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.
Copyright 2013 Flir Systems, Inc., All Rights Reserved
Printed in the United States of America
TKG250 Ultrasonic Thickness Gauge
3
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
5
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
7
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 32F (0C), 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
9
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
Indice
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