Acceleration pickup & voltage input dual input module

Key Features

  • Charge input terminal for piezoelectric type acceleration pickup
  • Isolated 2 channel input
  • Max. rated voltage to ground: 30 V AC or 60 V DC
  • Acceleration pickup with built-in preamplifier can also be directly input (BNC terminal)
  • Equipped with constant current source for driving preamplifier
  • Even measure general voltage signals with high, 16-bit A/D resolution
  • Equipped with anti-aliasing filter essential for FFT analysis
  • TEDS compatible, automatic sensitivity setting

Model No. (Order Code)

U8979 For the MR6000 and similar products
Note: Use it by installing it in the Memory HiCorder.  Customer-supplied acceleration pickup sensor is necessary to measure acceleration.

Charge-output type and voltage-output type acceleration sensors are supported

For example, an acceleration sensor affixed to the chassis on which the motor is mounted, when connected to the Charge Unit U8979, can measure vibrations being transferred to the chassis. The MR6000's or MR8847A’s FFT calculation function can be used to perform a frequency analysis of torque and vibration signals.

TEDS compatibility enables automatic setting of sensor sensitivity

TEDS (Transducer Electronic Data Sheet)-compatible sensors digitize the sensor information inside the sensor. By using TEDS-compatible accelerometers, you can set the sensitivity of the sensor with a single touch.

Comparison Table

This is a comparison table against the discontinued 8947 charge unit. Please refer to this table when you consider replacement.
*The 8947 cannot be used with current memory HiCoders (MR6000 series, MR8847A series, MR8827, MR8740/41, and MR8740T).

Click here for the comparison table.

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, for acceleration measurement
Input terminals Input for voltage input / preamplifier built-in: Metal BNC terminal (when voltage input: input resistance 1 MΩ, input capacity 200 pF or less)
Charge input: Miniature connector (# 10-32 UNF)
Max. rated voltage to earth: 30 VAC or 60 VDC (with input isolated from the unit, the maximum voltage that can be applied between input channel and chassis and between input channels without damage) The voltage input terminal GND and the charge input terminal GND in the same channel are common
Adaptive converter Charge output type acceleration detector, Accelerometer with built-in preamplifier
Measurement range
Charge input: (Miniature connector)
Input for preamplifier built-in: (BNC terminal)
1 (m/s^2) to 200 k (m/s^2) f.s., 12 ranges × 6 kinds
Charge input sensitivity: 0.1 to 10 pC / (m/s^2)
Preamplifier Built-in sensor input sensitivity: 0.1 to 10 mV / (m/s^2)
Amplitude accuracy: ± 2% f.s.
Frequency characteristic: 1 (1.5) to 50 kHz -3 dB (charge input)
Low pass filter: 500/5 kHz
Preamplifier power supply: 3.5 mA ± 20%. 22 V ± 5%
Maximum input charge: ± 500 pC (high sensitivity side 6 range), 50.000 pC (low sensitivity side 6 range)
Measurement range
Voltage input: (BNC terminal)
10 mV to 40 V f.s., 12 ranges, DC amplitude accuracy: ± 0.5% f.s.
Frequency characteristics: DC to 50 kHz -3 dB (when DC-coupled), 1 Hz to 50 kHz -3 dB (when AC-coupled)
Low pass filter: 5/500/5 kHz, Input coupling: AC/DC/GND
Max. allowable voltage: 40 V DC
Measurement resolution 1/25000 of measurement range (using 16-bit A/D conversion)
Highest sampling rate 200 kS/s
Anti-aliasing filter Built-in filter for eliminating aliasing phenomenon (aliasing distortion) in FFT operation (Cutoff frequency automatic setting / OFF)
TEDS IEEE 1451.1.4 class 1 compatible (Reading sensor information, corresponding to automatic setting of sensitivity)
Dimensions and mass 106 mm (4.17 in) W × 19.8 mm (0.78 in) H × 196.5 mm (7.74 in) D, 230 g (8.1 oz)
Included accessories None

Use with these products (1)

* Main products are listed below. For more information, please see each product page.

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