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tri F/oa< <br /> 3W�K.fi <br /> 500 Gtrdon AUpI <br /> TcYrrK <br /> Acid Moh&"r) 14uel Alatr"i,Y Acid AlrtF',nn <br /> pc+rAO w/ Z purrp� purnp�� <br /> 4f 4x#- -rank P/f*Z Adj. Toni- <br /> 1,r x3 Aaj •Tavi� <br /> Figure 3-6 Acid tank <br /> 3 . 5 Acid feed operation While the Kari float switch from the <br /> equalization tank is energized, there <br /> should be electrical power available to <br /> all three acid metering relays. <br /> pH #1 adjust. tank: When the pH ranges from 11 to 14 in the <br /> pH #1 adjustment tank, the pH probe #1 <br /> will send a signal to the pH monitor <br /> #1; The pH monitor #1 energizes the <br /> acid metering pump #1 to feed acid. <br /> pH #2 adjust. tank: When the pH ranges from 10. 5 to 14 in <br /> the pH #2 adjustment tank, the pH probe <br /> #2 will send a signal to the pH monitor <br /> #2 ; The pH monitor #2 energizes the <br /> acid metering pump #2 to feed acid. <br /> pH #3 adjust. tank: When the pH ranges from 9 . 5 to 14 in <br /> the pH #3 adjustment tank,the pH probe <br /> #3 will send a signal to the pH monitor <br /> #3 ; The pH monitor #3 energizes the <br /> acid metering pump #3 to feed acid. <br /> Low level alarm: When the acid in 500 gallon poly tank <br /> reaches a low level,the Kari float <br /> switch inside the tank energizes the <br /> alarm to warn the operator that the <br /> acid tank needs to be refilled. <br />