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DMG300 – MOD LCD MULTIMETER EXP OPTIC I/F
Lovato DMG300 expandable multifunction digital multimeter with 128 × 80 pixel graphic LCD, True RMS measurement, 31st-order harmonic analysis and support for EXM expansion modules.
£476.04
Why Choose the Lovato DMG300 Digital Multimeter?
The Lovato DMG300 is an expandable multifunction digital multimeter and electrical network analyser designed for comprehensive monitoring of low-voltage, medium-voltage and high-voltage electrical systems. Its compact DIN rail format combines advanced measurement functions, harmonic analysis and flexible expansion capabilities within a four-module housing.
A clear 128 × 80 pixel graphic LCD provides convenient access to voltage, current, power, energy, frequency, power factor, demand and power-quality measurements. True RMS measurement and gapless sampling help deliver dependable readings in industrial networks containing motors, variable speed drives, switching loads and other non-linear equipment.
The DMG300 includes an optical infrared interface for connection to optional Lovato EXM expansion modules. This modular design allows communication ports, digital inputs, digital outputs and analogue functions to be added according to the requirements of the installation, making the instrument suitable for both standalone monitoring and integrated energy-management systems.
Key Advantages
- Expandable multifunction electrical network analyser.
- High-resolution 128 × 80 pixel graphic LCD.
- Measures voltage, current, power, energy and power-quality values.
- Advanced harmonic analysis up to the 31st harmonic order.
- Compatible with external 1 A or 5 A current transformers.
- Optical infrared interface for optional Lovato EXM modules.
- Compact four-module format for standard DIN rail mounting.
- Class 0.5S active energy measurement accuracy.
Key Features
- Lovato DMG series expandable digital multimeter.
- 128 × 80 pixel graphic LCD display.
- White backlighting with four grey levels.
- Four-key membrane keypad for configuration and navigation.
- True RMS voltage and current measurement.
- Active, reactive and apparent power measurement.
- Active and reactive energy metering.
- Frequency, power factor and phase asymmetry monitoring.
- Individual harmonic analysis up to the 31st order.
- Waveform and trend graph display functions.
- Programmable alarms, counters and hour meters.
- Expandable through optional EXM communication and I/O modules.
- Multilingual interface for convenient commissioning.
Expandable Monitoring for Complex Electrical Networks
The Lovato DMG300 provides detailed visibility of electrical network performance through instantaneous, average, minimum, maximum and maximum-demand measurements. Its harmonic analysis functions help engineers identify waveform distortion caused by variable speed drives, power supplies and other non-linear loads.
Optional EXM modules allow the DMG300 to be adapted for different applications without replacing the base instrument. Depending on the selected module, users can add RS485, Ethernet or other communication options alongside programmable digital and analogue inputs and outputs.
Typical Applications
- Industrial switchboards and distribution panels.
- Motor control centres.
- Manufacturing and process-control installations.
- Commercial building energy monitoring.
- Generator and transformer monitoring.
- Power-quality and harmonic analysis.
- Energy-management and supervisory systems.
- Data centres and critical electrical infrastructure.
Technical Specifications
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| Device Type | Energy analyser | |
|---|---|---|
| Manufacturer | Lovato Electric | |
| Series | DMG Digital Multimeters | |
| Model | DMG300 | |
| Product type | Expandable multifunction digital multimeter | |
| Installation type | 35 mm DIN rail | |
| Housing width | Four DIN modules, 72 mm | |
| Display | 128 × 80 pixel graphic LCD | |
| Display backlight | White with four grey levels | |
| Measurement method | True RMS | |
| Auxiliary supply | 100–240 V AC / 110–250 V DC | |
| Auxiliary supply frequency | 45–66 Hz | |
| Current transformer input | External CT, 1 A or 5 A secondary | |
| Voltage inputs | Four | |
| Current inputs | Three | |
| Active energy accuracy | Class 0.5S, IEC/EN 62053-22 | |
| Reactive energy accuracy | Class 2, IEC/EN 62053-23 | |
| Harmonic analysis | Up to the 31st harmonic order | |
| Sampling frequency | 6400 Hz | |
| Integrated communication port | No | |
| Expansion interface | Optical infrared interface for EXM modules | |
| Expandable | Yes | |
| Front protection rating | IP40 | |
| Terminal protection rating | IP20 | |
| Dimensions (H × W × D) | approximately 90 × 72 × 58 mm | |
| HS Code | 90303100 |
Frequently Asked Questions
What is the Lovato DMG300 used for?
The DMG300 is used to measure and analyse electrical parameters including voltage, current, power, energy, frequency, power factor, demand and harmonic distortion.
Is the Lovato DMG300 expandable?
Yes. The DMG300 includes an optical infrared interface that supports optional Lovato EXM expansion modules for communication, digital I/O and additional functions.
Does the DMG300 have built-in RS485 communication?
No. The base DMG300 does not include an integrated communication port, but RS485 and other connectivity options can be added using a compatible EXM expansion module.
Which current transformers can be used with the DMG300?
The instrument is suitable for external current transformers with either a 1 A or 5 A secondary output.
Can the DMG300 perform harmonic analysis?
Yes. The DMG300 supports individual harmonic analysis up to the 31st harmonic order, helping users evaluate voltage and current waveform distortion.
Trusted Electrical Analysis for Industrial Systems
Lovato DMG digital multimeters are used by panel builders, electrical engineers and facility managers to provide accurate network monitoring, flexible system integration and dependable energy analysis across industrial and commercial installations.
