Definition of Indicating Intergrating and Recording Instruments
Indicating, Intergrating and Recording Instruments Measuring instruments (i.e. secondary instruments) may be classified according to their function as: 1. Indicating instruments 2. Integrating instruments 3. Recording instruments 1. Indicating instruments: “Indicating instruments are those which indicate the magnitude of an electrical quantity at the time when it is being measured.” Their indications are given by a pointer moving over calibrated dial. Example: Ordinary voltmeters, ammeters and wattmeter’s, etc. 2. Integrating instruments: “Integrating instruments are those which measure and register by a set of dials and pointer either the total quantity of electricity (In amp-hours) or the total amount of electrical energy (in watt-hours or kWh) supplied to a circuit in a given time.” Example: The ampere...