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U1272A bảng dữ liệu(PDF) 11 Page - Keysight Technologies |
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11 / 22 page Electrical Specifications Notes for DC specifications (previous page) 1. Notes for voltage specifications: – The accuracy of the 30 to 300 mV range is specified after the Null function is used to subtract the thermal effect (by shorting the test leads). – For Z LOW measurements, autoranging is disabled and the multimeter’s range is set to 1000 volts in the manual ranging mode. 2. Notes for resistance specifications: – Overload protection: 1000 Vrms for short circuits with < 0.3 A current. – Maximum open voltage is < +3.3 V. – Built-in buzzer beeps when the resistance measured is less than 25 Ω ± 10 Ω. The multimeter can capture intermittent measure- ments longer than 1 ms. – The accuracy of the 300 Ω to 3 kΩ range is specified after the Null function is used to subtract the test lead resistance and thermal effect (by shorting the test leads). – U1273AX only: The accuracy for all resistance ranges is specified after the Null function is used when measuring at temperatures below –20 °C. The Null function is used to subtract the test lead resistance and thermal effect (by shorting the test leads). – For the ranges of 30 MΩ and 100 MΩ, the RH is specified for < 60%. – The accuracy for ranges < 50 nS is specified after the Null function is used on an open test lead. – The temperature coefficient of the 100 MΩ and 300 MΩ range is 0.1 × (specified accuracy)/°C (from –40 to 18 °C or 28 to 55 °C). 3. Notes for current specifications: – Overload protection for 300 μA to 300 mA range: 0.44 A/1000 V; 10 × 35 mm 30 kA fast-acting fuse. – Overload protection for 3 A to 10 A range: 11 A/1000 V; 10 × 38 mm 30 kA fast-acting fuse. – Specification for 300 mA range: 440 mA continuous. – Specification for 10 A range: 10 A continuous. Add 0.3% to the specified accuracy when measuring signals > 10 to 20 A for 30 seconds maximum. After measuring currents > 10 A, cool down the multimeter for twice the duration of the measured time before proceeding with low current measurements. 4. Notes for diode specifications: – Overload protection: 1000 Vrms for short circuits with < 0.3 A current. – Built-in buzzer beeps continuously when the voltage measured is less than 50 mV and beeps once for forward-biased diode or semiconductor junctions measured between 0.3 V and 0.8 V (0.3 V ≤ reading ≤ 0.8 V). – Open voltage for diode: < +3.3 V DC. – Open voltage for Auto diode: < +2.5 V DC and > –1.0 V DC. 11 | Keysight | U1270 Series Handheld Digital Multimeters - Data Sheet |
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Mô tả tương tự - U1272A |
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