Elcometer CG20 Operating Instructions Manual
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Elcometer CG20 Operating Instructions Manual

Corrosion gauge
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Model CG10 & CG20
Corrosion Gauge
Operating Instructions

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Summary of Contents for Elcometer CG20

  • Page 1 Model CG10 & CG20 Corrosion Gauge Operating Instructions...
  • Page 2 The following trademarks are registered trademarks of Elcometer Limited, Edge Lane, Manchester, M43 6BU. United Kingdom: Material Safety Data Sheets for the ultrasonic couplant supplied with the CG10 & CG20 and available as an accessory, are available to download via our website: Elcometer NDT Ultrasonic Couplant Material Safety Data Sheet : www.elcometerndt.com/images/MSDS/elcometer_ultrasonic_couplant.pdf...

  • Page 3: Table Of Contents

    Contents About your Gauge ..............1 The Keypad .

  • Page 4: About Your Gauge

    Thank you for purchasing this Elcometer product. Welcome to Elcometer NDT. The Model CG10 and CG20 Corrosion Gauges are world beating products. With the purchase of this gauge you now have access to the worldwide service and support network of Elcometer NDT. For more information visit our website at www.elcometerndt.com.
  • Page 5 Consult your Local Environmental Authority for further guidance. To maximise the benefits of your new Elcometer NDT gauge, please take some time to read these Operating Instructions. Do not hesitate to contact Elcometer NDT or your Elcometer NDT supplier if you...

  • Page 6: The Keypad

    Model Press to switch the gauge on or off. CG10 When switching off, the gauge retains all of its settings. CG20 If the gauge is idle for 5 minutes, it will switch itself off. Press to change units (metric/imperial) CG10 CG20 Switches the display backlight between three settings;...

  • Page 7: Getting Started

    3. Replace battery compartment cover. Note: Remove the batteries from the gauge if it is to remain unused for a long period of time. This will prevent damage to the gauge in the event of malfunction of the batteries. Model CG20...
  • Page 8 The transducer connects to the gauge via the attached cable, and two coaxial connectors. When using transducers manufactured by Elcometer NDT, the orientation of the dual coaxial connectors is not critical; either plug may be fitted to either socket.

  • Page 9: The Display

    4 THE DISPLAY Stability indicator Units (IN, MM, IN/µs, M/s) • One vertical bar - no readings are being taken • Less than 5 bars - read- ing is unstable and may be inaccurate • More than 5 bars - read- ing is stable Measurement value/Text Note: The display will hold the last value measured, until a new measurement is made.

  • Page 10: Setting Up The Gauge

    5 SETTING UP THE GAUGE 5.1 TRANSDUCER - ZEROING Setting the zero point for the transducer is important for the same reason that setting the zero on a mechanical micrometer is important. If the zero point of the transducer is not set correctly, all of the measurements the gauge makes will be in error by some fixed number.
  • Page 11 ”Editing the User-defined Sound-velocity Values” on page 10. To calibrate your CG20 gauge for the material you are measuring, you select the material from a list of materials stored in the gauge. For each material stored in the list there is a corresponding sound-velocity value.
  • Page 12 0.179 IrOn Plexiglass 2692 0.106 2388 0.094 Polystyrene 2337 0.092 PLSt Polyurethane 1778 0.070 PLur User-defined sound-velocity 1 uSr1 User-defined sound-velocity 2 uSr2 5.2.1 Selecting a material and sound-velocity (CG20 only) Repeatedly press until the material/sound-velocity you require is displayed.

  • Page 13: Taking Readings

    5.2.2 Editing the User-defined Sound-velocity Values To calibrate your gauge for the material you are measuring, use ElcoMaster™ 2.0 software to change the stored material velocities. Connect the gauge to your PC and the software, then follow the on screen instructions to change the calibration values.
  • Page 14 6.2 PROCEDURE 1. Apply couplant For the gauge to work correctly there must be no air gap between the transducer and the surface of the material to be measured. This is achieved using a couplant. Before the transducer is placed on the surface, put a small amount of couplant on the surface of the material.

  • Page 15: Storage

    The gauge does not contain any user-serviceable components. In the unlikely event of a fault, the gauge should be returned to your local Elcometer NDT supplier or directly to Elcometer NDT. The warranty will be invalidated if the instrument has been opened.

  • Page 16: Technical Specification

    1250 m/s to 10000 m/s (0.0492 in/µs to 0.3937 in/µs) Velocity Selection Options CG10 - One user programmable velocity CG20 - Two user-programmable velocities 8 pre-calibrated velocities (aluminium, cast iron, plexiglass, polystyrene, polyurethane, PVC, stainless steel and steel) Weight (including batteries)

  • Page 17: Warranty

    Additionally, Elcometer NDT warrants transducers and accessories against such defects for a period of 90 days from receipt by the end user. If Elcometer NDT receives notice of such defects during the warranty period, Elcometer NDT will either, at its option, repair or replace products that prove to be defective. The warranty will be invalidated if the instrument has been opened.
  • Page 18 10.2 OBTAINING SERVICE DURING WARRANTY PERIOD If your hardware should fail during the warranty period, contact Elcometer NDT and arrange for servicing of the product. Retain proof of purchase in order to obtain warranty service. For products that require servicing, Elcometer NDT may use one of the following methods: •...

  • Page 19: Spares & Accessories

    11 SPARES & ACCESSORIES 11.1 TRANSDUCERS Elcometer NDT gauges are not supplied with a transducer as standard - this must be ordered separately. The transducers listed below are the most commonly used however, Elcometer NDT offer a wide range of other transducers to suit various applications.
  • Page 20 T = Titanium Block. 11.3 ULTRASONIC COUPLANT Each gauge is supplied with a 120ml (4oz) bottle of standard ultrasonic couplant. Replacement bottles and couplant for high temperature applications are available from your local Elcometer NDT supplier or directly from Elcometer NDT. Description Sales Part No.

  • Page 21: Condition And Preparation Of Surfaces

    12 CONDITION AND PREPARATION OF SURFACES Further information can be found on the Elcometer NDT Knowledge Centre on www.elcometerndt.com. 13 APPLICATION NOTES Further information can be found on the Elcometer NDT Knowledge Centre on www.elcometerndt.com.

  • Page 22: Sound Velocities Of Common Materials

    14 SOUND VELOCITIES OF COMMON MATERIALS Sound velocity Sound velocity Material Material (m/s) (in/µs) (m/s) (in/µs) Aluminium 6350 0.250 Paraffin 2210 0.087 Bismuth 2184 0.086 Platinum 3962 0.156 Brass 4394 0.173 Plexiglas 2692 0.106 Cadmium 2769 0.109 Polystyrene 2337 0.092 Cast Iron 4572 0.180 (Approx.)

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Cg10

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