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ES51968 Datasheet(PDF) 10 Page - Cyrustek corporation |
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ES51968 Datasheet(HTML) 10 Page - Cyrustek corporation |
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10 / 33 page  v2.5 09/04/14 10 ES51968(6600counts) Dual Display/Inrush 2.4 Current measurement for clampmeter ES51968 has 2 automatic and 4 manual current measurement modes for Clampmeter. The following table summarizes the full-scale range of each mode. When ES51968 operate in the automatic mode1&2, it takes high input from IVSH/IVSL (higher range/lower range), low input from SGND and reference voltage from VR. When ES51968 operates in the manual mode1~4, It takes high input from ADP, low input from SGND and reference voltage from VA+ and VA-. Mode FC1~4 1VBAR Full Scale Input Terminal Automatic1 1,1,0,1 0 660.0A / 6600A IVSL/IVSH V.S. SGND (66mV) Automatic2 1,1,1,1 0 66.00A / 660.0A IVSL/IVSH V.S. SGND (66mV) Manual1 1,1,0,0 X 6.600A ADP V.S. SGND (660mV) Manual2 1,0,0,0 X 66.00A ADP V.S. SGND (660mV) Manual3 1,0,1,0 X 660.0A ADP V.S. SGND (660mV) Manual4 1,0,0,1 X 6600A ADP V.S. SGND (660mV) Note: 1. Connect VBAR to V- will disable the “µ2” / ”m2” symbol on LCD panel. Inrush mode could be active when VBAR=0. 2. In DC current modes for clampmeter, ES51968 provides Zero function for offset removing. 2.5 Low pass filter (LPF) mode for ACA/ACV mode A 3rd order low-pass filter with is built in ES51968. The LPF mode is active automatically when the input AC frequency of voltage or current is less than 500Hz. That means if the frequency is lower, the LPF mode (3dB BW = 7.5kHz typ.) will be helpful to filter-out the high frequency noise of the main signal. When LPFOFF (pin 114) is pulled to V-, the LPF mode will be disabled always. For Inrush mode is active, the auto LPF is active always even LPFOFF is enable. |
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