Page 10 - GETELEC catalogue US 2020

The 24 criteria defining sealing

and electromagnetic shielding

functionality

A ELECTROMAGNETIC CRITERIA

1 Frequency band used by system.
2 System's power output.

3 Level of attenuation needed from the shielding system.

4 Emission shielding protection or susceptibility.
5 Compliance with MIL G 83528, STD 285, 89/336/CEE shielding standards.

B EXTERNAL ENVIRONMENT AGGRESSIVITY REQUIREMENTS

6 Working temperature (continuous and peak) and system storage temperature.

7 Working and storage relative humidity.

8 Contact with aggressive substances: hydrocarbons, acids, solvents, NBC, gases, etc.
9 Salt fog resistance (number of hours' exposure).

10 Product inflammability- Compliance with flame resistance standards UL 94 - VO - V1...

C PHYSICAL REQUIREMENTS

11 Mechanism precision, type of mechanism, means of achieving.
• Sheet metal • Casting • Machining
• Moulding • Plastic

12 Space available flat seal or fitted in a groove.
13 Gasket crush specification

• Crush limits
• Number of screws and spacing between fixings • Tightening torque
14 Sealing system specification.

15 Vibration and shock resistance.

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