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Testing the Enclosure

Testing the Enclosure. Original Plan: Intrinsic safety and wireless communication New Plan: Sensor circuitry and relay together, and totally enclosed EE team will verify the enclosure excludes dust Using FM Global Approval Notes ISA requirements. Dust Circulation Testing.

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Testing the Enclosure

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  1. Testing the Enclosure • Original Plan: Intrinsic safety and wireless communication • New Plan: Sensor circuitry and relay together, and totally enclosed • EE team will verify the enclosure excludes dust • Using FM Global Approval Notes • ISA requirements

  2. Dust Circulation Testing • We will build an apparatus to determine whether the enclosure is dust tight. • Create vacuum within enclosure • Circulate talcum powder within chamber

  3. Impact Testing • 2.7 J impact test for Class II • 1kg test mass, falling from height 270mm • Steel hemisphere 25mm diameter as impact point • Unit assembled, mounted on concrete with mass over 20kg • (Drop test not necessary- not portable)

  4. Thermal Endurance • Non-metallic elements which dust-protection is dependent must undergo thermal endurance testing • Heat: 4 weeks at (90±5)% humidity, (20±2)K above maximum service temperature • Cold: 24hr, 5 to 10K below minimum service temperature

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