High-performance digital multimeters deliver enhanced precision and speed

Telonic Instruments introduces the newly launched Siglent SDM4000A Series High-Performance Digital Multimeters in the UK. SDM4000A Series 5½-Digit and 6½-Digit Digital Multimeter with enhanced precision and speed.

In the automatic production lines where speed drives profitability, the digital multimeter as core equipment in automated testing directly impacts system efficiency. On April 16, 2025, Siglent launched the SDM4000A series. With 2,200,000 counts, a fast reading rate of 50,000 readings/s, a minimum sampling interval of 20µs, 11 measurement functions, and a touchscreen with an intuitive interface, the device elevates individual product testing efficiency and improves overall production line performance in accuracy-driven automated environments.

The new series offers 5½-digit (220,000 counts) and 6½-digit resolution (2,200,000 counts) with a full-scale display range from -2,199,999 to +2,199,999. Its excellent performance provides precise capture of subtle current variations and large voltage fluctuations.

The SDM4055A series attains a maximum reading rate of 4,800 readings/s, while the SDM4065A series supports up to 50,000 readings/s. Both models provide adjustable measurement speeds (fast/medium/slow). The SDM4065A sampling interval can be precisely configured from 0.001 PLC to 1,000 PLC (Power Line Cycle), allowing superior performance in high-speed data acquisition and micro-variation monitoring – ideal for applications needing precise measurements.

The series provides constant-rate sampling, enabling real-time monitoring, and supports continuous data logging for up to 100 hours with 2GB internal storage, ideal for long-term trend analysis.

The Digitizer Function on the DM4065A outperforms oscilloscopes and spectrum analysers in high-precision, low-frequency sampling and is particularly suitable for audio signal digitisation.

SDM4000A supports five operations: statistics, limits, dBm, dB, and relative measurements. It rapidly calculates max/min, average, peak-to-peak, standard deviation, and sample count while allowing pass/fail testing via preset thresholds. Voltage-to-power conversion, dB-based relative measurements, and deviation analysis further improve versatility.

The series offers four modes: Numeric for instant clarity, Histogram for data distribution analysis, Trend Chart for dynamic data pattern observation and trend prediction, and Bar Chart for cross-condition comparisons and rapid analysis of variations and patterns under different conditions, empowering users to visualise and analyse data with deeper insights.

After the readings stabilise, the multimeter buzzer sounds and displays the results automatically, retaining the latest eight readings for users to compare and refer to. Users can access historical data at any time for in-depth analysis of equipment performance or parameter changes, and the displayed data can be cleared with a single click.

The series features exceptional storage and retrieval capabilities. The SDM4055A series is equipped with a 512MB RAM and a 256MB NAND - Flash. The SDM4065A series can save up to two million readings. Users can easily manage instrument parameter files in the internal and external USB storage areas. It supports storing various types of files, such as reading points, pictures, and CSV/XML files. Users can create folders, save screen captures, copy, rename, and delete files, allowing efficient data management.

The series integrates a USB Host, USB Device, and LAN interfaces, with an optional USB-GPIB module. It supports standard SCPI remote control commands, PC-based software, and compatibility with the latest mainstream multimeter command sets. Its embedded web server allows direct remote control and programming via a browser, fulfilling diverse communication and automation needs.

The SDM4000A high-speed 5½-digit and 6½-digit multimeters strike a balance between speed, accuracy, and stability. Whether applied in automated control system testing, power engineering, electronics manufacturing and repair, telecommunications and networking, or scientific research and education, the series supplies a new measurement experience for engineers, allowing more precise and efficient testing.