Digital acoustic emission sensor ZET 7140-E

  • Socket type for transducer connection SMA
  • Interface input overvoltage protection (1 A current) 19 V
  • Interface input surge protection (350 W, 8/20 µsec) 28 V

From 401 USD

Specifications

of Digital acoustic emission sensor ZET 7140-E

Metrological Data
Measured parameter amplitude (dB)
build-up time (µsec)
fall time (µsec)
number of exceeding events (pcs)
signal energy (mV*sec)
Type of connected sensors acoustic emission transducers
Event filtration by amplitude
Detection range 0.5 ~ 100 mV
Input resistance 100 kOhm
Amplification 10
Measurement range ±100 mV
Data refresh rate (by signal shape and noise level channels) 1 Hz
Peak level of self-noise 100 µV
Bandwidth 20 ~ 1000 kHz
Response speed up to 2,000 events per second
Technical Specifications
Synchronization via Precision Time Protocol (PTP)
Data interface CAN 2.0
Transmission rate 100, 300, 1000 kbps
Socket type for transducer connection SMA
Interface input overvoltage protection (1 A current) 19 V
Interface input surge protection (350 W, 8/20 µsec) 28 V
Performance Specifications
Dimensions 93×50×24 mm
Weight 40 g
Power supply 9 to 24 V
Consumed current @ 12 V up to 110 mA
Operating temperature range -40 to +80 °C
  • Hardware Versions

    Standard: laboratory design in a plastic cover (green)
    OEM: board covered with a sealing compound.
    Heavy Duty*: unit of standard design in air-tight cover
    (with a transparent lid)
    *Option

Advantages

of Digital acoustic emission sensor ZET 7140-E

No Electromagnetic Interference

Process detection and calculation are performed close to the PT

Time Synchronization

Possibility of detection and assessment of spatial characteristics of acoustic waves

Remote Method

Possibility to perform control at a significant distance between the operator and the studied object

Acoustic Emission Pulse Processing Speed

Over 10,000 events/second per channel

Built-In Amplifier

GR=100
GR may be customized

Reliability

Stable characteristics and high reliability in operation

Operation Principle

of Digital acoustic emission sensor ZET 7140-E

The digital acoustic emission sensor consists of the BC 601 acoustic emission transducer and the ZET 7140-E measuring unit which digitizes the signal from the transducer and transmits the acoustic emission values in a digital form via CAN interface.

The transducer parameters are set in ZET 7140-E memory so there is no need for the user to set up the measuring channels. Another advantage of the digital sensors is that ready data are transmitted from the outputs no requiring any additional processing.

Application Scope

of Digital acoustic emission sensor ZET 7140-E

  • Pipe-rolling and metallurgical facilities

  • Rail-road transport

  • Bridge structures

  • Concrete and reinforced concrete structures

  • Oil and gas and chemical industries

  • Heat and nuclear energy industry

  • Lifting structures

  • Aerospace engineering

Digital acoustic emission sensor ZET 7140-E are used as a part of the hardware and software complex, “Time-of-flight acoustic control method” for measurements of material strength using TOFD method.

Connecting To The Measurement Network

of Digital acoustic emission sensor ZET 7140-E

ZET 7140-E

SMA socket
PT connection

ZET 7140-E

Socket for connecting to
the measurement network

Diagram of connection

Diagram of connection
to a measurement network

Measurement Network Diagram

Based on the Digital acoustic emission sensor ZET 7140-E

Measurement Network Structure:

  • BC 601 primary transducers;
  • ZET 7140-E measuring units;
  • ZET 7174 CAN to USB interface converter or ZET 7176 CAN to Ethernet converter;
  • PC with ZETLAB SENSOR software, ZETKEY key for the software activation;
  • ZET 7172-M and ZET 7172S units, if wireless data transmission is required.

Test impact types

AC - alternating signal

FR: «Required frequency value»: «Frequency tolerance» – alternating signal frequency;

AM: «Required signal amplitude value»: «Signal amplitude tolerance» – alternating signal amplitude;

OF: «Generated signal bias»: «Generated signal bias tolerance» – generated signal bias;

TM: «Signal analysis time» – signal control time (minimal signal analysis time for transient processes or long-time tests)

Example:
AC;FR:0.5:0.01;AM:0.4:0.002;OF:0.1:0.0001;TM:5
Alternating signal with frequency: 0.5 ± 0.01 Hz, amplitude: 0.4 ± 0.002 V, bias: 0.1 ± 0.0001 V, minimal signal control time – 5 s.

DC - constant signal

LE: «Required signal level»: «Signal level tolerance» – generated signal level.

TM: «Signal analysis time» – control signal time (signal analysis minimal time for transient and long-time processes tests)

Example:

DC;LE:0.5:0.001;TM:5
constant signal: 0.5 ± 0.001 V, minimal signal control time – 5 s.

ST1 - stepwise change

AM: «Minimal value»: «Maximum value» – change range.

TM: «Signal setting time» – time before signal control start

Example:
ST1;AM:100:200;TM:5
stepwise change: for 100..200 units, minimal signal control time – 5 s.

ST2 - stepwise change

MD: «Minimal change»: «Maximum change» – change amplitude.

TM: «Signal setting time» – time before signal control start

Example:
ST2;MD:10:10.5;TM:6
stepwise change: for 10..10.5 units in modulus, minimal signal control time – 6 s.

PPS - Pulse-per-second signal

SP: «Acceptable counts deviation» – amount of counts before or after start of a second.

Level change to be checked one time in a second.

Example:
PPS;SP:2 –
the change should take place in the beginning of a second, 2 counts.

Device type is selected from the dropdown list. In order to select a device, pick an element with left mouse key and choose a device to be checked from the list.

Use selector to set particular test. To set the test number click the number with left mouse key and set the required value by scroll. If the self-check is on, the selector will not be available until the user stops the project or the self-check is over. There is a key for start / stop of the process. The green key means that the diagnostics process is on, grey key stands for  for idle state.

Indicator is a timer showing the elapsing time of the current test. The countdown is started after beginning of any test. Test results are available in the log.

Basic configuration

of digital acoustic emission sensors

Basic configuration of digital family sensors

Sensor basic configuration includes:

  • Digital acoustic emission sensor ZET 7140-E;
  • set of operational documentation.

From 401 USD

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Necessary measuring equipment

supplied upon special order

Acoustic emission sensor cover
BC 601
Acoustic emission sensor

ZET 7174
ZET 7174
USB connection

ZET 7176
ZET 7176
Ethernet connection