For the resistance test it is possible to perform it with four wires, with the two available DC sources, or with two wires,
using the 10 V measurement input. The following table lists the corresponding range and accuracy (the maximum
resistance is 20 kΩ):
Source
Resistance range
Resolution
Typical accuracy
Guaranteed accuracy
High current
400 A
4-wire
10 μΩ
100 μΩ
1 mΩ
10 mΩ
0.01 μΩ
0.1 μΩ
1 μΩ
10 μΩ
< 0.7%
< 0.5%
< 0.5%
< 0.5%
1.35%
1.10%
0.95%
0.95%
Low DC current
6 A
4-wire
100 mΩ
1 Ω
10 Ω
0.1 mΩ
1 mΩ
10 mΩ
< 0.3%
< 0.3%
< 0.2%
0.6%
0.6%
0.4%
DC voltage meter
2-wire
100 Ω
1 kΩ
20 kΩ
0.1 Ω
1 Ω
10 Ω
< 0.6%
< 0.5%
< 0.5%
1.2%
1.0%
1%.0
Table 37 - Resistance test: range and accuracy
The impedance test is performed applying high voltage and measuring the corresponding current. The following table
lists the range and accuracy (the impedance is 100 Ω, the maximum impedance is 2 MΩ):
HV
source
[V]
I output
[A]
Impedance
range
[Ω]
Resolution
[mΩ]
Typical accuracy
Maximum accuracy
%
%
%
%
500
0.5÷5
1,000
20
±0.25
±0.1
±0.5
±0.2
500
0.05÷0.5
10,000
200
±0.10
±0.1
±0.2
±0.2
1,000
0.5÷2.5
2,000
400
±0.25
±0.1
±0.5
±0.2
1,000
0.05÷0.5
20,000
2,000
±0.10
±0.1
±0.2
±0.2
2,000
0.05÷1.25
4,000
800
±0.25
±0.1
±0.5
±0.2
2,000
0.05÷0.5
40,000
2,000
±0.10
±0.1
±0.2
±0.2
2,000
0.001÷0.05
2 M
10
5
±0.15
±0.15
±0.3
±0.3
Table 38 - Impedance test: range and accuracy
The following table lists the range and tolerances for the short-circuit impedance test:
Measurement range
Digits No
Range
Maximum
Resolution
Accuracy
10 mH÷2 H
5
Self-adjusting
0.001 mH
1% of the reading,
±0.5 mH
Table 39 - Phase angle resolution and accuracy
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