DeFelsko PosiTector UTG User manual
Full Guide v. 3.3
Ultrasonic Thickness Gage
Advanced model
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Table of Contents
Table of Contents
Introduction ......................................................... 1
Quick Start .......................................................... 1
Certification ......................................................... 3
Probes ................................................................. 3
How to Measure .................................................. 6
Surface Conditions .............................................. 7
Calibration, Verification and Adjustment ............. 8
Menu Operation .................................................. 9
Cal Settings Menu ............................................... 10
Zero ................................................................ 10
Thickness ....................................................... 11
Material .......................................................... 11
Velocity .......................................................... 12
2 Pt Adjust ..................................................... 12
Cal Lock ......................................................... 13
Cal Reset ....................................................... 13
Setup Menu ......................................................... 13
Reset .............................................................. 13
Min Scan ........................................................ 14
A Scan ............................................................ 15
B Scan ........................................................... 17
SE Mode ........................................................ 18
Smart CoupleTM .............................................. 19
Statistics Mode ............................................... 20
Memory Management .................................... 21
Annotate ......................................................... 24
Summaries ..................................................... 25
Screen Capture .............................................. 25
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Accessing Stored Measurement Data ................ 26
PosiSoft Desktop ........................................... 26
PosiSoft.net ................................................... 26
PosiTector App .............................................. 26
Connect Menu ..................................................... 26
WiFi......... ....................................................... 26
Access Point................................................... 27
USB.......... ...................................................... 28
USB Serial Streaming..................................... 29
Sync.net Now.................................................. 29
Bluetooth Smart................ ............................. 30
Bluetooth......................................................... 30
Updates .......................................................... 31
Application Notes ................................................ 32
Measuring on pipes ....................................... 32
Measuring on rough surfaces ........................ 32
Measuring on hot surfaces ............................ 33
Measuring laminated materials ...................... 33
Troubleshooting - eneral................................... 34
age fails to power down............................... 34
Probe measures when lifted from surface...... 34
age is coupled but not measuring................ 34
age readings double expected thickness 34
Measurement jumps when probe is lifted 34
Troubleshooting - Multiple Echo probes.............. 35
Power Supply / Battery Indicator ........................ 38
Technical Data .................................................... 38
Probe Details & Specifications........................ 38
Operating Temperature Range....................... 38
Size / Weight.................................................. 38
Returning For Service ......................................... 40
Warranty .............................................................. 40
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Introduction
1. Remove the protective rubber cap from the probe.
2. Power-up age by pressing the center navigation button.
3. Zero the probe (see pg. 10)
4. Select the correct velocity of sound (see pg. 12)
5. Measure the part (see pg. 6)
Quick Start
The PosiTector UTG is a hand-held Ultrasonic Thickness age that
uses the non-destructive ultrasonic pulse-echo principle to measure
the wall thickness of a wide variety of materials. It consists of a body
(Standard or Advanced) and interchangeable UTG probe.
The PosiTector UTG powers-up when the center navigation
button is pressed. To preserve battery life, the age powers
down after approximately 5 minutes of no activity. All settings are
retained.
1
PosiTector UTG: Included Accessories
Probe only
(UTG C, UTG CA, UTG CX, UTG CLF, UTG P or UTG M):
• Quick uide instructions
• Zero plate
• Protective rubber cap for probe
• 4 ounce (118 ml) bottle ultrasonic couplant
• Certificate of Calibration traceable to NIST
Gage (in addition to above Probe accessories):
• Protective rubber holster with belt clip
• USB cable
• Wrist strap
• Nylon carrying case with shoulder strap
• Protective lens shield
• 3 AAA alkaline batteries
Protective Cap
PosiTector UTG gages ship with a protective plastic cap over the
probe. Remove this cap prior to use. Replace it when the
instrument is not in use to protect the probe.
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2
Wrist Strap
DeFelsko recommends attaching and
wearing the supplied wrist strap.
1
2
Protective ens Shield
The LCD is covered with a thin plastic film for protection against
fingerprints and other marks during shipment. This film, while
usually removed before using the instrument, can be left in place
to protect against paint overspray or debris. Replacements can be
purchased.
PosiTector Gage Body
The PosiTector UTG CA
comes complete with a
standalone zero block
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3
Current Measurement
Currently
selected
material or
velocity of
material
Unit of Measurement
The Coupled Symbol appears when the probe
is ultrasonically connected with a surface.
inch
Steel
Battery
Icon
Measurement Mode
currently set to multiple-echo
(UTG M / UTG P probes only)
Typical Display
0.200
Certification
All PosiTector UTG probes include a Certificate of Calibration. For
organizations with re-certification requirements, instruments may
be returned at regular intervals for calibration.
DeFelsko recommends that customers establish calibration
intervals based upon their own experience and work environment.
Based on product knowledge, data and customer feedback, a one
year calibration interval from either the date of calibration, date of
purchase, or date of receipt is a typical starting point.
When powered-up the PosiTector automatically
determines what type of probe is attached and does a
self-check.
To disconnect a probe from a body, slide the plastic probe
connector horizontally (in the direction of the arrow) away
from the body. Reverse these steps to attach a new probe.
It is not necessary to power-down the age when
switching probes.
Additionally, the PosiTector gage body accepts a wide variety of
probe types including magnetic, eddy-current and ultrasonic
coating thickness, surface profile, environmental, hardness, salt
contamination and ultrasonic wall thickness probes.
Probes
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•PosiTector UTG CA / UTG C – dual element, single-echo
probe ideal for measuring severely corroded/eroded materials.
PosiTector UTG CA models feature a built-in probe, while
PosiTector UTG C models feature a probe mounted on a 1m
(3ft) cable.
•PosiTector UTG CX - same specifications as UTG C above,
but includes a braided stainless steel cable jacket and
reinforced strain reliefs for protection in demanding
environments.
•PosiTector UTG CLF – dual element, single-echo probe
designed for measuring thick and/or attenuative materials such
as cast iron.
•PosiTector UTG M – single element, multiple-echo probe
features Thru-Paint capability designed to quickly and
accurately measure the metal thickness of a painted structure
without having to remove the coating.
•PosiTector UTG P – single element probe with automatic
multiple-echo or single-echo mode depending on material type
and thickness, can be used for Thru-Paint applications. Ideal
for high-resolution measurements on thin plastics and metals.
For PosiTector UTG probe specifications, see
Technical Data (pg. 38)
PosiTector UTG probes transmit an ultrasonic pulse into the material
to be measured. This pulse travels through the material towards the
other side. When it encounters an interface such as air (back wall) or
another material, the pulse is reflected back to the probe. The time
required for the pulse to propagate through the material is measured
by the gage, represented as t1 and t2 below.
All PosiTector UTG probes determine thickness by measuring t1
(uncoated) or t2 (coated), dividing it by two and then multiplying by
the velocity of sound for that material (steel). [UTG M and UTG P
single-echo mode only] See Figure 1.
Ultrasonic Thickness Probes –
Theory of Operation
PosiTector UTG probes are available for a
variety of wall thickness applications:
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5
For uncoated materials t1relates directly to material thickness.
When a material is coated the propagation time is increased and
is shown above as t2.
Coatings such as paint have a slower velocity of sound than that
of metal. Thus the single-echo technique will produce a thickness
result greater than the actual combined coating+metal thickness.
>
Figure 1
Probe
Probe
t1
t1
t2
t2
Steel
Steel
Coating
The PosiTector UTG M and UTG P in multiple-echo mode
determine thickness by measuring the time between at least three
consecutive back wall echoes.
1
t2
t3
t
Figure 2
Probe
Probe
Steel
Coating
1
t2
t3
t
In the figure above, multiple-echo mode measures only the time
between echoes. Regardless of whether the steel is coated or not,
all times between echoes are the same. In multiple-echo mode the
gage determines thickness by measuring t1+t2+t3, dividing it by
six and then multiplying by the velocity of sound for that material.
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6
The resultant thickness calculation made by the instrument is
therefore an accurate measurement of the steel thickness only,
disregarding the coating thickness.
PosiTector UTG P (Precision) probes automatically switch
between multiple echo and single echo operation depending upon
the type and thickness of the material being measured.
The velocity of sound is expressed in inches per microsecond or
meters per second. It is different for all materials. For example,
sound travels through steel faster (~0.233 in/µs) than it travels
through plastic (~0.086 in/µs).
The PosiTector body accepts a wide
variety of probe types including
magnetic, eddy current and ultrasonic
coating thickness, surface profile,
environmental, hardness, salt
contamination, and ultrasonic wall
thickness probes
.
Additional PosiTector Probes:
PosiTector gage bodies accept all PosiTector 6000, 200, DPM,
IRT, SPG, RTR, SST, SHD, BHI and UTG probes
1. Remove rubber cap from probe.
Couplant (glycol gel - included) must be
applied to the surface to be tested to
eliminate air gaps between the wear face
and the surface. A single drop of couplant is
sufficient when taking a spot measurement.
How to Measure
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7
When the probe senses echoed ultrasound, a coupled symbol
will appear and thickness values will be displayed. While
the probe is coupled, the PosiTector UTG continually updates
the display. The age will emit a “tick” sound every time the
probe takes a measurement. The Reading Tick option can be
disabled in the Setup menu (see pg. 13).
3. When the probe is removed from the surface, the last
measurement will remain on the display.
Occasionally, excess couplant will remain on the probe when
the probe is lifted from the surface. This may cause the
PosiTector UTG to display a final measurement value
different from those observed when the probe was on the
surface. Discard this value and repeat the measurement.
2. Place the probe flat on the surface. Use moderate pressure to
press against the top of the probe with the thumb or index
finger when measuring with cabled probes.
When using the PosiTector UTG P, it is especially
important to avoid using excess couplant when taking a reading.
The PosiTector UTG P is designed for measuring thin materials
and will measure a thin layer of couplant left on the probe face
after a measurement.
NOTE:
Surface Conditions
Ultrasonic measurements are affected by the condition,
roughness and contour of the surface to be tested.
Measurement results may vary on coarse surfaces. Where
possible, it is recommended to seat the transducer on a smooth
flat surface that is parallel to the opposite side of the material.
On rough surfaces, the use of a generous amount of couplant
minimizes the surface effects and serves to protect the transducer
from wear, particularly when dragging the probe across a surface.
During scanning operations, the probe can become physically
decoupled, that is physically separated, from the material, either
due to the rough and/or scaly surface of the material or due to
user operation. Avoid this by using the Smart CoupleTM feature
(pg. 18).
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