User guide

Rev. 12/97 -10- D77X
transducer) with the handle of a screwdriver or similar
blunt instrument.
8. Verify that signal strength increases with frequency of
the tapping. Typical increases will range from 20-30
counts.
9. Verify that signal strength decreases when tapping
ceases.
Bench Test is Complete
PART 2 - PRE-INSTALLATION CHECKOUT