ShenPaz Focus 4010 Manual De Instrucciones página 9

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2.6 Sound Messages :
The tone sound is a useful indicator for key selection and operation procedures.
 A single tone sounds, when a key is pressed or when the furnace is in the "HOLD"
mode.
 A double tone sounds when there is an incorrect key selection or choice of data.
 A five double-tone sounds at the end of a firing cycle.
FOCUS 4010/HT Dental Porcelain Furnace Page 9 Manual version 20.08.2015