FNIRSI FNIRSI-DMC-100 TRMS Clamp Meter with Graph Recording and 2-Inch TFT

Some electrical checks call for a focused current reading, others benefit from voltage, resistance, capacitance, and more in one instrument. The FNIRSI-DMC-100 combines clamp-based AC/DC current measurement with multimeter functions for a wider range of repair and troubleshooting tasks.

Its graph recording, rechargeable battery, and color display add practical tools for following readings and working through diagnostics.

Everyday use

For vehicle and household troubleshooting, the DMC-100 measures AC/DC current, AC/DC voltage, resistance, capacitance, frequency, and temperature. It also supports NCV detection, live-wire testing, continuity checks, and diode testing. That range makes it useful when a task moves between checking a circuit, examining a component, and tracing an electrical issue rather than relying on a single-purpose current tester.

The clamp jaws are for current measurement. Use the included test leads for voltage measurements. The package also includes two multimeter probes, a temperature probe, and a Type-C charging cable. For example, when investigating a vehicle electrical issue, a technician can use the clamp to check current draw, then switch to the leads to measure voltage at a circuit. For household appliance repair, the additional resistance and continuity functions help with component and connection checks.

What you’ll notice day to day

The 2-inch full-color TFT display shows readings in a clear on-screen format, with adjustable brightness and light or dark themes. It can display voltage and current simultaneously, making it easier to view both values during a diagnostic check without switching between separate screens. The 9,999-count TRMS meter also offers real-time graph recording, which helps make changing circuit behavior visible when tracking an intermittent fault. It stores eight sets of real-time data and 30 sets of historical records for reviewing measurements.

A built-in rechargeable 1,500mAh lithium battery and Type-C charging suit repeated use in a workshop or on service calls. Buyers often praise the display’s readability, the range of functions, and the convenience of recharging. Feedback on accuracy is mixed, so readings should be interpreted in the context of the measurement and task. When a changing signal is harder to catch in a single reading, would a visual record help you follow its behavior? The graph feature is designed for just that kind of troubleshooting.

What to know

This is a broad-function clamp meter rather than a basic tester focused on one measurement. Its combination of current clamping, lead-based measurements, temperature testing, and recorded data can support varied maintenance workflows. The display offers 10 brightness levels, and the interface can be set to a light or dark theme to suit different viewing conditions. For voltage checks, connect the test leads, the clamp jaws measure current only.

The included set contains the clamp meter, two multimeter probes, a temperature probe, and a Type-C charging cable. Together, these components support moving between current, voltage, and temperature checks as the job requires. Buyers’ comments also reflect differing experiences with measurement consistency, alongside positive remarks about ease of use and the bright screen.

Final verdict

The FNIRSI-DMC-100 is suited to technicians and DIY users who want one rechargeable instrument for AC/DC current checks and a range of electrical diagnostics. Graph recording, stored readings, the color TFT display, and multiple test functions give it a practical role in automotive, RV, household, and light industrial troubleshooting.