CGM-5R ACPD Crack Growth Monitor
Data sheet, features and applications for the CGM-5R.
Legacy
CGM-5R ACPD Crack Growth Monitor
Designed for the accurate measurement of crack growth in metals, the CGM-5R operates by establishing an alternating current of constant amplitude and frequency in the specimen surface, or across a region where a crack is expected to develop — an established technique covered by the ASTM E647 standard.
Very high sensitivity and accuracy are possible because the operating frequency can be chosen to suit the electrical properties of the particular metal or alloy under investigation, inducing a pronounced skin-effect enhancement of the ACPD signal level.
Features
- High stability and ultra-high resolution
- Switchable output filters: very low freq, 80Hz, and out position
- Automatic phase setting, maintaining correct phase as conditions change (plus fixed / manual modes)
- Variable supply current, 0–2A continuously adjustable
- Multi-frequency operation, 300Hz–100kHz selectable in steps
- Full range of options: multiplexing units, probes and data-acquisition software
Applications
- Slow crack growth
- Crack sizing
- Dynamic crack growth studies
- Crack closure studies
- Crack initiation
- Fatigue crack initiation
- Condition monitoring
- Stress corrosion testing