| Ml giitW prole systems are made up g| a mil, entedfcd In lie ll| it the prnbe, a separate drtwer unit and an interconnecting 'tuned' length et cable. me principle M operation, as tie name implies, depends upen tie eld) currents set op In the surlace nt the target material. the coil Is supplied nitri a constant r.l current tram lie remete addj- probe driver, wild sets ip at etedrimgnetlt Held between the tip aid the observed snrlace. Any electrically eonetnetive material within this eleetri-magnetic Held, le. the target material, will have eddy currents indited in It's surlace. The energy ahsnrbed trin the electri-magnelic field li produce these eddy currents will vary tie strengtl nt the lield, and heece the energising current, In propcriiii ili the probe target distance. Such changes are seised in the driver where they are converted to a varying voltage signal. The whole prone, extension calls and drivtr system relies lor It's operalioo in Ming a tuned circuit and as suel is dependant n tie system's natiral frequency. Thus each system is set up lor a fined eleelricil/cahle length. Eddy probe systems are usually supplied with 2,9,9 or 14 mire total caaie lengths. SEPJTURiDH eddy curreil probes late leen designed to ts ttie most rulost available ail are ideally suited U a vast range of industrial applications. |