In-Situ Aqua TROLL 100 and 200 Operators Manual - Manual (Page 83)

Page 83 Aqua TROLL Operator’s Manual
Conductivity Sensor
Fouling from mineral and biological sources can alter the sensor’s
response.
4
Rinse under running water to remove loose material.
4
Always finish with a rinse in clean water.
4
After cleaning, always check the calibration before
redeployment, and recalibrate the sensor when necessary.
Acceptable cleaning processes fall into the following categories:
Process 1: Light scrubbing with a soft swab and mild soap such as
a dilute solution of dish detergent. Be careful not to damage
the plastic material of the conductivity cell.
Aqua TROLL Instruments are shipped with
polyurethane foam swabs for this purpose. You
can also clean the conductivity cell using a thin
cotton pipe cleaner and a a gentle back-and-forth
motion.
Process 2: Light scrubbing with a foam swab and an
aggressive soap such as Alconox detergent can
be used for more stubborn deposits.
Process 3: Dilute (10:1) acetic acid, or consumer-packaged white
vinegar, can be used to pre-soften calcium deposits. Follow this
with Process 1 or Process 2, depending on the degree of residual
contamination. The Aqua TROLL can soak for any length of time
in dilute acetic acid. If this does not completely remove the
material, try Process 4.
Process 4: Dilute phosphoric acid (< 27%) or the consumer product
Lime-A-Way ® can be topically applied with a soft swab to remove
iron or calcium deposits that remain after using Process 3. Do
not soak for more than 10 minutes. Rinse well with water.
If contamination cannot be removed using the recommendations
above, please contact In-Situ Inc. as described on page 10.
Section 9: Care & Maintenance
TIP: Alconox
is available from
In-Situ Inc. (Catalog
No. 0029810).
DO NOT SOAK in
phosphoric acid or
Lime-A-Way
® for
more than 10 minutes.
TIP: Foam swabs
are shipped with
the Aqua TROLL
Instrument;
replacements are available
from In-Situ Inc. (Catalog No.
0056820).