Olympus Epoch Ltc





Olympus Epoch LTC Ultrasonic Flaw Detector
the EPocH ltc digital ultrasonic flaw detector offers state-of-the-art technology in a compact and lightweight package. Based on the class-leading EPocH Xt, the EPocH ltc is full featured, complies with the En 12668-1 standard, and has various specialized options to meet your inspection needs.

Ultrasonic flaw detection is widely used in locating and sizing hidden cracks, voids, disbonds, and similar discontinuities in welds, forgings, billets, axles, shafts, tanks and pressure vessels, turbines, and structural components.

the EPocH ltc features a bright, multi-color transflective, full-VGa (640 pixels x 480 pixels) display offering high-resolution a-scans and superior visibility in all lighting conditions, including direct sunlight. the EPocH ltc is also designed for iP67 rating, ensuring that the instrument can perform in the harsh environments common in the inspection field.

Powerful Performance in a Compact Flaw Detector
the EPocH ltc offers many standard features to meet your inspection needs. these include a fixed width square wave pulser, dynamic Dac/tVG, onboard DGs/aVG, selectable digital filters, gain range from 0 dB to 110 dB, peak memory, 0.01 mm (0.001 in.) measurement resolution, and one gate with programmable alarms. in addition, the EPocH ltc offers many optional, application-specific software features such as aWs D1.1/D1.5 weld rating, manual PrF control, pulse width tuning, and the GageView Pro interface program.

Simplified Keypad Design
the EPocH ltc features a simple keypad design that allows full control with the left or right hand for direct access to important functions. the keypad design also makes for rapid and easy parameter adjustments and recall of instrument configuration (cal) files.

Built for Tough Environments
the EPocH ltc can withstand the rigors of field operation in harsh environments, from offshore to deserts.

Environmental Ratings
IP rating Designed to meet the standards of the ingress Protection (iP) rating number iP67
Explosive atmosphere safe operation as defined by class i, Division 2, Group D, as defined in the National Fire Protection association code (nFPa
70), article 500, and tested using Mil-stD-810F, Method 511.4, Procedure 1.
Shock tested iEc 60068-2-27; 60 g, 6 ms H.s., 3 axes, 18 shocks total
Vibration tested sine vibration as per iEc 60068-2-6; 50 Hz to 150 Hz at 0.03 in. Da or 2 g, 20-sweep cycles
Drop tested Mil-stD-810F, 4.5.5 Procedure iVヨtransit drop. 48 in. drop onto 2 in. plywood surface backed by concrete. Drop on each face, edge, and corner for a total of 26 drops
Operating temperature lithium-ion: ヨ10 °c to 50 °c (14 °F to 122 °F)
Battery storage temperature 0 °c to 50 °c (32 °F to 122 °F)
Recharge temperature range 0 °c to 40 °c (32 °F to 104 °F)
Battery compartment sealed ヨ no tools necesssary to replace battery
I/O door sealed i/o door for UsB on-the-Go connection, minisD card slot, and VGa/rs-232 port


  • Designed for IP67 rating to ensure field ruggedness
  • Complies with the EN12668-1 standard
  • Only 960 g (2.1 lb)
  • Full-color VGA display with transflective technology
  • USB On-The-Go port for computer communication and direct printing
  • Onboard and miniSD Card storage capabilities for the data logger
  • Standard dynamic DAC/TVG
  • Standard onboard DGS/AVG
  • Digital high dynamic range receiver with digital filters
  • High-performance square wave pulser with tuning option
Dimensions (W x H x D) 128.9 mm x 223.3 mm x 55.1 mm (5.07 in. x 8.79 in. x 2.17 in.)
Weight 960 g (2.12 lb) with li-ion battery
Keypad English
Display languages English, spanish, French, German, italian, Japanese, chinese, russian, norwegian, swedish
Transducer connection lEMo 00
Battery rechargeable lithium-ion. standard aa battery tray
Battery operating time lithium-ion rechargeable battery: 8 hours; aa li-Fes2: 6 hours
aa niMH cells: 4 hours; aa alkaline cells: 3 hours
Power compatibility 100/120 Vac, 200/240 Vac, 50-60 Hz
Display type color transflective lcD, refresh rate of 60 Hz, user-selectable color schemes and
brightness, two split-screen modes and one full-screen mode
Display dimensions (W x H) 640 pixels x 480 pixels, 75 mm x 56 mm (2.95 in. x 2.21 in.), 94 mm (3.7 in.) diagonal
Pulser Fixed width square wave pulser optimized for general flaw detection applications
Pulse width Fixed width in base instrument. adjustable from 45 ns to 5,000 ns (0.1 MHz)
with EPltc-sWP option
Pulse repetition frequency
automatically software controlled over the range of 10 Hz to 500 Hz.
Manual PrF control option available
Energy settings 100 V to 400 V in 100 V increments
Damping 50 O, 100 O, 200 O, 400 O
Gain 0 dB to 110 dB ラ two user-defined gain step adjustments and presets
Total instrument bandwidth  0.2 MHz to 26.5 MHz at ヨ3 dB
Digital filter settings Standard: 0.2 MHz to 10.0 MHz Broadband: 2.0 MHz to 21.5 MHz
High Pass: 8.0 MHz to 26.5 MHz
Rectification Full wave, positive half wave, negative half wave, rF
System linearity Horizontal: ±0.5% FsW
Resolution 0.25% FsH, amplifier accuracy ±1 dB
Amplitude measurement 0 to 110% full screen height with 0.25% resolution
Reject 0% to 80% full screen height with visual warning
Measurement rate Equal to PrF in all modes
Automated calibration Velocity, Zero offset
straight Beam (First Backwall or Echo-to-Echo)
angle Beam (soundpath or Depth)
Test modes Pulse Echo, Dual, or through transmission
Units Millimeters, inches, or microseconds
Range 3.36 mm to 6,702 mm (0.132 in. to 263 in.) at 5900 m/s (0.2320 in./ms)
Extended range option 3.36 mm to 13,404 mm (0.132 in. to 527 in.) at 5900 m/s (0.2320 in./ms))
Velocity 635 m/s to 15240 m/s (0.0250 in./µs to 0.6000 in./µs)
Zero offset 0 µs to 750 µs
Display delay 59 mm to maximum range (ヨ2.323 in. to maximum range)
Refracted angle 10° to 85° in 0.1° resolution
Measurement display locations 5 locations available (manual or auto selection)
Gate (1, 2) thickness, soundpath, Projection, Depth, amplitude, time-of-Flight,
Min./Max. Depth, Min./Max. amplitude
Echo-to-Echo standard Gate 2-Gate 1, optional iF Gate tracking
Other measurements overshoot (dB) value for DGs/aVG, Ers (equivalent reflector size) for
DGs/aVG, aWs D1.1/D1.5 rating (D), reject Value
DAC/TVG standard
DAC points Up to 50 points, 110 dB dynamic range
Special DAC modes custom Dac (up to 6 curves)
Curved surface correction standard oD or Bar correction for angle Beam measurements


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