ATI
Q46H/63 Combined Chlorine System
Part 5 – Sensor Assembly
31
O&M Manual
Rev-K (11/18)
Figure 21 - Submersible Chlorine Sensor Assembly
Follow the procedure below to prepare the chlorine sensor for operation:
1. Unscrew the electrolyte chamber from the assembled sensor and also remove the vent screw
from the side of the sensor body.
2. Remove the front nut from the bottom of the chamber and discard the protective membrane.
O-rings are contained in grooves on both the bottom and top of the chamber. Be sure that
these o-rings remain in place.
3. From the package of membranes supplied with the sensor, place a new membrane into the
front nut.
The membrane is white in color and is separated from other membranes by a
light blue paper spacer.
CRITICAL NOTE
:
The 05-0023 membrane used on the combined chlorine sensor
MUST
be installed with the proper side facing the sample.
Examine the
membrane carefully to identify the “shiny” side
. The membrane has
a dull side and a shiny side.
The shiny side must face out
, or be in
contact with the measured sample. Reversing the membrane will cause
no damage, but the measurement will be very unstable.
4. Screw the front nut on to the chamber until you feel the o-ring compress. Hand tight
compression is all that is needed. Do not use tools to tighten. The membrane should be flat
across the bottom of the chamber without wrinkles.
5. Fill the chamber with electrolyte until the level reaches the bottom of the internal threads. A
drop or two of electrolyte may drip from the white vent on the side of the sensor, but this is
not a problem.
6. Slowly screw the chamber onto the sensor body. A small amount of electrolyte will run out of
the hole from which the vent screw was removed. Place a paper towel around the sensor to
absorb the electrolyte overflow.
The electrolyte is harmless and will not irritate skin. Tighten
