Chapter 9 Maintenance; Retrieval Of The Sensor; Anti-Fouling On Transducer Surface; Factory Service - Aanderaa ZPulse DCS 4420 Operating Manual

February 2020 – TD 266 OPERATING MANUAL – ZPulse® DCS 4420/4830/4520/4930 Page 111

CHAPTER 9 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.

9.1 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.

9.2 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.

9.3 Factory service

Factory service is offered for maintenance, repair or calibration.
When returning your DCS for service please contact Aanderaa Service department, aanderaa.support@xyleminc.com
or your local representative for a Return Material Authorization number (RMA) prior to shipment. This RMA number
should follow the shipment, and be included in all further correspondence with Aanderaa regarding the equipment
returned.