Metex is largely defunct, but Mastech (which absorbed some Metex designs) may have legacy PDFs on their “Support” page.
Requires free membership but provides high-resolution scans of original documents, including calibration instructions.
The sigrok wiki provides a detailed overview of the hardware, including the RS232 connectivity and fuse ratings. Key Components & Parts (from the Service Parts List)
If you are looking for or a compatible RS232 cable , let me know so I can help you find them. metex m 4650cr pdf 12 hot
brand and was popular in the 1990s for its high resolution and early PC connectivity features. 📄 Manuals & Downloads
Up to 1000V DC and 750V AC across high-precision sub-ranges.
The Metex M-4650CR is likely a model of digital multimeter produced by Metex, a company known for manufacturing a variety of electronic test and measurement instruments. A document related to this device, such as a PDF manual or datasheet, might include: Metex is largely defunct, but Mastech (which absorbed
| Parameter | Value | | :--- | :--- | | | 1200 | | Data Bits | 7 | | Stop Bits | 2 | | Parity | None or Even (official docs are slightly ambiguous; 'None' is widely reported to work) |
The Metex M-4650CR is a testament to the quality and longevity of high-performance test equipment from the early 1990s. Its 4½-digit resolution, extensive measurement capabilities, and unique RS-232 interface for PC connection make it a powerful tool even by today's standards. This guide has provided you with all the core information, from technical specifications and a guide to the official manual, to tips on using its unique features like the Logic Test and setting up PC data logging.
The key phrase in the search term "metex m 4650cr pdf 12 hot" appears to point to . A review of the official Metex M-4650CR operating manual reveals that page 12 contains crucial information, including the pinout and wiring for the multimeter's RS-232 data interface, which is a core function of this model. Key Components & Parts (from the Service Parts
Plug the black lead into COM and red lead into the V/Ω terminal.
: 20,000 counts, offering significantly higher precision than standard 2,000- or 4,000-count budget meters.
: The meter streams a 14-byte ASCII string containing the function mode, polarity, measured value, and unit whenever the front-panel COMM switch is engaged. 📋 Comprehensive Technical Summary Parameter / Feature Operational Value Diagnostic Notes Max Display Count 20,000 Counts (4½ Digits) Ideal for precision calibration work DCV Input Impedance 10 Megohms (10MΩ) Outlined on Page 12 of the manual Common Failure Mode 80% Voltage Reading Deficit Caused by contamination or rotary switch corrosion Data Logging Support Supported via sigrok driver Requires RS232 to USB adapter connection