Simrad SP270 Installation Manual download pdf (Page 33)

Introduction

851-160571 / B

Unpacking and servicing ESD sensitive equipment

If it is necessary to open and touch the electronics inside the

boxes/cabinets, then the following precautions MUST be taken:

• The working area must be covered by an approved

conductive service mat that has a resistance of between 50kΩ

and2MΩ, and is connected directly to a reliable earth point

via its earthing cord.

• The service personnel involved must wear a wrist-band in

direct contact with the skin, connected to the service mat.

• Printed circuit boards and other components should be placed

on the conductive service mat during installation,

maintenance etc.

Caution If, for any reason, it is necessary to move the circuit

board or components from the conductive service mat,

they must be placed in an approved anti-static

transportation container (e.g. static shielding bag)

before transportation.

• During installation and servicing, all electrical equipment

(soldering irons, test equipment etc.) must be earthed.

Temperature protection

If the unit must be protected against extremes of temperature,

the carton/crate must be lined on all walls, base and lid with

5 cm thick polyurethane or polystyrene foam.

These units will be identified as delicate in the applicable

documentation.

The package must then be clearly marked:

Must not be transported or stored in temperatures

below -5 degrees Celsius.

Other units can normally be stored in temperatures between

-30°C and +70°C, though refer to the system’s Technical

Specifications document for details.

Transducers must not be stored in temperatures below -20°C.

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Simrad SP270 Installation Manual Page 33