OHM METERS
Test Instruments & Measuring Devices
1.
Rx = 0 W
D =30
30
1
2.
Rx = 5 W
D =
30
30
5
0.86
3.
Rx = 10 W
D =
30
30
10
0.75
4.
Rx = 15 W
D =
30
30
15
0.67
5.
Rx = 1 MW
D =
30
1 x 106
1 x 106
0.000001 approximately 0
Then find I by using:
I = DIm
1.
Rx = 0 W
I = (1)(300 x 106 )
300 µA full scale deflection
2.
Rx = 5W
I = (0.86)(300 x 106 )
258 µA
3.
Rx = 10W
I = (0.75)(300 x 106 )
225 µA
4.
Rx = 15W
I = (0.67)(300 x 106 )
201 µA
5.
Rx = 1 MW
I = (0)(300 x 106 )
0 µA zero deflection
ES-14
Page 18
Rev. 0