GL7-CHA
Charge Module

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.

Added menu selection for microphones

Added a menu for sound input by piezo-based microphones on the Charge/Acceleration Module (GL7-CHA).

Sound or vibration analysis can be performed by third party software using recorded sound data.

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

Industry Construction &
Public Works		 Machinery industry Electrical
equipment industry		 Transportation
equipment industry		 Energy
(Electricity, Gas)
Application
examples		 Seismic isolation measurement Movement of the robot Vibration of the enclosure Running test Vibration of the enclosure
Research and
maintenance of structure		 Vibration of the motor, pump Drop test Shaking test
Vibration of installed products Vibration of bearings Substrate vibration Vibration of an engine

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, Condenser microphone (CCLD) for noise sound by vibration (*1), 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
Microphone input (*1) 200, 400, 500 mPa, 1, 2, 4, 5, 10, 20, 40, 50, 100, 200, 400, 500 Pa
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)
Effective range of measurement range varies depending on sensor sensitivity.
Please refer to the following chart for details.
IEPE type 0.01 mV/(m/s2) to 999.9 mV/(m/s2)
Effective range of measurement range varies depending on sensor sensitivity.
Please refer to the following chart for details.
Microphone (*1) 0.2 mV/Pa to 100 mV/Pa
Measurement accuracy (*2) Voltage ±0.25% of Full Scale
In DC-RMS (by Sine wave):
±0.5% of Full Scale at 20 Hz to 1 kHz
±1.5% of Full Scale at 1 kHz to 5 kHz
In AC-RMS (by Sine wave):
±0.5% of Full Scale at 100 Hz to 1 kHz
±1.5% of Full Scale at 1 kHz to 5 kHz
Charge output type ±0.9% of Full Scale ([sensor sensitivity] × [setting range] ≥ 20 pC)
In RMS (by Sine wave): ±1.4% of Full Scale at 20 Hz to 1 kHz
IEPE type ±0.25% of Full Scale ([sensor sensitivity] × [setting range] ≥ 200 mV)
In RMS (by Sine wave): ±0.75% of Full Scale at 20 Hz to 1 kHz
Microphone ±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 (It depends on input conditions.)
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 Acceleration sensor: IEEE 1451.4 Class1 (Temperate No.25)
Microphone: IEEE 1451.4 Class1 (Temperate No.27)
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

(*1)

It is required firmware version 2.0 or later.

(*2)

Subject to the conditions:
● Room temperature is 23℃ ±5℃.

● When 30 minutes or more have elapsed after power was turned on.

● Filter is set to 10 or Line.

● GND terminal is connected to ground.
Measurement accuracy of RMS is effective for input voltage of 5 to 100% in each measurement range.

Settings of the range and charge sensitivity (○:Available)

Range Charge sensitivity　Unit: mV/ (m/s2)
0.0100 to 0.5000 0.5001 to 2.0000 2.0001 to 5.0000 5.0001 to 10.0000 10.0001 to 20.0000 20.0001 to 50.0000 50.0001 to 100.0000 100.0001 to 200.0000 200.0001 to 500.0000 500.0001 to 999.9999
1m/s2 ○ ○
2m/s2 ○ ○
5m/s2 ○ ○ ○ ○
10m/s2 ○ ○ ○ ○ ○
20m/s2 ○ ○ ○ ○ ○
50m/s2 ○ ○ ○ ○ ○ ○ ○
100m/s2 ○ ○ ○ ○ ○ ○ ○
200m/s2 ○ ○ ○ ○ ○ ○
500m/s2 ○ ○ ○ ○ ○ ○
1000m/s2 ○ ○ ○ ○ ○
2000m/s2 ○ ○ ○ ○ ○
5000m/s2 ○ ○ ○ ○
10000m/s2 ○ ○ ○
20000m/s2 ○ ○
50000m/s2 ○

<IEPE/IEPE-RMS Input>

Settings of the range and voltage sensitivity (○:Available)

Range Voltage sensitivity　Unit: mV/ (m/s2)
0.0100 to 0.0200 0.0201 to 0.0500 0.0501 to 0.2000 0.2001 to 0.5000 0.5001 to 1.0000 1.0001 to 2.0000 2.0001 to 5.0000 5.0001 to 10.0000 10.0001 to 20.0000 20.0001 to 50.0000 50.0001 to 100.0000 100.0001 to 200.0000 200.0001 to 500.0000 500.0001 to 999.9999
1
m/s2		 ○ ○ ○ ○
2
m/s2		 ○ ○ ○ ○ ○
5
m/s2		 ○ ○ ○ ○ ○ ○
10
m/s2		 ○ ○ ○ ○ ○ ○ ○
20
m/s2		 ○ ○ ○ ○ ○ ○ ○
50
m/s2		 ○ ○ ○ ○ ○ ○ ○ ○
100
m/s2		 ○ ○ ○ ○ ○ ○ ○
200
m/s2		 ○ ○ ○ ○ ○ ○ ○
500
m/s2		 ○ ○ ○ ○ ○ ○ ○
1000
m/s2		 ○ ○ ○ ○ ○ ○ ○
2000
m/s2		 ○ ○ ○ ○ ○ ○
5000
m/s2		 ○ ○ ○ ○ ○ ○
10000
m/s2		 ○ ○ ○ ○ ○
20000
m/s2		 ○ ○ ○ ○
50000
m/s2		 ○ ○ ○

<Microphone input>

Range and voltage sensitivity settings

Range Voltage sensitivity　Unit: mV/Pa
0.2 to 0.5 0.5 to 1 1 to 2 2 to 5 5 to 10 10 to 20 20 to 50 50 to 100
200 mPa ○
400 mPa ○
500 mPa ○
1 Pa ○ ○ ○
2 Pa ○ ○ ○
4 Pa ○ ○
5 Pa ○ ○ ○
10 Pa ○ ○ ○ ○ ○ ○
20 Pa ○ ○ ○ ○ ○
40 Pa ○ ○ ○
50 Pa ○ ○ ○ ○ ○
100 Pa ○ ○ ○ ○ ○ ○ ○ ○
200 Pa ○ ○ ○ ○ ○
400 Pa ○
500 Pa ○ ○ ○ ○

DOCUMENT

GL7-DCB Guide