Performance Test 4
U3402A User’s and Service Guide 69
Configuration: 4- wire W
1 Select the resistance function.
2 Select each range in the order shown in Table 4- 5. Provide the resistance
value indicated. Compare measurement results to the appropriate test
limits shown in Table 4- 5. (Be certain to allow for appropriate source
settling.)
Function Reading rate Input Range Error from nominal
one year
2-wire W Medium 360.00 W 400 W
±0.41 W
[1]
3.6000 kW 4 kW
±3.2 W
[1]
36.000 kW 40 kW
±25 W
[1]
360.00 kW 400 kW ±250 W
3.6000 MW 4 MW ±5.7 kW
20.000 MW 40 MW ±303 kW
200.00 MW 300 MW ±10.05 MW
Notes:
1 Specifications are for 2-wire ohms function using the Rel operation enabled to eliminate
lead resistance.
Table 4 - 5 4-wire W verification test
Function Reading rate Input Range Error from nominal
one year
4-wire W Slow 0.000 W 120 W
±8 mW
[1]
0.00000 W 1.2 kW
±50 mW
[1]
0.0000 W 12 kW ±0.5 W
0.000 W 120 kW ±5 W
0.00000 W 1.2 MW ±50 W
0.0000 W 12 MW ±0.5 kW
0.000 W 120 MW ±8 kW
Table 4 - 4 2-wire W verification test