Digital multimeter with data logging BM525s, memory logger 87000 records, TRMS, USB/RS232C 102082

Solving problems in difficult industrial conditions

In environments where electrical installations and automation require precise diagnostics, the Brymen BM525s multimeter offers a set of functions going beyond standard measurements. The device is designed with the detection of complex faults in power distribution, electromechanical equipment, and control systems in mind. A key element of its construction is True RMS technology with a bandwidth up to 20 kHz, allowing for reliable reading of RMS values even with distorted voltage and current waveforms. This ensures that engineers can be certain they are measuring actual power in circuits with inverters or motors, rather than just an approximate average value.

The large, dual LCD display with backlight enables simultaneous observation of two parameters or quick reading of results in bargraph mode (60 measurements per second). Such sampling speed is invaluable for catching transient disturbances or peak voltage values. Work safety is a priority here – the meter meets the CAT IV 1000V safety standard, meaning it can be safely used near main distribution boards and during measurements at building inputs. An additional safety feature for the user is the Beep-Jack™ function, which signals incorrect connection of leads to input jacks with an audible beep, minimizing the risk of device damage or electric shock during voltage measurement in a power socket.

Automation and advanced data logging

For professionals, time is money, which is why the BM525s is equipped with intelligent automation features. The AutoCheck™ mode automatically detects the signal type at the inputs and switches the meter between DC voltage, AC voltage, and resistance measurement, eliminating the need to manually select functions. Meanwhile, the LoZ (low input impedance) function allows for the elimination of ghost voltages – false readings resulting from induction in nearby wires, which is crucial when diagnosing control circuits. The meter also offers a CREST-MAX (PEAK HOLD) mode with a 1 ms sampling time, ideal for capturing short voltage surge pulses.

One of the most impressive features of this model is the built-in data logger. The device can store up to 87,000 single records or 43,500 records in dual-display mode. This allows for long-term monitoring of network parameters without the need for constant operator presence at the device. The collected data can then be transferred to a computer using the optional KIT BRUA-86X communication kit (USB/RS232C), facilitating report creation and trend analysis over time. MIN/MAX/AVG functions and relative measurement Δ further support rapid assessment of electrical system stability.

Measurement ranges and versatility of applications

The BM525s multimeter covers a wide spectrum of diagnostic needs thanks to a rich set of measurement ranges. The device measures AC/DC+AC True RMS voltage up to 1000 V and AC/DC+AC True RMS current up to 20 A, which is sufficient for most service and installation work. Resistance measurement precision reaches 60 MΩ, and capacitance up to 25 mF, making it useful also in precision electronics. The included thermocouple probe allows for temperature measurement in the range from -50°C to +1000°C (with two channels simultaneously), while the continuity test and diode test functions facilitate quick checking of connections and semiconductor components.

Key device capabilities include the CAT IV 1000V protection class ensuring safety when working in main distribution boards, and memory allowing storage of up to 87,000 single or 43,500 dual data records for long-term monitoring. The wide True RMS bandwidth reaching 20 kHz guarantees accurate measurements of distortions in AC power circuits. The device supports voltage measurement up to 1 kV and current up to 20 A in AC/DC/AC+DC versions, as well as resistance up to 60 MΩ and capacitance up to 25 mF. Accurate frequency measurement reaches 50 kHz, while the dual-channel temperature module operates in the range from -50°C up to +1000°C. Communication with a computer is possible via the USB/RS232C interface (KIT BRUA-86X kit required), and the dual LCD screen offers 9999 counts resolution along with a dynamic bargraph for better visualization of signal changes.

Thanks to the combination of high measurement performance, advanced safety features, and data logging capabilities, the BM525s is a versatile tool for every specialist dealing with