Indicating instruments are those which indicate the magnitude of the quantity being measured at that time.These indications are given by pointers moving over calibrated scales.Instruments like ammeters,voltmeters,watt meters,etc.belong to this class.
Recording instruments are those which give a continuous record of the variation of the quantity,such as current voltage or power over a selected period of time.The moving system of the instrument carries an inked pen which rests lightly on a chart or graph sheet carried by a revolving drum moves at a uniform speed in a direction perpendicular to the direction of the deflection of the pen.The path traced out by the pen on the sheet of paper gives a continuous record of the variations in the quantity being recorded.Recording voltmeters are in common use to record the variation of voltage by the suppliers at the terminals of the consumers during 24 hours in case of their complaints of low voltage.
Integrating instruments register by a set of dials and and pointers either total ampere hours (Ah) or the total amount of electrical energy (kWh) supplied to a circuit in a given time.Household energy meter is an integrating instrument. Ampere hour meter is another example of integrating meter.
Recording instruments are those which give a continuous record of the variation of the quantity,such as current voltage or power over a selected period of time.The moving system of the instrument carries an inked pen which rests lightly on a chart or graph sheet carried by a revolving drum moves at a uniform speed in a direction perpendicular to the direction of the deflection of the pen.The path traced out by the pen on the sheet of paper gives a continuous record of the variations in the quantity being recorded.Recording voltmeters are in common use to record the variation of voltage by the suppliers at the terminals of the consumers during 24 hours in case of their complaints of low voltage.
Integrating instruments register by a set of dials and and pointers either total ampere hours (Ah) or the total amount of electrical energy (kWh) supplied to a circuit in a given time.Household energy meter is an integrating instrument. Ampere hour meter is another example of integrating meter.
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