YUSHI UM-5 Series User manual

Color Waveform
Ultrasonic Thickness Gauge
UM-5 Series
Operating Manual
YUSHI INSTRUMENTS
CONTENT
1. General Introduction............................................................................. 1
1.1 Construction of The Gauge ..............................................................2
1.2 Standard Configurations ..................................................................3
1.3 Optional Configurations .................................................................. 3
1.4 Specifications ...................................................................................4
1.5 Main Fuctions .................................................................................. 5
2. Keyboard Functions.............................................................................. 6
3. Measuring Thickness............................................................................ 6
3.1 Instrument Calibration .....................................................................6
3.2 Preset Other Specifications ..............................................................9
3.3 Normal Mode .................................................................................13
3.4 A-scan Interface Mode ...................................................................15
3.5 Real Cases Analysis of A-Scan ..................................................... 17
3.6 Operation of B-scan Interface ....................................................... 19
3.6.1 B-scan Display ....................................................................19
3.6.2 Introduction of B-Scan ....................................................... 19
3.7 Dual-echo (Thru-coating) Mode ................................................... 20
3.7.1 A-scan Interface in Dual-echo Mode ................................. 20
4. Data Storage Function........................................................................ 21
4.1 Thickness Value and Waveform Storage ....................................... 21
4.2 Browing The Stored Data .............................................................. 22
5. Measurement Applying Skills .......................................................... 22
5.1 Measuring Error Prevention .......................................................... 22
5.2 Measuring Methods ....................................................................... 23
5.3 Pipe Wall Measurement .................................................................24
5.4 Cast Measurement ......................................................................... 24
6. Care and Maintenances ...................................................................... 25
6.1 Power Source Inspection ............................................................... 25
6.2 Considerations ............................................................................... 25
6.3 Maintenances ................................................................................. 26
Appendix: Sound Velocities of Common Materrials....................... 27

1. General Introduction
UM-5 series ultrasonic thickness gauge adopts 2.4 inch color 320*240 dot
matrix LCD screen. Launch the ultrasonic through one side of the test material,
measure the digitized thickness real-timely, without cutting the object. As a
ultraminiature measuring gauge, is researched and developed by our company
according to the ultrasonic measuring theory. The features include fast ,
non-destruction and precise measuring. In addition, A/B-scan waveform
display is available by showing the echoes, which enables the more extensive
measure range, more precise result and very little measurement error and
finally makes the measuring processes more controllable.
UM-5 series ultrasonic thickness gauge, as the essential NDT instrument,
can be widely applied in the detecting fields like manufacturing, metal
processing, aerospace,railway traffic,chemical industry, commercial inspecting
and so on. It can not only precisely measure various kinds of panels and
processing components but also monitors the thickness minus of tubes and
pressure vessels in the manufacturing instruments after corrosion.
1.1Construction of The Gauge
1 2

1.2 Standard Configurations
NAME
NUMBER
THICKNESS GAUGE
1
PROBE
1
PROBE CABLE
1
ALKALINE BATTERY
2
RUBBER SHEATH
1
COUPLANT BOTTLE
1
CARRYING CASE
1
OPERATING MANUAL
1
USB CABLE
1(ONLY UM-5DL)
SOFTWARE CD
1(ONLY UM-5DL)
1.3 Optional Configurations
HIGH-TEMPERATURE PROBE
CAST IRON PROBE
SMALL PROBE
MINI PROBE
PROBE CABLE
STEP CALIBERATION BLOCK
RUBBER SHEATH
STORAGE OPTION(ONLY UM-5)
Probe and Measuring Range
1.4 Specifications
Display Type
2.4" color 320 × 240 dot-matrix LCD screen
Operating Principle
Ultrasonic pulse echo and echo- echo method with
dual element transducer
Measuring Range
0.5mm to 508mm(0.025" to 20.00"), depending on
material, probe and surface condition
Measuring Resolution
Selectable 0.01/0.1mm(0.001"/0.01")
Measuring Error
±0.05mm (H＜10mm)
± (0.5%H+0.01)mm (H≥10mm)
Note: H is the thickness of the measured object
Measuring Limits of
Tube (Steel)
Φ20mm×3.0mm(PT-08 probe)
Φ15mm×2.0mm(PT-06 probe)
The measuring error is within ±0.1mm
Units
Inch or Millimeter
Rectify Modes
RF+, RF-, HALF+, HALF-, FULL
Display Mode
Thickness Value, Min. / Max. capture, DIFF/RR%,
A-Scan, B-Scan
V-Path Correction
Automatic,compensate the non-linearity of dual
element probe
Update Rate
Selectable 4Hz, 8Hz, 16Hz
Material Velocity Range
500 to 9999m/s (0.0197 to 0.3937in/us)
Languages
Selectable Chinese, English, Germany, French,
Japanese,etc.
Alarm Settings
Minimum and Maximum alarms. Dynamic waveform
color change on alarm
Power supply
Two 1.5V AA batteries, 24 hours standby time
Instrument Shut-off
Optional Automatic shutdown or manual shutdown
after no operation for 5, 10, or 20 minutes
Operating Temperature
-10°C to +50°C (+10°F to +120°F), special
requirements up to -20℃
Size
153mm × 76mm ×37mm(H ×W ×D)
Weight
280g including batteries
Warranty
1 year
Probe Type
Frequency
(MHZ)
Contact Area
Diameter
Measuring Range
（in the Steel）
Allowable
Contact
Temperature
Cast Iron Probe ZT-12
2
17mm
(4.0～508.0)mm
(-10～60)℃
Standard Probe PT-08
5
11mm
(0.8～100.0)mm
(-10～60)℃
Standard Probe TC510
5
13.5mm
(1.2～200.0)mm
(-10～70)℃
Composite Crystal
Probe TC550
5
13.5mm
(1.2～200.0)mm
(-10～70)℃
Small Tube Probe
PT-06
7.5
8.7mm
(0.8～30.0)mm
(-10～60)℃
Miniature Probe PT-04
10
7.0mm
(0.7～12.0)mm
(-10～60)℃
High-Temperature
Probe GT-12
5
15mm
(4.0～80.0)mm
480℃below
3 4

1.5 Main Fuctions
1. Parameter configuration interface is simple and easy to operate.
2. Adjustable Live A-scan waveform display, control of Gain, Blanking, Gate,
Range and Delay etc.
3. Time-based B-scan function, displays a cross section of the test piece, for
observing the underside outline of the workpiece.
4. Numerical view, display thickness values with big digit.
5. Thickness alarm: programmable High-Low alarm set point with dynamic
change thickness value’s color.
6. Limit value mode: catching the minimum and maximum values when
measuring.
7. Difference mode: getting the difference between the actual value and the
normal value as well as the percentage of difference value and normal value.
8. Selectable units of mm and inch.
9. Optional resolution: ×.×× mm /×.×mm; ×.××× inch / ×.×× inch.
10. Optional waveform style: outline mode or fill mode
11. Optional rectification mode: RF+, RF-, full wave, half +, half -
12. Language: Chinese, English, German, French, and Japanese,
multi-languages available.
13. Approx. battery life: 24hours.
14.Great capacity data storage function: Stores 100,000 thickness
values&1000 waveforms(only UM-5DL).
15.Measure the net thickness of the workpiece through the coating layer (only
UM-5D&UM-5DL).
2.Keyboard Functions
There are 9 keys on the keyboard totally, including 3 virtual function keys
( ), four direction keys ( ), two
specialized function keys ( ). See the following illustration (2.1)
2.1 KEYBOARD FUCTION ILLUSTRATION
3. Measuring Thickness
3.1Instrument Calibration
Before using UM-5 series, the instrument and probe must be calibrated.
Purpose of calibration is performing probe zero procedure and obtain the
sound velocity of the material being tested. And it’s important to set up the
correct probe model firstly before the calibrating process. UM-5 series’
calibration divided in to the following:
1.Probe zero procedure：Use the zero block on the instrument to set up the
probe zero procedure.
2.One point calibration：Use the zero block on the instrument to set up the
probe zero procedure first, then obtain the velocity from the test block of
known thickness.
3.Two point calibrations ：Calibrate the probe zero and the velocity of test
block from two known thickness and same material standard blocks.
5 6

4. Dual Echo calibration：Calibrate the velocity from the test block of known
thickness.
5.Setting the velocity manually：If the material velocity is known, for example
the velocity of steel is 5900m/s. The sound velocity can be setting manually.
3.1.1 Probe zero calibration
Note: The calibration result is 4.00mm, only under the sound velocity of
5900m/S.
3.1.2 One point calibration
3.1.3 Two point calibration
3.1.4 Dual Echo calibration
7 8

3.1.5 Velocity adjusting steps
3.1 Velocity adjusting steps
Attention 1: Measure the standard block before the calibration, to ensure that
the current setting of instrument parameters can measure the standard test
block correctly.
Attention 2: Probe zero calibration, one point calibration and two point
calibration are suitable for single echo mode, dual echo calibration is suitable
for dual echo mode.
3.2 Preset Other Specifications
Press MODE to enter the specification configuration interface, which
including many specification adjusting options like FILE NUMBER,
MEASURING MODE, VIEW MODE, PROBE SETUP, MINIMUM ALARM,
MAXIMUM ALARM, NORMAL THICKNESS, THE MINIMUM OF B
SCAN, THE MAXIMUM OF B SCAN, RECTIFICATION,
RECTIFICATION WAVEFORM, RESOLUTION, UPDATE RATE,
LANGUAGE, UNITS, AUTO POWER DOWN,ERASE ALL FILES AND
DEFAULT SETUP. See the following figure:
3.2 SPECIFICATION ADJUSTING STEPS
FILE NUMBER – Select the current file. Total 400 files, and each file could
save 252 thickness values or waveforms.
MEASUREMENT MODE - Single echo and dual-echo mode. Single-echo
mode is used for common measurement; dual-echo mode is used for through
coating function.
VIEW MODE: normal mode, difference mode and limit scanning mode.
PROBE SETUP: selectable many probe models, including:
9 10

TC510 (standard probe)
TC550 (composite crystal probe)
PT-08(standard probe)
PT-06(small tube probe)
PT-04(miniature probe)
GT-12(high-temperature probe)
ZT-12 (cast iron probe)
NULL(Other probes)
MINIMUM ALARM: Set the minimum thickness alarm value, range of
0.15-635mm. The result will be displayed in red if the actual thickness is less
than the minimum value preset.
MAXIMUM ALARM: Set the maximum thickness alarm value, range of
0.15-635mm. The result will be displayed in red if the actual thickness is more
than the maximum value preset.
NORMAL THICKNESS: Set the normal thickness, range of 0.15-635mm.
The real concrete application will be introduced in the DIFFERENCE MODE.
MINIMUM OF B SCAN: Set the minimum thickness of the B scan.
MAXIMUM OF B SCAN: Set the maximum thickness of the B scan.
RECTIFICATION MODE: RF+, full wave, half -, half +, RF-. RF describes
the complete echo waveform; full wave indicates the half + echo and the
overturned half - echo; half – means putting off the half + echo and turn the
half – over to +; half + means putting off the half – echo and only left the half
+ echo. RF- indicates the phase waveform of RF+.
3.3 HALF-WAVE POSITIVE
RECTIFICATION WAVEFORM: outline mode and filled mode.
RESOLUTION: Set the decimal digits of the measurement result. Metric of
×.×and ×.××and imperial of ×.×× and ×.×××.
UPDATE RATE: Update the rate of measurement result. Optional 4Hz, 8Hz
and 16Hz.
LANGUAGE:Chinese/English/German/French/Japanese languages are
available
UINTS: Selectable units of mm/inch.
AUTO POWER DOWN: The instrument automatically shuts down after a
certain period of time without operation, which can be 5 minutes, 10 minutes,
20 minutes or manual shut down only.
DELETE ALL FILES –Empty the thickness readings and waveform of all
files.
DEFAULT SET UP –Set all parameters to their factory default value.
11 12

3.3 Normal Mode
UM-5 series have three measuring interface: normal mode, A-scan interface,
B-scan interface. And there are three display modes of normal interface:
Thickness value mode, difference/rate-of-reduction measurement mode, MAX.
/MIN. measurement mode. Select in the “VIEW MODE” of
CONFIGURATION.
ATTENTION: When the probe and the object are not completely coupled, the
font in the various interfaces are in GREEN, when properly coupled, they are
displayed in WHITE color and when the either the upper or lower limited are
exceeded, the front are displayed in RED color.
THICKNESS VALUE MODE: the default interface. This interface mainly
shows the present thickness value with large digits.
3.5 NORMAL MODE INTERFACE
1—the present thickness value 2—probe types, gain degree, single-echo, measuring
units 3—material velocity 4—battery power display 5—A—scan interface
DIFFERENCE/RATE-OF-REDUCTION MODE: The interface displays the
difference (difference between measured and nominal thickness) and reduction
(difference as a percentage of nominal thickness), as well as the current
measured and nominal thickness values. Before using this mode, presetting the
nominal thickness is needed. The method can be taken according to chapter
3.2
3.6 DIFFERENCE MODE INTERFACE
1—the difference between the nominal value and the measured value
2—the ratio between the difference and the nominal value 3—the currently
measured thickness value 4—the nominal value 5—difference signal
6—material velocity 7—battery power 8—A—scan interface 9 -- probe type,
gain degree, single echo, measurement unit
LIMITS VALUE SCANNING MODE: This mode allows the user to catch the
real-time maximum and minimum thicknesses when test the thickness of
material continuously. It shows the minimum and maximum values during the
testing as well as the currently thickness. Press the RESET relevant to get the
limits when measuring the thickness.
3.7 LIMITS VALUE MODE INTERFACE
1—the current measured value 2—the maximum value
3—the minimum value 4—unit
5—material velocity 6—battery power 7—A—scan interface 8—reset
13 14

3.4 A-scan Interface Mode
In this mode, users could view the current thickness value and the A-scan
waveform at the same time. The right side of the interface is the specification
adjusting area, in which the specifications can be adjusted and finally solve
various difficult and complicated thickness measuring applications to the
capacity.
3.8 A-SCAN MODE INTERFACE
3.8 -SCAN INTERFACE MODE
1—waveform display area 2 —gate 3 —material velocity 4 —the
magnifying selected specification 5 —measuring point( the first point of
intersection between the waveform and the gate) 6 —the present thickness
value 7—the blank confines 8—the beginning coordinate on the screen 9—the
specification adjusting area 10—the selected specification 11—large digits
mode 12—specification selection 13—battery power
Attention: when the probe and the object are not complete coupled, the font in
the various interfaces are in GREEN, while if they coupled well, in WHITE
color and when the either the upper or lower limited are exceed, the font and
waveforms are displayed in RED color.
In the A-scan interface, press the bottom right button NEXT to
highlight the value to be adjusted. Then press the direction keys to adjust the
values. Up and down keys are used for small increments, while left and right
for large increments.
GAIN —Adjust the amplification of echo signal by instrument to allow
manual increase or decrease in ldB. This function is very useful for the testing
of attenuation materials (like metal cast).
RANGE —Adjust the range of waveform that the screen displays. The
waveform can be compressed or spread visually and it’s invisible if the
display range is set incorrectly and the echo waveform is beyond the display
area, however, the testing value can also be read correctly.
DELAY —Adjust the starting position of the waveform on the screen. The
waveform will move horizontally adjusting this value, and it’s invisible if the
delay is set incorrectly and the echo waveform is beyond the display area,
however, the testing value can also be read correctly.
BLANK—Hide the unnecessary and useless clutter in front of the main waves.
The red line on the bottom of the screen shows the blank confines. The
adjusting blank confines are the present range confines. In the real testing,
wrong measurement due to the material may exist, such as near surface serious
corrosion, AL material, inside defects, uneven component, lamination
structure and so on. While adjusting the gain or gate can solve part of the
problem, but only blank function can avoid the mistake when those clutter
echoes are higher than the bottom echoes.
15 16
3.9 The waveform before blanking
3.10 omit the front noise waves by blanking

GATE —adjusting the height of the gate.Only when the waveform is higher
than the gate, the gauge can take the echo and show the value. Attention: this
will only show when the GATE specification is highlighted. The first
intersection point between the waveform and gate is pointed by a red arrow,
which can help judging whether the thickness value is correct (the red arrow
should point the front of the first bottom echo if correctly tested).
3.5 Real Cases Analysis of A-Scan
1. When measuring the thickness, it’s possible that that over small gains
prevent the precise results. As showed in the following figure, the thickness of
the testing object is about 5mm, but as for the very small gain, the measuring
result is 10.77mm as the first echo has not broken the gate and the gate locates
the second echo automatically. This is obviously an incorrect result, and
customer can pull up the echo by enhancing the gain setting to make the first
echo brake through the gate to achieve the correct measurement.
3.12 REAL CASE 1
2. There are some defects in the testing object, and the gate locks the defect
echoes. As showed in the following figure, the thickness of the testing object
is about 10mm, but as there are obvious defects (the defect echoes are showed
on the display) and the gate locks the defect echoes which have broken the
gate, thus, the testing result shown is the thickness of the defect area. The right
measurement can be realized by adjusting the gate setting above the defect
echoes.
3.13 REAL CASE 2
3. If there are some surface faults in the testing object and the gate locks the
defect echoes, the measuring result will be the thickness of the defect area. In
this condition, the customer can use the BLANK function to get the correct
testing result. As showed in the following figure, the line on the bottom of the
screen, which we use to shield the defect echoes, indicates the blank confines
and makes the gate not catch the echoes within the blank confines, thus, the
right thickness value is acquired.
3.14 REAL CASE 3
17 18
3.11 waveform of the 0.02in sheet by PT04

3.6 Operation of B-scan Interface
3.6.1 B-scan Display
3.15 B scan interface diagram
1-B-scan image display 2-White pointer 3-Red triangle (display the min.
thickness value) 4-The thickness value of the pointer position 5-The
minimum thickness value in B-scan 6-The maximum thickness value in B-scan
7-Erasing the current B-scan images and measurements 8-Enter the numerical
measurement interface 9-Sound velocity 10-The minimum thickness value on
the B-Scan image 11.Parameter display area 12.Gain value
3.6.2 Introduction of B-Scan
UM-5 Series thickness gauge has time-base B-scan function. Move the probe
along the workpiece surface, then the cross-sectional profile of the workpiece
display, use for observe the underside contour of the workpiece.
When remove the probe from workpiece, it could be automatically capture a
minimum value of the B-scan image, and indicate the position of the
minimum by a red triangle. The thickness value of any point in the B-scan
image can be viewed by moving the white pointer.
3.7 Dual-echo (Thru-coating) Mode
Having coating or paint layer on the surface of the workpiece, it will bring
considerable error to the measurement results. UM-5D and UM-5DL have the
echo-echo measurement method, which can accurately measure the actual
thickness of the substrate under the workpiece coating without grinding the
coating and other processes that destroy the workpiece surface. This function
is achieved by measuring two successive bottom echoes of the substrate.
Press into parameter configuration interface, set the measurement mode
to dual-echo and press again back to thickness measurement interface.
And then user can measure the thickness through coating.
3.7.1 A-scan Interface in Dual-echo Mode
The menu options on the right side have changed of A-scan interface under
echo-echo mode, added E-blanking option, and canceled GATE option. The
blue strips area indicate the length of echo-blanking when measuring, the
waveform above the blue strips is invalid. See following figure 3.16.
Figure 3.16 A-scan interface in dual-echo mode
1. identification of dual-echo measurement mode 2. Blue arrow indicate the
secondary echo 3. E-blanking 4. Blue line: the length of echo-blanking
5. Red line: the length of initial-blanking 6. Red arrow indicate the first echo
Blanking in the dual-echo mode:
19 20

1. Initial-blanking: red blanking line indicated on the screen, starting at zero,
so named initial blanking. Waveform with the scope of red strip is invalid, for
omitted the clutter between the starting point and an echo.
2. E-blanking (echo-blanking): blue blanking line indicated on the screen,
only appearance when success measuring. Starting at the first echo
measurement point, so named echo-blanking. Waveform within the scope
of blue stripe is invalid, for omitted the clutter between the first echo and
secondary echo.
NOTE: This instrument is not require zero calibration in the dual-echo
measurement mode. For zero calibration, please enter the single-echo
measurement mode.
4. Data Storage Function
UM-5DL adopts the storage mode of microgrid format(the follow Figure4.1),
it can save one hundred thousand thickness values and one thousand A/B-scan
waveforms, waveforms and thickness values can be mixed stored in the same
file.The measurement data files can be transferred from the instrument to a PC
via USB communication generate EXCEL or TXT format files.With powerful
Data View PC software, Data statistics, analysis, archiving, printing reports
and other operations.
4.1 Thickness Value and Waveform Storage
Figure 4.1 GRID FORMAT STORAGE MODE
1—storage file name 2—line serial number 3—column serial number
4—data in stored 5—back to the previous menu 6—save the current
thickness value 7—delete the selected data 8— The current cell selected
Whether it is in the interface of thickness value, A-scan or B-scan, the current
measured thickness values will be stored for short press SAVE, and the current
waveform will be stored for long press SAVE for 3 seconds. A-scan waveform
will be stored in the A-scan interface, and B-scan image will be stored in the
B-scan interface.
4.2Browing The Stored Data
In the parameter configuration interface, select the "File Number" parameter
and press the "Open" key to open the current grid storage file. The thickness
value is intuitively displayed in the grid. A-scan waveform and B-scan
waveform are represented by ASCAN and BSCAN respectively. After
selecting the waveform cell with the highlighted rectangular box, press
to view the stored waveform.
5. Measurement Applying Skills
5.1 Measuring Error Prevention
1. MATERIAL INFLUENCE
In many materials like nonmetal or plastic, the change of velocity is obvious,
thus, the accuracy of measuring is influenced. If the material of the object is
not isotropic, the velocity varies in different directions. In this condition, the
preset velocity should be the average value among the testing range.The
average value is obtained by measuring reference blocks whose velocity is
comparable to the average velocity of the block to be tested.
2. ULTRA-THIN MATERIAL
When the thickness of the testing object is below the minimum value of the
probe limit, the result may be incorrect, when necessary, the minimum limit
thickness can be measured by the test block comparison method.
21 22

When testing ultra-thin materials, sometimes ‘’double refraction’’ happens,
which is a kind of incorrect result and the result is twice of the real one.
Another incorrect result called ‘’pulse envelope, cycle jump’’, which means
that the testing result is higher than the real one. In order to prevent this kind
of error, when testing the object with the appropriate thickness as the
minimum limit and judgment is available, customer should pay attention to the
waveform displayed and adjust the gain or use blank function.
3. SURFACE CLEANING INFLUENCE
Before measuring, all the dust, dirt and corrosion should be cleaned and the
cover like paint should be removed.
4. ROUGHNESS INFLUENCE
The extremely rough surface may arouse measuring error or even no reading,
therefore, the surface of the material should be smooth before measuring
through polishing, filing, grinding or using high-viscosity couplant.
5. SURFACE OF THE ROUGH MACHINE PROCESSING
The regular slugs after rough machine processing (such as lathing or planning)
on the surface of the work-piece may also arouse measuring errors. Except for
the compensation methods mentioned above in 4, adjusting the angle between
and sound insulating wall (the metal film through the center of the probe
bottom) of the probe and the slugs of the material and making them
perpendicular or parallel with each other to get the minimum reading as the
thickness value is also efficient.
5.2 Measuring Methods
1. SINGLE-POINT MEASUREMENT
Using the probe to measure a random point on the surface of the object, the
reading displayed is the thickness value.
2. DOUBLE-POINT MEASUREMENT
Measuring twice at the same spot on the object, and making the probe inclines
90°in the second measurement, the thinner reading is the thickness value.
3. MULTIPLE-POINT MEASUREMENT
When the reading is unstable, measuring several times within a circle with a
certain point as center and 30mm as diameter, the thinnest reading is the
thickness value.
4. CONTINUOUS MEASUREMENT
Taking continuous measurements along a specified path at intervals of 5mm or
less according to the single measurement method, the thinnest reading is the
thickness value.
5.3 Pipe Wall Measurement
During the measurement, the probe split surface can be measured along the
axis of the pipe or the axis of the vertical pipe. At this time, the reading on the
screen will have regular changes, and the minimum value in the reading will
be selected as the accurate thickness of the material. If the pipe diameter is
large, it should be measured in the direction of the vertical axis. If the pipe
diameter is small, two measurement methods along the axis direction and the
vertical axis direction are selected, and the minimum value in the reading is
taken as the thickness value of the workpiece.
5.4 Cast Measurement
It’s difficult to measure cast work-piece because there are some special
features of the cast measurement: the rough grain of cast material, the loose
structure, and the rough surface measuring status. So there are some tips to
follow:
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1. Use low frequency probe like ZT-12 in our company.
2. When measuring the non-processing surface of some cast work-piece, high
viscosity couplant such as machine oil, grease or water glass is needed.
3. Calibrate the sound velocity with the standard block which shares the same
material and same measuring direction with the testing object.
6. Care and Maintenances
6.1Power Source Inspection
During the usage of the gauge, the current battery power will be shown on
the display, when the battery power is low, the customer should change
the batteries promptly so that the measuring accuracy won’t be
influenced.
The steps of changing batteries are as follow:
1.Turn off the gauge.
2.Loosen the screws on the back of the units and remove the battery cover.
3.Take out the batteries and replaces with new ones. Pay careful attention to
polarity.
Attention: The battery should be removed when the instrument is not in use
for a long time, because there is weak energy consumption even in the
shutdown state. After a long time, the gauge will not be turned on after
running out of power.
6.2Considerations
1. Please be cautious of the zero block’s getting rust as couplant will be spread
on the surface of it when calibrating the gauge. After using, clean the zero
block. Avoid dripping sweat on the gauge in high temperature. Some grease
spreading on the surface of zero block is useful to avoid rusting if the gauge
will be spared for long. Wipe the grease out when reusing.
2. Be sure to avoid any caustic liquid such as alcohol or viscous fluids to
prevent corrosion to the cover and the display window, clean with water only.
3.Avoid scratching the surface of the probe. A worn probe will cause unstable
readings,probe should be replaced.
6.3 Maintenances
Contact with the maintaining department of our company if the following
problems appears:
1. Components damage and the gauge fail to measure.
2. The display of the screen is disordered.
3. The measuring error is abnormally big in normal situation.
4. Keyboard operating is disordered or keyboard doesn’t work.
As the UM-5 series ultrasonic thickness gauge is high-tech product, the
maintaining work should be made by professional operator and please avoid
self-acting operations.
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Appendix: Sound Velocities of Common Materrials
Material
Sound Velocity
Inch/µS
M/s
Aluminum
0.250
6300
Alumina Oxide
0.390
9900
Beryllium
0.510
12900
Boron Carbide
0.430
11000
Brass
0.170
4300
Cadmium
0.110
2800
Copper
0.180
4700
Glass(crown)
0.210
5300
Glycerin
0.075
1900
Gold
0.130
3200
Ice
0.160
4000
Inconel
0.220
5700
Iron
0.230
5900
Iron (cast)
0.180
4600
Lead
0.085
2200
Magnesium
0.230
5800
Mercury
0.057
1400
Molybdenum
0.250
6300
Monel
0.210
5400
Neoprene
0.063
1600
Nickel
0.220
5600
Nylon, 6.6
0.100
2600
Oil (SAE 30)
0.067
1700
Platinum
0.130
3300
Plexiglass
0.110
1700
Polyethylene
0.070
1900
Polystyrene
0.0930
2400
Polyurethane
0.0700
1900
Quartz
0.230
5800
Rubber, Butyl
0.070
1800
Silver
0.140
3600
Steel, Mild
0.233
5900
Steel, Stainless
0.230
5800
Teflon
0.060
1400
Tin
0.130
3300
Titanium
0.240
6100
Tungsten
0.200
5200
Uranium
0.130
3400
Zinc
0.170
4200
Note: The above table is for reference only. For actual sound velocity
calibration, refer to section chapter 3.1
27