DC/RMS UNIT 8972

Measure instantaneous and RMS waveforms

Key Features

  • High 12-bit A/D resolution
  • Isolated 2 channel input
  • Max. rated voltage to ground: 300 V AC, DC (CAT II)
  • From low to high frequency, wide bandwidth RMS rectifier installed (DC, or 30 Hz to 100 kHz)
  • Monitor instantaneous waveforms without the need to pass through the rectifying circuit

Model No. (Order Code)

8972 For MR6000, MR8847A, MR8827, and similar products
Note: This module must be used with the Memory HiCorder. Input probes are not included. Please purchase them separately.

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, Accuracy guarantee period after adjustment made by Hioki: 1 year
Measurement functions Number of channels: 2, for voltage measurement, DC/RMS selectable
Input connectors Isolated BNC connector (input impedance 1 MΩ, input capacitance 30 pF),
Max. rated voltage to earth: 300 V AC, DC (with input isolated from the unit, the maximum voltage that can be applied between input channel and chassis and between input channels without damage)
Measurement range 5 mV to 20 V/div, 12 ranges, full scale: 20 div, (AC voltage for possible measurement/display using the memory function: 280 V rms)
Low-pass filter: 5/50/500 Hz, 5 k/100 kHz
Measurement resolution 1/100 of measurement range (using 12-bit A/D conversion and when installed in 8847)
Highest sampling rate 1 MS/s (simultaneous sampling across 2 channels)
Measurement accuracy ±0.5 % of full scale (with filter 5 Hz, zero position accuracy included)
RMS measurement RMS amplitude accuracy: ±1 % of full scale (DC, 30 Hz to 1 kHz), ±3 % of full scale (1 kHz to 100 kHz),
Response time: SLOW 5 s (rise time from 0 to 90% of full scale), MID 800 ms (rise time from 0 to 90% of full scale), FAST 100 ms (rise time from 0 to 90% of full scale), Crest factor: 2
Frequency characteristics DC to 400 kHz -3 dB, with AC coupling: 7 Hz to 400 kHz -3dB
Input coupling AC/DC/GND
Max. allowable input 400 V DC (the maximum voltage that can be applied across input pins without damage)
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 None

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