Section 8; Utility Passwords 9000-9020; Set-Up Digital Flow; Proportional Feed - Pentair AK110 Installation And User Manual

From the Main Status screen press [4] to enter the password screen .
9001 – Enter once for 1-second data recording rate. Enter a second time for 5-minute data recording rate.
To go back to the default 2-hour recording sample rate, power the unit off and then back on .
9003 – When in "Calculated PPM" mode, shows the actual ORP and the adjusted ORP derived from
Calculated PPM calibrations .
To use Switch 1 or Switch 2 as a digital flow switch you must first set it up in the flow switch set-up screen . To enter
the setup screen from the MAIN SCREEN, move the cursor to the switch "S" to be setup and press ENTER . Enter the
number of pulses per gallon from 0 to 999 .9 . NOTE: Switch 1 is the default flow switch for relay control and should not
be used for digital flow if switch 2 is available .
To clear the total accumulate flow counter, place the cursor to CLEAR and press ENTER .
The proportional feed value determines the ratio of feed ON time in a cycle . The general principle is that a relay should
be on for a reduced amount of time as it nears set point so as to minimize chemical feed overshoot. A lag time exists
between the time the chemical feeds and the sensors "read" the new values . Older Controllers would have a relay on
continuously which can lead to significant overshooting of the chemical feed. The Controller adjust the ratio based on
how far from the set point is from the measurement. The following tables shows examples of feed times for various
conditions:
Set
Measurement
Point
700
700
700
700
700
700
Table 3 . ORP Control with the Cycle Time control type .
Cycle time = 6 minutes
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ACU-TROL AK110 Chemical Controller Installation and User's Guide
®

SECTION 8

APPENDIXES
Utility Passwords 9000-9010
Set Up Digital Flow

Proportional Feed

Prop %
630 10%
631 10%
698 10%
665 10%
100 10%
699 10%
Actual On Actual Off
00:06:00 00:00:00
00:05:54 00:00:06
00:00:06 00:05:54
00:03:00 00:03:00
00:05:06 00:00:54
00:06:00 00:00:00
Cycle
00:06:00
00:06:00
00:06:00
00:06:00
00:06:00
00:06:00