Olympus 38DL PLUS User Manual

DMTA-10004-01EN, Rev. D, November 2016
Chapter 13 228
measuring the length of bolts or the thickness of gel coat over fiberglass (see
Figure 13-6 on page 228). In these cases, to help stabilize the echo detection and
thickness measurements, select the first peak algorithm to detect the first of several
peaks of similar amplitudes (see step 5.c in “Creating a Custom Setup for a Single
Element Transducer” on page 221).
Figure 13‑6 Detection of the first or the second negative peak
13.5 Pulser Power
You can set the excitation pulse (main bang) voltage to one of the following values:
60 V, 110 V, 150 V, and 200 V.
Higher voltages may provide greater penetration at the expense of a lower near-
surface resolution, especially in mode 1. Inversely, lower voltages may provide better
near-surface resolution at the expense of a lower penetration.
For most applications, the 110 V value provides the best signal-to-noise ratio for
returning echoes. The pulser power indicates the voltage used to excite the transducer
and therefore, affects the size of the initial pulse (see Figure 13-7 on page 229) and the
amount of energy going into the material.

Olympus 38DL PLUS Specifications

General

Operating Temperature	-10 °C to 50 °C (14 °F to 122 °F)
Data Logger	Yes
Interface	USB, RS-232
Thickness Range	0.08 mm to 635 mm (0.003 in. to 25 in.) depending on material and transducer
Display	Backlit LCD
Battery Type	Three alkaline or NiMH AA cells
Pulser	Adjustable square wave pulser
Receiver Bandwidth	0.5 MHz to 20 MHz
Languages	English, French, German, Spanish, Italian, Russian, Japanese, Chinese
Resolution	0.001 mm or 0.0001 in.
Transducer Frequency	2 MHz to 30 MHz
Material	Plastic housing