Operating Manual Isotest 3P
Page 13
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 buttom.
The test item must be earthed
.
Options:
a conductive connection with earth potential (e.g. the
earthed parts of a building)
an earthing connection by means of an earthing rod
Alternative methods of earthing and possible faults are described in detail in the
Checklist under point C.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.
2.5 Reminder to Switch Off
The reminder to switch off is activated if the unit is not switched off at the main switch
on the unit within 5 minutes of the last operation of the safety button. The buzzer is
sounded for 5 seconds and the unit switches into power-saving mode. It can only be
used again by turning the main switch off and on again.
2.6 Alarm Signals
The alarm signal is given if:
the safety buttom (see 1.4) is pressed harder than usual than normal (convulsive
movement).
