IONTECH
®
IT-DS EDI Modules
NOTE: A carbon dioxide test kit is necessary to measure the CO2 concentration in
The DC current set point is determined based on the following site conditions:
• Feed water conductivity
• Feed water carbon dioxide concentration
The following equation will calculate the current to be applied to one IT-DS module. For multiple
systems, each one should be controlled individually and set to this current.
To determine the current setting (amps), follow these steps:
a) Calculate Feed Conductivity Equivalent (FCE)
FCE = Measured Conductivity, (µS/cm) + (CO
2
ppm x 2.79)
I
current
= (1.31) (Q liters/min) (FCE)
Where: Q = Product flow (liters/min)
FCE = Feed Conductivity Equivalent
c.e.= %Current Efficiency,10 to 20 is typical
dilute_cells = number of product(dilute) compartment
cells (IT-DS4 has 4 product compartment
cells and IT-DS10 has 10 product
IT-DS45has45
product compartment cells)
Example - for one IT-DS30:
Product Flow = 15 gpm = 56.8 liters/min
Feed conductivity = 2.0 µS/cm
Feed carbon dioxide = 3.75 ppm CO2 1. FCE
= 2.0 + (2.79) (3.75) = 12.46
2. I = [(1.31) (56.8 GPM) (12.46 µS/cm)] / [(30cells)(20)] = 1.5 Amps
Example Above - SET THE CURRENT AT 1.5 AMPS
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