Chapter 7 Maintenance; Retrieval Of The Sensor; Anti-Fouling On Transducer Surface; Factory Service - Aanderaa DCPS 5400 Operating Manual

Page 80

CHAPTER 7 Maintenance

With 50 years of instruments design and production for the scientific community, in use around the world, you can
count on our reputation for designing the most reliable products available.
We are guided by three underlying principles: quality, service, and commitment. We take these principles seriously,
as they form the foundation upon which we provide lasting value to our customers. Our unmatched quality is based
on a relentless program of continuous monitoring to maintain the highest standards of reliability.
In order to assure the quality of this sensor, critical properties are tested during production. A special form, named
'Test and Specification Sheet' (delivered with the sensor) lists the tests and their results and checkpoints.
8.1
Retrieval of the sensor
Clean the Transducer Head after each deployment.
Note!
Do not use any form of steel brush or any sharp objects on the Transducer Head, as this will damage the acoustic
elements.
The sensor housing will tolerate most cleaning agents. Often 30% Hydrochloric acid (HCL) (Muriatic acid) or acetic
acid will be useful for removing barnacles and similar fouling.
Be sure to follow the safety precaution for such acids.
8.2
Anti‐fouling on transducer surface
The front layer on the transducers is optimized to give optimal matching between the transducers and the sea water
to get as high sensitivity as possible. Applying anti‐fouling to the surface may give reduced sensitivity. The best way
to keep the fouling away would have been to wash the surface at a regular interval, for example once a week or
dependent on how fast the growth is. This is however not very practical.
If applying anti‐fouling, use a very thin and evenly layer on the transducer surfaces. The best is to use a coating
which can be sprayed on as very thin layer.
8.3 Factory service
Factory service is offered for maintenance, repair or calibration.
When returning Doppler Current Profiler Sensor, always include the Instrument Service Order, Form No. 135; see our
web pages under 'Support and Training'.
Normal servicing time is four to six weeks, but in special cases the service time can be reduced.
A main overhaul and service is recommended at the factory every three years.
December 2015 – TD 304 OPERATING MANUAL – Doppler Current Profiler Sensor