PeakTech 5225 Ultrasonic Thickness Meter Instruction Manual

PeakTech 5225 Ultrasonic Thickness Meter

Safety Precautions

This product complies with the requirements of the following directives of the European Union for CE conformity: 2014/30/EU (electromagnetic compatibility), 2011/65/EU (RoHS). To ensure safe operation of the equipment and eliminate the danger of serious injury due to short-circuits (arcing), the following safety precautions must be observed. Damages resulting from failure to observe these safety precautions are exempt from any legal claims whatever.
Do not use this instrument for high-energy industrial installation measurement.

• Do not place the equipment on damp or wet surfaces.
• Do not place water filled containers on the equipment (danger of short-circuit in case of knock over of the container).
• Check test leads and probes for faulty insulation or bare wires before connection to the equipment.
• Comply with the warning labels and other info on the equipment.
• Do not subject the equipment to direct sunlight or extreme temperatures, humidity or dampness.
• Do not subject the equipment to shocks or strong vibrations.
• Do not operate the equipment near strong magnetic fields (motors, transformers etc.).
• Keep hot soldering irons or guns away from the equipment.
• Allow the equipment to stabilize at room temperature before taking up measurement (important for exact measurements).
• Periodically wipe the cabinet with a damp cloth and mid detergent. Do not use abrasives or solvents.
• The device is suitable for indoor use only
• Do not store the meter in a place of explosive, inflammable substances.
• Do not modify the equipment in any way
• Do not place the equipment face-down on any table or work bench to prevent damaging the controls at the front.
• Opening the equipment and service – and repair work must only be performed by qualified service personnel
• Metal parts are electrical conductors, so please be careful and never attach the metal sensors to a voltage carrying object.
• Don’t use the transducer on aggressive or corrosive materials. Clean the transducer from rust, dirt or any oils it may had contact with to avoid faster aging of the transducer-material.
• Because the wear surface of the transducer is made of a material that is easily scratched, you should move the sensor gently when measuring a rough material.
• The temperature of the measurement object should not exceed 60 ° C, otherwise the sensor may be damaged. Adhering oil, dust on the wear surface accelerates the aging of the sensor.
• Clean the sensor after use.

Measuring instruments don’t belong to children hands-
Cleaning the cabinet
Clean only with a damp, soft cloth and a commercially available mild household cleanser. Ensure that no water gets inside the equipment to prevent possible shorts and damage to the equipment.

 Introduction

This newly-developed material thickness meter is microprocessor controlled and operates with the ultrasonic principle. Thus, the device can measure the material thicknesses of the most sound waves conductive materials on the basis of the speed of sound, such as e.g. Metal, glass, plastic, ceramic and more. For highest accuracy, the device offers a very high resolution of 0.1mm and an auto-calibration function with a built in housing 4mm metal plate. The instrument is equipped with two sensors for different material thicknesses which permit measurements of 1mm to 300mm at 5MHz frequency sound. For best protection, the wide range of accessories is stored in an aluminum carrying case. Thus, the device is ideal for everyday use in the evaluation of material thicknesses in shipbuilding, the metal and pipeline construction or production of goods.

•  Multiline LCD display with backlight
•   Ultrasonic measuring technique for material thickness
• Integrated Calibration Function
•  Suitable for material thicknesses up to 300mm
• Highest measuring accuracy and resolution
•  Twelve material presets
•  Contact Display for Sensor Pad
• Data storage for twelve readings
•  Auto Power Off function

Technical Data

• Measurement range:                 1.00 to 300.0mm (Steel)

• Accuracy:                               ±(1%H+0.1mm) ; (H = meas. thickness)

• Working frequency:               5MHz

• Resolution:                            0.01mm (1.00 bis 99.99mm) / 0.1mm (100 bis 300mm)

• Min. Limit for tubes. (Steel):  Ø152.0mm (Ø 6mm transducer) Ø203.0mm (Ø 10mm transducer)

• Sound Velocity:                     1000 to 9999 m/s
  Thickness ≤20mm, accuracy: ±1.25%/Hx100%
  Thickness ≥20mm,  accuracy: ±5%

• Operating environment:         0 to 40°C / <90% R.H.

• Meas. Object Temp.:             <60°C

• Operating voltage:                 1.5V AAA * 3 pcs.

• Battery consumption:            ≤35mA (with backlight)

• Size:                                       72x29x146mm

• Weight:                                  223g

Operation

Controls and description of front-panel

Front:

1. LCD display
2. Keypad
3. pattern block
4. Battery compartment (back)
5. Auto Switch
6. Transmitter and receiver socket
7. Transmitter and receiver socket

Keypad

alarming value adjustment
| Key for sound speed selection, adjustment, thickness value adjustment and alarm value adjustment

 Display Symbols

1. Coupling indicator
2. Transducer Frequency
3. Back light icon
4. Battery power
5. Thickness unit
6. Sound velocity indicator
7. Thickness alarm
8. Sound velocity unit
9. Sound velocity reading
10. Velocity stored unit
11. Thickness reading

Operating method

Thickness measuring
Paste the coupling agent on the measured place to couple the sensor with the measured material. The thickness value appears on LCD with the coupling icon “ ”(the coupling fails if this icon flashes or disappears) Well coupled, and in process of thickness measuring. Thickness measuring completes, remove the sensor away.
Remarks:

• Select the corresponding sound speed according to the measured material and make direct measuring. Because the actual speed differs with the speed preset, this measuring method is not for accurate measurement.
• For accurate measurement, select a standard block of the same material with that of the measured object and measure its sound speed (refer to the part of Sound Speed Measuring for details).

Sound speed adjustment (VEL)
Press “ VEL/DEL” key and the sound speed icon flashes, then press the Up key or Down key to adjust the speed, press the“VEL/DEL”key the “VEL” icon flashes, then press the Up key or Down key to adjust the speed preset.. Adjusting the sound speed within the unit Adjusting the unit of sound speed.
Calibration:
Long press on the “CAL/CLR” key until 4.00 appears with “CAL” flashing at the bottom. Take 4.00 standard calibrating piece at the 5900m/s until the “CAL” disappears. Calibration window
Sound speed measuring:

How to determine the sound speed of a certain material with piece of given depth: Measure the depth of the material with caliber or micrometer. Select a preset speed close with the measured and couple the sensor with the block with given thickness until a value is given, remove the sensor and adjust the value with Up or Down key to make it equaling with the actual thickness value. Press the “CAL /CLR” key to display the measured speed and save the value to the current unit automatically. The thickness must be sufficient for measuring that is at least 25.0mm. Measuring the thickness Measuring the speed
Restoring the default speed value:
Long press on “CAL/CLR” key until “CAL” followed with “CLR” interface, release the key the speed jump to 5900 m/s automatically. Restoring default speed
Change mode
Press MODE/STORE” key to switch among normal mode, high gain mode and low gain mode. The normal mode has no icon display while high gain and low gain have their icons. The normal mode is for measuring the steel material while the low gain mode for aluminum and copper material and high gain mode acrylic material such as. Normal mode High Mode Low Mode
Saving Data
The thickness displayed while measuring, press “CAL/CLR” key can save the thickness value with the memory unit flashing once indicating the current thickness is saved. “FUL” on the LCD indicates the memory is full. Saving the current value  Memory is full
Reviewing saved data
Long press on the MODE/STORE” key to enter into reviewing window, it displays “NON” if there is no datum saved. Use Up key or Down key to review the data. Short press on the VEL /DEL” key is to delete the current data. Long press on VEL /DEL” key until “CLr” appears, that may clear all data saved. Short press on “CAL/CLR” key to leave reviewing window. Review the Clear the data saved Delete the data in current unit  Clear the data saved
High/low alarm value setting
Long press on MODE/STORE” key and key at the same time until “LO” appears at the bottom and a value appears at the top of the LCD indicating entry to the low alarm value setting, then press Up key or Down key to adjust the value; short press on MODE/STORE” key to switch to high alarm value setting with “HI” appears at the bottom of the LCD, then press Up key or Down key to adjust the value. After adjustment, press “CAL/CLR” key to enter into measuring window. High alarm limit is 305mm and low alarm limit 0.7 mm if the measuring is less than the low limit the buzzer beeps once while larger than high limit it beeps 3 times. Low alarm limit setting  High alarm limit setting
Backlight
When turning on, short press on the key to activate or deactivate the backlight.
Sensor selection
Long press on key and press Up key to switch between sensor2.5MHz and sensor 5MHz. Under 5MHZ sensor press “MODE/STORE”key to swtich between d6 and d10. Release the  key after selection is done.
Unit selection
Long press on key , and press Down key to switch between metric system and British system. Release the key after selection is done.
Window after turning on
Full display appears after turning on with buzzer beep for 1 second and then enter into measuring mode.
Turning off
While turning on, long press on  key to deactivate the device. It turns off automatically if there is no further operation within 3 minutes.
Low battery indication
The icon indicating low battery, and the battery should be replaced immediately.

Please note

1.  Remove dust, dirt, rust or other contaminants which may adversely affect the measurement result before measuring.
2. A too rough surface could disturb a measurement, so that an error is displayed. Grind / polish the surface at the point being measured to make a measurement. If no measurement is possible, this may be due to the surface properties, the material or a weak point in the material, which is not visible from the outside.
3.  For measurements of tubes and pipes you must pay attention to the use of the right measuring transducer. For pipes with larger diameter use the 10mm sensor and for tubes with a smaller diameter, use  the 6mm sensor. If the pipe is bent very strong, so that the sensor can’t be positioned properly, use the  smaller sensor, since this also has a smaller contact area. For measurement turn the sensor if necessary by 90° and repeat the measurement. The smaller measurement result is the correct measurement value at this point.
4.  To get a satisfying ultrasonic response, the surface must have its one measuring side parallel with another, otherwise will obtain wrong result. Search -if possible- a place of upper and lower sides as parallel as possible and repeat the measurement.
5.  The speed of sound in materials may change due to the temperature of the workpiece. If necessary, perform a control measurement on a second workpiece or adjust the speed of sound as described in Section 5.3.
6. Sound-absorbing materials such as fibrous, coarse-pored or gritty materials can falsify the measurement result. In this case, the meter is not suitable for the intended application.
7. For calibrations this meter has a sample block with 4mm thickness. For increased precision (as in repetitive applications) is however recommended to use a sample block from the respective measured material, as described in Section 5.3.
8.  The transducer may wear out due to misuse, normal wear or sharp edged surfaces. Are the readings illogical or there are readings also displayed permanently without coupling to a workpiece, the sensor may be worn and should not be used anymore.
9. Use to set the  keys to zero the measured value to 0.000, when the sensor is not resting on a workpiece. This increases the measurement accuracy. Run also regular calibrations of the device with the integrated sample block.
10.   In composite material, the ultrasound can’t evenly diffuse. Therefore, the measurement results in composite material consisting of layers of different materials are inaccurate or completely false, because the measuring principle used the ultrasound reflection is not applicable here. A heavily oxidized surface can already act as a second material layer in this case, since the speed of sound in the oxidized material can spread differently than the non-oxidized core of the workpiece.
11.  Use the correct ultrasound coupling gel. The enclosed gel can be applied for all materials. It  may be useful for rough surfaces or aluminum to use a gel with a higher viscosity such as to use glycerine as commercially available items, for increased precision.

Selection of Transducer

Transducer| Characteristics| Range| Recommended Operating Temp.
---|---|---|---
Ø10mm| General-purpose| 1.00mm       …
300.0mm
(Steel)| -10 … +60 °C
Ø6mm| Thin work piece| 1.00mm       …
50.0mm (Steel)| -10 … +60 °C

Precautions for accuracy

1. For very thin material
   Any ultrasonic thickness gauge, when the thickness of the material to be measured is less than the minimum limit the fault reading will occurs. Using sample block compare method to get a minimum limit of this material.

2. For stained, rusting surface
   The stained/rusting surface on the contra side will occurs the rule less wrong readings. Sometimes a small stained spot is hard to find out. Take care for measurement while measuring the known rusting spot/suspicious area. Or using sound insulation celotex board to locate the spot in different testing angles.

3. Identify different velocity with vary material
   A fault reading would obtains, when measuring the hardware with the velocity calibrated by prior material. So a correct velocity should be adopted. The fault reading may also result form the difference between the actual velocity with the calibrated value.

4. Abrasion of the transducer
   Because the transducer is made of propylene, long period use will cause the surface of transducer became more rough which will decline the sensitivity lead to the wrong reading. Please polish the surface with sand paper or whetstone to assure the smoothness and parallel. If the reading still unsteady, the transducer should be replaced with new one.

5. ZERO function
   ZERO(calibration) is used to calibrate the unit with the standard block on the panel, do press this key for calibration with other materials or will the wrong measuring will take place.

6. Multilayer / composite material
   It is impossible to read out the thickness of the uncoupled multilayer for the ultrasonic wave can not go through the uncoupled space. Furthermore, the sonic wave cannot travel in the composite material at an even speed, so ultrasonic reflect principle cannot be applied to measure the multilayer /composite material.

7. Influence from the oxidized surface
   For some metals, such as aluminum a layer of oxide being generated on their surface. The oxidized layer combined with the substrate tightly, but the sonic wave travel within 2 different material which will lead to error reading, the more oxidized layer the reading will be more tolerant.
   Please calibrated the unit with the sample block that pick up along the hardware to be measured, and obtain the thick of sample block by using micrometer.

8. Abnormal reading
   A seasoned operator should be capable to distinguish the abnormal reading, practically result from rusting, erosive recess surface / incorrect calibrate sample block/ the inner flaw of material.

9. Choose and using coupling agent
   Coupling agent serves the high frequency ultrasonic wave transmitting between the transducer to the hardware. Choose incorrect agent or wrong operation can cause error or poor coupling which lead to failure of measuring. The coupling agent should be used in proper way, typically, a single droplet of agent is sufficient.

It is important to use proper coupling agent, low viscosity agent(the provided agent / machining oil) is suitable for smooth surface. For rough / veritcal / aluminum surface, high viscosity agent like glycerin and lubrication grease is applicable.

 Table of sound velocity

Diffusion of ultrasound in materials

 Accessories

Statutory Notification about the Battery Regulations

The delivery of many devices includes batteries, which for example serve to operate the remote control. There also could be batteries or accumulators built into the device itself. In connection with the sale of these batteries or accumulators, we are obliged under the Battery Regulations to notify our customers of the following: Please dispose of old batteries at a council collection point or return them to a local shop at no cost. The disposal in domestic refuse is strictly forbidden according to the Battery Regulations. You can return used batteries obtained from us at no charge at the address on the last side in this manual or by posting with sufficient stamps. Batteries, which contain harmful substances, are marked with the symbol of a crossed-out waste bin, similar to the illustration shown left. Under the waste bin symbol is the chemical symbol for the harmful substance, e.g. „Cd“ for cadmium, „Pb“ stands for lead and „Hg“ for mercury. You can obtain further information about the Battery Regulations from the Bundesministerium für Umwelt, Naturschutz und Reaktorsicherheit (Federal Ministry of Environment, Nature Conservation and Reactor Safety). All rights, also for translation, reprinting and copy of this manual or parts are reserved. Reproduction of all kinds (photocopy, microfilm or other) only by written permission of the publisher. This manual considers the latest technical knowing. Technical changings which are in the interest of progress reserved. We herewith confirm, that the units are calibrated by the factory according to the specifications as per the technical specifications.
We recommend to calibrate the unit again, after one year.
© PeakTech®  08/2021 Ehr.
PeakTech Prüf- und Messtechnik GmbH
– Gerstenstieg 4 – DE-22926 Ahrensburg / Germany
+49-(0) 4102-97398 80
+49-(0) 4102-97398 99
info@peaktech.de
www.peaktech.de
Coupling indicator Transducer Frequاency Back light icon
Battery power Thickness unit
Sound velocity indicator Thickness alarm Sound velocity unit Sound velocity reading Velocity stored unit Thickness reading

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