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The UL 72 Class 125 represents one of the highest and most stringent tests currently used to evaluate media protection equipment by one of the world's leading independent testing agencies. Cabinets that are subject to testing by UL undergo a series of tests designed to replicate the effects of a very serious fire. Certain sections of testing done may also replicate extraordinary fire situations to accommodate for occasional demands placed on such equipment.
Testing Data Protection Equipment in compliance to UL assures Clients of its reputed protective qualities. It is well proven that burglar resisting safes and steel filing cabinets are ineffective for protecting media storage equipment as floppy disk manufacturers recommend that disks should not be exposed to temperatures exceeding 52°C.
The objective of this Test is to ensure that the Cabinet has been designed to limit internal temperature to no more than 52'C with a humidity not exceeding 80% after one hour exposure to a severe fire. The most critical area of concern in this Test is often not during the fire itself but rather after the Test, during the 'furnace soak-out' period.
The 'furnace soak-out' is when the Cabinet is left to remain in a closed furnace after the flames have been put out to replicate an 'after-fire' environment. This Test is conducted to ensure that internal temperatures do not exceed the maximum 52'C after the fire due to external heat slowly radiating into the Cabinet.
At no time during the Test does the UL Test Requirement allow the temperature inside the Cabinet to rise higher than the temperature suitable for diskettes in order to pass the Test successfully.
This Test is designed to reveal if the Cabinet is able to withstand sudden exposure to high heat without exploding. The Test requires for a cold cabinet to be pushed into a furnace pre-heated to a temperature of 1090°C (2000°F) to simulate a Cabinet falling into a fire. The furnace exposure continues at this temperature for 30 minutes. If no explosion results, the cabinet is left to remain in a closed furnace until sufficiently cool to be opened.
This Test requires for a hot cabinet to be dropped from 30ft (9.1 m) onto rubble to simulate the effect of a floor collapsing during a fire. The Cabinet is then inverted and returned into the furnace and heated for a further 30 minutes to show that it still provides protection.
After the Impact and Re-heat test, the Cabinet is examined for deformation, rupture of parts or insulation and other evidences of through openings into the interior. The door of the Data Cabinet is forced open only after it has sufficiently cooled from the exposure to fire.
In all the above Tests - the Fire Endurance, Fire Shock and Impact and Re-heat Test, the Chubb Data Cabinet has complied to the requirements of UL 72 Class 125 for Fire Protection. In addition to the various Tests outlined above, UL also reserves the right to inspect the manufacturing facility, components and suppliers that make up the manufacturing process of the Chubb Data Cabinet.