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ES51922 датащи(PDF) 7 Page - Cyrustek corporation |
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ES51922 датащи(HTML) 7 Page - Cyrustek corporation |
7 / 35 page Ver. 3.2 10/06/23 7 ES51922 22,000 Counts Auto DMM 1.1.2 CE selection ES51922 has a CE selection feature archived by configuring a CESEL pin. If pin CESEL is connected to V-, ES51922 will have a 610.0V overflow level in DCV and ACV ranges. If pin CESEL is connected to DGND, the overflow level will be set to 1010V. When it is floating, the overflow level is set to 1500V in DCV mode and 1010V in ACV mode. The meter will show OL when the measuring signal reaches the overflow level. The configuration of CESEL is listed below. CESEL DCV ACV V- 610.0 610.0V DGND 1010.0V 1010.0V Floating 1500.0V 1010.0V 1.1.3 HCF signal detection ES51922 provides detection of high-crest-factor (HCF) signal in ACV mode. When this function is enabled, ES51922 senses the signal and determines it as HCF if the Vpp is large enough. Once the signal is determined as HCF, ES51922 will jump up one measuring range regardless of current measurement value. It takes 60ms to jump one range up. The jumping up process will continue until the maximum range is reached. With HCF detection, a more accurate result could be obtained. For example, when a input signal with Vpeak=240V, Vrms=40V(CF=6) was applied, traditional DMMs might stay at 22.000V range but shows counts with the amount of error up to 10% or even bigger. The error rises from limited input/output swing at internal ADC. With HCF detection, DMM will stay at 220.00V and exhibits more accurate results. In addition to accuracy improvement, HCF will speed up the measuring process for high voltage signals. For example, a 500Vrms is applied, ES51922 will take about 180ms (3 HCF jumps) to enter 1000.0 V range. And it takes 1 or 2 measuring processes to obtain the stable result. Thus a stable LCD reading could be obtained within 1 sec. |
Аналогичный номер детали - ES51922 |
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Аналогичное описание - ES51922 |
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