Specifications

23G-Series RO System
3024270 Rev G 101 14Oct13
The ECM-100 calculates % rejection using the following equation:
% Rejection =
1-
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.