Evoqua Wallace & Tiernan Depolox 3 plus, Manual

Page: 82 / 157

WT.050.560.001.UA.IM.0714 68
Depolox
®
3 plus ReSIDUAl ANAlYZeR
eVoQUA W3T140188
Inserting the Membrane Sensor for Free Chlorine FC1 Into the Flow-Through
Adapter
1. Push the sensor through the cover into the flow-through adapter until
it touches the inflow mating connector. It may be necessary to position
the flow-through adapter cover correctly by turning it.
NOTE: Remove air bubbles from the surface of the membrane, bubbles
on the membrane will interfere with the measurement!
2. Connect the measuring signal cable to the FC1.
Storing the Membrane Sensor for Free Chlorine FC1
1. Lift elastomer seal and unscrew membrane cap.
2. Remove G-holder (with tweezers, if necessary) and rinse together with
the membrane cap and electrode finger with clean (distilled) water.
Leave in a dust-free place to dry.
3. Then loosely screw the dry membrane cap onto the electrode shaft
(place G-holder loosely into the membrane cap; not attached to elec-
trode finger).
NOTE: The membrane may not touch the gold working electrode.
Restarting: Refer to “Commissioning the membrane sensor for free chlo-
rine FC1”.
Error in Membrane Sensor for Free Chlorine FC1
Trouble-shoot and debug if the measuring signal is too low or irregular:
1. Remove air bubbles on the membrane (e.g. tap the inflow mating con-
nector); air bubbles prevent the chlorine from diffusing through the
membrane and distort the measurement.
NOTE: Air bubbles on the remaining parts of the sensor are normal after
initial commissioning or restarting; they evaporate after one or two days.
2. Replenish electrolyte.
3. Open membrane sensor. To do this, push the elastomer seal to one side
to permit the inflow of air and unscrew the membrane cap.
CAUTION: Do not unscrew the membrane holder from the membrane cap
under any circumstances!
!