75
5.3.15
Relay Output, Flow Meter Ratio Control Mode
ONLY AVAILABLE IF HVAC MODES ARE ENABLED IN CONFIG MENU – GLOBAL SETTINGS
Flow Meter Ratio Control Mode is typically used in cooling water applications to control the conductivity of
the water using volumetric cycles of concentration. The controller measures the volume of makeup water going
through one or two water meters, and after a programmable amount, activates the relay to control a programmable
volume out through one or two bleed water meters.
Output Details
The details for this type of output include the relay on/off state, HOA mode or Interlock status, Accumulated make
-
up water total, bleed cycle volume, remaining volume, relay on-time for this cycle, accumulated on-time, alarms
related to this output, relay type, and the current control mode setting.
Settings
Touch the Settings icon to view or change the settings related to the relay.
Accumulator Volume
Enter the volume through the makeup water meters that will activate the relay.
Bleed Volume
Enter the volume through the bleed water meters that will deactivate the relay.
Makeup Meter
Select the makeup water meter from the pulldown list.
Makeup Meter 2
Select the makeup water meter from the pulldown list, if applicable, or leave at None.
Bleed Meter
Select the bleed water meter from the pulldown list.
Bleed Meter 2
Select the bleed water meter from the pulldown list, if applicable, or leave at None.
5.3.16
Relay Output, Flow Proportional Mode
ONLY AVAILABLE IF CONTROLLER INCLUDES PULSE OUTPUT HARDWARE
Overview
In Flow Proportional control mode, the controller monitors the rate of flow through an analog or digital flow meter,
and continuously adjusts the proportional band to achieve a target PPM level.
The user enters the target PPM and the data necessary to calculate the proportional band (the water flow rate at
which the maximum pulse rate will occur) required to maintain the target PPM with that flow rate of water.
% output = Target PPM
x Water Flow Rate (liter/min or gal/min)
Cycles x Pump Capacity (liter or gal/hr) x Pump Setting (%) x Specific Gravity x 166.67
% output = Target PPM
x Water Flow Rate (m3⁄min)
Cycles x Pump Capacity (liter/hr) x Pump Setting (%) x Specific Gravity x 0.16667
Control Operation
If the output is continuously on for longer than the Output Time Limit, then output will deactivate.
Output Details
The details for this type of output include the output %, HOA mode or Interlock status, alarms related to this
output, flow input value, current cycle on time, total accumulated on-time, raw pulse rate output, and the current
control mode setting.
Settings
Touch the Settings icon to view or change the settings related to the relay.
