GL7-CHA

    This is the input module for the sensors based on the piezoelectric elements capable of measuring a variety phenomena as acceleration, pressure, force. It is able to connect the sensor directly and also able to measure the voltage. It supports the TEDS in the sensor and allows to make setup easily.
    It supports various filters capable to have high-precision measurement.

    High-precision measurement using various filters

    High-precision signal is able to be captured by the high-pass, low-pass, and anti-aliasing filter.

    Supports a variety piezoelectric type sensors

    This module supports a variety type of piezoelectric sensors including an acceleration sensor,
    and supports direct connection of the sensor.

    Type of sensor Unit of sensitivity (example)
    Piezoelectric type sensors Charge output type Acceleration sensor pC/(m/s2)、pC/(9.8m/s2)、pC/g、pC/G
    Pressure sensor pC/bar、pC/N、pC/Pa
    Force/Load sensor pC/lb、pC/kN
    Voltage output (IEPE) type Acceleration sensor mV/(m/s2)、mV/(9.8m/s2)、mV/g、mV/G
    Pressure sensor mV/psi、mV/kPa、mV/Pa、mV/bar
    Force/Load sensor mV/lb、mV/lbf、mV/N、mV/kN

    The charge output type and voltage output (IEPE) type are available in the piezoelectric type sensor
    for measuring a wide variety phenomena. Variety type of sensors are able to use by
    setting the sensitivity and the unit of measurement.

    Application examples

    Categories: ,
      Description

      GL7-CHA specification

      Item Description
      Type of module Charge amplifier module – for sensor based on Piezoelectric element –
      Model number GL7-CHA
      Number of input channels 4 channels
      Input method All channels isolated unbalanced input, Simultaneous sampling,
      BNC and Miniature connector (#10-32UNF)
      Sampling speed (interval) 100 k Samples/s to 1 sample/h (10 μs to 1 hr.)
      Built in RAM 2 million samples for each channel
      Input type Sensor in charge output type, Sensor in IEPE type, Voltage
      Input coupling Sensor: Charge-RMS, IEPE-RMS
      Voltage: DC, AC, DC-RMS, AC-RMS
      Measurement range Acceleration sensor input 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, 2000, 5000, 10000, 20000, 50000 m/s2
      Voltage input DC, AC coupling: 50, 100, 200, 500 mV, 1, 2, 5, 10 V
      RMS measurement: 20, 50, 100, 200, 500 mVrms, 1, 2, 5 Vrms
      (Crest Factor in RMS measurement: up to 4 in 20 mVrms to 2 Vrms range, up to 2 in 5 Vrms range)
      Supported sensor sensitivity Charge output type 0.01 pC/(m/s2) to 999.9 pC/(m/s2)
      IEPE type 0.01 mV/(m/s2) to 999.9 mV/(m/s2)
      Measurement accuracy (*1) Charge output type ±0.9% of Full Scale ([sensor sensitivity] × [setting range] ≥ 20 pC)
      IEPE type ±0.25% of Full Scale ([sensor sensitivity] × [setting range] ≥ 200 mV)
      A/D converter Successive Approximation type, 16bits (effective resolution: 1/40000 of the measuring full range)
      Input impedance 100 kΩ ±5%
      Excitation power 4 or 8 mA (supported voltage: 22 V ±10%)
      Maximum input charge signal Max. 50000 pC
      Maximum input voltage Between (+) / (-) terminal 25 Vp-p
      Between channels ((-) terminals) 25 Vp-p
      Between channel / GND 25 Vp-p
      Max. voltage (withstand) Between channels 300 Vp-p (1 minute)
      Between channel / GND 300 Vp-p (1 minute)
      Isolation Between input / GND Min. 50 MΩ (at 500 V DC)
      Common-mode rejection ratio Min. 80 dB (50/60 Hz, Signal source impedance: Max. 300 Ω)
      Frequency response Charge type 1.5 Hz to 45 kHz
      IEPE type 1 Hz to 45 kHz
      Filter Hi pass Off, 0.15, 1, 10 Hz
      Low pass Off, Line(1.5 Hz), 3, 6, 10, 30, 50, 60, 100, 300, 500 Hz, 1k, 3k, 5k, 10k Hz (in -30dB/oct)
      Anti-aliasing Off, On
      Support TEDS Standard IEEE 1451.4 Class1 (Temperate No.25)
      Support Reading information from the sensor and setting it to module
      Calculation function Integration (convert measurement to velocity),
      Double Integration (convert measurement to displacement)
      External dimensions (W x D x H) Approx. 49 x 136 x 160mm (Excluding projections)
      Weight Approx. 850 g
      Subject to the conditions:
      ● Room temperature is 23ºC ±5ºC. ● When 30 minutes or more have elapsed after power was turned on.
      ● Filter is set to 10 or Line. ● Sampling rate is set to 1 second.
      ● GND terminal is connected to ground.