- 2 isolated analog inputs for safe measurement of mains voltage
- Oscilloscope-like waveform display with 1 MS/s sampling rate
- RMS recording with 1 ms interval for power line monitoring
- Real-time saving to CF card during measurement without interruption
- Compact and lightweight design for portable field use
- Setup Wizard for quick configuration and intuitive operation
- Synchronization of two MR8870 units for four-channel recording
- 4 logic channels for analyzing sequence control and breaker timing
- Supports a wide range of current clamps and differential probes
- Robust operation with battery, AC adapter, or external DC power supply
Applications
- Recording inverter switching and output waveforms
- Measuring motor start and inrush currents
- Analysis of EV and HEV startup currents
- Diagnostics of sequence controllers and production lines
- Monitoring RMS variations of AC mains voltage
- Breaker testing using time-correlated analog and logic inputs
- Portable oscilloscope for field troubleshooting in power systems
- Synchronized multi-channel recording of three-phase systems
The Hioki MR8870 is an ultra-compact two-channel memory recorder that combines oscilloscope functionality, RMS recording, and portable data logging in a single instrument. Its isolated inputs enable safe measurement of both mains voltage and sensitive control signals, while the high sampling rate of 1 MS/s allows the capture of fast transients and complex waveforms. Despite its small size, the instrument supports continuous recording with 1 ms resolution and real-time saving to a CF card during measurement, eliminating interruptions and reducing the risk of data loss.
The MR8870 is particularly suitable for field work thanks to its low weight, intuitive menu system, and built-in Setup Wizard that guides users through configuration. Real-time waveform display via the “Waveform Monitor” mode simplifies setup and troubleshooting. For analysis of sequence control, breaker operation, or complex automation systems, analog and logic signals can be recorded simultaneously. Two MR8870 units can also be synchronized via external trigger for four-channel measurements, making the instrument flexible for three-phase applications.
The instrument supports a wide range of Hioki probes, including differential high-voltage probes and AC/DC current clamps, enabling measurement of current, voltage, and high-frequency noise without direct contact. Using the included PC software, recorded waveforms can be analyzed, annotated, exported, and compiled into reports.
With its durable construction, flexible power options (AC adapter, battery pack, or external DC), and extensive functionality, the Hioki MR8870 is a powerful tool for engineers working in power systems, energy distribution, automotive testing, automation, and general industrial troubleshooting.
