Includes a bi-directional RS232 serial interface, allowing users to log data directly to a PC. Detailed wiring diagrams for the interface can be found on sigrok .
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Long-term users have reported calibration drift over decades, often fixed by adjusting internal trimmers. metex m 4650cr pdf 12 hot
For protection, it uses a 2A/250V fast-blow fuse (5x20mm) for the mA range; note that the 20A range is typically unfused. Includes a bi-directional RS232 serial interface
(like measuring 12 V in a hot circuit with live power), reply with your exact need (e.g., “How to measure 12 VAC in an energized panel using the M-4650CR”), and I’ll write a detailed step‑by‑step safety and usage post for that scenario. reply with your exact need (e.g.