When evaluating conventional flaw detectors, a number of functional characteristics are often specified. These characteristics are generally shared with phased array instruments. Not all of the items listed below are available in all instruments.

Pulser and Receiver:

Largely defines the operating range of transducers that can be used with the instrument.

Measurement and Display:

Parameters defining the general measurement and display modes of an instrument -

• Number of alarm/measurement gates
• A-Scan display modes: Rectification (RF, Full Wave, Half Wave), Maximum, Composite, Averaged, Hollow, Filled, and Peak Memory
• Range
• Measurement Resolution
• Measurement types (i.e., sound path, depth, distance from front of probe, dB, dB to curve, etc.)
• Single Value B-Scan mode (not availble on most flaw detectors)
• Screen refresh rate
• Available sizing software

Physical/Operational:

• Size and weight
• Form factor, including control layout
• Compliance with industry standards for shock, vibration, drop, moisture, RF/EMI interference, etc.
• Battery life

Basic Setup Techniques