Olympus EPOCH 650 - Table 20 Gate Specifications; Table 21 Measurement Specifications

DMTA-10055-01EN, Rev. A, February 2015
Chapter 13 304
Range 6.67 mm to 26,628 mm (0.262 in. to 1054.3 in.)
Velocity 635 m/s to 15240 m/s (0.0250 in./µsec to 0.6000 in/µsec)
Zero Offset 0 µsec to 750 µsec
Display Delay –65.02 mm to 5,080.75 mm (–560 in. to 200.3 in.)
Refracted Angle 0° to 90° in 0.1° increments
Table 20 Gate specifications
Parameter Va lu e
Measurement gates 2 fully independent gates for amplitude and TOF
measurements
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 threshold, minimum depth (gate 1
and gate 2)
Table 21 Measurement specifications
Parameter Va lu e
Measurement display locations 5 locations available (manual or auto selection)
Gate 1 Thickness, sound path, projection, depth, amplitude,
time-of-flight, min/max depth, min/max amplitude
Gate 2 Same as Gate 1
Echo-to-Echo Standard Gate2—Gate1
Other Measurements Overshoot (dB) value for DGS/AVG, ERS (equivalent
reflector size) for DGS/AVG, AWS D1.1/D1.5 A, B, C and
D values, reject value, Echo to Ref dB values
DAC/TCG Standard
DAC Points Up to 50 points, 110 dB dynamic range
Special DAC Modes 20–80 % DAC, custom DAC (up to 6 curves)
Curved Surface Correction Standard OD or bar correction for angle beam
measurements
Table 19 Calibration specifications (continued)
Parameter Va lu e