value is greater than this limit, the audible alarm will be activated and the pH feed output will be disabled. The alarm will be cleared and feed will resume automatically when the measured pH value returns to within the non-alarm range. 8.2 Use the UP and DOWN buttons to select a value between 6.0 and 9.0 pH. The value must be greater than the pH alarm low value. The default value is 8.2 pH. ORP Proportional Feed O.PF ORP Proportional Feed. Selects either fixed setpoint or proportional control. OFF Off. The ORP feed output is activated based on a simple above or below setpoint decision. When the measured ORP value is less than or equal to the ORP setpoint, the ORP output feed is turned on. Otherwise, the ORP feed output is turned off. On On (Default). The ORP feed output is activated based on the difference between the ORP setpoint and the measured ORP value. As the difference increases, the duration the ORP feed output is turned on increases to 20, 30, 40, and 50 seconds of the 60 second cycle, and then the ORP feed output is turned on continuously. ORP Overfeed Timer O.OF ORP Overfeed Timer. When Off is selected, the ORP feed output will remain activated as long as an ORP feed condition is indicated. When any other selection is made, an overfeed limit timer is enabled on the ORP feed output. After the ORP feed output has been turned on for a period of time greater than this limit, the ORP channel is turned off and placed into an overfeed alarm condition which must be manually reset. If ORP Proportional Feed: On has been selected, the ORP feed output must be on continuously for the overfeed time limit, rather than in the part of the proportional feed cycle in which the ORP feed output is on for only a portion of the 60 second proportional feed cycle. After the ORP feed channel is placed into the overfeed alarm condition, the ORP channel is turned off and the ORP Feed Mode indicator flashes rapidly to indicate the alarm. Press the ORP Feed Mode button to return the ORP channel to the off, manual or automatic feed mode. This will reset the ORP overfeed alarm and restart the overfeed timer. The ORP overfeed alarm will also be reset if the controller is powered off and then back on. CONTENTS COPYRIGHT 2010 HAYWARD INDUSTRIES, INC. ALL RIGHTS RESERVED