Modern PCs lack RS-232 ports. Using a high-quality FTDI-based USB-to-Serial converter is the "hottest" tip for getting data logging back online.
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Carbon tracks can become dirty, creating leakage resistance.
In electronics repair circles—such as community discussions on the EEVblog Forum — is frequently cited because it details the unit's input impedance characteristics and electrical specifications . 1. Input Impedance Parameters metex m 4650cr pdf 12 hot
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The Metex M-4650CR (also sold internationally under the badge) balances benchtop-level precision with handheld portability. Display Architecture :
is a 4½ digit (40,000 count) multimeter designed for accuracy and versatility. Unlike standard 3½ digit multimeters, the Modern PCs lack RS-232 ports
The PDF manual for the Metex M-4650CR is available from several online sources:
The service manual PDF shows the PTC, spark gaps, and transient suppression diodes. For a “hot” (live) 12V system, you need to know if the meter can survive a voltage spike (e.g., load dump in a car).
It sounds like you're looking for the manual or specific technical parts list. Based on official service documentation, here are the direct resources for that model: Manuals and Documentation This link or copies made by others cannot be deleted
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Measures voltage, current, resistance, capacitance, frequency, and logic levels. Metex M-4650CR Manual PDF: Where to Find It