Epoch LTC


Epoch LTC -
The EPOCH LTC Digital Ultrasonic Flaw Detector offers state-of-the-art technology in a package that is compact and lightweight 2.12 lbs (0.96 kg). Based on the design of the class-leading EPOCH XT, the EPOCH LTC is a full-featured instrument with EN12668-1 compliance and a wide variety of standard features as well as specialized options to meet your inspection needs.

Ultrasonic flaw detection is widely used for 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 instrument features a bright multi-color transflective display with full VGA (640 x 480) resolution providing a high resolution A-scan and superior visibility in all lighting conditions, including direct sunlight. The EPOCH LTC is also designed to the requirements of IP67, assuring that the instrument will perform in the harsh environments common in the inspection field


Epoch LTC Specification

EN12668-1 Compliant
Weight:2.12 lbs (0.96 kg) with Li-ion Battery
Dimensions:8.79" H x 5.07" W x 2.17" D; 223.3 mm x 128.9 mm x 55.1 mm
Keypad: English, International, Japanese or Chinese
Languages:English, Spanish, French, German, Italian, Japanese, Chinese, Russian, Norwegian, Swedish
Transducer Connections:LEMO 00
Battery:Rechargeable Lithium Ion. Pack for AA cells standard
Battery Operating Time:- Lithium Ion Rechargeable Pack: 8 hours
- AA Lithium Ion Cells: 6 hours
- AA NiMH Cells: 4 hours
- AA Alkaline Cells: 3 hours
Power Requirements:AC Mains 100-120 VAC, 200-240 VAC, 50-60 Hz
IP67 Environmental Ingress Protection Rating
Explosive Atmosphere approved per:MIL-STD-810F, Procedure 1, NFPA 70E, Section 500, Class 1, Div. 2, Group D Shock Tested per: IEC 60068-2-27, 60 g, 6 msec H.S., 3 axes, 18 total
Vibration Tested:Sine Vibration per IEC 60068-2-6, 50-150 Hz @ .03" DA or 2 g, 20 sweep cycles
Drop Tested:MIL-STD-810F 4.5.5 Procedure IV - Transit Drop
Color Transflective Liquid Crystal Display:60 Hz update, user-selectable color schemes and brightness, two split screen modes and one full screen mode.
Display Dimensions:640 Pixels (W) x 480 Pixels (H) 2.95" W (75 mm) x 2.21" H (56 mm), 3.7" (94mm) diagonal
Amplitude Grid Modes:100% or 110% Amplitude Display
Time Base Grid Modes:Standard 0 to 10 division, Soundpath Mode divides Range into 5 equal sections with grid lines, Leg Mode displays Soundpath Legs as grid lines
Square Wave 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 (PRF): Automatically controlled by the instrument software over the range of 10 Hz to 500 Hz. Manual PRF control option available (PN: EPLTC-PRF)
Measurement Rate: 10Hz to 500Hz. Always equal to PRF rate.
Energy Settings:100 to 400 V in 100 V increments
Damping: 50, 100, 200, 400 Ohm
Gain:0 to 110 dB - Two user-defined gain step adjustments and presets above function keys
Total Instrument Bandwidth:0.2 - 26.5 MHz @ -3 dB
Digital Filter Settings:Standard: 0.2 - 10.0 MHz
Broadband: 2.0 - 21.5 MHz
High Pass: 8.0 - 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 +/- 1dB
Reject:0 to 80% full screen height with visual warning
Automated Distance Calibration for Velocity and Zero Offset
Test Modes:Pulse Echo, Dual, or Through Transmission
Units:Millimeters, inches, or microseconds
Range:Base Instrument: 3.36 mm to 6,702 mm (0.132 in. to 263 in.) at 5900 m/s (0.2320 in./ms)
Extended Range Option:(PN: EPLTC-RANGE): 3.36 mm to 13,404 mm (0.132 in. to 527 in.) at 5900 m/x (0.2320 in./ms)
Velocity:0.025 to 0.6000 in/µsec (635 to 15240 m/S)
Zero Offset:0 to 750 µsec
Display Delay: -2.323" to Max Range (-59 mm to Max Range)
Refracted Angle:10° to 85° in 0.1° resolution
Types:Thickness, Soundpath, Projection, Depth, Amplitude, Time-Of-Flight for Gate 1, Gate 2 - Gate 1
GATE 2 option:(PN: EPLTC-GATE2): Allows Echo-to-Echo measurements independent of Gate 2 measurements, and Gate 2 alarms.
Four Measurement Display Locations:User selects up to four measurements from either gate to display on the live screen.
Dynamic DAC/TVG Standard:ASME, ASME III, JIS, and CUSTOM DAC with up to six warning curves. Allows dynamic adjustment of curves with Gain, Dynamic range 110 dB, Slope 100 dB/usec and up to 50 points captured.
Amplitude Measurement:0 to 110% full screen height
X-Value Correction:Removes distance from Beam Index Point to front of transducer from surface distance measurement
Gate 1: Measurement of Echo Height and Time-Of-Flight.
Gate Start:Variable over entire displayed range
Gate Width:Variable from Gate Start to end of displayed range
Gate Height:Variable from 2 to 95% full screen height
Alarms:Positive and Negative Thresholds; Minimum Depth
Zoom: Displayed Range is Gate 1 Width
Epoch LTC -