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Low Temperature Operation
Introduction
The CyScan sensor is a precision electromechanical device with hardware components
that, of necessity, are mounted in an external position on a vessel’s superstructure. It is
recognised that industrial marine operations may subject these components to harsh
environments, including low temperature.
The CyScan hardware complies with the requirements of IEC 60068-2-1 and is able to
operate for prolonged periods at temperatures down to – 25°C provided that certain
operating conditions are maintained.
If there is a requirement for CyScan to operate at temperatures below -25°C, contact
Guidance Marine.
Operating Conditions
The following recommendations are made for low temperature use:
•
If it is necessary for the system to be switched on after a prolonged period at
temperatures below 5°C (and down to – 25°C) the sensor will warm itself, but will
require some time to reach optimum operating condition.
•
If the unit is switched on after a period at temperatures between -15 to -25°C it will
not communicate with the Dashboard, the VFD will remain blank and the rotor will not
rotate until the internal temperature of the base unit rises above -15°C.
•
When the system is not in use (i.e. un-powered or suspended) the sensor should
be protected by means of a suitable insulating and protective cover to prevent the
external build-up of ice.
Technical Considerations
•
The CyScan sensor uses a sophisticated rotating infrared laser range-finder to
accurately measure the distance and bearing to retro-reflective targets that are placed
at specific locations in the working area. Movement sensors allow mechanically driven
optics to compensate for vessel motion due to wave action. The internal mechanism
may become disabled if it is allowed to cool in a low temperature environment.
•
A safety interlock prevents activation of the range-finder laser if the scanner rotor head
stops or is prevented from rotating by ice build-up.
•
View of the retro-reflective targets will be obscured by a build-up of ice on either the
optical window of the scanner or the surface of the targets (N.B. ice has poor reflective
properties at the infra-red frequency used by CyScan).
For operation below – 25°C additional forced air heating must
be provided. Do not use exhaust emissions as these contain
particulates which will degrade the optics.
Summary of Contents for CyScan AS
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