Specifications

23G-Series RO System

3024270 Rev G 101 14Oct13

The ECM-100 calculates % rejection using the following equation:

% Rejection =

Permeate Conductivity

x 100

Feed Conductivity

Since the % rejection is based on a ratio between the feed

conductivity and the permeate conductivity, higher quality feed

water may result in a low % rejection alarm. Higher recovery will

typically lower the permeate rejection using the ECM- 100

calculations.

If a low % rejection alarm results from high purity feed water when

the permeate conductivity is at acceptable levels, the following

three methods could be used:

1. Reduce low % rejection alarm setpoint.

2. Adjust the feed conductivity calibration potentiometer for a

slightly higher feed conductivity reading. See Section 8.0 for

calibration of feed conductivity.

NOTE:

Adjusting feed conductivity to a slightly higher reading will result in an

inaccurate feed conductivity displayed on the ECM-100.

3. Use a resistor in place of the feed sensor. Remove the feed

conductivity input and replace with a resistor to simulate a feed

conductivity. A 10 K ohm resistor would indicate 250 S.

NOTE:

To properly monitor permeate conductivity make sure the PERM HI COND

ALARM Menu in the Maintenance Menu (10) is properly set. See Section

4.4.10 for accessing Permeate High Conductivity Alarm Menu.

For additional assistance contact your equipment supplier.