A Current Meter is a specialized instrument designed to measure and digitally display electrical current values. Its operation centers on precision current sensing and analog-to-digital conversion. For DC current, it typically uses a precision shunt resistor; the current flow creates a small proportional voltage drop across this resistor, which is then amplified and converted by a high-resolution ADC into a digital value. For AC measurements, it often employs current transformers or Hall-effect sensors to obtain a signal representing the current, which is then conditioned and digitized. True-RMS conversion is utilized for accurate AC measurement of non-sinusoidal waveforms.
Product Features
1. High Accuracy and Clear Display: It provides precise current readings with resolutions down to milliamp levels, presented on an easy-to-read digital display (LCD/LED), eliminating parallax errors inherent in analog meters.
2. Versatile Input and Programmability: These meters support various input types (DC, AC RMS) and wide current ranges. Many are programmable for specific input scales (e.g., 0-5A DC, 0-1A AC) and can display engineering units, offering great flexibility.
3. Isolated Operation and Compact Design: They feature electrical isolation between the current-carrying input circuit and the low-voltage display/logic section, enhancing safety. Their standardized, compact form factor allows for easy integration into control panels and system enclosures.
Common Applications
Current Meter are essential for monitoring and control across numerous fields:
1. Power Supplies and Battery Chargers: Precisely displaying output or charging current.
2. Industrial Motor Control Panels: Monitoring motor load current to prevent overloads.
3. Renewable Energy Systems: Measuring current from solar panels or wind turbines.
4. Laboratory Test Benches and HVAC Control Systems.
