For complete reassurance that a suitable low resistance connection has been achieved, self-testing clamps with built-in LED indicator are recommended for safety-critical operations, such as product transfer.  Being operated by an internal battery, they are ideal where simple installation is desirable and an interlock is not required.

By confirming the reliability and condition of connections via the flashing LED, self-testing clamps enable the user to conform with CLC/TR 50404 which states that:  What is most important ..... is that all connections are reliable .... and not subject to deterioration (11.2.2).

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