Olympus 38DL PLUS User Manual

DMTA-10004-01EN, Rev. D, November 2016
Chapter 12 216
Figure 12‑3 Illustration of the V‑path
When you connect an Olympus standard D79X series dual element transducer, the
38DL PLUS automatically recognizes it and recalls the appropriate default setup and
V-path correction. The 38DL PLUS also includes a function to build a custom V-path
compensation for almost any other dual element transducer. This compensation curve
is saved and recalled along with a custom setup.
12.4.1 Activating the V-Path Function
You need to activate the V-path function to be able to build a V-path correction curve.
To activate the V-path function
1. Press [SETUP MENU].
2. In the menu select MEAS.
3. In the MEAS screen, set VPATH CAL ENABLE to ON.
4. Press [MEAS] to return to the measurement screen.
12.4.2 Building a V-Path Correction Curve for a Nonstandard Dual Element
Transducer
Creating a custom V-path requires a multi-step test block representing the thickness
range and material to be tested (minimum and maximum thicknesses). You need to
measure on at least three test block steps. You can use up to ten known thicknesses to
generate a V-path correction curve. Using more V-path calibration points improves
the accuracy of the measurements.

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