Keysight RP7970 Serie Manuel D'utilisation page 266

6 Verification and Calibration
Verification Setups
Test Considerations
For optimum performance, all verification and calibration procedures should comply with the
following:
Ambient temperature is stable, within 23 °C ±2°C.
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Ambient relative humidity is less than 80%.
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30 minute warm-up period before verification or adjustment.
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Cables as short as possible, twisted or shielded to reduce noise.
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266 Keysight RP7970 & RP7980 Series Operating and Service Guide