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Description
A-LINE DDM-2 acoustic-emission measuring system with digital data transmission
Applications
- nondestructive testing of trunk, field and processing pipelines, pressure vessels, tanks, boilers, drilling towers, cranes, bridges and other objects by acoustic emission without decommissioning;
- detection of cracks initiation and growing;
- search of corrosion zones, leaks, zones with increased stress level;
- localization and evaluation of defects parameters;
- technological processes monitoring and assessment of technical condition of responsible large-sized structures, long-distance or especially dangerous objects in real-time mode.
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Composition
A-LINE DDM-2 - Acoustic-emission measuring system with digital data transmission
- 8 measuring lines in the standard data acquisition and processing unit
- up to 20 AE-modules per line
- Self-check of the line integrityand performance
- Ex version with intrinsic safety «i» type of protection
AE-module- reduced dimensions and weight
- increased IP rating
- AE channel autocalibration
- usable bayonet connectors
Data transmission cable- maximum data transmission cable length 150 m (between adjacent AE-modules)
- standard coaxial cable forassembly of AE-modules into the line and digital data transmission
- reduced dimensions and weight of cable reel
Line Splitter- splitters of measuring lines
- serial, star or combined topology of measuring lines -
Characteristics
Basic characteristics
General parameters Interfaces of data acquisition and processing unit 1 Ethernet, Wi-Fi Measuring channels ADC resolution, bit 18 Maximum ADC sampling rate 2, MHz 4 Bandwidth, kHz 15 ÷ 650 Cut-off frequencies accuracy, % ±10 Amplitude flatness within bandwidth, dB -3 ÷ +1 Maximum input referred noise (with 30 to 500 kHz filter), dB 29 Maximum AE signal amplitude, dB:
- ALM-02A*
- ALM-02E*
105
100Minimum AE signal amplitude dynamic range, dB:
- with 100 to 300 kHz filter:
- ALM-02A*
- ALM- 02E*
- with 30 to 500 kHz filter:
- ALM-02A*
- ALM-02E*
- with 15 to 650 kHz filter:
- ALM-02A*
- ALM-02E*
78
72
75
69
73
67AE signal amplitude accuracy, dB ±1 Threshold set range, dB:
- ALM-02A*
- ALM-02E*
16 ÷ 106
16 ÷ 100Minimum AE signal duration, μs 1 Maximum AE signal duration, μs 120 000 AE signal duration (D) accuracy, μs ±(1,5 + 0,0001·D) Minimum AE signal count, pcs 1 Maximum AE signal count, pcs 60000 AE signal arrival time resolution 2, μs 0,25 Power supply AC power supply:
- voltage, V
- frequency, Hz
90 ÷ 264
47 ÷ 63Maximum AC power consumption, kW 5
Data acquisition and processing unit
General parameters Maximum number of lines per input, pcs 4 Maximum number of ALM modules per input, pcs 20 Maximum number of ALM modules per line, pcs 20 Maximum line length, m:
- BNCI-1 cable
- BNCI-2 cable
1800
3000DC power voltage for external devices supply, V 72 Power supply AC power supply:
- voltage, V
- frequency, Hz
90 ÷ 264
47 ÷ 63Operation conditions Measurement conditions:
- temperature range 3, °С+5 ÷ +40 1 - only for «Ethernet Box» or «Ethernet Box XL» designs
2 - current ADC sampling rate depends on selected digital filter
3 - except for laptop
* - for all versionsThe characteristics of the ALM-02 modules for digital processing and transmission of AE parameters and ALMB splitters are given in the "Components" section
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Application
Objects with hardly accessible or inaccessible zones
Long-distance linear or large-size objects
Objects with complex (combined) structure, groups of objects
A-LINE DDM-2 acoustic-emission measuring system with digital data transmission
Applications
- nondestructive testing of trunk, field and processing pipelines, pressure vessels, tanks, boilers, drilling towers, cranes, bridges and other objects by acoustic emission without decommissioning;
- detection of cracks initiation and growing;
- search of corrosion zones, leaks, zones with increased stress level;
- localization and evaluation of defects parameters;
- technological processes monitoring and assessment of technical condition of responsible large-sized structures, long-distance or especially dangerous objects in real-time mode.
A-LINE DDM-2 - Acoustic-emission measuring system with digital data transmission
|
|
- 8 measuring lines in the standard data acquisition and processing unit - up to 20 AE-modules per line - Self-check of the line integrityand performance - Ex version with intrinsic safety «i» type of protection |
|
AE-module |
- reduced dimensions and weight - increased IP rating - AE channel autocalibration - usable bayonet connectors |
|
Data transmission cable |
- maximum data transmission cable length 150 m (between adjacent AE-modules) - standard coaxial cable forassembly of AE-modules into the line and digital data transmission - reduced dimensions and weight of cable reel |
|
Line Splitter |
- splitters of measuring lines - serial, star or combined topology of measuring lines |
Basic characteristics
| General parameters | |
| Interfaces of data acquisition and processing unit 1 | Ethernet, Wi-Fi |
| Measuring channels | |
| ADC resolution, bit | 18 |
| Maximum ADC sampling rate 2, MHz | 4 |
| Bandwidth, kHz | 15 ÷ 650 |
| Cut-off frequencies accuracy, % | ±10 |
| Amplitude flatness within bandwidth, dB | -3 ÷ +1 |
| Maximum input referred noise (with 30 to 500 kHz filter), dB | 29 |
| Maximum AE signal amplitude, dB: - ALM-02A* - ALM-02E* |
105 100 |
| Minimum AE signal amplitude dynamic range, dB: - with 100 to 300 kHz filter: - ALM-02A* - ALM- 02E* - with 30 to 500 kHz filter: - ALM-02A* - ALM-02E* - with 15 to 650 kHz filter: - ALM-02A* - ALM-02E* |
78 72 75 69 73 67 |
| AE signal amplitude accuracy, dB | ±1 |
| Threshold set range, dB: - ALM-02A* - ALM-02E* |
16 ÷ 106 16 ÷ 100 |
| Minimum AE signal duration, μs | 1 |
| Maximum AE signal duration, μs | 120 000 |
| AE signal duration (D) accuracy, μs | ±(1,5 + 0,0001·D) |
| Minimum AE signal count, pcs | 1 |
| Maximum AE signal count, pcs | 60000 |
| AE signal arrival time resolution 2, μs | 0,25 |
| Power supply | |
| AC power supply: - voltage, V - frequency, Hz |
90 ÷ 264 47 ÷ 63 |
| Maximum AC power consumption, kW | 5 |
Data acquisition and processing unit
| General parameters | |
| Maximum number of lines per input, pcs | 4 |
| Maximum number of ALM modules per input, pcs | 20 |
| Maximum number of ALM modules per line, pcs | 20 |
| Maximum line length, m: - BNCI-1 cable - BNCI-2 cable |
1800 3000 |
| DC power voltage for external devices supply, V | 72 |
| Power supply | |
| AC power supply: - voltage, V - frequency, Hz |
90 ÷ 264 47 ÷ 63 |
| Operation conditions | |
| Measurement conditions: - temperature range 3, °С |
+5 ÷ +40 |
1 - only for «Ethernet Box» or «Ethernet Box XL» designs
2 - current ADC sampling rate depends on selected digital filter
3 - except for laptop
* - for all versions
The characteristics of the ALM-02 modules for digital processing and transmission of AE parameters and ALMB splitters are given in the "Components" section
Objects with hardly accessible or inaccessible zones
Long-distance linear or large-size objects
Objects with complex (combined) structure, groups of objects