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Cygnus M3-DIVE, Operation Manual

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Cygnus M3-DIVE Operation Manual Download Page 39

Cygnus DIVE Operating Manual 

M3-DIVE-M-ENG_Iss9.docx 

 

Page 39 of 117 

 

Taking a Thickness Measurement 

Taking a Thickness Measurement 

1 

Remove any marine growth, loose 
rust or loose coatings and brush the 
test area clean. 

 

2 

When measuring underwater there is 
no need to use a couplant - the water 
itself will act as a couplant. 

 

3 

When measuring in air apply some 
couplant gel to the test surface. 

 

4 

Place the probe-face on the prepared 
test surface and make firm contact 
applying gentle pressure. 

 

5 

The gauge will display a thickness 
measurement or an indication of Echo 
Strength if no valid measurement has 
been found. 

 

Measuring Small Pipe with Twin Crystal Probes 

 

Twin Crystal probes must be orientated correctly when 

measuring pipes under 75mm (3”) diameter, see 

Measuring 

Small Diameter Pipe & Tubes on page 30. 
 

Signal Strength Indication 

The vertical signal bars on the left side of the display show the 

relative strength of the received ultrasound signal - the more bars 
shown, the stronger the received signal. 
 

Summary of Contents for M3-DIVE

Page 1: ...Cygnus DIVE Ultrasonic Thickness Gauge for Divers Operation Manual Covers Gauge Model M3 DIVE Doc No M3 DIVE M ENG_Iss9 docx June 2021 Mk3 DIVE Gauges...

Page 2: ...ic Probe 16 Important Cap Fitment 16 Connecting the Probe 16 Probe Calibration Check Message 17 Securing the Probe while Diving 18 6 Ultrasonic Probes Transducers 19 Important Notes 19 Probe Types 19...

Page 3: ...ation 39 Echo Bars in Multiple Echo Mode 40 Stability Indication in Single Echo Echo Echo Modes 41 10 Interpreting the A Scan Display in Multiple Echo Mode42 Pits and Flaws 43 Heavy Corrosion 44 11 In...

Page 4: ...Measurement Screen while Data Logging 67 Starting a Data Logging Session START LOGGING 68 Ending a Data Logging Session STOP LOGGING 68 Starting a new Group of Measurements START NEW GROUP 69 Deletin...

Page 5: ...necting to the Gauge Afterwards 85 Disconnecting from the Gauge 85 Manual Connection Settings 85 Changing Gauge Settings 86 Material Velocity List 86 A Scan Measurement Cursors 87 Using the A Scan Cur...

Page 6: ...101 Ultrasonic Probes 101 Probe Spares for S C 13mm Probes 101 Probe Spares for S A 6mm Probes 101 Gauge Spares 102 Accessories 102 Miscellaneous Spares 103 22 Technical Specifications 104 23 Table o...

Page 7: ...the thickness survey A bright colour display shows the thickness measurement in large numbers Thickness measurements are further backed up by an A scan display Measurement data can be sent to the sur...

Page 8: ...unrivalled reputation in over 45 countries around the world CYGNUS Instruments Ltd Cygnus House 30 Prince of Wales Road Dorchester Dorset DT1 1PW England Website www cygnus instruments com Tel 00 44 0...

Page 9: ...Body and Wrist Strap 2 Ultrasonic Probe s with Coiled Cable 3 Two Rechargeable Batteries 4 Membrane Couplant 25ml bottle 5 Battery Charger and Charger Base 6 AC Mains Lead for Battery Charger 7 Ultras...

Page 10: ...ctor Fitting the DIVE Gauge The DIVE gauge can be worn on the fore arm of the diver allowing one hand to remain free during thickness surveys The gauge is secured with a tough elasticated strap with a...

Page 11: ...g Loop The DIVE gauge can be worn on the right or left arm of the diver as required The probe can be connected into either of the two probe sockets on the gauge body they are both identically wired Th...

Page 12: ...Cygnus DIVE Operating Manual M3 DIVE M ENG_Iss9 docx Page 12 of 117 Security Lanyard fitted to D ring...

Page 13: ...battery contains lithium and therefore MUST NOT be taken into a Hyperbaric Condition IMCA D 041 Shipping of Lithium Batteries Please see Section 25 Shipping of Lithium Ion Batteries on page 110 Fittin...

Page 14: ...tery retaining screw clockwise to engage the screw into the battery Finger tight only the should be no gaps between the battery screw and the body DO NOT use a tool to tighten Removing the Battery The...

Page 15: ...the supplied Cygnus battery charger and base The battery is inserted into the charger base taking care to align the two battery contacts The light on the black charging unit will light as follows Red...

Page 16: ...with this socket exposed to water Accidental removal of the Cap while underwater WILL NOT cause the gauge to flood Simply re fit the Cap as soon as possible Packing silicone grease in the connections...

Page 17: ...ned for the connectors to mate To release the probe connector you must pull back the connector front part of the body A as you pull the connector out of the gauge body If the connector appears tight p...

Page 18: ...ed with one hand To secure the probe if not already press the toggle and push it back towards the gauge body to make the loop large The probe can then be tucked under the loop and the toggle pressed a...

Page 19: ...of corrosion defects but require more awareness and training to avoid measurement errors Ideally a surveyor s kit would contain one of each probe type enabling any survey to be tackled with the confid...

Page 20: ...hen measuring Heavy Corrosion heavy corrosion will absorb and scatter the ultrasound signal so there is often only enough ultrasound reflected back to the probe to provide a single echo Identifying Si...

Page 21: ...ble in each probe type These different probe frequencies allow measurement of different materials Twin Element Probes Probe Type Details Applications Identification T5B 5 MHz 2 x 8 mm 0 5 A twin eleme...

Page 22: ...hin section plate and other areas where access is limited Black Band Lower frequency probes offer better penetration on heavy corrosion coatings Probe Measurement Ranges Each probe type has a defined...

Page 23: ...cx Page 23 of 117 Probe Type Measurement Range in steel S5A 1 0 50 mm 0 04 2 inch The three letter Probe Type code can be easily decoded S 2 C Single or Twin Element Frequency in MHz Size A 6mm 1 4 in...

Page 24: ...s Shipping Surveys General purpose use 2 Painted bare metals Corrosion non to moderate Thickness 2 to 150mm 0 1in to 6in 1 3 Painted bare metals Corrosion non to light Thickness 1 to 50mm 0 05in to 2i...

Page 25: ...t when used in Single Echo mode Single Element Probes and Protective Membranes All Cygnus single element probes have a soft face and are therefore fitted with a Polyurethane Membrane which provides be...

Page 26: ...ded 3 Place a new membrane into the end 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 drop...

Page 27: ...obe Wear Indication The twin element probes have a hard face that under normal use should last a long time However this hard face will gradually wear down due to the abrasive action of measuring corro...

Page 28: ...ess measurement is valid This method has been used in all Cygnus gauges since the late 1970s Multiple echo mode will ignore surface coatings Through Coating mode there is no need to remove the paint t...

Page 29: ...gauge has an A Scan display that can be used to visually verify the thickness measurements are sensible and therefore reliable Echo Echo Mode EE Echo Echo mode uses a twin element probe but measures b...

Page 30: ...asuring Small Diameter Pipe Tubes When measuring small diameter pipe and tubes with a twin element probe 75mm 3 or under you must ensure the face of the probe is correctly aligned to the curvature of...

Page 31: ...is 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 an...

Page 32: ...r button until the gauge turns on this may take up to 5 seconds Note Turning the gauge back on from standby will skip the following two steps The next screen displays the Serial Number Software Versio...

Page 33: ...probe is worn out a message will be displayed See Twin Element Probe Wear Indication on page 27 Probe Zero Done Turning the Gauge Off While there is a battery fitted the gauge goes into a Standby mod...

Page 34: ...rane is in good condition and there are NO air bubbles between the membrane and probe face 5 Plug in the probe connector and check the gauge identifies the probe correctly 6 If required Zero the probe...

Page 35: ...ge is operating the measurement screen is displayed No Probe Connected Message When the probe is disconnected from the gauge a NO PROBE message is displayed Measurement Units Velocity of Sound Echo Ba...

Page 36: ...urns Red and a Low Battery message is flashed at the top of the screen When the battery is flat the gauge will be turned off automatically A message will be briefly displayed as the gauge turns off Di...

Page 37: ...mode the echo point is marked by a single arrow below the X axis A Scan Display in Single Echo Mode In Single Echo mode the A Scan display will always be displayed and cannot be turned off Surface Pre...

Page 38: ...When using Multiple Echo mode you DO NOT need to remove any paint or surface protection the gauge is designed to read through and ignore these layers If there is loose rust rusticles or de lamination...

Page 39: ...e probe face on the prepared test surface and make firm contact applying gentle pressure 5 The gauge will display a thickness measurement or an indication of Echo Strength if no valid measurement has...

Page 40: ...Bar Flashing No echoes detected 1 steady 1 Bar Flashing Only 1 echo detected 2 steady 1 Bar Flashing Only 2 echoes detected 3 steady 1 Bar Flashing 3 echoes detected but they are not matched To help...

Page 41: ...ickness measurement number from Red to Yellow when the measurement has been stable for 2 consecutive seconds When measuring using SE or EE mode once you have a measurement keep the probe still and wai...

Page 42: ...u are measuring This pulse then travels through the object both paint and metal and is reflected back to the probe as an echo by either the back wall of the object and or any internal flaws or corrosi...

Page 43: ...The A scan below shows the echo pulses of ultrasound as measured in a flat un corroded unpainted piece of steel 12 5mm thick Flat new steel 12 5mm thick You can easily identify the individual echo pu...

Page 44: ...pit or flaw obscure the pulses from the material back wall the gauge may not be able to determine a Multiple Echo thickness measurement the A scan below shows a mixture of echo pulses that are spaced...

Page 45: ...measurements is to try slowly moving the probe around the area looking for points where the echo pulses are stronger and more defined keeping an eye on the A scan so you spot better areas If you stil...

Page 46: ...robe surface a signal is received by the DIVE gauge this signal is shown on the A scan display as an echo peak The A Scan display is very useful when measuring in Single Echo mode as there is no Verif...

Page 47: ...ear ultrasound signal There are lots of echoes and it s not very clear which is the correct back wall echo It is probably the biggest peak of the way across the A scan graph but the gauge may not dete...

Page 48: ...h the probe face as the gauge may incorrectly measure the depth of the couplant Large Corrosion Pits The A Scan display can assist you you will see a unclear ultrasound signal with no distinct back wa...

Page 49: ...Scan shows a clear 1st and 2nd echo and the gauge has correctly measured 12 1 mm The echo echo measurement is indicated by the solid Yellow which starts at the 1st echo and ends at the 2nd echo No Me...

Page 50: ...s Right Button Press Both Buttons Pressed Together Both Buttons being pressed is generally used to Save Exit Button Functions in Menus Menus are lists of items you scroll down the list and select the...

Page 51: ...m or inches Left Button Decrease or change the value Right Button Increase or change the value Both Buttons Save and Exit the setup screen Gauge Settings Saved with Probe Type Certain gauge settings a...

Page 52: ...e 52 of 117 Displaying the Menu To display the main Menu press the Left Button once Measurement Screen Main Menu Screen Pressing the Left Button again will scroll down the Menu List one step each pres...

Page 53: ...Main Menu DATA LOG MENU START LOGGING Data Logging Stopped CLEAR MEMORY DATA LOGGER STATUS DELETE LAST Data Logging Started STOP LOGGING START NEW GROUP CLEAR MEMORY DATA LOGGER STATUS DEEP COAT Mult...

Page 54: ...can choose from the following A Scan range values AUTO The gauge automatically adjusts the A scan range 15 mm 0 6 Measuring material up to 15 mm thick 30 mm 1 2 Measuring material up to 30 mm thick 60...

Page 55: ...right button when the measurent screen is displayed Note In Single Echo mode the A Scan display will always be displayed and cannot be turned off A Scan Setup Screen Setting the Velocity of Sound VELO...

Page 56: ...tiple and Single Echo modes Calibrating to a Known Thickness 1 Accurately measure the thickness of your sample material 2 Place the Probe on the sample 3 the gauge should be displaying a thickness val...

Page 57: ...e To achieve maximum accuracy in Single Echo mode you must perform a Two Point Calibration your measurement is only as good as your calibration When performing a two point calibration both sample thic...

Page 58: ...will be using Then set these two thickness values in the gauge s Calibrate 2 Point menu Calibrate 2 Point menu 3 Set the minimum thickness value Select SET MIN THICKNESS from the menu Use the left and...

Page 59: ...ement displayed is stable press the Right button once this will perform the calibration based on the values seen 8 Check the new thickness value displayed is acceptable If not you can press the Left b...

Page 60: ...sition and thus introduce small errors in the thickness measurement Typically over a 20 C change in temperature the measurements can shift by 0 1 mm It is recommended to frequently re zero the twin cr...

Page 61: ...nge the material simply select the NO CHANGE option When the material is selected the gauge will display a brief confirmation message This list uses typical velocity values in practice the actual velo...

Page 62: ...ay the thickness measurement in 0 05mm or 0 1mm resolutions 0 002 or 0 005 Inch To change the resolution select RESOLUTION from the Main Menu Decreasing the resolution may help the gauge to obtain a M...

Page 63: ...s ultimately limited by how well the coating material transmitts the ultrasound soft coating like rubber or bitumen don t transmit ultrasound very well If you need to measure through a coating over 3...

Page 64: ...be being used To change the probe type select PROBE TYPE from the Main Menu The probe type must be correctly set to match the probe being used otherwise thickness measurements will be impossible or in...

Page 65: ...be selected from 3 choices Short 1 minute to off Medium 2 minutes to off Long 5 minutes to off Note Keeping the backlight on for longer will reduce the battery life To change the power save setting s...

Page 66: ...sing any buttons Because the AutoLog feature works on timing it is best to practice data logging before the dive so you understand how to log the desired measurements AutoLog Feature To remove the nec...

Page 67: ...pID number enabling you to further group the measurements The GroupID number is always incremented when a new data logging session is started but the diver can also start a new group whenever they cho...

Page 68: ...e DATA LOG MENU 2 Select START LOGGING 3 Change from NO to YES 4 Press both buttons together to save and exit Start Logging Screen Started Message Ending a Data Logging Session STOP LOGGING This funct...

Page 69: ...a new group of measurements by increasing the GroupID by 1 To start a new group 1 Access the DATA LOG MENU 2 Select START NEW GROUP 3 Change from NO to YES 4 Press both buttons together to save and ex...

Page 70: ...the Data Logger Memory CLEAR MEMORY You can delete all the measurements from the gauge s memory ready to start a new survey To clear the data logger memory 1 Access the DATA LOG MENU 2 Select CLEAR ME...

Page 71: ...exit Data Logger Status Screen Setting the AutoLog RELEASE period DLOG RELEASE TIME The period of time the diver must Release the probe from the surface before the next thickness measurement can be Au...

Page 72: ...s the diver to view thickness measurements in limited visibility or black water HelmetView is supplied as a remote display unit with 1 5 meters of cable with connector and a mounting bracket to suit t...

Page 73: ...View Unit Fixed to Mounting Bracket The bracket is then fixed to the Kirby Morgan helmet using the left hand side accessory screw The cable will exit to the rear of the helmet and the display will be...

Page 74: ...ilable which will overlay the thickness measurement onto a composite PAL or NTSC video signal Mk4 Cygnus Topside Repeater TSR Part Numbers The TSR kit can be supplied as an additional feature with any...

Page 75: ...with the Red Triangle Changing the Displayed Units To change the displayed measurement units between metric mm and imperial inch press the left MENU key the UNITS setting will be highlighted then pre...

Page 76: ...on both the TSR and the DIVE gauge then measure the test block the TSR should display the same measurement as the gauge Changing the Batteries The non video overlay TSR operates from 2 x AA batteries...

Page 77: ...The TSR will automatically detect and adjust for PAL or NTSC video signals it will work with colour or monochrome images Positioning the On Screen Display Because there is usually other information d...

Page 78: ...ay the MENU 2 Press the DOWN ARROW key to scroll down to OSD X POS 3 Press EDIT to adjust the X screen position Press EXIT to save and exit 4 Press the DOWN ARROW key to scroll down to OSD Y POS 5 Pre...

Page 79: ...nto a Survey report 8 Transferring data logged measurements out of the DIVE gauge 9 Estimation of thickness from A scan graph and data logging of this estimated thickness value Part Numbers The CygLin...

Page 80: ...ection s from page 113 Using CygLink with HelmetView As HelmetView and CygLink both need to connect to the spare connector on the gauge a Y splitter cable is required For the part number see Accessori...

Page 81: ...1GB of memory Upgrading You can check the Cygnus Instruments website for the latest version of CygLink V5 If you are upgrading from an older version of CygLink then you must uninstall the old version...

Page 82: ...you can set in manually from the File Communications Options menu item Just tick the Manual Setup box and select the correct COM port number Finding your COM Port Number With the USB RS485 Converter...

Page 83: ...n you first connect the gauge to the computers USB port Windows will search for a suitable driver you may notice this message from the taskbar If you click the message you should see the driver instal...

Page 84: ...ck Connect Discover new Gauge and Connect 4 CygLink will search all the available Com ports listening for a Cygnus gauge If a gauge is detected then it will connect and save these settings for next ti...

Page 85: ...nect next time simply click from the menu Connect Connect to Mx DIVE Gauge Disconnecting from the Gauge 1 To disconnect from the Gauge simply click from the menu Connect Disconnect from Gauge Manual C...

Page 86: ...You can change the Units Measurement mode Velocity Deep Coat and A Scan Range Any changes will be sent to the gauge and also update CygLink Measurement Settings Screens Material Velocity List You can...

Page 87: ...the Cursors button to move the cursors left click and hold at the cross wire intersection The distance between them is displayed as a thickness measurement using the current velocity of sound value A...

Page 88: ...hickness measurements in a single Survey file These measurements are organised into Survey Groups each Survey Groups can contain any number of thickness measurements The whole Survey can be saved to a...

Page 89: ...Editing the Survey Details The Survey contains all the Groups and is used to save all the data You can also add details to the Survey that will be printed at the beginning of the PDF report To create...

Page 90: ...press Save Producing a Survey Report Document A PDF report can be produced containing all the Groups and thickness measurements in the Survey grouped by each Survey Group From the File menu select Cr...

Page 91: ...a connected DIVE gauge into the CygLink Survey From the menu select Gauge then Transfer Records from Gauge you will then need to confirm the action Gauge Menu Confirm Transfer of Record from DIVE Gaug...

Page 92: ...ckness measurement will create a new record and add a measurement into the group Reference and Minimum Thickness Criteria You can set a Reference Thickness and Minimum Thickness for each survey Group...

Page 93: ...surement Comments Screen Adding Comments or Notes to a Measurement You can add your own quick text Notes to any logged thickness measurement just select the measurement point in the list and right cli...

Page 94: ...emembered You may change the number assigned to the port by following these steps Opening Device Manager Each version of Windows has a slightly different procedure for opening Device Manager The most...

Page 95: ...Connection Problems USB Drivers If you are unable to get a connection the first thing to try is updating the USB drivers for the Serial to USB converter Windows is constantly being updated and as a re...

Page 96: ...correctly the green LED will flash every time the DIVE gauge sends data the red LED will flash when CygLink sends data to the DIVE gauge Wiring Problems Sometimes the cable between the DIVE gauge and...

Page 97: ...beam it must be shone straight into the material so it can reflect straight back If you tilt the probe the beam may not reflect back to the probe and you won t get a measurement Beware that in extreme...

Page 98: ...rge the battery with the supplied charger Occasionally6 give the batteries a recharge cycle of 14 16 hours to recondition the batteries and extend their life Read Section 25 Shipping of Lithium Ion Ba...

Page 99: ...ly disposed of locally Please read Section 25 Shipping of Lithium Ion Batteries on page 110 The Complete Kit should always be returned for Service or Repair including all Probes and Leads Cygnus gauge...

Page 100: ...trap push the new pins fully into the holes then re fit the two grub screws taking care not to over tighten the grub screws 10 Ncm is sufficient Wrist Strap Pin Securing Grub Screw Push Buttons The pu...

Page 101: ...embranes and membrane key Suitable for measuring small tubes from 1 to 50mm through very thin coatings 001 7235 Probe T5B 5MHz 2 x 8mm for Cygnus DIVE Probe and coiled cable Suitable for measuring hea...

Page 102: ...nects surface end of Umbilical Cable 001 7260 to a computers USB port and converts the signal from RS485 to USB 1 8m Long 001 0426 Umbilical 9 way D to TSR Display Unit Lemo Link Lead Connects surface...

Page 103: ...or 001 7223 for Cygnus supplied umbilical cable 001 0415 Umbilical cable for DIVE to Topside per metre Specify cable length from 50m to 500m 001 7224 HelmetView Remote Display Kit for Cygnus DIVE Helm...

Page 104: ...y Operation Time Approximately 10 hrs continuous measurement with fully charged battery pack Battery Voltage Range Min 3 2 V dc Max 4 5 V dc Battery Type Sealed Lithium Ion rechargeable single cell 8...

Page 105: ...olution 0 1 mm 0 005 Low Resolution Mode or measurement 99 95 mm 0 05 mm 0 002 High Resolution Mode and measurement 100 0 mm 0 01 mm 0 001 Single Echo Mode only and measurement 100 0 mm 0 05 mm 0 002...

Page 106: ...n for twin crystal probes Display Recall Facilities N A Display Response Time 125 ms 500 ms Printer Output N A Environmental Rating IP68 Rated to 300 m 984 ft immersion in sea water MIL STD 810G Metho...

Page 107: ...mpression 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...

Page 108: ...nts are to be taken on a material other than Steel it may be easier to leave the calibration set for Steel and merely convert the readings by multiplying by the Conversion Factor for the material bein...

Page 109: ...gh 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 subst...

Page 110: ...UST NOT be shipped back to Cygnus Instruments their agent or distributor It is forbidden to transport faulty or damaged lithium batteries they must be correctly disposed of locally Battery Information...

Page 111: ...k 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 payment 4 This warrant...

Page 112: ...al M3 DIVE M ENG_Iss9 docx Page 112 of 117 27 Pressure Test Statement All Cygnus DIVE gauges are pressure tested in water as part of our test procedures Please refer to the environmental rating sectio...

Page 113: ...Cygnus DIVE Operating Manual M3 DIVE M ENG_Iss9 docx Page 113 of 117 28 Connection Diagram Umbilical Cable...

Page 114: ...Cygnus DIVE Operating Manual M3 DIVE M ENG_Iss9 docx Page 114 of 117 29 Connection Diagram Umbilical to TSR...

Page 115: ...Cygnus DIVE Operating Manual M3 DIVE M ENG_Iss9 docx Page 115 of 117 30 Connection Diagram DIVE to Umbilical...

Page 116: ...ments 93 Cursors 87 Drivers 83 Gauge Settings 86 Installation 81 Logging 91 92 Material Table 86 PDF 90 Requirements 81 Datalogging AutoLog 66 AutoLog RELEASE 71 Capacity 66 Clearing Memory 70 Groupin...

Page 117: ...cho 28 Resolution 62 Software Version 32 Sound Velocities 107 Specifications 107 Surface Preparation 37 loose rust 38 Thickness Measurement 39 Through Coating 28 Topside Repeater Automatic Display Bac...

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