Dakota Ultrasonics DFX-7 plus MANUAL2 - Manual (Page 32)

Dakota Ultrasonics
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3.5 TUNE – Menu
MEASURE MODE: Toggles a variety of unique measurement modes for different
application requirements: Coating Off (P-E), Coating On (PECT), Temp Comp
(PETP), Thru Coat (E-E), Thru Verify (E-EV), Coating Only (CT). Refer to page 37
for further info.
POLARITY: The DFX-7 operates on a zero crossing detection principle. This
feature toggles which stroke of the cycle the crossing detection uses, either positive
or negative. Refer to page 115 for further info.
PULSE: The DFX-7 has an adjustable pulse width for both high penetration and
resolution applications. The pulse width refers to the duration of time the pulser is
on. The options are Spike, Thin, and Wide. Refer to page 117 for a further
explanation.
PULSER VOLTAGE: This feature offers a 50 volt cut/boost to the pulser. The
standard setting is 150 volts. This enables the DFX-7 to offer greater penetration for
difficult material types, or increased resolution on noisy materials. Refer to page 118
for a further explanation.
DAMPING: Provides the user with multiple input impedances to match the
impedance of the transducer, and optimized overall transducer performance. Refer
to page 119 for further info.
GAIN: The DFX-7 has 100dB gain range from (-30 to 70 dB), used in conjunction
with the attenuator feature above. This feature is used to increase/decrease the
power or amplitude of the signal. This might easily be considered as similar to
turning the volume up or down on a stereo receiver. Refer to page 74 for further info.
AGC: This an automatic gain control used in E-E (echo-echo), and E-EV (echo-echo
verify). The DFX-7 is equipped with an automatic gain control when operating in -E
(echo-echo), and E-EV (echo-echo verify) modes only. This feature automatically
increases/decreases the power or amplitude of the signal, to an optimal input to
output signal ratio. This might easily be considered as similar to turning the volume
up or down on a stereo receiver. Alternatively, the AGC can be manually controlled.
The DFX-7 is equipped with manual override, using an arbitrary range of 1-20 clicks.
The higher the number the better the dynamic gain range, and visa versa. Refer to
page 74 for further info.