Greenlee DM-820A: High-Performance Multimeter for Shipboard Electrical Systems
Accurate and reliable electrical measurements are essential for maintaining shipboard power systems, ensuring operational safety, and preventing costly downtime. The Greenlee DM-820A is a true RMS digital multimeter designed to handle demanding environments, making it a practical tool for maritime electricians and maintenance crews. With advanced features such as peak hold, data recording, and high-voltage capability, it is well-suited for troubleshooting and monitoring electrical systems on ships.
** We strive for accuracy, but details may change, and errors are possible. Please verify specifications with the manufacturer or seller before purchasing. **
π·οΈ Pricing: New | Used | Bulk
1οΈβ£ Technical Specifications
General Features
- Measurement Functions:
- AC/DC Voltage: Up to 1000V
- AC/DC Current: Up to 10A
- Resistance: Up to 50 MΞ©
- Capacitance: Up to 10,000 ΞΌF
- Frequency: Up to 100 kHz
- Temperature: -40Β°F to 1832Β°F (-40Β°C to 1000Β°C) with included thermocouple
- Display & Interface:
- Large backlit LCD with dual 10,000-count display
- Analog bar graph for dynamic readings
- Durability & Safety:
- CAT IV 600V / CAT III 1000V safety rating for shipboard electrical work
- Impact-resistant casing with moisture protection for marine environments
- Power & Features:
- Data hold and peak hold functions for capturing rapid electrical events
- Auto-ranging for ease of use in variable conditions
- Relative mode for zeroing out residual measurements in shipboard systems
2οΈβ£ Performance & Features
- True RMS ensures precise measurements on shipboard electrical loads, including nonlinear power systems and generators
- Peak hold captures sudden electrical surges, critical for diagnosing transient faults in ship power grids
- Data logging capability allows technicians to track electrical trends over time, useful for preventive maintenance
- Backlit LCD and analog bar graph provide clear, real-time feedback even in low-light conditions
- Rugged design enhances durability against shipboard vibrations, salt air, and humidity
3οΈβ£ Benefits
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True RMS measurement for high-accuracy diagnostics on shipboard electrical systems
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Peak hold function captures transient electrical spikes, aiding in troubleshooting sensitive equipment
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Data recording allows for long-term monitoring of power systems, improving preventive maintenance
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High voltage and current measurement capabilities make it useful for a wide range of maritime applications
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Rugged, moisture-resistant design ensures durability in harsh marine environments
4οΈβ£ Drawbacks & Limitations
β οΈ No clamp meter function, requiring test leads for all current measurements
β οΈ No wireless connectivity, limiting remote monitoring capabilities
β οΈ Slightly larger than some compact multimeters, making it less convenient for fieldwork in confined spaces
5οΈβ£ Final Verdict
Final Score: 9.1/10
The Greenlee DM-820A is a high-performance multimeter designed for shipboard electrical diagnostics. With true RMS accuracy, peak hold functionality, and data recording capabilities, it provides reliable performance for troubleshooting and monitoring maritime power systems. While it lacks a clamp function and wireless connectivity, its robust construction and advanced features make it a valuable tool for ship maintenance professionals.
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