CURRENT UNIT 8971

Dedicated Current Input Module Capable of Supplying Power to Current Sensors

Key Features

  • Clamp connection, up to 500 A AC/DC, automatic sensor identification, easy operation
  • 2 channel input
  • From low to high frequency, wide bandwidth RMS rectifier installed (DC, or 30 Hz to 10 kHz)
  • Monitor instantaneous waveforms without the need to pass through the rectifying circuit
  • High 12-bit A/D resolution
    *Not available for MR8741

Model No. (Order Code)

8971 For MR6000, MR8847A, MR8827, and similar products
Note: This module must be used with the Memory HiCorder. Current sensors are not supplied. Please purchase the appropriate sensors for the intended application.

List of Available Memory HiCorders

Please refer to the table here for the types of input units that can be used for each Memory HiCorder.

List of Available Memory HiCorders

Basic specifications

Accuracy guaranteed: 1 year
Measurement functions Number of channels: 2 CH, Current measurement with optional current sensor.
Up to four modules of 8971 can be used with a Memory HiCorder (models compatible with installation).
Input connectors Sensor connector (input impedance 1 MΩ, exclusive connector for current sensor via conversion cable the 9318, common ground with recorder)
Applicable current sensor 9272-05, CT6841A, CT6843A, CT6844A, CT6845A, CT6846A, CT6862-05, CT6863-05, CT6872、CT6872-01, CT6873, CT6873-01, CT6875A, CT6875A-1, CT6876A, CT6876A-1, CT6904A, CT6904A-1, CT6904A-2, CT6904A-3

*Connect the optional Conversion Cable CT9901 {converts ME15W (12pin) terminal to PL23 (10pin) terminal} in combination with the 9318 supplied with model 8971.
Measurement range When Model 9272-05 (20 A), CT6841A is used: 2, 4, 10, 20, 40, 100 A f.s. (f.s. =20div, Choice of 6 ranges)
When Model CT6862-05, CT6872, CT6872-01 is used: 4, 10, 20, 40, 100, 200 A f.s. (f.s. =20div, Choice of 6 ranges)
When Model 9272-05 (200 A), CT6843A, CT6863-05, CT6873, CT6873-01, CT6904A, CT6904A-1, CT6904A-2, CT6904A-3 is used: 20, 40, 100, 200, 400, 1000 A f.s.(f.s. =20div, Choice of 6 ranges)
When Model CT6844A, CT6845A, CT6875A, CT6875A-1, CT6846A, CT6876A(*1), CT6876A-1(*1) is used: 40, 100, 200, 400, 1000, 2000 A f.s.(f.s. =20div, Choice of 6 ranges)
The measurable range is limited by the current sensor connected. Check the specifications of the respective current sensor.
*1: The instrument recognizes this as a 500 A AC/DC sensor is connected; setting the ratio of the scaling function to 2 is required.
Accuracy (with filter 5 Hz ON) Add the accuracy and characteristics of the current sensor used. Measurement accuracy: ±0.65% f.s.
RMS accuracy: ±1% f.s. (DC, 30 Hz to 1 kHz), ±3% f.s. (1 kHz to 10 kHz)
RMS response time: 100ms (rise time from 0 to 90% of full scale), Crest factor: 2
Frequency characteristics: DC to 100 kHz, ±3dB (with AC coupling: 7 Hz to 100 kHz)
Measurement resolution Uses 12-bit A/D
When used with MR8847A: 1/100th of the measuring range
When used with MR6000: 1/2000 of the measuring range
Highest sampling rate 1 MS/s (simultaneous sampling across 2 channels)
Other functions Input coupling: AC/DC/GND, Low-pass filter: 5, 50, 500, 5k, 50kHz, or OFF
Dimensions and mass 106 mm (4.17 in) W × 19.8 mm (0.78 in) H × 196.5 mm (7.74 in) D, 250 g (8.8 oz)
Accessories CONVERSION CABLE 9318 × 2 (To connect the current sensor to the 8971)

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