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09
－
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10
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12
、
Technology of measurement
Divergence chart of menu functions:
Refer to the divergence chart of menu for other functions(as
shown below).
Probe label: 5Md10, 5Md6, 2.5M, H.T (high temperature)
File label: F1 ~ F5 (WT100A), F1 ~ F15 (WT130A)
Storage label: Hand.S (manually saved), Auto.S (automatically
saved)
Measurement
Sound speed
Unit
Resolution
Selection among various materials and
sound speed / customizable
Probe
Limit value
Limit value
Sound of Limit value (switch)
Adjustment setting of high/low limit value
Storage
Select file
View file
Delete file
Select file
Select file to view
Select file to delete
Chart
Documents 1, 2, 3...
View data of selected file
Setting
Language selection
On/off of button sound
Chinese/ English
2, 5, 10, 30 minutes / never
Automatic shutdown time
On/off of backlight highlight
Select color
Software version
Restore factory setting
5M
-
d10
5M
-
d6
(
WT130A
)
2
.
5M
(
WT130A
)
High temperature
（
WT130A
）
Blue, orange, green, purple, gray
View software version
Yes/No
11
、
Instruction of other functions
12.1. Clean surface
Before measurement, all the dust, dirt and rust on the surface
of the object to be tested should be cleaned, and the covering
such as paint should be removed.
12.2. Reduce roughness
Excessively rough surfaces can cause measurement errors or
no readings on the instrument. Before measurement, the
material surface should be as smooth as possible through
sanding, grinding, polishing, rasping, or using high-viscosity
coupling agent.
12.3. Surface made by crude machinery:
Regular fine grooves on surfaces made by crude machinery
(such as lathe or planer) can also cause measurement errors,
and the correction way is the same as 12-2; besides, adjust the
angle between the crosstalk spacer of probe (metal folium in the
middle of the probe bottom) and the fine groove of the tested
material (orthogonal or parallel) may also achieve better results.
12.4. Measurement of cylindrical surface:
To measure cylindrical objects, such as pipes, oil drums and
so on, it is important to adjust the angle between the crosstalk
spacer of probe and the axis of the tested material. Briefly,
coupling the probe to the tested material, the crosstalk spacer of
probe is parallel or perpendicular to the axis of the tested
material. Slowly move the probe perpendicular to the axis of the
tested material, and the readings on the screen will change
regularly. Select the minimum value among readings as the
accurate thickness of the material.
The criterion for selecting the direction of the crosstalk spacer
of probe and the axis of the tested material depends on the
curvature of the material. For the pipe with larger diameter, the
crosstalk spacer of probe should be perpendicular to the axis of
the pipe; for the pipe with smaller diameter, the crosstalk spacer
of probe can be either parallel or vertical to the axis of material.
The minimum reading is selected as the measured thickness.
