The following guidelines for how to evaluate emitter wear apply to hafnium-emitter electrodes:
■
The face of a new electrode looks shiny and smooth.
1 Electrode pit
2 Hafnium emitter
3 Electrode face
■
If the electrode pit diameter extends beyond the hafnium, as shown, replace the electrode and nozzle.
■
If you see a non-symmetrical, rough-edged pit and rough-surfaced electrode face, replace the
electrode and nozzle. Always replace the nozzle at the same time as the electrode.
Maintenance
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811530 Instruction Manual XPR460
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