Extech Instruments TKG250 Manuale utente

USER GUIDE

Model TKG250

Ultrasonic Thickness Gauge

Extech Instruments

2 TKG250- EN V2.4 11/13

WARRANTY

FLIR Systems, Inc. warrants this Extech Instruments brand device to be free of

defects in parts and workmanship for two yearsfrom date of shipment (a six month limited

warranty applies to sensors and cables). If it should become necessary to return the

instrument for service during or beyond the warranty period, contact the Customer Service

Department for authorization. Visit the website www.extech.com for contact information. A

Return Authorization (RA) number must be issued before any product is returned. The

sender is responsible for shipping charges, freight, insurance and proper packaging to

prevent damage in transit. This warranty does not apply to defects resulting from action of

the user such as misuse, improper wiring, operation outside of specification, improper

maintenance or repair, or unauthorized modification. FLIR Systems, Inc. specifically

disclaims any implied warranties or merchantability or fitness for a specific purpose and will

not be liable for any direct, indirect, incidental or consequential damages. FLIR’s total

liability is limited to repair or replacement of the product. The warranty set forth above is

inclusive and no other warranty, whether written or oral, is expressed or implied.

The information in this document is subject to change without notice and describes only the

product defined in the introduction of this documentation. This document is intended for

the use of Extech Instruments customers only (a Flir Systems, Inc. brand) for the purposes

of the agreement under which the document is submitted, and no part of it may be

reproduced or transmitted in any form or means without the prior written permission. For

information address: Flir Commercial Systems, Inc.. 9 Townsend West, Nashua NH, 03063

U.S.A.

The information or statements given in this document concerning the suitability, capacity, or

performance of the mentioned hardware or software products cannot be considered binding

but shall be defined in the agreement made between Flir Systems and the customer.

However, Flir Systems has made all reasonable efforts to ensure that the instructions

contained in the document are adequate and free of material errors and omissions. Flir

Systems will, if necessary, explain issues which may not be covered by the document.

Other product names mentioned in this document may be trademarks of their respective

companies, and they are mentioned for identification purposes only.

Printed in the United States of America

TKG250 Ultrasonic Thickness Gauge

LIABILITY

Ultrasonic testing is a function of using the proper equipment (electronics, transducer,

cable and couplant combination) for the inspection and a qualified operator who knows

how to use this manual, the instruments and all calibration procedures. The improper use

of this equipment, along with the improper calibration can cause serious damage to

components, factories, facilities, personal injury and even death. ALL FLIR SYSTEMS

ULTRASONIC THICKNESS GAUGES ARE NOT INTRINSICALLY SAFE AND

SHOULD NOT BE USED IN ANY HAZARDOUS OR EXPLOSIVE AREAS.

It is understood that the operator of this equipment is a well-trained inspector qualified by

either their own company or another outside agency to issue Ultrasonic Level I, 40 hour

class room training in Ultrasonic Theory. Flir Systems and any of its employees or

representatives shall not be held responsible for improper use of this equipment for its

intended use. Proper training, a complete understanding of Ultrasonic wave propagation,

thorough reading of this manual, proper transducer selection, correct zeroing of the

transducer, correct sound velocity, proper test blocks, proper cable length, proper

couplant selection all play a factor in successful ultrasonic thickness gaging. Special care

should be taken when test pieces have rough or painted surfaces, particularly those

applications where the test piece is thin to begin with as doubling of the echoes is

possible even if the transducer is capable of measuring the desired thickness. As

transducers wear or heat up, results can be either too thin due to a lack of sensitivity as a

result of wear or too thick due to heating up of the transducer, referred to as “drift.”

Extech Instruments

4 TKG250- EN V2.4 11/13

Table of Contents

Table of Contents........................................................................................................... 4

1 Getting Started............................................................................................................ 6

About the TKG250 Wave............................................................................................. 6

Probe Zero..................................................................................................................... 7

Keypad Functions......................................................................................................... 7

Function Keys................................................................................................................ 8

Display Screen.............................................................................................................. 8

Using the Battery Pack............................................................................................... 10

Monitoring the Battery Charge from the Display Screen................................... 10

Replacing the Battery.............................................................................................. 10

2 Basic Gauge Operations......................................................................................... 11

Power on the Gauge................................................................................................... 11

Performing a Reset..................................................................................................... 12

Database Reset....................................................................................................... 12

Parameter Reset...................................................................................................... 13

Database/Parameter Reset ................................................................................... 14

Backlight....................................................................................................................... 14

About Screen............................................................................................................... 15

3 Calibrating the Gauge and Making Measurements ......................................... 16

Velocity Calibration Only............................................................................................ 16

Velocity and Zero Calibration.................................................................................... 17

Zero Calibration Only ................................................................................................. 17

Delay Line Calibration................................................................................................ 17

Automatic Zero............................................................................................................ 18

Measurement Mode with a Datalogger................................................................ 19

4 Adjusting parameters in A-Scan mode: ............................................................. 20

5 Using Setup Mode on the Gauge.......................................................................... 22

Using the Clock........................................................................................................... 24

Understanding an LOS Reading............................................................................... 26

Using the Hold Option................................................................................................ 26

TKG250 Ultrasonic Thickness Gauge

Using the Fast Option................................................................................................. 26

Using the Gain Option................................................................................................ 29

Using the Diff Option.................................................................................................. 31

Using the Alarm Option.............................................................................................. 31

Setting the Visual and Audible Alarm................................................................... 35

Setting the Vibra Alarm........................................................................................... 35

Using the Echo-to-Echo Option................................................................................ 36

6 Special Gauge Functions ....................................................................................... 39

Using the Save Option............................................................................................... 39

Using the Freeze Option............................................................................................ 40

7 Using the Datalogger Directory Mode................................................................. 42

Managing the Datalogger File System.................................................................... 45

Creating a new File..................................................................................................... 47

Selecting a Custom Linear File ............................................................................. 49

Selecting a Custom Grid File................................................................................. 49

Reviewing a File.......................................................................................................... 50

Reviewing a Linear File.......................................................................................... 51

Reviewing a Grid File.............................................................................................. 52

Renaming a File.......................................................................................................... 52

Clearing all readings within a File ............................................................................ 55

Copying a File.............................................................................................................. 56

Deleting a File.............................................................................................................. 58

Waveform Adjustments.............................................................................................. 65

Blanking........................................................................................................................ 69

8 Technical Specifications ........................................................................................ 72

Specifications for the TKG250.................................................................................. 72

9 Software Options...................................................................................................... 74

Echo-to-Echo........................................................... Fel! Bokmärket är inte definierat.

B-Scan.......................................................................................................................... 74

Saving a B-Scan to memory..................................................................................... 75

10 Technical Assistance ............................................................................................ 76

Extech Instruments

6 TKG250- EN V2.4 11/13

1 Getting Started

About the TKG250 Wave

The TKG250 is a portable, digital, handheld thickness gauge and is specifically

designed to measure the remaining wall thickness of primarily steel structures.

Vibralarm (vibrates gauge below/above minimum/maximum thickness value)

Illuminating keypad for easy to view go-no go thickness values (patent pending)

Automatic transducer replacement intelligence built in (patent pending)

Unique, programmable left-hand/right-hand operation (patent pending)

Up to 50 hour battery life with 2 AA batteries

Small, easy to hold, ergonomic, custom molded, durable case with rubber keypad

Automatic zero capability

Gain boost

Multiple dual and single element transducer options including high temperature

The TKG250 offers a simple user interface packaged in a custom molded high-density

plastic case with rubber keypad. This gauge offers reliable, accurate thickness readings

on mostly steel structures with access to only one side. The TKG250 offers live color

waveform (A-Scan).

The TKG250 provides a gain adjustment, vibrating alarm and illuminating keypad

conditions, and automated transducer replacement notification feature.

The TKG250 advanced features include:

Live Color Waveform with gain, range, rectify adjustments

50,000 (expandable to 100,000) reading (5,000 waveform) datalogger capacity

with complete setup tracking

Three pre-set files for linear, grid (row advance) and grid (column advance)

Echo-to-Echo

B-scan

Custom molded carrying pouch with belt clip and elastic strap

TKG250 Ultrasonic Thickness Gauge

Probe Zero

When turning on the TKG250, the gauge does an automatic zeroing of the transducer

thus eliminating the need for an on-block zero. It will also electronically zero the

transducer upon power up and at a particular time during normal operation. This feature

ensures the transducer is working in accordance with electronic zeroing procedures. This

feature is particularly important on high temperature materials and when the transducer

becomes worn.

Important Notice: Please make sure the transducer is not coupled to the test piece when

the gauge is first turned on and that there is no couplant on the end of the transducer. The

transducer should also be at room temperature, clean without any noticeable wear.

For a more accurate “span” of calibration, Flir Systems recommends a zero calibration

and sound velocity calibration as well.

Upon first turning on the gauge, you can match the transducer part number on the back of

the transducer to the screen, wipe couplant off face and press MENU OK. Here is what

the first screen will look like, see reset and backlight sections for additional details.

Keypad Functions

The figure below shows the full keypad. Refer to the following table that lists the

function of each key on the keypad.

Key

Function

Extech Instruments

8 TKG250- EN V2.4 11/13

Up arrow key

Down arrow key

Left arrow key

Right arrow key

On/Off symbol (under the F1 key)

OK key

F1 key

F2 key

F3 key

Function Keys

Function keys, or F keys, such as F1, F2, and F3 have various gauge functions and may

change depending on the display screen. View the bottom of the display screen for the

function that corresponds with the appropriate F key. For example, F1 may correspond

with the Save function, F2 with the Freeze function, or F3 with the Directory function

(Dir).

Display Screen

The gauge has a graphic style color TFT with 270x220 pixel density. Viewing the screen

is best from straight above or slightly below the surface rather than from side to side. If

external temperatures are below 32F (0C), the display may be slower to update

information.

At the top right corner of the display screen is the “available key mode”.

Color thickness

TKG250 Ultrasonic Thickness Gauge

Color Waveform in Echo-to-Echo, filename, id, minimum, large thickness value, Echo-to-Echo,

range, echoes, blanking, gain, rectification, battery life, save, freeze and directory.

RF in Zoom mode “Z”

The top part of the display screen shows the File name, ID number, AA, and 0001 for

grid column and row. The lower part of the display acts as an interactive tool that allows

you to decide how you want to proceed with the information that is displayed on the

screen. The middle part of the screen shows the thickness value, In, mm or usec, Echo-to-

Echo symbol, LOS for loss of signal, Freeze, Fast Min or Max, Alarm indicator,

Differential mode, Low, Med or High gain and percent remaining battery life.

F1 F2 F3

Extech Instruments

10 TKG250- EN V2.4 11/13

Using the Battery Pack

Monitoring the Battery Charge from the Display Screen

The TKG250 constantly displays the percent battery life on the bottom right hand corner

of the measurement display screen. When the gauge gets below 10 %, the indicator will

turn from green to red and a 5% it will flash.

Note: You should power down the TKG250 to ensure any saved data is stored internally.

Replacing the Battery

To replace the battery pack, unscrew the battery door on the bottom of the gauge and

slide out the two “AA” batteries. Replace with two new “AA” batteries paying attention

that both positive ends should be facing towards the top of the gauge.

F1 F2 F3

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