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The SETPOINT is the Conductivity value that you are trying to maintain. Check with your water
treatment engineer to determine the Conductivity setpoint for your system needs.
Follow these instructions to establish the controller's setpoint:
Use the keypad numbers to enter the proper Conductivity setpoint and press ‖ENT‖. When
finished, you will automatically be moved down to the deadband.
NOTE: A high conductivity alarm will override this setpoint and force a blowdown to occur.
13.1.5 Deadband
After the setpoint is established, the controller's deadband must also be set. "Deadband" refers to the
amount of conductivity above and below the setpoint—a range within which the controller will not react.
Due to continuous fluctuations in the conductivity level, it is necessary to have this deadband range or
stable readings will be difficult to maintain. The Deadband should be a small percentage of the setpoint.
Half the deadband amount will be automatically put above the setpoint, and the other half below it.
For example, a conductivity setpoint of 1000 µS with a deadband of 20 µS would result in the relay
turning on at 1010 µS and turning off at 990 µS.
Use the keypad numbers to enter the proper deadband setpoint and press ‖ENT‖. When
finished, you will automatically be switched to the BLOWDOWN TIMEOUT alarm screen.
13.1.6 Blowdown Timeout
The BLOWDOWN TIMEOUT alarm is designed to notify the operator of a problem in the blowdown
system such as, a clogged strainer, or the blowdown valve failed to open. The BLOWDOWN TIMEOUT
function will display a visual alarm on the display, but it will NOT turn off the relay. If a relay is
configured as an alarm relay, the BLOWDOWN TIMEOUT alarm will energize the alarm relay. To
disable this function set the BLOWDOWN TIMEOUT time to 0:00.
Use the keypad numbers to enter the time in hours and minutes before this alarm will appear and
press ‖ENT‖. Maximum setting is 17 hours and 59 minutes.
13.2 By MakeUp Volume
NOTE: For this configuration of the blowdown relay, MTR 1 is always assumed to be the makeup
water meter and MTR 2 is assumed to be the blowdown water meter. Ensure that this is the case
with your wiring or conductivity control will not function properly.
To program the blowdown to be based on volume, select ‖3‖ BY MAKEUP VOLUME in the
BLOWDOWN RELAY screen. The following screen will appear.
BY MAKEUP VOLUME
=========================
1 FOR BLOWDOWN FLOW
2 FOR BLOWDOWN TIME
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