Technical data

Calibration Procedures 1
Performance Verification Tests
U1270 Series Service Guide 35
15
ACμA While the rotary
switch is in the position,
press the key once.
300 μA300 μA, 20 Hz - ±2.95 μA
300 μA, 45 Hz ±2.95 μA ±2.05 μA
300 μA, 65 Hz ±2.95 μA ±2.05 μA
300 μA, 1 kHz ±2.95 μA ±2.95 μA
3000 μA 3000 μA, 20 Hz - ±29.5 μA
3000 μA, 45 Hz ±29.5 μA±20.5 μA
3000 μA, 65 Hz ±29.5 μA±20.5 μA
3000 μA, 1 kHz ±29.5 μA±29.5 μA
16
DCmA Turn the rotary
switch to the position.
30 mA 30 mA ±0.065 mA ±0.065 mA
300 mA 300 mA ±0.65 mA ±0.65 mA
17
ACmA While the rotary
switch is in the position,
press the key once.
30 mA 30 mA, 20 Hz - ±0.295 mA
30 mA, 45 Hz ±0.295 mA ±0.205 mA
30 mA, 65 Hz ±0.295 mA ±0.205 mA
30 mA, 1 kHz ±0.295 mA ±0.295 mA
300 mA 300 mA, 20 Hz - ±2.95 mA
300 mA, 45 Hz ±2.95 mA ±2.05 mA
300 mA, 65 Hz ±2.95 mA ±2.05 mA
300 mA, 1 kHz ±2.95 mA ±2.95 mA
18
DCA
[8]
Turn the rotary
switch to the position.
3 A 3 A ±0.0100 A ±0.0100 A
10 A 10 A ±0.04 A ±0.04 A
[8] CAUTION: Connect the calibrator to the multimeter's A and COM terminals before applying the 3 A and 10 A input.
Table 1 - 2 Performance verification tests (continued)
Step Test function Range 5520 output Error from nominal 1 year
U1271A U1272A/
U1273A/U1273AX
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