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This option is only available if a conductivity node (NCON) is installed as the MAKEUP COND
input.
If the NIN is installed with a conductivity node installed as the MAKEUP COND input the BLOWDOWN
relay can be configured to blow down based on multiple setpoints instead of a single tower setpoint.
There are three different setpoints that can be established based on the value of the makeup water
conductivity.
The user programs three ranges of makeup water conductivity and a setpoint for each of the three
ranges. The controller determines which of the three setpoints to use based on the conductivity of the
makeup water conductivity.
When BY MULTI-SETPOINT is selected in the blowdown relay setup screen the MULTI-SETPOINT
screen is displayed.
MULTI-SETPOINT
=========================
1 SETPOINTS/RANGES
2 DEADBAND
3 BLOWDOWN TIMEOUT
Press ―1‖ SETPOINTS/RANGES
SETPOINTS / RANGES
=========================
1 1000, 0000 - 0300
2 1500, 0300 - 0500
3 2000, 0500 - UP
Establish a setpoint for three ranges of makeup water conductivity. The first range
always starts at 0 µS. The second range starts at the top of the first range. The third
range is any conductivity above the second range.
13.7 Configuring Relays 2,3 and 4
Below is the RELAY OPTIONS screen. The asterisk (*) next to one of the options tells you how that
relay is configured. Relays 2, 3, and 4 can be programmed in each of the methods shown on the
RELAY OPTIONS screen.
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