Cygnus 4
Multiple Echo Ultrasonic Thickness Gauge
Operating Manual
Covers Gauge Model : M5-C4
Doc No. M5-CYG4-M-01_Iss6.doc
18 October 2016
Cygnus 4 Operating Manual
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QUALITY POLICY STATEMENT
Cygnus Instruments’ mission is to be a premier supplier of niche test and
measurement instruments. To achieve this we will:
Customers
• Be dedicated to customer satisfaction by listening to direct and
indirect feedback regarding our performance and product
requirements in general.
• Design state-of-the-art products that are robust, reliable, simple-touse and compliant with applicable industry and regulatory
requirements.
• Provide products and services that meet or exceed customer
expectations in terms of performance, reliability and safety.
Internal Systems
• Operate effective and safe working practices that comply with ISO
9001:2008 and EN I SO/IEC 80079-34 and other applicable regulatory
and statutory requirements.
• Provide adequate resources to ensure product and service quality is
maintained.
• Set, communicate and measure performance objectives and targets
to promote continual improvement.
• Ensure employees are competent and involved in improvement and
customer satisfaction matters.
Suppliers
• Use suppliers and subcontractors who share our passion for customer
satisfaction and who consistently perform reliably.
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Contents
1. Important Notice .............................................................. 6
2. Introduction ...................................................................... 7
Cygnus 4 Thickness Gauge ......................................................7
Cygnus Instruments ...............................................................8
Regional Offices ....................................................................8
Gauge Kit Contents ................................................................. 9
3. Gauge Preparation .......................................................... 10
Fitting the Batteries ............................................................. 10
Connecting the Probe ........................................................... 11
Fitting the Neck Strap .......................................................... 11
4. Selecting the Right Probe ................................................ 13
Measuring Meta ls ................................................................. 13
Measurement Modes Explai ned and Compared ......................... 14
Multiple Echo Mode (Mode 3) .............................................. 14
Measuring Non-Steels .......................................................... 14
Measuring Non-Metals .......................................................... 14
Single Element Probes and Protective Membranes ..................... 15
Summary of Cygnus Probes .................................................. 18
Single Element probes ....................................................... 18
The ‘Probe Type’ Code ....................................................... 19
5. Gauge Operation ............................................................. 20
Gauge Controls ................................................................... 20
Turning the Gauge On .......................................................... 21
Turning the Gauge Off .......................................................... 21
Automatic Power Off .......................................................... 21
Status Information ............................................................... 22
Taking Thickness Measurements ............................................ 22
Taking the Thickness Measurement...................................... 23
Echo Indicators in Multiple Echo Mode .................................. 23
Display Hold Function ........................................................... 24
Battery Life ......................................................................... 25
Battery Level .................................................................... 25
Low Battery Indication .......................................................... 26
6. Calibration ...................................................................... 27
Why should I Calibrate my Thickness Gauge? ........................... 27
Calibration Options .............................................................. 28
Calibrating to a known thickness (Single or 1 Point) .................. 28
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Setting the Velocity of Sound ................................................ 30
7. Gauge Setup ................................................................... 32
Menu Operation ................................................................... 32
Settings are Saved with the Probe Type .................................. 33
Changing Numeric Values using the Navigation Keys ................. 34
Selecting the Probe Type ...................................................... 35
Automatic Probe Detection ................................................. 36
Measurement Un its .............................................................. 37
Resolution Setting ............................................................... 37
Limit Functions .................................................................... 38
Deep Coat Function .............................................................. 41
8. Setup Menu ..................................................................... 44
Vibrate Feature ................................................................... 44
Brightness Setting ............................................................... 44
Power Off Setting ................................................................ 45
Set Time and Set Date ......................................................... 45
9. General Points On Thickness Gauging ............................. 47
10. Troubleshooting ........................................................... 48
The Gauge will not Switch On ................................................ 48
Difficulty obtaining a Reading ................................................ 48
If Readings are Erratic or Unstable ......................................... 48
Tips for Optimising Battery Life .............................................. 48
11. Updating your Gauge ................................................... 50
Update Software .................................................................. 50
Gauge Firmware Files ........................................................... 50
12. Care and Servicing ....................................................... 51
Cleaning the Gauge .............................................................. 51
Batteries ............................................................................ 51
Environmental ..................................................................... 51
Repairs .............................................................................. 51
Returning the Gauge for Servicing .......................................... 52
13. Information ................................................................. 53
Technical Specifications ........................................................ 53
Table of Sound Velocities ...................................................... 56
Reading Conversions ......................................................... 57
14. EU Declaration of Conformity ....................................... 58
15. Recycling and Disposal (EC Countries)......................... 59
16. Warranty Information .................................................. 60
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17. Index ........................................................................... 61
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1. Important Notice
The following important information must be read and
understood by all users of Cygnus ultrasonic thickness
gauges.
The correct use of Cygnus ultrasonic thickness gauges requires
identification of the correct equipment for the specific application
coupled with an appropriately trained and qualified operator or
technician. The incorrect use of this equipment, along with its
incorrect calibration, can result in serious financial loss due to
damage to components, facilit ies, personal injury and even death.
Neither Cygnus Instruments nor any of its employees or
representatives can be held responsible for improper use of this
equipment. Proper training, a complete understanding of ultrasonic
wave propagation, thorough read ing of this manual, proper
transducer selection, correct zeroin g of the transducer, correct
sound velocity, correct use of the appropriate test blocks, proper
cable length and proper couplant selection all play a factor in
successful ultrasonic thickness gaugin g. Of critical importance is
the process of complete and accurate calibration of the
instrument.
This manual will provide instructions in the set up and operation of
the thickness gauge. Additional f actors that can affect the use of
ultrasonic equipment are beyond th e scope of this manual and to
that end it is understood that the operat or of this equipment is a
well-trained inspector qualified by either their own organisation or
another outside agency to the appropriate level of both theory and
practical application of ultrasonics .
Therefore Cygnus Instruments re commends that users of its
ultrasonic thickness gauges should be formally qualified to a
minimum of UT “Level 1” (ASNT or PCN) which will provide
approximately 40 hours of tra in in g.
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2. Introduction
Cygnus 4 Thickness Gauge
The Cygnus 4 Ultrasonic Thickness Gauge is a rugged,
handheld, battery-powered instr ument designed for high-reliability
multiple echo thickness measurements in harsh environments
using ultrasound.
The gauge can be used with a choice of Ultrasonic Probes, selected
to suit the material and thickness range to be measured.
The gauge measures material thickness using the Multiple Echo
technique giving quick, reliable measurements through surface
coatings which are ignored.
Measurements can be displayed in either Metric (mm) or in
Imperial (inch) units. The gauge has an side mounted sunlight
readable LCD graphic display which can be easily read in most
light situations.
The gauge can easily be calibrated to a known thickness or to a
known Velocity of Sound.
The gauge is able to operate accurately over a wide range of
ambient temperatures and is envi ron mentally sealed to IP67 for
use in wet conditions.
The gauge is a solid-state electronic instrument which, under
normal operating conditions, will give many years of active
service.
Although designed for ease of operation the first time user
should carefully read this manual to familiarise themselves
with the features of the Gauge.
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Cygnus Instruments
Cygnus Instruments Limited, founded in 1983,
were pioneers in the development of the Digital
Ultrasonic Multiple-Echo Technique used for
measurement through coatings. This has long
been the standard required to ensure t hat
accurate measurements are taken without the
need to first zero the gauge or remove any
coatings.
Our philosophy is to work closely with each of our customers to
provide a range of products specif ically for each application.
Cygnus Ultrasonic Thickness Gaug es are designed to be simple to
use and to withstand the harsh env iron ments that they are
intended for. We have built up an enviable reputation with our
customers in over 45 countries around the world.
Regional Offices
CYGNUS Instruments Ltd.
Cygnus House Dorchester
DT1 1PW England
Tel: +44 (0) 1305 265533
Fax: +44 (0) 1305 269960
www.cygnus-instruments.com
sales@cygnus-instruments.com
CYGNUS Instruments Inc.
PO Box 6417 Annapolis
MD 21401 USA
Tel: +1 410 267 9771
Fax: +1 410 268 2013
www.cygnusinstruments.com
sales@cygnusinstruments.com
CYGNUS Instruments Middle
East
P.O.Box 127267
Jebel Ali Free Zone (JAFZA)
Dubai UAE
Tel. +971 50 3459305
CYGNUS Singapore (S) Pte.
Ltd.
63 Jalan Pemimpin #05-01,
Pemimpin Industrial Building.
577219 Singapore.
Tel : +65 6252 5909
Fax : +65 6251 1318
www.cygnus-instruments.sg
sales@cygnus-instruments.sg
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Gauge Kit Contents
1. Cygnus 4 Gauge
2. Operating Manual (in side pouch)
3. Neck Strap (in side pouch)
4. Ultrasonic Probe
5. Moulded Probe Cable (in side pouch)
6. Accessory Pouch, containing;
3 x AA Batteries
Blue Couplant Gel.
15mm (or ½”) Steel Test Block
Spare Membranes
Membrane Key
Membrane Couplant
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3. Gauge Preparation
The gauge is supplied ready to use out of the box. Just insert the
batteries, connect the probe to the gauge, turn on the power and
you are ready to take thickness measurements.
Fitting the Batteries
The gauge requires 3 x AA/LR6/UM3 Batteries. Cygnus supplies
and recommends Duracell Alkaline batteries. The batteries are
located behind a cover on the rear of gauge. The hand strap can
be separated by a push-button buckle to gain access to the battery
cover. The battery cover is removed by pressing in with your
thumb the at the base to release the clip.
Press the bottom of the
battery cover to release
the retaining clip and lift
up the battery cover.
The batteries are located
underneath.
The gauge is protected
against electrical damage
from incorrect battery
insertion.
The battery compartment
itself is sealed to contain
any battery fluids that
may leak out.
The gauge can be fitted with NiCad or NiMH rechargeable
batteries but this may alter the specified operating time.
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To avoid damage from leaking batteries always remove the
batteries if the gauge will be unused for any length of time.
If the batteries run flat they may leak acid into the battery
compartment and damage the electrical contacts. This would
not be covered by the warranty.
Connecting the Probe
The Cygnus probe lead uses a custom made cable that offers
superior flexibility and resistance to oil s and ultraviolet light. The
cable will not stiffen after exposure to ultraviolet light.
The connector uses original Lemo connect ors for reliability.
Depending on the type of probe supplied the probe end will have
either a BNC or single Lemo 00 connector.
To release the connector
simply pull back on the
connector body. DO NOT
pull the cable.
Fitting the Neck Strap
The gauge is supplied with an adjustable Neck Strap. The ends of
the neck strap clip onto two wire loops fitted to the gauge. These
wire loops are made from coated stainless steel.
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Wire loop fitted to the
gauge body.
Simply pass the loop
through the hole in the
gauge and back over the
other end.
The neck strap can then
be clipped on to the loops.
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4. Selecting the Right Probe
The performance of any thickness gauge, and its ability to get a
reliable measurement depends on selecting the right ultrasonic
probe for the application and conditions. Cygnus gauges are
therefore offered with a selection of probes suitable for most
thickness gauging applications.
The following section helps you select the right probe for the
application.
The gauge must be set for the probe connected to it.
The probe type is displayed at the top of the measurement screen
in the status area.
Probe Type set to S2C.
Measuring Metals
Material Coating Corrosion Thickness
Recommended..
Probe
Measurement Mode
Steels
Any
Non to
Moderate
1 mm+
S5A
Multiple Echo
Steels
Any
Non to
Moderate
2 mm+
S3C
Multiple Echo
Steels
Any
Non to
Moderate
3 mm+
S2C
Multiple Echo
Steels
Any
Non to
Moderate
3 mm+
(0.12”+)
S2D
Multiple Echo
The S2C probe is suitable for most applications.
When measuring in Multiple Echo mode the coating will be
ignored and just the metal thickness measured.
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Measurement Modes Explained and Compared
Multiple Echo Mode (Mode 3)
Multiple Echo measurement mode is by far the most reliable and
easy method for thickness measurements, because it works by
looking for three matched echoes it can verify the thickness
measurement is valid. This method has been used in all Cygnus
gauges since the late 1970s.
Multiple echo mode will ignore surface coatings, there is no need
to remove the paint to take a measurement.
Also because it uses a single element (or single crystal) probe
there are no errors due to the V-pat h of the ultrasound beam
found in all twin element probes. This makes it simple to calibrate
– two point calibrations are not required.
However because it requires three echoes to take a measurement,
in heavily corroded steels there is often an insufficient number of
echoes so no measurement is possible.
Measuring Non-Steels
The gauge will measure the following non-steels;
• Aluminium alloys
• Copper and Brass alloys
• Titanium
Use the same rules as steels when selecting a suitable probe. The
gauge will ideally be re-calibrated to suit the metal being
measured, or the standard velocity of sound for that material
would be entered into the gauge.
Measuring Non-Metals
The gauge is not suitable for measuring non-metals. Typically
these materials cannot be measured with this gauge model;
• Plastics
• Concrete
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• Wood
• Thermal insu la tion mat erials
• Foams
• Composites
Single Element Probes and Protective Memb r an es
All Cygnus single element probes ha ve a soft face and are
therefore fitted with a Polyurethane Membrane which provides
better contact on rough surfaces and protects the probe face fro m
wear, prolonging the life of the probe.
Check the membrane regularly as it is important the
membrane is changed as soon as i t sh ows any signs of wear.
Single Element Probe Membrane Parts.
Probe Body
Locking Ring
Polyurethane Membrane
Knurled Ring
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Single Element Probe Membrane Locking Key
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Changing the Protective Membrane on Single element Probes
1.
Unscrew the Knurled Ring from the
end of the Probe.
2.
Use the Membrane Key to unscrew
the Locking Ring from inside the
Knurled Ring. The old membrane
can then be removed and
discarded.
3.
Place a new membran e into th e en d
of the Knurled Ring ensuring it
locates in the groove.
4.
Screw the Locking Ring back inside
the Knurled Ring and tighten with
the Membrane Key .
5.
Place a few drops of Membrane
Couplant on to the probe face.
6.
Screw the Knurled Ring back onto
the probe. Use your thumb to
squeeze the couplant from under
the membrane as you tighten the
Knurled Ring down.
7.
You should see the membrane has
a very thin film of couplant between
itself and the probe face with no air
bubbles.
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Measuring Higher Temperatures
The polyurethane membranes fitted to t he single element probes
are suitable for measuring surface temperatures up to 70°C
(160°F). For measuring higher tempe ratures Teflon membranes
are available and suitable for surface temperatures up to 150°C
(300°F) with intermittent contact. Contact Cygnus instruments to
order Teflon membranes.
When measuring high temperatures limit the time the probe is in
contact with the hot surface to less th an 4 seconds and ensure the
probe has sufficient time between measu rements to cool down.
Summary of Cygnus Probes
Single Element probes
Probe
Type
Size Frequency
Range in
Steel
Typical Uses
S2C
13mm
2.25 MHz
3 to 250 mm
General purpose probe suitable
for most applications that can
use Multiple Echo
measurement.
Coated metals
S2D
19mm
0.75”
2.25 MHz
3 to 250 mm
0.12 to 10”
As S2C but has longer focal
point (33 mm) and narrower
beam so may perform better
on thicker materials
S3C
13mm
3.5 MHz
2 to 150 mm
Coated metals
S5C
13mm
5.0 MHz
1 to 50 mm
Coated metals
S5A
6mm
5.0 MHz
1 to 50 mm
Small diameter tubes
Thin metals
Coated metals
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The ‘Probe Type’ Code
S
2
C
Single or Twin
Crystal
Frequency in MHz
Size
A 6mm
B 8mm
C 13mm
D 19mm
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5. Gauge Operation
Gauge Controls
End view of gauge
Front view of gauge
Probe
Connection
Power
Key
Select
Keys
Menu
Key
Navigation
Keys
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Turning the Gauge On
1.
Press the Power key
2.
Cygnus Instruments Logo is
displayed
3.
The gauge details are displayed;
Model
Serial Number
Version Number
Run Time
4.
The gauge is ready to use
Turning the Gauge Off
1.
Press & Hold the Power key,
2.
The display shows ‘power-off’ and
the gauge turns off.
Automatic Power Off
By default the gauge will turn off automatically after 5 minutes of
in activity.
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Taking thickness measurements or accessing the menu will reset
the activity timer back to zero.
You can change the activity time value the Setup menu, see Power
Off Setting on page 45.
Status Information
At the top of the display is an area that shows information about
the gauge’s status;
• Battery Level
• Velocity of Sound value / Calibration Status
• Probe Type
• Measurement Mode
• Deep Coat Function
Probe Type; when the probe is connected the background colour is
green, when disconnected it is grey.
Taking Thickness Measurements
Taking ultrasonic thickness measurements is a straight forward
process that involves first making sure the surface is clean and
prepared, applying an ultrasonic couplant gel then placing the
probe on the surface and observ i ng the display for the
measurement.
Battery
Level
Measurement
Mode
Deep Coat
Function
Velocity, or
‘Calibrated’
Probe
Type
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Taking the Thickness Measurement
1.
Remove all scale, rust, dirt or loo se
coatings and brush the test area cl ea n .
2.
Apply ultrasonic couplant to the test
surface.
3.
Place the probe-face on the clean,
lubricated test surface and make firm
contact applying gentle pressure.
4.
The gauge will display a thickness
measurement.
Or an indication of Echo Strength if no
valid measurement has been found.
Echo Indicators in Multiple Echo Mode
Should the gauge be unable to detect a stable multiple echo signal
it displays an Echo indication to help the operator lo cate a suitable
position.
1.
1 Bar Flashing:
No echoes detected
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2.
1 steady + 1 Bar Flashing:
Only 1 echo detected
3.
2 steady + 1 Bar Flashing:
Only 2 echoes detected
4.
3 steady + 1 Bar Flashing:
3 echoes detected but they are
not matched
To help obtain a multiple echo reading the operator should
continue to move the probe around to locate a suitable reflector ,
using a slight rocking motion.
Display Hold Function
The thickness measurement can be ‘Held’ or frozen by simply
pressing the X/Cancel key while in the measurement screen.
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1.
A thickness measurement is
displayed
2.
Press the X/Cancel key to hold the
thickness measurement.
The measurement value now has
a light blue border to indicate its
held or froze.
3.
Press the X/Cancel key to un-hold
the thickness measurement.
Battery Life
The gauge will operate continuously for approximately 10 hrs
when fitted with Duracell Alkaline 1500 mA/hr batteries.
Battery Level
A battery level graphic is displayed at the top left position of the
display (arrowed);
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Battery almost full
Battery about 1/2 full
Battery low
Low Battery Indication
The gauge will perio d ic ally flash a red Low Battery warning sign
when the batteries have approximately 1 hour of use remaining.
Low battery indication
When the batteries are exhausted the gauge will display a Flat
Battery message for 5 seconds then turn off automatically.
Flat Battery message
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6. Calibration
Why should I Calibrate my Thickness Gauge?
Ultrasonic thickness gauges measu re time in order to measure the
thickness of the material being tested. The rely on the principal
that sound travels through a mat erial at a constant velocity or
speed. If you can accurately measure the time it takes to travel
through a material and you know its velocity then you can
calculate its thickness;
Thickness = time x velocity
2
Modern thickness gauge are easily capable of measuring time
accurately to 10 nano seconds (0.000,000,01 seconds) so th is i s
considered to be more than sufficiently accurate.
This means the accuracy of any thickness gauge measurement
relies principally on the velocity being correct for the material
being measured.
There are tables listing the velocity of most common metals and
materials, but these velocities are only “ty pical” values. For
example Mild Steel has a typical velocity of 5920 m/s – but in
practice when measuring a variety of mild steel samples the
velocity can range anywhere from 5860 to 5980 m/s.
This means if you want to achieve the most accurate thickness
measurements you must calibrate your thickness gauge to a
sample of the same material you will be testing – and a sample
that you can accurately measure the thickness of with a Vernier or
micrometer.
Your measurements are only as good as your calibration
Instructions for calibrating the gauge can be found on page 28
onwards.
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Calibration Options
The Gauge is supplied tested and calibrated. The Gauge will have
been calibrated to measure thickness through steel (grade
S355JO) with a velocity of sound of 5920 m/s.
Either a 15mm or 1/2” Test Block is supplied with the kit so the
Gauge can be quickly checked for correct operation. Note, this test
block is not intended to be used for cal i bration of the Gauge.
The best way to calibrate the Gauge is to
Calibrate using a
Known Thickness using a sample of the material you intend to
measure. This method determines the velocity of sound for
the material sample, which will always be more accurate than
using a ‘general’ velocity value. For calibration instructions
see page
28.
If there is no test sample available the Gauge can be calibrated by
Setting the Velocity of Sound directly. A table on page 56
at the
back of this manual lists common materials and their velocity of
sound value. For calibration instructions see page
29.
A third method is to leave the Gauge set to its factory-preset value
for Steel [5920 m/s or 0.2332 in/u s] , an d then use a Conversion
Factor from the table of velocities on page 56
.
Calibrating to a known thickness (Single or 1 Point)
This method of calibrating the gauge is more accurate than using a
standard velocity value as the gauge calculates the velocity of
sound for the sample material.
You can use this calibration meth od for all measurement modes.
1.
Accurately measure the
thickness of your sample
material.
25.40
mm
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2.
Place the Probe on the sample
and verify the gauge can get a
thickness value.
3.
Access the Menu and scroll down
to the ‘Calibration’ group. Then
scroll right to the ‘1 Point Cal’
item.
Press the Ok/Select key to open
the ‘1 Point Cal’ function
4.
While holding the probe firmly
on the sample, and while a
steady thickness measurement
is displayed..
5.
...use the Up and Down keys to
adjust the thickness to the
required value.
6.
When done press the OK/Select
key to save the calibration. A
Calibration Saved message will
be shown.
Or press the X/Cancel key to exit
without saving the calibration.
When a Calibration has been made a ‘1PC’ indictor is displayed at
the top of the measurement scre en in the status area (1PC =
Single Point Calibration).
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‘1PC’ Indicator
Setting the Velocity of Sound
The gauge uses the Velocity of So u n d value to calculate the
material thickness value. It is therefore important the velocity
value is set for the material being measured.
If you perform a Calibration the Velocity of Sound will be set
for you during the calibration – so you don’ t n eed to adjust it
afterwards.
You can manually set the velocity of sou n d value if required,
normally you would do this if;
• You can’t perform a calibrat ion
• You want to use the same velocity setting as last time
• You want to use a velocity from a material list
A list of velocity of sound values for common material can be
found on page 56.
1.
Access the Menu and scroll down
to the ‘Calibration’ group. Then
scroll right and select ‘Velocity’.
Press the Ok/Select key to open
the ‘Velocity’’ function
3.
If there has been a previous
Calibration a message will warn
that changing the velocity will
alter the calibration;
Press the OK/Select key to
continue, or X/Cancel to abort.
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4.
Use the Up and Down keys to
adjust the velocity value as
required
Use the Left and Right keys to
highlight the digit to change.
5.
When done press the OK/Select
key to save the changes.
Or press the X/Cancel key to exit
without saving.
When the velocity has been manually set the value is displayed at
the top of the measurement scre en in the status area.
Velocity of Sound value ‘5920 m/s’
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7. Gauge Setup
Menu Operation
1.
Press the Menu key,
2.
the Main Menu is displayed
3.
Use the four Navigation keys to
scroll around the Main Menu
4.
Use the Up and Down keys to
select a group in the left
column..
5.
Press the Right key to move to
the items in that group in the
right column.
Then use the Up and Down keys
to select from the right column
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6.
If you want to change or select
the item currently displayed
simply press the green Ok/Select
button
7.
Then use the Navigation keys to
highlight the required setting or
option
8.
Press the green Ok/Select key to
save your choice
9.
Or press the red X/Cancel key to
abort
6.
Press the Left key to go back to
the main group if you want to
make another selection
12.
To exit the menu press the Menu
or red X/Cancel key once.
Settings are Saved with the Probe Type
Certain gauge settings are saved a gainst the probe type. This
allows each probe type to have different settings that will be
recalled when that probe is re-connected and the probe type is
correctly set. The following settings are saved with each probe
type;
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• Units
• Resolution
• Velocity of sound
• Calibration
• Deep Coat
Changing Numeric Values using the Navigation Keys
Some menu functions require the user to input a numeric value
using the navigation keys. Th is is done ‘digit’ as a time, using the
Left and Right keys to select the digit, then the Up and Down keys
to change the highlighted digits value.
1.
The units digit is highlighted.
Pressing Up or Down will change
the units value only.
2.
Pressing the Left key will move
the highlight to the tens digit.
Pressing Up or Down will change
this value only.
3.
Pressing the Left key will move
the highlight to the hundreds
digit. Pressing Up or Down will
change this value only.
4.
Pressing the Left key will move
the highlight to the thousands
digit. Pressing Up or Down will
change this value only.
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Selecting the Probe Type
The Probe Type must be set to the probe connected to it. If
the wrong probe is selected the ga u ge will not measure
accurately if at all.
The Probe Type is displayed is displayed at the top of the
measurement screen in the status area. When a probe is
connected the background is green . When no probe is detected the
background is grey.
S2C Probe Selected and Connected
S2C Probe Selected but NOT Connected
1.
Access the Menu and scroll down
to the ‘Probe’ group. Then scroll
right and select ‘Probe Type’.
Press the Ok/Select key to open
the ‘Probe Type’ function
2.
Use the Up and Down keys to
select the Probe Typ e required
3.
Press the OK/Select key to save.
Or press the X/Cancel key to exit
without saving.
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Remember settings an d c alibration is saved with each probe
type. So if you change the probe ty pe you may find a setting
has changed – this is normal.
The reason settings are saved with each probe type is so you
can swap probes during a survey without having to re-
calibrate each time.
Automatic Probe Detection
There is no automatic probe detectio n feature on this model of
gauge. You must select if manually from the list of probes. See
Selecting the Probe Type on page 35.
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Measurement Units
The Gauge can display thickness measurements in either Metric
(mm) or Imperial (inch). Changing the measurement units will not
affect the calibration.
1.
Access the Menu and scroll down
to the ‘Measurement’ group.
Then scroll right and select
‘Units’.
Press the Ok/Select key to open
the ‘Units’ function
2.
Use the Up and Down keys to
switch from mm to Inch
4.
Press the OK/Select key to save.
Or press the X/Cancel key to exit
without saving.
Resolution Setting
The gauge can display thickness measurements in two resolution
settings:
• 0.1 mm 0.005 inch
• 0.05 mm 0.002 inch
For general metal corrosion measurement the 0.1 mm setting is
recommended.
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To change the Resolution setting:
1.
Access the Menu and scroll down
to the ‘Measurement’ group.
Then scroll right and select
‘Units’.
Press the Ok/Select key to open
the ‘Resolution’ function
2.
Use the Up and Down keys to
select the required Resolution
3.
Press the OK/Select key to save.
Or press the X/Cancel key to exit
without saving.
Limit Functions
The gauge has a Limit function that can be used to;
• Give v is u al indication of measurements between minimum,
reference and m aximum limits.
• Vibrate Alert the operator if measurements are outside the
minimum or maximum limits
The Limit function can be turned ON or OFF as required and the
Vibrate Alert can be enabled as re quired.
There are three Limit measurement values you can set;
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• Minimum Limit – this is the lowest t h i ckness measurement,
measurements under this value will cause an Alert
• Reference Limit – this is the ‘correct’ thickness value, or
when corrosion monitoring this is usually set to the thickness
of the steel/material when it was new.
• Maximum Limit – this is the highest thickness measurement,
measurements over this value will cause an Alert. This limit is
optional and can be set to zero.
When Limits are enabled the measurement screen displays a
horizontal bar-graph showing the limits and the current
measurement in relation to these limits. The colour of the bar also
changes from light green to dark green to red as t h e measurement
moves from the reference value to the minimum or maximum
limits.
Thickness Measurement = Reference = Light Green Bar.
Limit Example
Limits are setup;
Minimum = 5.00 mm
Reference = 10.00 mm
Maximum = 20.0 0 mm
The thickness measurement is 10.05
mm so the bar-graph shows a green
bar positioned at the Reference point.
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Now the thickness measurement is
8.05 mm so the bar-graph shows a
dark green bar positioned left of the
Reference point .
Now the thickness measurement is
5.10 mm so the bar-graph shows a
red bar positioned at th e Minimum
point.
Now the thickness measurement is
20.00 mm so the bar-graph shows a
red bar positioned at th e Maximum
point.
Now the thickness measurement is
25.45 mm so the bar-graph shows a
red bar positioned past the Maximum
point.
This exceeds the Max imu m limit so
will cause an Vibrate Alert to the
operator if enabled.
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1.
Access the Menu and scroll down
to the ‘Limits’ group. Then scroll
right and select ‘Limits’.
Press the Ok/Select key to open
the ‘Limits’ function
2.
Use the Up and Down keys to
turn Limits On or Off…
Press the OK/Select key to save.
Or press the X/Cancel key to exit
without saving.
3.
Use the Up and Down keys to
select the Minimum, Reference,
Maximum or Vibrate settings
Press the Ok/Select key to open
the selected item
4.
Use the navigation keys to
change the setting..
Press the OK/Select key to save.
Or press the X/Cancel key to exit
without saving.
Deep Coat Function
With the Deep Coat turned Off the gauge can measure through
most protective coatings up to 3 mm (0 .11”) thick when using a
S2C type probe. Coatings like paint, anti-foul, hard plastics and
epoxy should present no problems as long as they have not delaminated/de-bonded from the metal surface.
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With Deep Coat turned On this will allow the gauge to measure
through coatings over 3mm (0.11”) thick up to a maximum of
around 20 mm (0.78”) depen ding on the properties of the coating
material.
Measuring through thick coatings is ultimately limited by how well
the coating material allows the ultrasound to pass through, soft
coatings like rubber or bitumen don’t transmit ultrasound very
well.
Using Deep Coat will not affect the calibration.
Turn Deep Coat Off when NOT measuring through thick
coatings otherwise this may cause inaccurate measurements.
1.
Access the Menu and scroll down
to the ‘Measurement’ group.
Then scroll right and select
‘Deep Coat’.
Press the Ok/Select key to open
the ‘Deep Coat’ option
2.
Use the Up and Down keys to
select Deep Coat On or Off
3.
Press the OK/Select key to save.
Or press the X/Cancel key to exit
without saving.
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When Deep Coat is turned On a ‘DC’ indicator will be displayed in
the status area at the top of the measurement screen.
DC = Deep Coat is ON.
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8. Setup Menu
The Setup group is found at the bottom of the menu, it holds
various gauge setup options.
1.
Access the Menu and scroll down
to the ‘Setup’ group. Then scro l l
right to select the required item
Press the Ok/Select key to open
the highlighted item.
Vibrate Feature
The Vibrate feature will vibrate the gauge when a v e rified
thickness measurement is found to alert the user. You can use this
menu item to turn this On or Off as r equired.
Brightness Setting
The display brightness can be set Man u ally or Automatically using
the ambient light level sensor.
Higher brightness will consume more power so reduce the
battery life. To maximum the battery life choose the lowest
brightness that still allows you to read the display.
In Automatic mode the brightness is dimmed when in dark
conditions and increased when in bright light conditions.
In Manual mode you can adjust the brightness over 20 levels, 0 is
the lowest level.
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Manual Brightness Setting.
Power Off Setting
You can choose from three power-sa v ing settings, these det erm i ne
how long before the gauge will dim the display and ultimately turn
off when the gauge is inactive (inactive = no key presses and no
thickness measurements).
Power Save Modes.
Set Time and Set Date
These two items allow the user to set the gauges Time and Date if
required.
Set Time and Date Screens.
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Note. Although the Cygnus 4 gauge displays the time and date it
does not use them for any function.
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9. General Points On Thickness Gauging
On very rough surfaces and especially if both sides are badly
corroded, it is often necessary to move the Probe around to locate
a back wall reflector. Sometimes a slight rocking movement can
help find reflectors which are otherwise impossible.
Badly corroded sections can also be soaked with a light lubricating
oil to improve ultrasound coupling through to the good material.
Always ensure that there is p lenty of couplant present for good
contact, but beware that on a pitted surface the Gauge may just
measure the couplant-filled pit, always avoid measuring directly
over external pits.
Beware that in extreme conditions or if the plate is of poor quality
and contains many inclusions the ultrasound will be scattered to
such an extent that measurement may not be possible.
Beware that the multiple-echo technique will not work if the front
and back surfaces of the mater ial being measured are not close to
parallel. Also note that long narrow bars cannot be gauged along
their length with the multiple-echo method.
The Gauge should not be used near arc-welding equipment, as this
affects its performance.
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10. Troubleshooting
The Gauge will not Switch On
• Are the batteries exhausted?
• Check the batteries are inserted correctly.
Difficulty obtaining a Reading
• Check that the Probe lead is properly connected to both Probe
and Gauge.
• Check the gauge is set for the probe connected.
• Check the condition of the lead, replace if necessary.
• Check the Probe and its membrane are properly asse mbled (if
a single element probe).
• On heavily corroded areas this is often a problem, try and
take measurements in adjacent areas of the same material.
• Check the Gauge and Probe together on a test block, if there
is still no reading the Gauge may require servicing.
If Readings are Erratic or Unstable
• Check that the Probe-lead is properly connected to both
Probe and Gauge.
• Check that the Probe and its membrane are correctly
assembled with sufficient couplant between the probe face
and membrane.
• Check the Probe Type is suitable for the probable minimum
thickness of the material being measured. Probe frequencies
too low cause doubling and tripling of the actual thickness.
Tips for Optimising Battery Life
• Couplant left on the probe face will stop the gauge entering
low power saving mode – so wipe couplant off the probe face
between measurement sessions.
• Turning down the backlight brightness will extend battery life.
• Turn Bluetooth off if you are not using it.
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• When measuring on very heavily corroded metal with single
element probes the gauge uses more power searching for a
multiple echo match – this can significantly reduce battery
life. So if you are frequently measuring on very heavy
corrosion consider using a twin element probe as this will
require less power to get measurements.
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11. Updating your Gauge
As part of our policy of ongoing development and product
improvement Cygnus may issue firmware updates for your model
of gauge. The firmware on the gauge can be easily updated by
the user using update software downloaded from the Cygnus
website.
Before updating your gauge note the model and serial number of
the gauge (se e Turning the Gauge On on page 21). You can then
check on the Cygnus website if your gauge has the latest firmware
version, and if not proceed to download the update software.
You can check for the latest gauge firmware on the Cygnus
website [ http://www.cygnus-instruments.com
]. Navigate to
Support -> Downloads -> Technical Software and look for a
PDF document called ‘M5 Surface Gauge Firm ware Version Info’
view this document to find the latest version for your gauge along
with any changes made. Note yo u will n eed to create an account
to access this section of the website.
Update Software
To update a gauge you must first down load and install the ‘Cygnus
M5 Surface Gauge Updater’ software. This is available from the
Cygnus website in the Support -> Downloads -> Technical
Software section. There is a PDF document with instructions
available.
Gauge Firmware Files
You must download the appropriate Gauge Firmware file for the
model of gauge, there are three to ch oose from; Cygnus 2/2
+
,
Cygnus 4/4
+
or Cygnus 6+ PRO.
Once downloaded the gauge can be easily updates via the USB
cable connecting the gauge to the computer. The whole process
takes about 2 minutes. There is a PDF document with detailed
instructions available on the website.
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12. Care and Servicing
Cleaning the Gauge
Clean the Gauge and accessories with a damp cloth. Use
water with a mild detergent household cleaner.
Do not use solvents to clean the Gauge.
Do not use any abrasive cleaner, especially on the display
window.
Do not immerse the Gauge in liquid when cleaning.
Batteries
Always remove the batteries if the Gauge will not be used for
more than a few days.
Only use leak-proof batteries, Cygnus recommend Duracell
batteries.
Environmental
Do not immerse the Gauge in liquids. The gaug e is designed
to be IP67 but it is not intended for use in water.
Do not subject the Gauge to temperatures greater than 50˚C
(122˚F).
Do not store the Gauge for long periods in conditions of high
humidity.
Repairs
There are no user serviceable parts inside the Gauge.
Therefore all repair work should be carried out by Cygnus
Instruments or by an Authorised Cygnus Service dealer.
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Returning the Gauge for Servicing
A full Manufacturer’s Factory Service is available from Cygnus
Instruments.
The Complete Kit should always be returned for Service or
Repair, including all Probes and Leads.
Cygnus Gauges are renowned for their reliability, very often
problems with getting measurements are simply due to the way
the Gauge is being used.
However, if you do need to return y ou r Gauge for Repair please let
us know the details of the problem, to help us guarantee the best
possible service:
• Is the problem Intermittent Behaviour?
• Is there a problem turning the Gauge On?
Or a problem with the Gauge turning itself Off?
• Does the Gauge constantly give Incorrect Readings, or
Unsteady Readings?
• Is it not possible to Calibrate the Gauge?
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13. Information
Technical Specifications
Cygnus M5-C4 Technical Specifications
General Attributes
Size
84 mm x 130 mm x 35 mm (W x H x D)
(3.3 in x 5.1 in x 1.4 in)
Weight
Gauge with batteries 300 g (10.5 oz.)
Power Supply
3 x AA / R6 Batteries.
Probe Socket
1 x Lemo 1S
Operating Temperature Range
-10°C to +50°C (14°F to 122°F)
Storage Temperature Range
-10°C to +60°C (14°F to 140°F)
Battery Operation Time
Approximately 10 hrs. continuous measurem ent with fully
charged Duracell Alkaline LR6 batteries.
Battery Voltage Range
Min 3.0 V dc, Max 4.5 V dc
Battery Type
AA Size. LR6 Alkaline / HR6 NiMH.
Low Battery Indication
Batte ry level indication on display with low battery warning
message.
PRF
N/A
Monitor Outputs
N/A
Through Coating
Measurements
Multiple-Echo mode with Single element 0° probe;
• Through coating measurement for coatings up to 3 mm
thick as standard depending on coating velocity with S2C
probe.
• Deep Coat mode provides ability to measure through
thicker coatings depending on coating material with S2C
probe.
Materials
Sound velocity from 1000 m/s to 9000 m/s
[0.0390 in/us to 0.3543 in/us]
Measurement Ranges
Measurement ranges in steel.
Single element 0° probe s in Multiple Echo mode;
S2C/D probe
3 to 250 mm
[0.120 in. to 10.00 in.]
S3C probe
2 to 150 mm
[0.080 in. to 6.000 in.]
S5C/A probes
1 to 50 mm
[0.040 in. to 2.000 in.]
Probe Zero
Single element probes in multiple echo mode do not need to
be zeroed.
Measurement Modes
Multiple Echo using Single element probe. Uses three matched
and verified back-wall echoes to determine the material
thickness and ignore surface coatings.
High Temperature
All standard single element and twin element probes:
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Cygnus M5-C4 Technical Specifications
Measurement
Allows continuous measurement up to 75°C (160°F).
Resolution
Multiple Echo measurement modes;
Low
(measurement > 120 mm)
0.1 mm
[0.005”]
Medium
(measurement < 120 mm)
0.05 mm
[0.002”]
Accuracy
±0.1 mm (±0.004”) or 0.1% of thicknes s m ea s urement whichever is
the greatest.
Display
Type of Display
Colour TFT LCD with LED Backlight
Display Size
240 x 128 Pixels QVGA. 2.4“, 47 mm (W) x 37 mm (H)
Display Information
Digital Thickness Value. Settings. Battery Level.
Transmitter
Shape of Pulse
Square
Pulse Energy : Voltage (peakto-peak)
70 V p-p
Pulse Energy : Rise Time
3 ns (max)
Pulse Energy : Pulse Duration
S2C : 220 ns
S2D : 220 ns
S3C : 100 ns
S5A / S5C : 67ns
Receiver
Gain Control
Automatic Gain Control depending on probe and measurement
mode.
Frequency Range
1.0 MHz to 10.0 MHz (-6dB)
Other Information
Data Output and Storage
Non.
Data Connector
USB Mini B Connector under battery cover.
Calibration setting storage
Calibration Data stored to Internal Flash Memory
Calibration Mechanisms
Single Point calibration o f velocity of sound in Multiple Echo
mode.
Display & Recall Facilities
N/A
Display Response Time
125 ms / 500 ms
Printer Output
N/A
Environmental Rating
IP67 (Water immersion 1 metre depth for 30 minutes)
MIL STD 810G Method 501.6 (High Temp +55°C)
MIL STD 810G Method 502.6 (Low temp -20°C)
MIL STD 810G Method 507.6 (Humidity 95%)
MIL STD 810G Method 512.6 (Immersion 1m, 30min)
Shock & Impact
MIL STD 810G Method 514.7 (Vibration)
MIL STD 810G Method 516.7 (Shock 20g)
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Cygnus M5-C4 Technical Specifications
MIL STD 810G Method 516.7 (Transit Drop 1.22m)
Compliance
RoHS Complia n t.
Designed for BS EN 15317:2013.
CE Marked including EMC.
Specifications are subject to change for p roduct improvement.
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Table of Sound Velocities
Velocities will vary according to the pre cise grade and processing
conditions of the material being measured.
This table is included as a guide only.
Wherever possible, the Gauge should always be calibrated on
the material under test.
These Velocities are given in good faith and are believed to
be accurate within the limits described above.
No liability is accepted for errors.
Velocities given are the compressional wave velocity cl.
Material
Velocity of Sound (V)
Conversion
Factor (f)
m/s in/us
Aluminium (alloyed)
6380
0.2512
1.078
Aluminium (2014)
6320
0.2488
1.068
Aluminium (2024 T4)
6370
0.2508
1.076
Aluminium (2117 T4)
6500
0.2559
1.098
Brass (CuZn40)
4400
0.1732
0.743
Brass (Naval)
4330
0.1705
0.731
Brass (CuZn30)
4700
0.1850
0.794
Copper
4700 - 5000
0.1850 – 0.1969
0.794 – 0.845
Core Ten
5920
0.2331
1.000
Grey Cast Iron
4600
0.1811
0.777
Inconel
5700
0.2244
0.963
Lead
2150
0.0846
0.363
Monel
5400
0.2126
0.912
Nickel
5630
0.2217
0.951
Phosphor Bronze
3530
0.1390
0.596
Mild Steel
5920
0.2331
1.000
Tool Steel
5870
0.2311
0.992
Stainless Steel 302
5660
0.2228
0.956
Stainless Steel 347
5790
0.2279
0.978
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Stainless Steel 304
5664
0.2229
0.956
Stainless Steel 314
5715
0.2250
0.965
Stainless Steel 316
5750
0.1163
0.971
Tin
3320
0.1307
0.561
Titanium
6100 - 6230
0.2402 – 0.2453
1.030 – 1.052
Tungsten Carbide
6660
0.2622
1.125
Reading Conversions
If only a few measurements are to be taken on a material other
than Steel, it may be easier to leave the calibration set for Steel
and merely convert th e readings by multiplying by the
Conversion Factor for the material being measured.
This method avoids unnecessary recalibration.
Example.
The Gauge is calibrated for Steel [5920 m/s], but the reading is
being taken on Copper [4700 m/s] :
T = t x V
COPPER
/ V
STEEL
= t x 4700 / 5920
= t x 0.794
thus : T = t x f [ where: f = V
COPPER
/ V
STEEL
]
where : T = true thickness of Copper being measured
t = actual reading obtained
f = Conversion Factor (from table)
V
COPPER
= Sound Velocity in Copper : 4700 m/s
V
STEEL
= Sound Velocity in Steel : 5920 m/s
The Conversion Factor f: is given for various materials in the
Table of Sound Velocities
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14. EU Declaration of Conformity
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15. Recycling and Disposal (EC Countries)
The WEEE Directive (Waste Electrical and Electronic Equipment
2002/96.EC) has been put into place to ensure that products are
recycled using best available treatment, recovery and recycling
techniques to ensure human health and high environmental
protection.
The Gauge has been designed and manufactured with high quality
materials and components which can be recycled and reused. It
may contain hazardous substances that could impact health and
the environment. In order to avoid the dissemination of those
substances in our environment and to diminish the pressure on
natural resources we encourage you to dispose of this product
correctly.
DO NOT dispose of this product with general household
waste.
DO dispose of the complete prod u ct i n cluding cables,
plugs and accessories in the designed WEEE collection
facilities.
This product may also be returned to the agent or manufacturer
who supplied it for safe end-of-life disposal.
Cygnus Instruments Ltd registration number for The WEEE
Directive is WEE/HE1274RU.
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16. Warranty Information
LIMITED THREE YEAR WARRANTY
FOR CYGNUS ULTRASONIC THICKNESS GAUGES
1. Cygnus Instruments Limited (“CYGNUS”) warrants that, subject as set out below,
the Products manufactured by it (excluding consumables, batteries, probes, leads,
microphones and telescopic extensions) will be free from defects in materials and
workmanship for a period of three years from the date of purchase either from
CYGNUS or from an Authorised CYGNUS Distributor. Batteries, probes, leads,
microphones and telescopic extensions are warranted for 6 months. This warranty is
limited to the original Purchaser of the Product and is not transferable. During the
warranty period, CYGNUS will repair, replace or refund, at its option, any defective
Products at no additional charge, provided that the product is returned by the
original Purchaser, shipping prepaid, to CYGNUS or an Authorised CYGNUS
Distributor. If shipped by mail or any common carrier, the Purchaser must insure
and accept all liability for loss or damage to the Product and must use shipping
containers equivalent to the original packaging. Replacement products or parts will
be furnished on an exchange basis only. All replaced products or parts become the
property of CYGNUS.
2. Any defects in ma terials or workm a n s hip m us t be no ti f ie d to CYGNUS by the
Purchaser within seven days after the discovery of the defect or failure.
3. Dated proof of purchase must be provided by the Purchaser when requesting
warranty work to be performed or making any other claim under this warranty.
CYGNUS will not be liable under this warranty unless the total price for the Product
was paid by the due date for pay me nt.
4. This warranty does not exten d to any pro du ct s whic h have be en da ma ge d as a
result of, accident, misuse or abuse, natural or personal disaster, service,
modification or repair by anyone other than CYGNUS or an Authorised CYGNUS
Service Centre, failure to properly store or maintain the Product, negligence,
abnormal working conditions, fair wear and tear, or failure to follow the instructions
issued by CYGNUS in relation to the Product.
5. Except as expressly set forth above or in the CYGNUS Terms of Sale, subject to
which the Products were purchased, all warranties, conditions or other terms implied
by Statute or Common Law are extended to the fullest extent permitted by law.
6. Except in respect of death or personal injury caused by the negligence of Cygnus,
Cygnus shall not be liable to the Purchaser or to any other person by reason of any
representation (unless fraudulent), or any implied warranty, condition or other term,
or any duty at common law, or under the express terms of the contract for purchase
of the Products, for loss of profit or for any indirect, special or consequential loss or
damage, costs, expenses or other claims for compensation whatsoever (whether
caused by the negligence of Cygnus, its employees or agents or otherwise) which
arise out of or in connection with the supply of the Products or their use or resale by
the Purchaser or by any other person. The entire liability of Cygnus under or in
connection with the Products shall not exceed the price paid for the Products, except
as expressly provided in this warranty.
M5-CYG4-M-01_Iss6.doc
Cygnus 4 Operating Manual
61
17. Index
Automatic Power Off, 21
Batteries
Fitting, 10
Level, 26
Life, 25
Low Battery Warning, 26
NiCad, 10
NiMH, 10
BS EN 15317:2007, 28
Calibration
Conversion Factor, 57
Known Thickness, 28
Single Point, 28
Velocity of Sound, 30
Deep Coat, 41
Disposal, 59
Gauge
Cleaning, 51
Display, 20
Keys, 20
Serial Number, 21
Ignore Coatings, 14
Imperial, 37
Main Menu, 32
Measurement
Pitted surface, 47
Measurement
Resolution, 37
Rough surfaces, 47
Units, 37
Metric, 37
Multiple Echo, 14
Echo Bars, 23
Neck Strap, 11
Power button, 21
Probes
Automatic Detection, 36
Cable, 11
Connector, 20
Knurled Ring, 17
Membrane Couplant, 17
Membrane Key, 1 7
Polyurethane Membrane
Membrane, 15
Type, setting, 35
Recycling, 59
Repair, 52
Resolution, 37
Service, 52
Sound Velocities, 56
Test block, 28
Thick Coatings, 41
Thickness Measurement, 23
Troubleshooting, 48
Units, 37
Warranty, 60
WEEE Directive, 59
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