MEASUREMENT OF ELECTRICAL QUANTITIES

Task 1. Get acquaintance with the electric measuring instruments

1.1. Get acquaintance with the devices and put down characteristics of ammeter and voltmeter into tables 3 and 4.

1.2. Calculate the scale factor for all measurement ranges of the electrical devices.

Enter the results into table 1; 2.

1.3. Determine measurements absolute error using the accuracy class and measurement range of electrical devices according to the formulas:

Enter the results into table 1, 2.

Table 1

Ammeter	Measurement range Imax, A	Amount of pitches N, pitch.	Scale factor C, A/pitch	Accuracy class %	Absolute error DI, A	Ammeter resistance RA, W

Date: 2015-01-12; view: 1137