EPOCH 4 Ultrasonic Flaw Detectors

 

The EPOCH 4 flaw detector provides a combination of high-quality ultrasonic performance, simple operation and many documentation capabilities.

EPOCH 4

Download pdf Brochure (628 kb)

STANDARD FEATURES

  • Customizable narrowband filtering

  • Selectable, tunable square wave or spike excitation pulser

  • Light, ergonomic design (5.7 lbs/2.6 kg)

  • High-power NiMH battery

  • High resolution ELD or LCD with full and split screen views

  • Easy, automated transducer calibration

  • Fast, minimum 60 Hz electronics update rate

  • Full screen capability of 400 in (10,000 mm) longitudinal velocity of steel

  • Superior minimum range capability (0.038 in or 1 mm full scale at longitudinal velocity in steel)

  • Display freeze holds waveform and soundpath data

  • Soundpath data viewable in units of inches, millimeters or microseconds

  • Peak hold and peak memory features

  • RF display mode

  • Alarms, threshold positive/negative or minimum depth

  • Dual gate with echo-to-echo measurements

  • Security key permits remote upgrade of software options

SOFTWARE OPTIONS

 

Optional GageView Pro Interface Program

The optional GageView Pro interface program adds many practical editing, documentation, review and interface capabilities to the EPOCH 4. It helps manage and format stored inspection data for convenient transfer to and from other software applications.

 

Alphanumeric Datalogger

The EPOCH 4 flaw detector’s sophisticated datalogger is designed for ease of use while providing a wide range of features for flaw detection and thickness gaging applications. All saved data can be organized in alphanumeric file names and identifier codes that can be scrolled and reviewed on-screen. A memo feature permits entry of additional inspection data, and the edit feature can be used to add, delete or clear file names and ID numbers. Available with optional expandable memory.

 

B-Scan

Generates an easy to understand cross-sectional profile view of an inspected part. Excellent for corrosion mapping of pipes, boilers and storage tanks. This view can be used to visually verify acquired thickness measurements and also highlight areas with critically thin thickness values. Download pdf Brochure (203 kb)

 

DAC (Distance Amplitude Correction)

Calculates signal amplitude as a percentage or dB difference of the DAC curve level (ASME, ASME-3, or JIS). Same size reflectors peak along the curve independent of their location. An alarm can be activated when a gated signal breaks the curve.

 

CSC (Curved Surface Correction)

Corrects sound path information when using an angle beam transducer to inspect circumferentially around a curved surface.

 

Spotweld Overlay

Allows on-screen comparison of the live waveform with a stored reference waveform. The Stamping feature permits stored weld data to be stamped good, undersized, stick, or two other operator defined conditions.

 

Auto-Freeze

Provides the ability to automatically freeze the A-Scan waveform when a gate alarm has been triggered. The echo pattern can then be evaluated by the operator and saved if desired.

 

TVG (Time Varied Gain) with 40dB Dynamic Range

Corrects for distance/amplitude variations due to material attenuation and beam spreading. Reference echoes are brought to a standard full screen level of 80 percent.

 

Floating Gate

Automatically varies Gate Level by -6dB or -12dB of the gated backwall echo. Results in consistency of edge-depth measurements by making readings at the same relative amplitude.

 

Interface Gate

Powerful tool for immersion applications where the water path distance between the transducer and front surface of the part is continually changing. Maintains the Interface Echo (between the water and the front surface of the part) on the left side of the EPOCH 4’s display.

 

AWS D1.1 and D1.5

Provides a dynamic reflector "indication rating" for various AWS weld inspection applications. This allows for a more efficient inspection by eliminating manual calculations.

 

Wave Analysis

Used to select particular points along an RF waveform and then obtain a timing/thickness measurement and also a dB difference between the two points. Applications include measuring the scale/oxide buildup on the inner diameter of boiler tubes.

 

DGS/AVG

Flaw sizing technique that permits echo signals to be evaluated using DGS/AVG diagram associated with a particular type of probe and material. The DGS/AVG diagram shows the relationship between echo height, flaw size and distance from the transducer.

 

Expanded Memory

Increases datalogger capacity from 500 waveforms/10,000 thickness readings, to 2,000 waveforms/40,000 thickness readings.

 

High PRF (1,000Hz)

Increases the PRF rate of the EPOCH 4 and is useful for higher scanning speed inspections. The high PRF software fixes the PRF at 1KHz.

 

Low PRF (30Hz)

Reduces or eliminates “wrap-around” noise by setting the PRF to a fixed 30Hz. This feature is often necessary when inspecting materials that are highly attenuating or have long sound paths.