PREPARED INKS Flash point

(°C min) (PMCC)

Viscosity @ 21°C

(cS)

Specific gravity

Particle size (µm)

Magnaglo 410HF * A prepared ink consisting of Magnaglo MG410 in a high flash kerosene of low odour

93

3.45

0.81

7 to 25

Magnaglo 14HF * A prepared ink consisting of Magnaglo 14A in a high flash kerosene of low odour

93

3.45

0.81

2 to 25

Magnavis 7HF * A prepared ink consisting of Magnaflux 7C in a high flash kerosene of low odour

93

3.45

0.81

0.6 to 2.5

*Available in both aerosol and bulk format

DRY POWDERS 1 Grey Maximum working temperature 315°C

Magnaflux dry powders offer a range of colour to give good contrast on as wide a variety of finishes as possible. In the event of contrast not being ideal for inspection, a thin layer of Magnaflux WCP-2 White Contrast Paint can be applied prior to testing. All powders are of closely controlled particle sand shape and have desirable magnetic properties. For best results application should be as a cloud applied near the surface while the current is flowing. Excess powder settling out can be blown off.

3A Black Maximum working temperature 230°C 8A Red Maximum working temperature 175°C

WCP-2 White Contrast Paint

Magnaflux WCP-2 is a quickcontrast paint which can be applied as a thin coating prior to testing where enhanced contrast is required.

SPECIFICATIONS Magnaflux, Magnaglo and Magnavis concentrates, prepared inks and dry powders meet the requirements of ASTM E-1444 with oil suspended inks and concentrates meeting AMS specifications, plus appropriate industrial and Government specifications, Certifications are available on request.

HANDBOOK FOR

MAGNAFLUX

L10 COIL

PART NUMBER:

Particle size (µm)

Settlement volume (%V/V) (as supplied)

7 to 25

0.12

2 to 25

0.25

0.6 to 2.5

2.5

Magnaflux dry powders offer a range of colour to give good contrast on as wide a variety of finishes as possible. In the event of contrast not being ideal for inspection, a thin layer of

2 White Contrast Paint can be

All powders are of closely controlled particle size and shape and have desirable magnetic properties. For best results application should be as a cloud applied near the surface while the current is flowing. Excess powder settling out can

2 is a quick-drying white contrast paint which can be applied as a thin coating prior to testing where enhanced contrast

Magnaflux, Magnaglo and Magnavis concentrates, prepared inks and dry powders meet the meeting AMS specifications,

are available on request.

Handbook for Magnaflux L10 Coil

HANDBOOK FOR

MAGNAFLUX

L10 COIL

RT NUMBER: 008C020

Certificate of Conformity

Certified that the above item conforms to and meets the requirements of the following: EC Directives 73/23/EEC 89/392/EEC 91/368/EEC 89/336/EEC (Emissions) 92/31/EEC (Emissions) Certificate is issued under the auspices of the Equipment Product Manager (2011): . Magnaflux (A Division of ITW Ltd), Faraday Road, South Dorcan Industrial Estate, Swindon, Wiltshire, SN3 5HE, UK. Tel: +44 (0)1793 524566 Fax: +44 (0)1793 490459 Email: sales@magnaflux.co.uk www.magnaflux.com

L10 Coil Serial number:

DEMAGNETISATION � To demagnetise a small part, turn the coil ‘ON’ and insert the part into the coil close to

the inner wall. Withdraw the part from the coil approximately 60 cm (2 feet) before turning the coil ‘OFF’. As with magnetisation, the long axis of the part should be essentially parallel to the axis of the coil.

� To demagnetise larger parts, it may be more convenient to move the coil over the part. In such cases, the coil can be turned ‘ON’ and move to the far end of the part and then withdrawn. Again, the coil should not be turned ‘OFF’ until it is approximately 60 cm (2 feet) away from the part.

� Effectiveness of demagnetisation can be checked by the use of the Magnaflux pocket field indicator – part number 008M001 – or the Magnaflux calibrated field indicator – part number 008M002

PARTS LIST Item Quantity Part Number Drawing

Number Description

1 1 19618 A2 L10 Coil Sub-assembly 2 1 015S032 Footswitch, Single Pole, N/O (Herga) 3 4 5 2 014B027 20 mm Gland 6 7 12 m 001C065 3-Core Cable, 1.5 mm2, Black 8 1 075C005 Label 9 1 19617 A3 Switch Box Cover

DESCRIPTION The L10 Coil is a portable general purpose AC Coil providing a means of creating magnetic fields for the detection of surface cracks. Application of magnetic particles is optional by either the dry powder or the wet method. The L10 Coil consists of an epoxy resin encapsulated coil equipped with a footswitch, and is provided with ten metres of flexible line cable. It will accept parts up to 250 mm (10 inches) overall diameter. The L10 Coil is constructed for use on 110-120 volts 50 Hz alternating line current only in normal use. A 12 volt battery or generator may be used. A 6 volt battery, resulting in reduced field strength, may also be used. The Coil will draw approximately 13 amps when operating from a 110 volt line, energised and with no metal in its field. SAFETY In the interests of operator safety, the following points should be noted: � Read the instructions provided for the chemicals to be used thoroughly, and observe

any given warnings � Ensure that the equipment has a good ‘earth’ connection before the first operation � Never use the L10 Coil with a cracked/split epoxy green coating � Always unplug the L10 Coil when not in use � Always use a good proprietary barrier cream on the hands to minimise skin irritation.

The wearing of gloves is not recommended. � If the L10 Coil is protected by an earth leakage circuit breaker, check its operation by

pressing the test button

TECHNICAL Weight (coil only) 8.5 Kg Weight 10.5 Kg Dimensions 26 cm (internal diameter)

37 cm (outside diameter) 7 cm thick

Power source 110 volts, 1 Ph, 50 Hz 12 volts DC Line current Ca 13 amps Ca 7 amps Ampere -turns Ca 3,000 (empty) Ca 1,670 (empty) DUTY CYCLE Continuous service WILL overheat and possibly damag e the Coil. To avoid such an occurrence, a duty cycle NOT in excess of 15 second s ‘ON’ and 15 seconds ‘OFF’ should be adhered to. OPERATION Parts to be inspected should be dry and free of grease, oil and dirt. Connect the line cord into any convenient source of 110-120 volts, 50 Hz alternating current. The coil is energised by depressing the foot switch. Releasing the foot switch will de-energise the coil. To check the operation of the coil, energise it and position a lightly held screwdriver or ferromagnetic rod inside the Coil close to the inner wall. A very pronounced pull should be evident as the screwdriver/rod is moved in and out of the coil.

INSPECTION PROCEDURE � Position the part to be tested within the Coil aperture making sure it is close to the

inner wall. The long axis of the part should be essentially parallel to the coil axis. Note – if you have a length/diameter ratio of < 5, it may be necessary to use extenders to increase the part length.

� Turn the Coil ‘ON’ (using the footswitch) and apply the inspection medium. Dry powder can be applied from a powder dispenser or larger electrically driven powder blower. For proper application using the powder dispenser, the perforated head of the dispenser should be inclined at a slightly downward angle. A shaking action (similar to applying salt) in combination with a slight squeeze is required to direct the powder to the area of interest on the part.

� Inspections are best accomplished as the powder is being applied, since indications of cracks (or other magnetic discontinuities) will form immediately. Small parts can be manipulated within the coil with one hand while powder is being applied with the other hand. If inspection is to be carried out after the part h as been removed from the Coil, the Coil should be de-energised prior to removal of the part to prevent demagnetisation.

� Wet method procedures are similar. In general, particles suspended in a liquid can be applied more easily to the entire surface area of a part. It should be noted that aerosol type dispensers must be shaken to get the magnetic particles into suspension just prior to application. With the part properly positioned within the Coil, the Coil is turned ‘ON’ and the inspection medium is applied to the surface of the part. Application of the inspection medium is terminated and, after a delay of approximately 1-2 seconds, the coil is turned ‘OFF’. The part can then be removed from the coil and inspected.

Even though there is a formula to calculate the current to achieve the required field strength for crack detection, it is advisable with this portable L10 Coil to check this by the use of magnetic flux indicator strips – Magnaflux part number 008M004 (general engineering) or part number 008M005 (aerospace).