In-Situ Level TROLL Data Loggers Care & Maintenance Guide - Manual (Page 3)

Instruction Sheet
Desiccant stages (from left)
New, nearly expired (replace now), expired
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Replace desiccant before the entire volume has
turned pink.
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Desiccant absorbs moisture from the top down.
The black cap indicates the top.
Remember, replace desiccant before it
expires to prevent electronic damage to
your instrument.
Cleaning and Storage
Cleaning the Instrument
Clean the instrument body with water and a soft brush
or plastic scouring pad, or soak overnight in a mild acidic
solution, such as household vinegar. NEVER submerge
the twist-lock connector portion of the instrument.
If the ports on the front end are clogged with silt or mud,
try the following procedures.
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Agitate the instrument vigorously in a bucket of
clean water.
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Apply a gentle rinse of water from a wash bottle.
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In severe cases, remove the nose cone and clean
out the holes with a soft brush or pipe cleaner.
Do not attempt to remove material from the instrument
by tapping the instrument against a surface. To avoid
damage to the pressure sensor diaphragm, do not insert
any object into the sensor opening or attempt to dig out
dirt or other materials. You void the instrument's
warranty by inserting anything into the sensor
opening. If contamination cannot be removed using the
recommendations above, please contact In-Situ Inc. for
cleaning.
A TROLL pressure sensor with the nose cone removed.
Do not insert ANY object into the sensor opening.
Doing so voids the warranty.
Conductivity Cell
Fouling from mineral and biological sources can alter
the Aqua TROLL conductivity sensor's response.
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Always begin and finish cleaning procedures by
rinsing under running water to remove any loose
material.
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After cleaning, always check the calibration before
redeployment. Calibrate the instrument if
necessary.
Acceptable cleaning processes for the Aqua TROLL
are listed below.
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. Instruments are shipped with
polyurethane foam swabs for this purpose. You can
also use a thin cotton pipe cleaner and clean the cell
with a gentle back-and-forth “flossing” motion.
Process 2: Light scrubbing with a foam swab and an
aggressive soap such as Alconox
® detergent can be
used for 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 instrument 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 clean water.
IMPORTANT: If contamination cannot be
removed using these recommendations,
contact In-Situ Inc. for cleaning.
Twist-Lock Connectors
Keep the pins on all connectors free of dirt and moisture
by using the soft protective dust caps when cable is not
attached.
800-446-7488 3 www.in-situ.com