SADT SA40+ Ultrasonic Thickness Gauge Instruction Manual

SADT SA40+ Ultrasonic Thickness Gauge

Product Information

The ULTRASONIC THICKNESS GAUGE SA40+/SA40/SA40EZ is a miniaturized ultrasonic thickness gauge that can measure wall thickness and velocity. It is designed to measure the thickness of metallic and nonmetallic materials such as steel, aluminum, brass, silver, and more. The gauge is versatile and can be easily equipped with low and high-frequency probes. The SA40+ model uses a new technique called multiple echo (echo-to-echo) to measure wall thickness under paint, eliminating the need to remove the paint for measurement.

The SA40+ has two measuring modes: normal mode and multiple echo (MEC) mode. In normal mode, it functions as a regular ultrasonic thickness gauge, while in MEC mode, it can measure over coatings.

Measuring Principle

The ultrasonic wave is sent out by the probe and reaches the object to be measured through couplant. It reflects back from the object’s back surface, and the probe receives the reflected ultrasonic wave. By calculating the time it takes for the ultrasonic wave to reflect back, the gauge determines the thickness of the object being measured.

Technical Parameters

Model| Display| Backlight| Measuring Range| Resolution| Accuracy| Unit| Velocity Coupling Indicator| Calibration Memory| Low Battery Indicator| Working Environment| Power Off| Power Supply| Dimension (mm)| Net Weight (g)| Standard Probe| Optional Probes
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---
SA40+| 4 digits LCD| Yes| 0.70~300.0mm in steel with MT-5 probe| 0.7~300.0mm in steel with PT-5 probe (Normal mode)| 3.00~200.00mm in steel, thickness for coating| | | | | | | | | |
SA40| 4 digits LCD| Yes| 0.70~300.0mm in steel with MT-5 probe| 0.7~300.0mm in steel with PT-5 probe (Normal mode)| 3.00~200.00mm in steel, thickness for coating| | | | | | | | |
SA40EZ| 4 digits LCD| Yes| 0.70~300.0mm in steel with MT-5 probe| 0.7~300.0mm in steel with PT-5 probe (Normal mode)| 3.00~200.00mm in steel, thickness for coating| | | | | | | | |

Product Usage Instructions

To use the ULTRASONIC THICKNESS GAUGE SA40+/SA40/SA40EZ, follow these steps:

1. Prepare the gauge by ensuring it is powered on and the display is visible.
2. Select the desired measuring mode: normal mode or multiple echo (MEC) mode.
3. Choose the appropriate probe for your measurement. The standard probe is suitable for most applications, but optional probes may be available for specific materials or coatings.
4. Apply couplant to the object to be measured and ensure good contact between the probe and the surface.
5. Position the probe on the object and send out an ultrasonic wave by pressing the measurement button.
6. The gauge will receive the reflected ultrasonic wave and calculate the thickness of the object based on the time it takes for the wave to return.
7. The measurement result will be displayed on the LCD screen.
8. Repeat the measurement process as needed for different locations or objects.
9. After use, power off the gauge to preserve battery life.

Overview

• SA40+ / SA40 / SA40EZ are the miniaturized ultrasonic thickness gauges that can measure wall thickness and velocity. Our intelligent gauges are designed to measure the thickness of metallic and nonmetallic materials such as steel, aluminum, brass, silver and etc. They are quite versatile model which can be easily equipped with the low & high frequency probes.
• Using new technique of multiple echo(echo‐to‐echo), SA40+ can measure wall thickness under paint. For a normal ultrasonic thickness gauge, you must remove paint on work piece, but with new SA40+, you can take measurement directly over the paint of work piece and you can get real  thickness  value  of  work  piece.  SA40+  has  two  measuring  modes:  normal  mode  and  multiple echo(MEC) mode. By normal mode, SA40+ is a normal ultrasonic thickness gauge; by MEC mode, SA40+ can measure over coatings.

Measuring Principle

• The  ultrasonic  wave  sent  out  by  the  probe  reaches  the  object  to  be  measured  through couplant and reflects back from its back surface.
• The probe receives the ultrasonic wave reflected and gets the thickness of the object to be measured through calculating the time of ultrasonic reflecting back.

Technical Parameters

Measuring range

| 0.70~300.0mm in steel with MT‐5 probe (Normal mode) 3.00~200.00mm in steel, thickness

for coating: <1.2mm (MEC mode)

| 0.7~300.0mm in steel with PT‐5 probe
Resolution| [email protected]~99.99mm, [email protected]~300.0mm| 0.1mm
Accuracy| 0.70~9.99mm ±0.05mm / 10.00~99.99mm| 0.7~99.9mm
 | ±(0.5%+0.01)mm| ±(0.5%+0.1)mm
 | 100.0~300.0 ±(1%+0.1)mm| 100.0~300.0mm
 |  | ±(1%+1)mm
Unit| mm/inch| mm
Velocity| 1000~9999m/s
Coupling indicator| Yes
Calibration| Auto
Memory| 500 data| N/A
Low battery indicator| Yes
Working environment| 0~40oC, 20~90%RH
Power off| Auto
Power supply| AA battery x 2 / USB cable
Dimension (mm)| 145x68x28
Net weight (g)| 240
Standard probe| MT‐5| PT‐5
Optional probes| XT‐5 / GT‐5| XT‐5 / GT‐5 / CT2.5

Introduction to the Instrument

LCD display

• contact measuring
• to be confirmed
• low battery
• measuring mode
• calibration mode
• velocity setting
• clear the memory
• memory mode
• read the data
• measuring over coating
• velocity measurement
• velocity unit (Metric system)
• velocity unit (British system)
• thickness unit

Calibration

Calibration should be done after changing the battery or probe. Please use the 3mm block attached on the tester to calibrate.

1. Press circularly until “CAL” is displayed on LCD.
2. Take the probe to measure the block of 3.00mm attached on the panel of gauge. After 3.00mm displays, the calibration is finished and the gauge will come back into the mode of thickness measurement automatically.

Measuring

Turn on the tester

• In below 3 situations, the tester will come into measuring mode:
• It comes into measuring mode automatically when press .
• No matter what mode it is, once the probe contacts the object to be measured, the instrument will be back to the measuring mode automatically.
• In memory reading mode, press to go back to measuring mode. (only for SA40+/SA40)
• When measuring, the probe and the object to be measured shall be coupled well.

Take measurements in normal mode

1. Press to turn on the tester, “THK” means the tester is in measuring mode.
2. Coupled probe and the object to be measured well, indicates the measurement is valid. Measurement result will be displayed on LCD.

Take measurements in MEC mode (over coating, for SA40+)

1. Press to turn on the tester
2. Press circularly until “EcH” is displayed, then press to enter MEC mode (measuring over coating). In this mode, will be displayed on lower left corner of LCD. You can get thickness over coating in MEC mode. Press and hold until MEC is disappeared to exit MEC mode.
3. In measuring mode, press and hold until appeared / disappeared to switch MEC and normal mode.

Velocity

Changing velocity (for SA40+/SA40)

Velocity should be changed to measure different materials. If the velocity is known for the material, set the material velocity by this way.

1. Press menu key consecutively until “VEL” and current velocity value is displayed on LCD.
2. Press key or to change the value of velocity to the velocity required.
3. Press key to confirm and the gauge will enter measurement mode with new velocity.

Note: Press and hold or to change the number quickly.

Changing velocity (for SA40EZ)

Velocity should be changed to measure different materials. If the velocity is known for the material, set the material velocity by this way.

1. Press menu key consecutively until “VEL” and current velocity value is displayed on LCD.
2. The first digit flashes, press key or to change the value of the first digit, then press to move to the second digit, press or to change the value of the second digit as before, repeat this operation for four digits till the velocity is set properly.
3. After setting, press twice to enter measuring mode.

Measuring velocity (for SA40+/SA40)

If you do not know the velocity of the measured material but know the thickness of the material, you can measure the velocity. Please note in order to make the measured velocity more accurate, we suggest the thickness of the sample block is more than 10mm.

1. Press key consecutively until both THK and VEL are displayed on LCD. The last stored thickness value will also be displayed.
2. Press or to change the number to the thickness value of measured sample.
3. Put the probe on the sample and make sure there is a correct coupling. The value of the velocity that appears on the screen will correspond to the velocity of the measured sample. The gauge will automatically save this velocity and go into the mode of thickness measurement.

• Please note in order to make the measured velocity more accurate, we suggest the thickness of the sample block is more than 10mm.
• If the setting thickness value is much different from the actually thickness value, the screen will appear E01. And the gauge cannot get the new velocity.

Measuring velocity (for SA40EZ)

If you do not know the velocity of the measured material but know the thickness of the material, you can measure the velocity. Please note in order to make the measured velocity more accurate, we suggest the thickness of the sample block is more than 10mm.

1. Press key consecutively until both THK and VEL are displayed on LCD. The last stored thickness value will also be displayed.
2. The first digit flashes, press key or to change the value of the first digit, then press to move to the second digit, press or to change the value of the second digit as before, repeat this operation for four digits till the thickness value is set properly.
3. After setting, put the probe on the sample and make sure there is a correct coupling. The value of the velocity that appears on the screen will correspond to the velocity of the measured sample. The gauge will automatically save this velocity and go into the mode of thickness measurement.

• Please note in order to make the measured velocity more accurate, we suggest the thickness of the sample block is more than 10mm.
• If the setting thickness value is much different from the actually thickness value, the screen will appear E01. And the gauge cannot get the new velocity.

Memory (for SA40+ / SA40)

Data Store

In measuring mode, after taking a measurement of thickness, press , when flashes, the current measurement result will be stored in memory. If PPPP is displayed on LCD, it means the memory is full.

Data Read

• In measuring mode, press key to recall the data in memory. The last stored value will be displayed after its address number flashes. At the same time, is displayed on LCD which means this value is a recalled value. Press key continually, all stored values will be displayed one by one from the end to the head.
• Press to enter measuring mode.

Clear memory

• To clear the memory, press key consecutively until CLR is displayed on LCD, then press , when “?” is displayed, it wants to ask if you need to clear the memory. Press again to clear all memory. After “‐ ‐ ‐ ‐“ is displayed, press twice to go back to the measuring mode.

Thermal Material Measuring

• Materials thickness with maximum 400℃ surface temperature could be measured using high temperature probe GT‐5. Precautions: when measuring thermal materials:
• Apply high temperature couplant, measure immediately after the couplant melts, the probe contact shall be less than 10 seconds and the interval between two measurements shall be no less than 1 minute.
• Prevent the probe from being vibrated; otherwise the probe will be damaged.
• When the temperature of thermal material increases 100℃, the velocity decreases about 1%.
• Correction needs to be done to the measuring values.
• E.g.: we can define δ0 as the actual thickness of the material, δt as the display value in the instrument Then:
• When 125℃, δ 0 =δ t×0.99
• When 225℃, δ 0 =δ t×0.98
• When 325℃, δ 0 =δ t×0.97
• Also, when we know accurately the material temperature to be measured, we can also correct the velocity of the instrument.
• For example: under normal temperature (25℃), velocity of the material =5900 m/s,
• When 125℃, velocity ≈5840m/s
• When 225℃, velocity ≈5780m/s
• When 325℃, velocity ≈5720m/s
• Then, the displayed value is the actual value of the material.

Optional probes

400℃

| For SA40+/ SA40/SA40EZ
CT‐2.5| 2.5MHz| Dia. Æ12mm| For unfavorable attenuation

cast

| For SA40/SA40EZ

Reference Velocity of Various Materials

Material| Sound Velocity

(L wave, m/s)

| Acoustic impedance

(Lwave,106kg/m2s)

---|---|---
Al| 6260| 16.9
Zn| 4170| 29.6
Ag| 3600| 38.0
Au| 3240| 62.0
Su| 3230| 24.2
Fe| 5900| 46.0
Cu| 4700| 41.8
Brass| 4640| 39.6
SUS| 5790| 45.7
Acrylic resin| 2730| 3.2
Water(20°C)| 1480| 1.48
Oil| 1390| 1.28
Glycerin| 1920| 2.43
Water glass| 2350| 3.99

Notes

• Accurate readings cannot be guaranteed unless COUPLANT is applied between (a) probe and test block or (b) probe and the material to be measured, for accurate results, we recommend Vaseline is used as the couplant.
• The Probe sleeve can be removed if it is prohibiting any particular measurement in a difficult area.
• When measuring on pipes ensure that the “Separator” (i.e. the line on the face of the probe between the Transmitter & the Receiver) is at 90 deg. (Right Angles) to the length of the pipe. Avoid shock, heavy dust and damp. Remove the batteries from the gauge when not in use for long time.
• Dr.-Gottfri u 3 e e ll A -r M n 7 h/ c0 e · D-5a Gm eld-CTrreomne esst ik 022b6H Frechen
• Tel. +49 (0) 2234 9999960 · Fax. +49 (0) 2234 9999962
• Email:[email protected]
• www.salutron.de

Documents / Resources

| SADT SA40+ Ultrasonic Thickness Gauge [pdf] Instruction Manual
SA40, SA40, SA40EZ, SA40 Ultrasonic Thickness Gauge, Ultrasonic Thickness Gauge, Thickness Gauge, Gauge
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References

• Messgeräte für zerstörungsfreie Materialprüfung - SaluTron®

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