TRUBLUE USER’S MANUA
L
Water Level, Conductivity, and Barometric Pressure Data Loggers
TE CONNECTIVITY SENSORS
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TRUBLUE USER’S MANUA
L
08/2016
Page 14
12. Maintenance
of Your CTD (Conductivity, Temperature, Depth) Device
GENERAL MAINTENANCE PRINCIPLES
Conductivity meters and cells should be calibrated to a standard conductivity solution, this should only be
done when the device is clean. Selecting standards is very important; you should always choose one that has the
approximate conductivity of the solution environment to be measured (stream, ocean, etc.). Sometimes users like
to have a second calibration point either above or below the main calibration point, which is useful for measuring
applications that have greater conductivity spans. Conductivity sensors, like any other sensor installed in a
process, will eventually succumb to contamination from the process. Regular cleaning of the conductivity sensor
will assure long, reliable and accurate service. Careful examination of the electrodes should be performed to
make sure they have not been chemically attacked, eroded or physically altered. A slow degradation of the sensor
is hard to spot until it’s too late. Cleaning should be done with a combination of soaks and rinses in a solution of
water and detergent. This usually removes most contaminants. Persistent contaminants may require a brief
soaking in weak acid or diluted caustic solutions. Acetone easily cleans most organic matter, and hypochlorous
solutions will remove algae, bacteria, or molds. Follow by thoroughly rinsing with clean water to remove and
neutralize any residual acid or caustic solutions.
CAUTION:
Always follow all safety procedures when using chemicals to clean conductivity sensors.
Clogged nose piece or a dirty transducer diaphragm could result in erroneous readings from your
transducer.
CLEANING YOUR DATA LOGGER
The water level data logger can be cleaned by gently swishing it back and forth in a bucket of warm,
soapy water until the residue softens and washes off. Either a clogged nose piece or a dirty diaphragm could
result in erroneous readings from your unit.
WARNING.
Never attempt to clean the unit’s nose piece or diaphragm with a sharp or hard object. This
could dent the sensor diaphragm and cause permanent damage to the data logger.