Preface
Part # 910-250C
1
1Preface
The preface provides the following introductory topics:
• Product Description
• About this Document
•Audience
• Typographic Conventions
• Related Documentation
• If You have Documentation Comments
• Revision History
• Technical Help
1.1 Product Description
The EPOCH 4PLUS is a lightweight, portable flaw detector offering ultrasonic
performance, resolution, and documentation capabilities with a color display that has
special advantages over basic, traditional displays. You can choose from eight (8) colors
for screen text, A-Scan waveform, gates, Peak Memory, DAC and TVG curve, and more.
Improvements over previous models include:
• Compatible with EMAT transducers using a frequency range of 1 to 5 MHz, resolving
echoes from parts as thin as 0.080 inches (2 mm) and as thick as 5 inches (125 mm).
• Capable of storing as many as 6,000 A-Scans or 120,000 thickness readings.
Calibration and test data can be labelled with a 16 character alphanumeric file name
with up to 500 files. In addition, the editing feature allows IDs to be deleted or cleared
for future use. A handy memo feature allows unlimited comment and data description
entries. A memory display screen makes it possible to review the contents of any file
by scrolling through the actual data prior to deleting or recalling the information. Any
stored data can be sent directly from the EPOCH 4PLUS to the optional EPOCH
4PLUS GageView PRO Interface Program, which makes it easy to save, view, send,
or move data from application to application.
Updated benefits of the EPOCH 4PLUS include the following:
• 25 MHz bandwidth, user selectable narrowband filters, optional low and high PRF
rates of 30 Hz and 1,000 Hz, and the option to select a tunable square wave pulser or
negative spike pulser. The EPOCH 4PLUS also has an automatic transducer
calibration function to determine material velocity and zero offset.
• The light weight of the EPOCH 4PLUS (5.7 lbs./2.6 Kg.) and the comfortable
ergonomic design make it ideal for field inspectors with demanding applications. The
compact Nickel Metal Hydride battery pack provides six (6) hours of operation under
normal operating conditions and requires recharge times of less than three (3) hours.
• A large numeric display provides an instantaneous readout of material thickness,
soundpath, amplitude, or time of flight. When using an angle beam transducer, the
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