CT9556 - SENSOR UNIT

Key Specifications2 isolated analog channels with BNC inputs 1 MS/s sampling rate, 12 bit resolution, DC to 50 kHz bandwidth RMS data logging with up to 1000 values per second Voltage measurement: 100 mV to 500 V, 12 ranges2 MWords internal memory per channel, removable memory card storage Typical ApplicationsCapture voltage drops, spikes, and transient power issuesDetect short voltage or current deviations over long periods using RMS logging Record inrush currents and motor control timing Diagnose PLC, relay, and control signal behavior Detailed Product OverviewThe MR8870 Memory Recorder is a compact, handheld data acquisition system designed for technicians and engineers who require high-speed, isolated waveform capture in the field. When configured as an RMS Recorder, the MR8870 calculates up to 1000 RMS values per second, allowing short voltage or current deviations to be detected even during extended monitoring. Equipped with two isolated analog channels with BNC inputs and four logic channels, the MR8870 enables simultaneous measurement of analog waveforms and digital signals. Each analog input supports direct voltage measurement up to 400 VDC and is isolated from earth up to 300 VAC/DC in CAT II environments.Waveform recording and RMS loggingThe MR8870 records waveforms with a maximum sampling rate of 1 MS/s, 12-bit vertical resolution and a bandwidth of DC to 50 kHz. Configurable trigger functions with adjustable pre-trigger settings allow event-based recording aligned with the measurement task, for example when capturing voltage or current transients, inrush currents or relay dropouts. When configured as an RMS Recorder, the MR8870 calculates up to 1000 RMS values per second based on high resolution sampling. This enables detection of short duration voltage or current deviations during extended monitoring periods without averaging them out. RMS values can be stored at user defined intervals together with minimum and maximum values for each interval. Current measurement with external sensors The MR8870 also measures current using external current clamps or sensors with a voltage output. AC current clamps with BNC connectors can be connected directly to the MR8870's analog inputs for portable industrial measurements. Compatible HIOKI Rogowski sensors support current measurements up to 5000 A, depending on the selected sensor. For higher accuracy or DC current applications, compatible current sensors with ME15W connectors can be used in combination with an external sensor unit for sensor power supply. The measurable current range and frequency response are defined by the selected external sensor, while the overall system bandwidth of the MR8870 is DC to 50 kHz. Logic inputs and probes The MR8870 provides four logic input channels for simultaneous recording of digital signals with analog waveforms. The logic inputs can also be used as trigger source or for time correlation of switching states with measured voltage and current signals. For low-voltage digital and contact signals, the Logic probe 9320-01 supports detection up to 50 V DC, including PLC outputs and open-collector signals, with pulse detection down to 500 ns. For relay drive and mains-level signals, the isolated Logic probe MR9321-01 enables detection of AC or DC signals up to 250 V and can be used for monitoring contactors, relay coils or power line interruptions.Memory, data handling and power supply The MR8870 provides 2 MWords of internal memory per channel for event-based waveform recording at the maximum sampling rate. For extended measurements or continuous logging, data can be stored on a removable memory card. When connected to a PC via USB, the MR8870 appears as a removable drive, providing direct access to files stored on the memory card. Recorded data can be analyzed using compatible software including the Dedicated Wave Processor Program for the 8870-20, WaveViewer or the 9335 Wave Processor. The compact housing weighs approximately 600 g and is designed for handheld use in field environments. The MR8870 can be powered using the included Z1005 AC adapter, an external DC supply or an optional battery pack. Battery operation enables up to two hours of autonomous measurement. The MR8870 is manufactured in Japan.

The MR8880 is a 4 channel portable data acquisition system (DAQ) with a maximum sampling rate of 1Msamples/s on all analog channels simultaneously. It has 4 analog direct input channels for voltages up to 600V and 8 logic channels.Technical Details: Complies CAT III 600V isolation for direct measure of 480V power line 4 complete isolated channels Operating temperature range of -10°C to 50°C Built to withstand mechanical shocks and vibrations PRESET function A memory capacity of 14bit × 1 M words/ch (1 word = 2 bytes)

The Hioki MR8875 Memory Recorder is a high-speed, multi-channel logger designed for long-term data recording and real-time waveform monitoring. It supports various input modules for mixed signal measurement, including voltage, temperature, strain, and CAN signals, with a sampling period as short as 2 µs. Its robust design is suitable for harsh environments, making it ideal for applications such as battery evaluation, motor testing, and power equipment analysis. Technical Details: Channels: Up to 60 channels with input modulesSampling Rate: 500 kS/sMemory Capacity: 32 MW (64 MB) Display: 8.4-inch TFT color LCD Storage: SD card, USB memory stick Dimensions: 298 mm × 224 mm × 84 mmWeight: 2.4 kg (excluding modules)

The CT6875 AC/DC Current Sensor is designed for accurate current measurements across a broad frequency range, from DC to 2 MHz (Model CT6875-01: DC to 1.5 MHz). With a rated current of 500 A, it is ideal for R&D, quality evaluation, manufacturing, and maintenance in industries such as wireless charging systems, inverter motors, PV power conditioners, and EV quick charging facilities. In combination with the Power Analyzer PW8001, the sensor allows for precise high-frequency and low power factor measurements. Technical Details: Rated Current: 500 A Frequency Bandwidth: CT6875: DC to 2 MHzBasic Accuracy: Amplitude: ±0.04 % rdg. ±0.008 % f.s., Phase: ±0.08° Maximum Conductor Diameter: 36 mm Maximum Rated Voltage to Ground: 1000 V CAT III Operating Temperature: -40°C to 85°C Input Impedance Requirement: 1 MΩ or higher Output Terminal: ME15W Cable length: 3mMore than specs – find more details here: Measure Power with Precision – Across All Applications

Product Description for CT6876 AC/DC Current Sensor The CT6876 AC/DC Current Sensor is designed for accurate current measurements with a broad frequency range from DC to 1.5 MHz. With a rated current of 1000 A, it is ideal for demanding applications in industries such as inverter motors, electric vehicles, and power electronics.The sensor offers excellent noise resistance and high precision, making it a top choice for high-current, high-speed measurements. When combined with Hioki's Power Analyzers, it ensures accurate power conversion efficiency measurements, especially in high-frequency environments. Technical Details: Model: CT6876 Rated Current: 1000 A Frequency Bandwidth: DC to 1.5 MHzBasic Accuracy: Amplitude: ±0.04% rdg. ±0.008% f.s. Phase: ±0.1° Maximum Conductor Diameter: 36 mm Maximum Rated Voltage to Ground: 1000 V CAT III Operating Temperature: -40°C to 85°CInput Impedance Requirement: 1 MΩ or higher Output Terminal: ME15W

The CT6872 is a high-precision AC/DC current sensor designed for detailed waveform observation and harmonic analysis. With a frequency range of up to 10 MHz, it is ideal for high-frequency power electronics testing. It supports automatic phase shift correction (APSC). Technical Details: Current Rating: 50 A AC/DC Frequency Range: DC to 10 MHz Accuracy: ±0.03% rdg, ±0.002% f.s. Maximum Conductor Diameter: 24 mm Operating Temperature: -40°C to 85°C Input Impedance Requirement: 1 MΩ or higherMore than specs – find more details here: Measure Power with Precision – Across All Applications

The CT6873A is an advanced current sensor that provides high-precision AC/DC current measurements for power analysis applications. Its wide frequency range and excellent phase accuracy make it suitable for complex waveform and harmonic studies. It supports automatic phase shift correction (APSC).Technical Details Current Rating: 200 A AC/DC Frequency Range: DC to 10 MHz Accuracy: ±0.03% rdg, ±0.002% f.s. Maximum Conductor Diameter: 24 mm Operating Temperature: -40°C to 85°C Input Impedance Requirement: 1 MΩ or higher

AC/DC precision current clamp with 500 A range and 500 kHz bandwidth for accurate current and power analysis in power electronics testing. HIOKI CT6844A available now.

AC/DC fluxgate current clamp with 500 A range and 200 kHz bandwidth for high-accuracy current measurement in power analysis applications. HIOKI CT6845A available now.

High-accuracy AC/DC current clamp with 1000 A range and 100 kHz bandwidth for precise power and waveform analysis. HIOKI CT6846A available now.

AC/DC precision current clamp with 20 A range and 2 MHz bandwidth for accurate current measurement in power electronics testing. HIOKI CT6841A available now.

AC/DC high-accuracy current clamp with 200 A range and 700 kHz bandwidth for precise power and waveform analysis. HIOKI CT6843A available now.

Ultra-small, zero-flux clamp-on AC/DC Current Probe using flux gate detection, high accuracy ±0.3 % rdg., wide temperature range -40 to 85 oC, measurable current from 100 µAup to 2 A, ME15W connector

The CT9904 connection cable is designed for reliable data transfer between Hioki sensors and measurement instruments, offering robust connections for accurate current readings. Technical Details: Length: 1 m Connectors: ME15W(m 12pin) / ME15W(w 12pin) Compatibility: Hioki current sensors

Ultra small zero flux clamp-on AC/DC Current Probe using flux gate detection, high accuracy ±0.3 % rdg., wide temperature range -40 to 85 oC, measurable current from 1 mAup to 20 A, ME15W connector

The L9217 is a connection cord with insulated BNC connectors at both ends. Technical Details: Length: 1.6 m Maximum Rated Voltage to Earth: CAT III 300V, CAT II 600VMaximum Rated Line Voltage: 300V Maximum Rated Current: 0.2A Compatible Hioki Products: VT1005 Voltage Divider, Memory Recorders and similar products.

The 9165 is a 1550 mm long BNC to BNC coaxial cable for reliable signal transmission in test and measurement applications. It features an RG-58A/U coaxial cable with 50 Ohm BNC connectors (BNCP-58A) at both ends and offers high signal integrity. Precision manufacturing makes it ideal for laboratory applications.Technical details: Cable type: RG-58A/U coaxialConnector type: BNC (BNCP-58A), 50 OhmLength: 1550 mm (+20 mm tolerance)Typical Applications Reliable signal transmission for testing and measurement

The CT9900 conversion cable allows for easy connection between Hioki current sensors and compatible data acquisition devices, ensuring stable signal transmission. Technical Details: Length: 240 mm Connectors: PL23(w 10pin) / ME15W(m 12pin) Compatibility: Hioki current sensors

AC Adapter, 100 V to 240 V AC, 50/60 Hz, for LR853x modules, P9000, SP700x, PW3365