Operating Manual Isotest II T / II RT
Page 9
With this method of earthing, first connect the plug of the earthing cable supplied
(15 m) to the earthing socket of the tester. In order to prevent unintentional removal
of the plug, hook the trigger snap attached to the earthing cable to the metal loop on
the leather carrying case.
!
In order to minimise the possibility of errors when earthing,
!
the lack of an earthing plug in the earthing socket will be
signalled by the buzzer sounding continuously.
The earthing clip on the other end of the cable is now attached to a conducting part
of the test specimen. Ensure that the point to which the earthing clip is fastened is
metallically bare in order to ensure a reliable connection.
!
A poor of lack of earthing connection can result not only
!
in incorrect measurements but also spark-overs at the
safety switch.
Alternative methods of earthing and possible faults are described in detail in the
Checklist under point 3.1.
2.4
Load Exerted by the Test Specimen
The wide range of possible applications of the ELMED insulation tester can necessi-
tate an adaptation of the display sensitivity to the different loads (see 1.3.2).
Factors for the load area e.g.:
•
Type and coat thickness of the insulation
•
Different test electrodes
•
Size of the test specimen, or
•
Moisture.
If an adaptation to the test sensitivity cannot be achieved as described under 1.3.2
(continuous sounding of the buzzer without pore), the load should be reduced by
using a different electrode or drying the test object.
