User manual

1 Calibration Procedures
Performance Verification Tests
14 U1271A/U1272A Service Guide
1000 V 1000 V, 45 Hz N/A ±9.5 V
1000 V, 65 Hz N/A ±9.5 V
1000 V, 1 kHz N/A ±14.0 V
1000 V, 5 kHz N/A ±19.0 V
7
DCmV
[1]
Turn the rotary
switch to the / position.
30 mV 30 mV N/A ±0.035 mV
–30 mV N/A ±0.035 mV
300 mV 300 mV ±0.20 mV ±0.20 mV
–300 mV ±0.10 mV ±0.10 mV
[1] The accuracy is specified after the Null function is used to subtract the thermal effect (by shorting the test leads) before
measuring the signal.
8
AC+DCmV Turn the rotary
switch to the position, and
press the key twice.
30 mV 30 mV, 20 Hz N/A ±0.235 mV
30 mV, 45 Hz N/A ±0.200 mV
30 mV, 65 Hz N/A ±0.200 mV
30 mV, 1 kHz N/A ±0.235 mV
30 mV, 5 kHz N/A ±0.325 mV
30 mV, 20 kHz N/A ±0.340 mV
30 mV, 100 kHz N/A ±1.090 mV
300 mV 300 mV, 20 Hz N/A ±2.35 mV
300 mV, 45 Hz N/A ±2.00 mV
300 mV, 65 Hz N/A ±2.00 mV
300 mV, 1 kHz N/A ±2.35 mV
300 mV, 5 kHz N/A ±3.25 mV
300 mV, 20 kHz N/A ±3.40 mV
300 mV, 100 kHz N/A ±10.90 mV
Table 1 - 2 Functional Test
Step Test function Range 5520 output
Error from nominal 1 year
U1271A U1272A
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