MR8848 Modules - Flexible Input and Output Units for High-Speed Recording

The 8966 Analog Unit is a 2-channel voltage input module for the memory recorders MR6000, MR6000-01, MR8847A, MR8848, MR8827, MR8740, MR8741 and MR8740T. It expands these instruments with two electrically isolated voltage input channels and is designed for high-speed, multi-channel measurements in development, testing and analysis applications. With a maximum sampling rate of up to 20 MS/s and a frequency bandwidth of DC to 5 MHz (–3 dB), the module is suited for capturing fast signal transitions and transient events in power electronics, control systems and general waveform analysis. Multiple measurement ranges up to 400 V DC enable flexible integration into various measurement environments. Channel-to-channel isolation allows safe parallel measurements at different potentials.Typical applications include high-speed voltage measurement, transient waveform capture, signal integrity analysis and validation of analog and control circuits.Technical Specifications2-channel isolated voltage inputInput connector: insulated BNCA/D resolution: 12-bitMaximum sampling rate: 20 MS/sFrequency bandwidth: DC to 5 MHz (–3 dB) Measurement accuracy: ±0.5% of full scaleMeasurement range: 5 mV to 20 V/div (12 ranges)Maximum allowable input: 400 V DC Compatible memory recorders: MR6000MR6000-01 MR8848MR8847AMR8827MR8740MR8741MR8740T

The U8975 4ch Analog Unit is a 4-channel voltage measurement module for the memory recorders MR6000, MR6000-01, MR8848, MR8827, MR8740, MR8741 and MR8740T. It enables simultaneous voltage measurement across four channels with isolated inputs and supports direct signal acquisition. The module provides measurement ranges from 4 V to 200 V full scale and supports AC voltage display up to 140 V rms using the memory function. Simultaneous sampling across all channels is performed at up to 5 MS/s with 16-bit A/D conversion. A frequency characteristic from DC to 2 MHz and integrated low-pass filters support detailed waveform analysis. Typical applications include multi-channel signal monitoring, analysis of control systems, evaluation of analog circuits and synchronized waveform acquisition in development and industrial environments. Technical specifications Channels: 4 (voltage measurement) Input: isolated BNC, 1 MΩ, 30 pF, DC/GND coupling Max. rated voltage to ground: 300 V AC/DC; max. allowable input: 200 V DCMeasurement range: 4, 10, 20, 40, 100, 200 V f.s. (6 ranges), AC display up to 140 V rms Sampling rate / resolution: 5 MS/s max (4-channel simultaneous sampling), 16-bit (1/32000 of range)Accuracy: ±0.1% f.s. (5 Hz filter, zero position included) Frequency characteristic / filters: DC to 2 MHz (−3 dB), low-pass 5 / 500 / 5 k / 200 kHz Compatible memory recorders MR6000, MR6000-01, MR8848, MR8827, MR8740, MR8741, MR8740T 

The U8978 4ch Analog Unit is a 4-channel voltage measurement module for the memory recorders MR6000, MR6000-01, MR8740T, MR8847A, and MR8848. It enables high-resolution multi-channel voltage measurement via four BNC input terminals with 16-bit A/D conversion, a measurement range starting from 100 mV f.s., and a sampling rate of up to 5 MS/s with simultaneous sampling across 4 channels. Typical applications include multi-channel measurement of low-voltage signals, current measurement in combination with suitable current sensors, and development of control systems for vehicle auxiliaries. In combination with the CT6711 Multi-Range Current Probe, the U8978 can also be used for current measurements from 1 mA to 50 A. It is also suitable for high-resolution acquisition of small current waveforms in low-power devices. Technical specifications Number of channels / measurement function: 4 (voltage measurement) Input: isolated BNC terminal, 1 MΩ, 30 pF, DC/GND coupling Maximum rated voltage to earth / maximum allowable input: direct input 30 V AC, 60 V DC; in combination with 10:1 Probe 9665: 300 V AC/DC (CAT II); maximum allowable input 40 V DC direct, 400 V DC with 9665Measurement range / resolution: 100, 200, 400 mV f.s., 1, 2, 4, 10, 20, 40 V f.s. (9 ranges), 16 bit (1/32000 of measurement range) Sampling rate / accuracy: 5 MS/s (simultaneous sampling across 4 channels), ±0.3% f.s. (with 5 Hz filter, zero position accuracy included) Frequency characteristics / filter: DC to 2 MHz (−3 dB), low-pass filter 5 / 500 / 5 k / 200 kHz Compatible memory recorders MR6000, MR6000-01, MR8740T, MR8847A, MR8848 

The 8968 High Resolution Unit is a 2-channel high-resolution voltage input module for the memory recorders MR6000, MR6000-01, MR8847A, MR8848, MR8827 and MR8740T. It expands the recorder with two electrically isolated voltage input channels optimized for precise and stable signal acquisition. The module features 16-bit A/D conversion and supports simultaneous sampling on both channels at up to 1 MS/s. The higher amplitude resolution, combined with the sampling rate, enables more detailed analysis of signal changes in both amplitude and time domains compared to standard analog input modules. With a frequency bandwidth of DC to 100 kHz (–3 dB), the unit is designed for detailed waveform analysis where high resolution is more critical than maximum speed. Twelve measurement ranges from 5 mV/div to 20 V/div allow accurate measurement of low-level signals as well as higher voltage inputs. The maximum allowable input voltage is 400 V DC between input terminals, with isolation up to 300 V AC/DC to ground. Typical applications include high-accuracy voltage measurement, analysis of low-level signals, evaluation of power supply stability, ripple and noise analysis, and detailed waveform analysis in research and development environments.Technical Specifications 2-channel isolated voltage input Input connector: insulated BNCInput impedance: 1 MΩ / 30 pF A/D resolution: 16-bitMaximum sampling rate: 1 MS/s (simultaneous sampling) Frequency bandwidth: DC to 100 kHz (–3 dB) Measurement accuracy: ±0.3% of full scaleMeasurement range: 5 mV/div to 20 V/div (12 ranges) Maximum allowable input voltage: 400 V DC Isolation to ground: 300 V AC/DC Compatible memory recordersMR6000MR6000-01MR8848MR8847AMR8827MR8740MR8741MR8740T

The 8972 DC/RMS Unit is a 2-channel DC and RMS voltage measurement module for the memory recorders MR6000, MR6000-01, MR8740T, MR8740, MR8741, MR8827, MR8847A and MR8848. It enables both instantaneous waveform measurement and RMS evaluation via two electrically isolated input channels.The module features a wide-bandwidth RMS measurement circuit that supports DC and AC signals from around 30 Hz up to 100 kHz without requiring external signal conditioning. With a measurement range from 5 mV to 20 V/div and 12 selectable ranges, it can capture everything from small signal details to higher voltages. Simultaneous sampling at up to 1 MS/s on both channels allows detailed waveform and RMS analysis.The high isolation rating of up to 300 V AC/DC to ground and maximum allowable input voltage of 400 V DC between input terminals ensures safe operation even in demanding electrical environments. RMS amplitude accuracy supports precise evaluation of both DC and AC components.Typical applications include comprehensive DC and AC voltage monitoring, RMS waveform analysis, verification of PWM and switching signals, and performance evaluation in power electronics and test bench environments.Technical SpecificationsRMS measurement bandwidth: DC, 30 Hz to 100 kHzMeasurement range: 5 mV/div to 20 V/div (12 ranges) Maximum sampling rate: up to 1 MS/s RMS amplitude accuracy: ±1 % f.s. Input connectors: Isolated BNC connector (input impedance 1 MΩ, input capacitance 30 pF) Low-pass filter: 5 Hz, 50 Hz, 500 Hz, 5 kHz, 100 kHz Maximum rated voltage to ground: 300 V AC/DC (CAT II)Maximum allowable input voltage between terminals: 400 V DCCompatible memory recordersMR6000MR6000-01MR8740TMR8740MR8741MR8827MR8847AMR8848

The U8974 High Voltage Unit is a 2-channel voltage measurement module for high-voltage signals for the memory recorders MR6000, MR6000-01, MR8848, MR8827, MR8740, MR8741 and MR8740T. It supports DC and RMS voltage measurement with selectable modes and enables direct input of high-voltage signals. The module provides measurement ranges from 200 mV/div to 50 V/div (DC) and 500 mV/div to 50 V/div (RMS) with a maximum input voltage of 1000 V DC and 700 V AC. Simultaneous sampling of both channels is performed at up to 1 MS/s with 16-bit A/D conversion. A frequency characteristic from DC to 100 kHz and integrated RMS measurement functions support analysis of voltage signals. Typical applications include measurement of high-voltage signals in power electronics, monitoring of power supply systems, and analysis of voltage waveforms in electrical systems. Technical specifications Number of channels: 2 (voltage measurement, DC/RMS selectable) Input: banana terminal, input impedance 4 MΩ, input capacitance 5 pF Measurement range: 200 mV/div to 50 V/div (DC), 500 mV/div to 50 V/div (RMS), 8 / 7 ranges Maximum input voltage: 1000 V DC, 700 V AC • Sampling rate: 1 MS/s Resolution: 16 bit (1/1600 of measurement range) Accuracy: ±0.25% f.s. (with 5 Hz filter)RMS measurement: ±1.5% f.s. (30 Hz to 1 kHz), ±3% f.s. (1 kHz to 100 kHz), response time 150 ms / 500 ms / 2.5 sFrequency characteristic: DC to 100 kHz (−3 dB)Input coupling: DC / GND Compatible memory recorders MR6000, MR6000-01, MR8848, MR8827, MR8740, MR8741, MR8740T 

The MR8990 Digital Voltmeter Unit is a 2-channel, 6.5-digit high-precision DC voltage measurement module for the memory recorders MR6000, MR6000-01, MR8740T, MR8740, MR8741, MR8827, MR8847A and MR8848. It enables high-accuracy DC voltage analysis in multi-channel recorder systems for industrial, energy and development applications. With a resolution of up to 0.1 µV and a sampling rate of up to 500 S/s, the unit enables highly stable DC voltage measurement across five selectable ranges from 100 mV to 1000 V full scale. Standard 4 mm banana input connectors allow robust and flexible connection in laboratory and validation setups.Typical applications include high-resolution DC monitoring, battery characterization, power rail stability analysis, calibration verification and long-term reference voltage measurement.Technical Specifications Channels / input: 2 (isolated, 4 mm banana) Measurement type: DC voltage, 6.5 digits Measurement range: 100 mV to 1000 V full scale (5 ranges) Resolution: up to 0.1 µVSampling rate: up to 500 S/sInput impedance: 100 MΩ (100 mV–10 V ranges), otherwise 10 MΩ Voltage limits: 500 V DC input; 300 V AC/DC to ground Basic accuracy: ±0.01% rdg. ±0.0025% f.s. (1000 mV range)Compatible memory recorders MR6000MR6000-01MR8740TMR8740MR8741MR8827MR8847AMR8848

The U8977 3ch Current Unit is a 3-channel current measurement module for the memory recorders MR6000, MR6000-01, MR8740T, MR8847A, and MR8848. It enables current measurement with optional Hioki current sensors. The module supports direct connection of compatible current sensors as well as connection via the optional CT9920 Conversion Cable. It also supports automatic recognition of directly connectable sensor models for automatic scaling setup and supplies sensor power directly from the current unit. Typical applications include 3-phase current measurement, inverter testing, and wideband current waveform acquisition in power electronics evaluation. Technical specifications Number of channels: 3 (current measurement with optional current sensor)Input: dedicated connector terminal (ME 15 W), input resistance 1 MΩ, GND common with the recorder main unit, DC/GND coupling Sampling rate / resolution: 5 MS/s (3-channel simultaneous sampling), 16-bit A/D conversion, 1/32000 of measurement rangeAccuracy: ±0.3% f.s. (with 5 Hz filter, add accuracy and characteristics of the current sensor used) Frequency characteristics / filter: DC to 2 MHz, ±3 dB; low-pass filter 5 / 500 / 5 k / 200 kHz Dimensions and mass: 106 mm W × 19.8 mm H × 196.5 mm D, 250 g Compatible memory recorders MR6000, MR6000-01, MR8740T, MR8847A, MR8848 (max. 3 modules/device) Compatible current sensors 9272-05, CT6830, CT6831, CT6833, CT6834, CT6841A, CT6843A, CT6844A, CT6845A, CT6846A, CT6847A, CT6862-05, CT6863-05, CT6872, CT6872-01, CT6873, CT6873-01, CT6875A, CT6875A-1, CT6876A, CT6876A-1, CT6877A, CT6877A-1, CT6904, CT6904A, CT6904A-1, CT6904A-2, CT6904A-3 Using the CT9920 Conversion Cable (PL14 to ME15W): CT7631, CT7636, CT7642, CT7731, CT7736, CT7742, CT7044, CT7045, CT7046 

The 8967 Temp Unit is a 2-channel temperature input module for the memory recorders MR6000, MR6000-01, MR8847A, MR8848, MR8827, MR8740, MR8741 and MR8740T. It expands these instruments with two thermocouple measurement channels and is designed for precise temperature monitoring in laboratory, development and industrial measurement applications. The module supports a wide range of thermocouple types including K, J, E, T, N, R, S, B and W, enabling flexible temperature measurements across various environments and applications. Reference junction compensation can be configured for internal or external operation, ensuring reliable temperature measurements under different installation conditions. Included two ferrite clamps help suppress high-frequency noise on thermocouple leads and improve measurement stability in electrically noisy environments. Typical applications include thermal testing, temperature monitoring in electronic systems, environmental testing and long-term temperature recording in research and development.Technical Specifications 2-channel thermocouple temperature input Supported thermocouple types: K, J, E, T, N, R, S, B, W Reference junction compensation: internal or external Data refresh rate: Fast approx. 1.2 ms / Normal approx. 100 ms / Slow approx. 500 ms Input resistance: ≥ 5 MΩ Maximum rated voltage to earth: 300 V AC/DC Compatible memory recorders MR6000MR6000-01MR8848MR8847MR8827MR8740MR8741MR8740T

The U8969 Strain Unit is a 2-channel module for strain measurement for the memory recorders MR6000, MR6000-01, MR8848, MR8827, MR8740, MR8741 and MR8740T. It enables measurement of strain signals using strain gauge bridge circuits with electronic auto-balancing. The module supports strain gauge transducers with bridge impedances from 120 Ω to 1 kΩ and a bridge voltage of 2 V. The measurement range covers ±10,000 µε with 16-bit resolution. Simultaneous sampling of both channels is performed at up to 200 kS/s. Integrated low-pass filters (5 Hz, 10 Hz, 100 Hz, 1 kHz) and a frequency characteristic from DC to 20 kHz enable measurement of static and dynamic strain signals. Typical applications include structural load testing, fatigue analysis, material testing, and analysis of mechanical deformation in multi-channel measurement systems. Technical specifications Number of channels: 2 (strain measurement, electronic auto-balancing) Measurement range: ±10,000 µε, 20 µε to 1000 µε/div, 6 rangesSampling rate: 200 kS/s (simultaneous)Resolution: 16 bit (1/1250 of measurement range) Accuracy: ±0.5% f.s. ±4 µε (5 Hz filter) Frequency characteristic: DC to 20 kHz (+1/−3 dB)Low-pass filter: 5 / 10 / 100 Hz, 1 kHz Bridge parameters: 120 Ω to 1 kΩ, 2 V ±0.05 VCompatible memory recorders MR6000, MR6000-01, MR8848, MR8827, MR8740, MR8741, MR8740T

The 8970 Freq Unit is a 2-channel frequency and pulse measurement module for the memory recorders MR6000, MR6000-01, MR8847A, MR8848, MR8827, MR8740, MR8741 and MR8740T. It enables accurate measurement of frequency, rotational speed (RPM), pulse width and duty ratio via two electrically isolated input channels. With a measurement range for pulse and frequency signals from very low frequencies up to 100 kHz, the module supports reliable acquisition of repetitive and pulse-based signals. In addition to frequency and RPM measurement, integration and pulse counting functions allow evaluation of accumulated events such as total rotations or pulses from flow meters, supporting detailed system analysis. The module also supports encoder signal measurement, allowing evaluation of rotational speed and position from incremental encoder outputs. A dedicated power frequency measurement mode enables precise monitoring of 50 Hz, 60 Hz and 400 Hz power systems. Isolation up to 300 V AC/DC to ground allows safe operation in electrically demanding environments. Flexible trigger settings ensure stable and reproducible measurements.Typical applications include high-accuracy voltage measurement, analysis of low-level signals, evaluation of power supply stability, ripple and noise analysis, and detailed waveform analysis in research and development environments.Technical Specifications2-channel isolated frequency and pulse input Input connector: insulated BNC Input impedance: 1 MΩ / 30 pFFrequency mode range: DC to 100 kHz (minimum pulse width 2 µs) Frequency accuracy: ±0.1 % f.s. Measurement functions: frequency, RPM, pulse width, duty ratio, integration, pulse counting Maximum rated voltage to earth: 300 V AC/DCCompatible memory recordersMR6000MR6000-01MR8848MR8847AMR8827MR8740MR8741MR8740T

The U8979 Charge Unit is a 2-channel acceleration measurement module for the memory recorders MR6000, MR6000-01, MR8848, MR8827, and MR8740T. It enables acceleration measurement with charge-output acceleration sensors and acceleration sensors with a built-in preamplifier. In addition, the module can be used for the measurement and recording of torque and vibration signals. The module provides one BNC input and one miniature connector for charge input per channel. It also supports TEDS-compatible sensors for automatic sensitivity setting. Typical applications include vibration measurement on machines and assemblies as well as frequency analysis of torque and vibration signals using the recorder’s FFT function. One example is the measurement of vibrations transmitted through the chassis to the motor housing using an acceleration sensor mounted on the chassis. Technical specifications Number of channels / measurement function: 2 (acceleration measurement) Input: BNC metal terminal, 1 MΩ, 200 pF max.; miniature connector (#10-32 UNF); input coupling AC/DC/GND; common GND for each channel Maximum rated voltage to earth / maximum input: 30 V AC or 60 V DC; maximum allowable voltage 40 V DC; maximum input charge ±500 pC or 50000 pC TEDS: IEEE 1451.1.4 Class 1 compatible (reading sensor information, automatic sensitivity setting) Measurement range: acceleration input 1 to 200 k (m/s²) f.s., 12 ranges × 6 types; charge input sensitivity 0.1 to 10 pC/(m/s²); preamplifier sensor input sensitivity 0.1 to 10 mV/(m/s²); voltage input 10 mV to 40 V f.s., 12 ranges Sampling rate / resolution: 200 kS/s, 16 bit (1/25000 of measurement range) Accuracy: amplitude accuracy ±2% f.s. for acceleration input; DC amplitude accuracy ±0.5% f.s. for voltage inputFrequency characteristics / filter: charge input 1 (1.5) to 50 kHz (−3 dB), low-pass filter 500 / 5 kHz; voltage input DC to 50 kHz (−3 dB) with DC coupling, 1 Hz to 50 kHz (−3 dB) with AC coupling, low-pass filter 5 / 500 / 5 kHz Other product-specific parameters: preamplifier supply 3.5 mA ±20%, 22 V ±5%; anti-aliasing filter with automatic cutoff frequency setting or OFF for FFT operation Compatible memory recorders MR6000, MR6000-01, MR8848, MR8827, MR8740

The 8973 Logic Unit is a logic signal measurement module for the memory recorders MR6000, MR6000-01, MR8740T, MR8740, MR8741, MR8827, MR8847A and MR8848. It enables acquisition and analysis of digital logic signals using HIOKI logic probes. The module provides four probe inputs. With HIOKI logic probes providing four measurement channels per probe, up to 16 logic channels can be realized per module.Multiple logic units can be installed simultaneously to expand the number of digital channels in the measurement system. The module uses mini-DIN connectors for HIOKI logic probes (sold separately), allowing simultaneous monitoring of multiple digital signals. The number of 8973 modules that can be connected depends on the memory recorder model: MR8827 supports up to 2 units, MR8848 up to 3 units, MR6000 up to 8 units, and MR8740T up to 3 units.Typical applications include digital timing analysis, monitoring of control logic, relay status tracking, and validation of embedded and industrial control systems.Technical Specifications Probe inputs: 4 (mini-DIN)Logic channels: 16 (4 probe inputs × 4 channels per logic probe) Compatible probes: HIOKI logic probes 9320-01, 9320-02 and 9320-03 (sold separately)Compatible memory recordersMR6000MR6000-01MR8740TMR8740MR8741MR8827MR8847AMR8848