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ES51932 Fiches technique(PDF) 11 Page - Cyrustek corporation |
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ES51932 Fiches technique(HTML) 11 Page - Cyrustek corporation |
11 / 35 page Ver. 1.2 10/05/27 11 ES51932 22,000 Counts Auto DMM 1.8 Frequency counter The time base of the frequency counter is derived from an external crystal oscillator by 4,000,000 Tcounter = Fosc where Fosc is the frequency of the crystal oscillator. Thus, the counter has a 1-second time base when a 4MHz oscillator is used. The frequency counter can select the proper range automatically or manually. Auto-range operation extends over seven decades, from 22.00Hz to 220.00MHz. The following table summarizes the full-scale range of the frequency counter. In frequency mode, press VAHz button switches the mode to/from duty cycle mode. Range Full Scale 2FR1 22.00Hz1 3FR2 220.0Hz1 FR3 22.000KHz FR4 220.00KHz FR5 2.2000MHz FR6 22.000MHz FR7 220.00MHz NOTE: 1In the range FR1~FR2, the maximum counting number is 2200 counts. 2In the Range FR1, ES51932 will show 0.00Hz if the input frequency is less than 2.00Hz. 3In the Range FR2 (manual mode), ES51932 will show 0.0Hz if the input frequency is less than 20.0Hz.. 1.8.1 Duty Cycle measurement The duty cycle measurement is available in frequency mode with VAHz operation. Press VAHZ key when frequency mode is in operation, the ES51932 will switch to duty cycle measurement mode. Press VAHz key again to switch to frequency measurement mode also. The duty cycle mode range is within 5.0% to 94.9%. The minimum resolution is 0.1%. If the source frequency duty cycle is smaller than 5.0%, the UL will be shown on the LCD display. If the duty cycle is larger than 94.9%, the OL will be shown on the LCD display. |
Numéro de pièce similaire - ES51932 |
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Description similaire - ES51932 |
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