Olympus 38DL PLUS User Manual

DMTA-10004-01EN, Rev. D, November 2016
Custom Setups for Single Element Transducers 229
Figure 13‑7 Comparing pulser power set to 60 V and 200 V
13.6 Time-Dependent Gain Curve
With single element transducers, the 38DL PLUS either uses the automatic gain
control (AGC) [see “Configuring Measurement Parameters” on page 127 for details
on how to activate the AGC] or the time-dependent gain (TDG) functions to
automatically adjust receiver gain to an optimum level when an echo is detected.
The 38DL PLUS offers three parameters to draw a time-dependent gain curve: INIT
GAIN, TDG SLOPE, and MAX GAIN (see Figure 13-8 on page 230). From the initial
gain level, receiver gain slopes up to the maximum gain level at the rate determined
by the TDG SLOPE setting. When you adjust any of the received gain parameters, a
black time-dependent gain curve is displayed so that you can clearly see the zones of
initial gain, slope, and maximum gain.
Initial pulse
Initial pulse

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