6 Performance Tests and Calibration168 Keysight U1253B User’s and Service GuideRecommended Test EquipmentThe test equipment recommended for the performance verification andadjustment procedures is listed below. If the exact instrument is not available,substitute with another calibration standard of equivalent accuracy.A suggested alternative method would be to use the Keysight 3458A 8½ – DigitDigital Multimeter to measure less accurate yet stable sources. The output valuemeasured from the source can be entered into the instrument as the targetcalibration value.Table 6-1 Recommended test equipmentApplication Recommended equipment Recommended accuracy requirementsDC voltage Fluke 5520A < 20% of U1253B accuracy specDC current Fluke 5520A < 20% of U1253B accuracy specResistance Fluke 5520A < 20% of U1253B accuracy specAC voltage Fluke 5520A < 20% of U1253B accuracy specAC current Fluke 5520A < 20% of U1253B accuracy specFrequency Keysight 33250A < 20% of U1253B accuracy specCapacitance Fluke 5520A < 20% of U1253B accuracy specDuty cycle Fluke 5520A < 20% of U1253B accuracy specNanosiemens Fluke 5520A < 20% of U1253B accuracy specDiode Fluke 5520A < 20% of U1253B accuracy specFrequency counter Keysight 33250A < 20% of U1253B accuracy specTemperatureFluke 5520A < 20% of U1253B accuracy specTM Electronics KMPC1MP(K-Type thermocouple extension) —Square wave Keysight 53131A and Keysight 34401A < 20% of U1253B accuracy specShort Pomona MDP-S –
