Many bench multimeters have two fuses: one for the mA/uA input and one for the 10A/20A input. If you try to measure 12A on a 400mA fused port, the meter explodes (or silently melts). The PDF tells you exactly which fuse to use (e.g., F12AH250V).
Let’s analyze the search keyword’s components to understand user intent.
The “CR” suffix often denotes an enhanced version with improved current measurement ranges or better temperature stability.
The Metex M-4650CR is a 20,000-count, 4½-digit digital multimeter (DMM) known for its RS232 connectivity and high precision. It was also sold under the brand name Voltcraft M-4650CR. Key Specifications & Features
Measurement Capabilities: DC/AC Voltage, DC/AC Current, Resistance, Capacitance, Frequency, Diode Test, Continuity, and Transistor hFEh sub cap F cap E end-sub measurement.
Display: 4½-digit LCD with a 41-point analog bar graph for observing rapid signal changes. Input Limits: Maximums of metex m 4650cr pdf 12 hot
Special Functions: Data-Hold, Max/Min-Hold, and Relative offset (REL) mode. Safety & Operating Tips
20A Warning: The 20A terminal is unfused. To prevent injury or device damage, do not exceed 20A and only use it in circuits protected by external breakers. Terminal Connections: Black Lead: Always connect to the COM terminal. Red Lead: Connect to V/ Ωcap omega
for voltage, resistance, and frequency, or to the A or 20A jacks for current.
Range Selection: Always set the function switch to the desired range before connecting to the circuit. Avoid turning the switch while the meter is under load.
Logic Testing: This model includes a specific logic test function for TTL/CMOS levels. Reference Manuals (PDF) Many bench multimeters have two fuses: one for
You can find full digitized guides and technical sheets at the following sources:
Mikrocontroller.net (Direct PDF): Full 32-page operating manual including measuring instructions.
Internet Archive (Service Manual): Contains internal parts lists, schematics, and service data from 1992.
Scribd (Operating Manual): Alternative high-quality digital copy. Understanding "12 Hot"
The term "12 hot" is likely a reference to Page 12 of the manual, which specifies the input impedance as a stable It was also sold under the brand name Voltcraft M-4650CR
for all DC voltage ranges. If your meter shows unstable readings or is "running hot" (drifting) at this stage, it often indicates internal contamination, leaked battery juice, or a dirty range switch. METEX-4650CR.pdf - Mikrocontroller.net
This is the most interesting part. The Metex M 4650CR does not have a model variant called “12.” Instead, there are three likely interpretations:
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:
If you're looking for a specific PDF related to the Metex M-4650CR, here are some steps you can take: