Hach Polymetron 2582sc Manual Del Usuario página 24

Problem
There is no significant
current increase when
the sensor is in the air
for calibration.
The measurement is
not stable.
24 English
Probable cause
There is contamination in the
electrolyte due to a loose filling
screw.
There is contamination in the
electrolyte due to a membrane
leak.
The membrane is torn.
The electrode is not correctly
mounted in the sensor body, so
there is a gap between the
membrane and the cathode.
Damage to the sensor cable or
connections occurred.
The membrane is worn.
There is a dark green deposit of
silver bromide (AgBr) on the
silver anode of the electrode.
There is water or humidity in the
sensor cable connector.
The connection of the sensor
cable is not correct.
There are air bubbles near the
cathode.
The sensor has been violently
shaken.
There is electromagnetic
interferences near the sensor or
sensor cable.
There is temporary interference
with other gases.
The sample flow rate is too low
(4 mL/h minimum).
Sludge from a heterogeneous
sample has caused damage to
the membrane.
There is a pressure variation in
the sample line.
Resolution
Replace the electrolyte. Refer to the illustrated steps
in Assemble the sensor on page 8.
Make sure that the electrolyte filling washer is
installed with the plastic filling screw. Tighten the
plastic filling screw with a screwdriver, but do not
use excessive force. Make sure that the sensor does
not have damage.
Replace the electrolyte and the membrane. Refer to
Replace the membrane on page 21.
Do the steps in Replace the membrane
Remove the electrolyte filling screw. Then, hand
tighten the holding nut for the electrode. Install the
electrolyte filling screw again.
Check the connection to the controller module. If
correct check the connections to the sensor cable
connector.
Do the steps in Replace the membrane
Do the steps in Replace the membrane
and Clean the electrode
Dry the sensor cable connector inside and out.
Examine the sensor cable connection at the module
in the controller. If correct, examine the connections
at the sensor cable connector.
Replace the electrolyte. Make sure that there are no
air bubbles at the bottom of the sensor body.
Examine the mounting and stability of the sensor.
Find a better location for the sensor cable and
examine the EMC levels.
The interference is primarily H
Increase the sample flow rate.
Install a deflector or change the sensor location.
Make sure the sensor is used at atmospheric
pressure.
on page 21.
on page 21.
on page 21
on page 22.
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