Epson USN 52L, USN 52R manual Straight-beam probe with delay

USN 52R/USN 52L calibration Operation

–Increase ZERO until the correct sound path value for the echo is displayed.

Example:

–Carry out calibration on a 25 mm thick test piece for a calibration range of 100 mm.

–Set RANGE to 100 mm

–Set ZERO to 0.000 s

–If possible, when in MTL VEL, set an approximate value for the sound velocity

–Set MEASURE to MULTECHO

–Adjust the gates so that the first echo is evaluated in Gate a and the second in Gate b.

Attention: Be careful of node errors when setting the threshold!

–Adjust the sound velocity MTL VEL until the displayed reading (sound path between the two backwall echoes) corresponds to the actual thickness of the test object. If necessary, you have to readjust the gate parameters.

–Set MEASURE to 0 TO 1st

–Increase ZERO until the correct sound path for the echo in the gate is displayed.

Straight-beam probe with delay

Calibration with straight-beam probes, which have a greater delay path, mainly corresponds to the above calibration for straight-beam probes which only have the protection layer as a delay path.

Unlike the above procedure, you have to start by mak- ing the following adjustments:

–Set DELAY and ZERO to 0

–Preadjust ZERO so that the first interface echo is at the zero point of the scale.

–Adjust RANGE so that, with a known sound velocity, the first interface echo and at least the first backwall echo appear, and, with an unknown sound velocity, at least two backwall echoes appear before the second interface echo.

–From this point, proceed the same as for both previous cases.

Krautkramer USN 52R/USN 52L Issue 05, 02/00 5-19