June 2022 – TD 320 OPERATING MANUAL – TURBIDITY SENSOR 4296
Page 95
Electro Magnetic Compatibility
For a manufacturer to legally produce and sell a product, it must apply for CE marking. This
means that the commercialized product is conform to the CE applicable standards and can freely
circulate within the EFTA (European Free Trade Association) & European Union countries. The
applicable directive for the Turbidity products is the EU EMC 89/336/EMC (all electrical and
electronic appliances) which mainly focus on the electromagnetic disturbances the sensor can
generate, which should not exceed a level allowing radio and telecommunication equipment to
operate as intended, and that the sensor has an adequate level of intrinsic immunity to
electromagnetic disturbance to be able to operate as intended. This chapter describes the
requirements for the Electromagnetic Compatibility (EMC) of the sensor; EMC filter and protection
solutions can be required if used stand-alone.
9.1
EMC Testing
The Turbidity sensor has been tested at an accredited test laboratory to verify that the sensor
fulfils the requirements in the EU EMC directive (89/336/EMC).
Applied standards
•
EN55011 (2009)+A1
•
EN 61326-1 (2013)
Applied tests
•
Conducted Emissions
•
Electrostatic Discharge Immunity
•
Surge Immunity
•
Conducted RF Disturbance Immunity
Other tests were found as not relevant to this sensor due to underwater use and DC power.
9.2
Cables
Different cables are available for stand-alone use with free end and connectors. The cables have
both power and signal lines (RS-232/RS-422). Contact factory for more information on cables that
is best suited for use in the actual application. When delivered, system drawings/cable drawings
give details on parts connection and installation overview with best EMC performance (best noise
and surge immunity).
9.3
Power – Voltage range
The input voltage range is from 6 to 14Vdc. When using long cables the voltage should be as
close to 14V as possible.