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Operating Manual Isotest II T / II RT
2
Acoustic Signals during the Test Procedure
During examination of the test object, the Isotest tester indicates pores and imper-
missible operating statuses by means of acoustic signals.
2.1
Flaw (Pore)
A flaw (pore) detected during scanning of the test object with the test electrode is
signalled by a buzzer sounding. A flaw can also be clearly recognised optically by
the bundling of the high voltage sparks.
The duration for which the buzzer sounds depends on the size of the flaw and the
test speed.
2.2
Exhaustive Discharge Protection of the Battery
All Type II T/II RT(-F) testers have a special electronic system which detects when
the battery voltage has dropped below a preset value and indicates this by the buzzer
sounding continuously when the tester is switched on.
The measure prevents a damaging exhaustive discharge of the battery and ensures
a reliable function (see Checklist point 1.2).
2.3
Lack of Earth Connection
!
This section must be read particularly carefully as the safe
!
operation and reliable function of the tester are dependent
on correct earthing!
The safest and most reliable method of earthing is a direct conductive connection
from the metal sheath of the test object to the earth connection of the Isotest tester.
Wherever possible, direct earthing should always be preferred to all other methods of
earthing.
