Specifications

23G-Series RO System
3024270 Rev G 104 14Oct13
V1 and V2 main logic boards and relay boards are interchangeable (i.e.,
you could have a V1 main logic board and a V2 relay board and vice
versa).
23G machines built after 1997 contain Version 2 (V2) circuit boards. This
new circuit board includes extra electronic components built into the circuit
board. When ordering replacement parts identify whether you have V1
(machines built prior to 1997) or V2 (machines built after 1997). Contact
your equipment supplier with questions.
Normally, the only sensor requiring periodic calibration is the pH probe,
which should be checked semi-annually.
8.2 pH Calibration Procedure - Software Version V2
1. Obtain two standard pH reference solutions with different pH
values. Solutions of pH 4.0 and 7.0 or of pH 4.0 and 10.0 are
recommended.
2. Remove the pH sensor from the incoming waterline, and rinse in
tap water.
3. From the calibration menu, use the ENTER key to scroll to the pH
cal low menu item. Before changing the pH calibration value, place
the wetted end of the pH sensor in the standard solution with the
lower pH. Swirl it a little and leave it dipped - with at least 1 inch of
the sensor length submerged (so that the metal body of the probe
is in contact with the solution by approximately 1/4-inch).
4. On the ECM-100, enter passcode 1. Using the ARROW keys,
change the pH cal low setting to be 10 times that of the pH of the
solutions. For example, 40 for 4.0 solution. The number indicates
tenths of a pH unit. Press the ENTER Key to store the calibration
value and go on to the high pH limit.
5. The next setting in the calibration menu is pH cal high. Before
dipping the pH sensor in the high pH solution, rinse the pH sensor
with pH neutral water. The pH sensor may also be rinsed with some
of the high pH solution. Place the sensor in the standard solution of
higher pH. Swirl it a little bit and leave it dipped - with at least 1
inch of the sensor length submerged.
6. On the ECM-100, enter passcode 1 again. Using the ARROW keys,
change the pH cal low setting to be 10 times that of the pH of the
solution. For example, 70 or 7.0 solution or 100 for 10.0 solution.
Again, the number indicates tenths of a pH unit. Press the ENTER
key to save the new reading.
7. Calibration is now complete. To check it, rinse the probe with tap
water and dip it into the low pH solution again to see if it reads
accurately. Repeat the calibration if necessary.