The VAF model meters from Trinity are True RMS type digital meters for use in three phase four wire LT electrical systems. The design of these meters is based on proven micro-controller technology, resulting in compact and accurate meters. The design uses powerful micro-controller based technology
A voltmeter is an instrument used for measuring electric potential difference between two points in an electric circuit. It is connected in parallel. It usually has a high resistance so that it takes negligible current from the circuit.
An ammeter is a measuring instrument used to measure the current in a circuit. Electric currents are measured in Amperes, hence the name. The ammeter is usually connected in series with the circuit in which the current is to be measured.