Why are the Input Terminals on the Rear Panel of the Power Meter?

The input terminals on all Yokogawa power meteras are located on the rear panel. This takes into account safety when handling the measuring instrument.

The signal input to the power meter normally carries high voltage and large current, so we place the terminals in the back so that the user will not accidentally touch an electrical component when operating the front panel keys. Recently, we are designing safety into our products through the use of safety terminals for voltage terminals, binding posts for current terminals, and protective covers that make it difficult to touch the terminals. However, sometimes you can forget the protective cover, or a disconnection happens unexpectedly, so to ensure safety we feel it is desirable to locate the input terminals on the rear panel.

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