Clamp Meter Fnirsi DMC-100 — Digital AC/DC Current Measurement

Fnirsi DMC-100 is a handheld digital clamp meter for universal electrical measurements. It performs AC and DC current and voltage measurements, resistance, capacitance, frequency and temperature readings, supports diode and continuity checks, and includes non-contact voltage (NCV) detection. The clamp design with a 25 mm jaw diameter and a 2.0" color TFT display makes the instrument suitable for field diagnostics, maintenance and general electrical work.

Advantages

The meter provides True RMS measurement with up to 10000-count resolution for accurate readings on nonlinear signals. Two independent measurement circuits allow simultaneous voltage and current measurement with automatic power calculation. A built-in 1500 mAh lithium battery with USB-C charging, a protected connector cap, a backlit color display and an integrated flashlight enable longer use and operation in low-light conditions. Data logging and graph functions store up to 30 result sets and allow viewing of the last 8 measurements.

Suitable for

• Field diagnostics and electrical troubleshooting
• Installation and maintenance of residential and commercial electrical systems
• Technicians and electricians performing AC/DC current checks
• Equipment inspection and preventive maintenance

Key specifications

• Display: 2.0" TFT color screen
• Clamp jaw diameter: 25 mm
• Power supply: 3.7 V lithium battery (1500 mAh), rechargeable via USB-C (5 V/1 A)
• Dimensions: 193 × 74 × 32 mm; weight: 194 g
• AC current range: up to 600.0 A; AC current accuracy: ±(2.5% + 10)
• DC current range: up to 600.0 A; DC current accuracy: ±(2.5% + 10)
• AC voltage range: up to 750.0 V; AC voltage accuracy: ±(1% + 3)
• DC voltage ranges: up to 999.9 V; DC voltage accuracy: ±(0.5% + 3)
• Resistance ranges: up to 99.99 MΩ; resistance accuracy: ±(1.5% + 3)
• Capacitance ranges: up to 99.99 mF; capacitance accuracy: ±(2.0% + 5) (additional ranges with ±(5.0% + 20) for largest ranges)
• Frequency range and accuracy: up to 9.999 MHz, ±(0.1% + 2)
• Temperature range: -55 °C to 1300 °C; temperature accuracy: ±(2.5% + 5)
• Functions: True RMS, NCV (non-contact voltage detection), diode test, continuity, phase/neutral test, data logging and graphing

How to use

Switch the meter to the required measurement function and, when measuring current, open the clamp and place it around a single conductor within the 25 mm jaw. For voltage, resistance, capacitance, frequency and diode/continuity checks use the provided test leads as indicated in the user manual. Use the NCV function to detect live voltage without contact. Charge the internal battery via the USB-C port and ensure the protective silicone cap is closed when not charging. Refer to the manual for measurement ranges, safety limits and correct probe connections.

Usage recommendations

Use the clamp meter for routine inspections, troubleshooting and maintenance. Ensure measurements are taken on single conductors for accurate current readings, observe safety procedures when working on live circuits, and consult the user manual for range selection and limits to avoid overload.