Electrocorder EC-1V (Mailable) Voltage RecorderOverview The Electrocorder EC 1V is a compact single phase voltage recorder for plug in voltage monitoring, customer voltage complaints, voltage optimisation checks and mailed voltage investigations. Use it when you need a simple way to record true RMS voltage, minimum voltage and maximum voltage from a standard socket. The EC 1V is especially useful when a logger needs to be sent to a customer or remote site so voltage evidence can be collected