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MSP430F67791A: MSP430F67791A - TIDMTHDREADING
Part Number: MSP430F67791A
HiI was testing the e-meter app code in MSP430F67791A based design and found voltage rms was reading proper but Fundmental RMS and Voltage THD measurement is fluctuating too much and not getting stable value(erratic readings)(Applied input was 240 V and 10% 3rd Harmonic). What could be the reason for non-consistence reading?Please resolve my query.Thanks,Santhosh
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Hello, Are you using our EVM430-F6779 or your own custom board? Have you modified the TIDM-THDREADING source code at all? Regards, James
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In reply to James Evans:
I am using our own custom board. I didn't modified any part of the code except metrology-template.h & metrology-calibration-template.h.
In reply to SANTHOSH V:
I have modified only default constants and ADC input. Files are attached, please have a look.
Vrms is proper, we face problem only with THD.
I have attached 2 files that contains measurement results with below inputs:
1. All three phases 240V, 10A, UPF, 50Hz, 10% 3rd harmonic in all three voltages.
2. All three phases 195V, 10A, UPF, 50Hz, No harmonic.
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