Ultrasonic Color Waveform Corrosion Thickness Gauge
(A-SCAN) TG330
LIVE COLOR WAVEFORM(A-SCAN).
CONTROL OF GAIN, BLANKING, GATE, RANGE, DELAY, RF AND RECTIFY
MODES.
DYNAMIC WAVEFORM AND THICKNESS COLOR CHANGE ON ALARM.
If the ordinary thickness gauges are incompetent in the rough
applications. Please turn to our TG330, which will maximize
measurement performance for challenging applications and provide
you with the cost-effective measurement solutions.
PRINCIPLES
The ordinary ultrasonic thickness gauge with the principle
pulse/echo method could do the test by the following two
conditions.
1. The first underside echo must be higher than the gate. (The
height of the electrical level
of the gate is unadjustable)
2. No other noise waves before the first underside echo are higher
than the gate.
(Otherwise, we will get the thickness where the noise wave are
produced)
For some conditions, the above situations could not be satisfied,
for example, the highly corrosive near surface, coarse-grain
materials(e.g. cast iron), aluminum, small diameter pipes, super
thin sheet, super thick plate, rough surface, nonuniform inner
structure, defect contained workpiece, lamination and so on which
could not be tested by the ordinary gauges.
TG330 will solve the above problems easily.
1. Make the first underside wave higher than the gate by adjusting
the gain and height of the gate.
2. Invalidate noise waves before the first underside wave by the
function of blanking.
Live Color A-Scan
The user could directly see the color waveform of the ultrasonic
sound (or A-scan) on the screen, which is quite important for the
occasions that we need to check the correctness of the testing
results. Many cases will cause wrong testing results or even no
readings. We could find the causes easily through the A-scan.
Adjust the three parameters of GAIN, BLACKING, GATE, and then we
will get the right readings.
The uses for waveform: testing the correctness of thickness
readings, finding out the causes of impacting the testing, and
adjusting the parameters to solve the problems.
Gain
Adjust the amplification factor of echo signal, increasing and
reducing by 1 dB by hand. It is quite effective for acoustic
attenuation materials (e.g. cast iron).
BLANKING
Invalidate the waves within the red blanking strip, and omit the
useless noise waves that impact the measuring like the waves caused
by the rough surface or nonuniform inner structure.
ADJUSTABLE GATE
The gauge will get the reading only when the wave is higher than
the gate. So the adjustable height of gate is very important,
especially for the applications of low echo signals (e.g. super
thin sheet, super thick plate).
RED ARROWHEAD
A red arrowhead is pointing at the measuring point in A-scan mode,
and the thickness value is the horizontal ordinate of this point.
It will help to judge the correctness of the reading. We will get
the right reading if the red arrowhead is pointing at the advancing
front of the first underside echo.
RANGE
Adjust the wave scope on the screen, and they are visually
compressed or spreaded. Without the correct wave range, the wave
may be out of the screen, but the right reading will still show.
DELAY
Adjust the initial position of the wave on the screen, the wave
will be moved visually. Without the correct wave range, the wave
may be out of the screen, but the right reading will still show.
The functions of RANGE and DELAY could magnify any section of the
wave showing on the screen.
RECTIFICATION MODES
Four modes selectable: RF, Half-Wave Positive, Half-Wave Negative
and Full Wave.
RF: describe the whole echo waveform.
Half-Wave Positive: show the Half-Wave Positive without the
Half-Wave Negative.
Half-Wave Negative: upturn the Half-Wave Negative and dispose of
the Half-Wave Positive.
Full Wave: show both the Half-Wave Positive and upturned Half-Wave
Negative.
ALARM MODE
The high limit and low limit of the Alarm could be set. Dynamic
waveform and thickness reading color change on alarm.
REDUCTION RATE MEASURE
Differential Mode and Reduction Rate Mode are standard Features.
Differential Mode shows the thickness variation from a pre-set
thickness value. Reduction Rate calculates and displays the percent
of thickness reduction after a material thinning process.
MIN./MAX. MODES
On this mode, the current thickness, minimum thickness and the
maximum thickness will be shown on the screen at the same time. You
could drag the probe along the surface of the work, and the minimum
and maximum will be shown automatically on the screen.
Reading in white means couplant well Differential Mode and
Reduction Rate Mode Min./Max.modes, reading in red means alarm
OPTIONAL VERIOUS PROBE
The V-path correction program for several probes is built in the
gauge, including standard probe, small diameter tube probe,
fingertip probe, cast iron probe, and high temperature probe. The
frequency is ranging from 2 to 10MHz, and the size for the crystal
from 4 to12mm.
Generally speaking, transducers with higher frequencies and smaller
diameters allow measurements of thinner or curved parts and enhance
the accuracy of the measurement.
Specifications and Accessories
Operating Principle:
Ultrasonic pulse/echo method with dual-element probes.
Measuring Range:
0.5-508mm; 0.02-20 inch
Depending on probe, material, surface condition and temperature
Unites and Resolution:
mm- 0.01; 0.1
inch- 0.001; 0.01
Display Modes
Digital Thickness Readout
A-scan or Waveform
Min./ Max. Capture
D-Value/ Reduction
V-path Correction:
Automatic V-path Correction,
compensating the nonlinear
characteristic of dual-element
Measuring Error:
±0.05mm (up to 25mm)
±0.2% H (up to 100mm)
±0.5% H (above 100mm)
Note: H is the height of the material.
Repeatability:
±0.05mm
Display Screen:
320×240 dot matrix,
2.4 inch color screen
Measuring Rate :
4 times per second
Material Velocity Range:
500～9999 m/s; 0.0197～0.3937 in/us
Operating Languages:
English
Warranty:
2 years limit
Power Supply:
Two AA alkaline batteries
Operating Time:
More than 36 hours,
with two AA alkaline batteries
Auto Shut-off:
After 5 minutes of non-use
Operating Temperature:
-10℃～+50℃
Specification to -20 on request
Size:
153mm×76mm×37mm (H×W×D)
Weight:
280g, including batteries
Standard Package:
UTG-142 thickness gauge
Standard probe
Carrying case
Two 1.5V AA alkaline batteries
Couplant
Operating manual
Accessories:
Several selectable probes; test block; couplants and high
temperature couplant
