Specifications

Channel Master Operation Manual
page 36 Teledyne RD Instruments
8.9.3 Applying Antifouling Paints
Follow the urethane faces application instructions for TRILUX II. One thin
coat can last for several months.
NOTE. You cannot protect the pressure sensor from biofouling. The
pressure sensor is located near the center of the transducer array,
between the urethane-covered transducers. The sensor port is a small
hole drilled through a screw (see “Pressure Sensor Maintenance,” page
37). You must tape off the screw during anti-fouling paint application.
This means that the sensor port is not fully protected from bio fouling. The
sensor port is surrounded by the antifouling paint, but bio fouling may build
up on the screw, and eventually clog the sensor port. However, most
organisms do not seem to find the small amount of unpainted surface
attractive. If it is logistically possible to periodically inspect/clean the
pressure sensor screw, it is highly recommended. This tradeoff situation
must be analyzed for individual deployments. Unfortunately, the location of
the deployment site usually dictates action in this regard.
Transducer Faces (urethane surfaces) and Plastic Housing
a. Lightly sand by hand the plastic housing and urethane face with 120-grit
paper.
b. Mask off the Thermistor and Pressure Sensor copper screw.
c. Apply one or two coats of Trilux-2 at four mil/coat. If applying a sec-
ond coat, wait at least 12 hours to allow the first coat to dry. One coat
lasts one season (3-4 months); two coats might last one year.
8.10 Thermistor Maintenance
In order to respond quickly to changes in the water temperature, water must
be able to flow over the sensor. Do not block the sensor or paint over it
with antifouling paint. Remove any biofouling as soon as possible.
NOTE. The Thermistor is embedded in the transducer head. The sensor
is under a titanium cover that is highly resistant to corrosion.