Calibration
Introduction 5
5-25
Table 5-12. Amplitude Verification on 20 Amp Range
6105A
Measured
Error (%)
Product
Specification
Measurement
Uncertainty
TUR
RMS Frequency
6105A
(99 %)
6100B
(99 %)
6105A 6100B
10 A DC ±0.0350 % ±0.0720 % ±0.0035 % 10:1 21:1
20 A 57 Hz ±0.0140 % ±0.0210 % ±0.0126 % 1.1:1 1.7:1
20 A 850 Hz ±0.0140 % ±0.0210 % ±0.0107 % 1.3:1 2.0:1
6 A
[1]
1083 Hz ±0.0687 % ±0.0687 % ±0.0188 % 3.7:1 3.7:1
6 A
[2]
2850 Hz ±0.0687 % ±0.0687 % ±0.0215 % 3.2:1 3.2:1
4 A
[3]
5643 Hz ±0.0770 % ±0.0770 % ±0.0179 % 4.3:1 4.3:1
[1] Fundamental 57 Hz, zero amplitude, 19
th
harmonic at 6 A
[2] Fundamental 57 Hz, zero amplitude, 50
th
harmonic at 6 A
[3] Fundamental 57 Hz, zero amplitude, 99
th
harmonic at 4 A
120 Amp Range
1. Set the DMM to the DCV function and the 2 V range.
2. Set the DMM ‘m’ store to the 100 A shunt correction factor.
3. Set the DMM ‘-c’ and ‘÷z’ stores to 0.4.
4. Turn on the ‘*m’, ‘-c’ and ‘÷z’, and % math functions on the DMM.
5. Set the 6105A range to 1 x Ext 20A.
6. Set the current and frequency of the 6105A to the values in Table 5-13 for the 60 A
verification point.
7. Set the DMM ‘-c’ and ‘÷z’ stores to 0.8.
8. Set the DMM to ACV function.
9. Set the current and frequency of the 6105A to the values in Table 5-13 for the two
100 A verification points.
10. Set the DMM ‘-c’ and ‘÷z’ stores to 0.288.
11. Set the current and frequency of the 6105A to the values in Table 5-13 for the two
36 A verification points.
12. Set the DMM to the 2 mV range.
13. Set the current and frequency of the 6105A to the values in Table 5-13 for the 24 A
verification point.
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