MIC-05s1
– USER MANUAL
29
Quick start, without 5 seconds delay, can be done by
pressing the
ENTER
button and holding down the
START
button. The measurement will be stopped
when the programmed time is reached or the
ESC
button pressed.
After the measurement is com-
pleted the result is displayed.
Use
F4
,
F5
buttons to switch between con-
secutive measurements for a given sequence from 1 to 5.
Press
F1
to display a chart of the measured resistance
and current as a function of time.
Note:
- Other comments and displayed symbols are the same as for standard R
ISO
measurement.
- In the increasing voltage measurement mode it is also possible to perform the measurement with the
AutoISO-5000 adapter. The display results are similar to the measurement of R
ISO
with AutoISO-5000.
The screen will show the following:
3.2.5 Dielectric Discharge Indicator - DD
In the dielectric discharge test the discharge current is measured after 60 seconds from the end
of measurement when charging of the insulation is complete. The DD is a value characterising the in-
sulation quality independent from the test voltage.
The measurement operates in the following way: first the insulation is charged for a set period. If
the resulting charged voltage is not equal to the set voltage after 20 seconds the object is considered
as not fully charged and the meter abandons the measurement procedure. After the charging and po-
larisation is complete the only current flowing through the insulation is the leakage current. Then the
insulation is discharged and the total dielectric discharge current starts to flow through the insulation.
Initially this current is the sum of the capacitance discharge current - which fades quickly - and the
absorption current. The leakage current is negligible because there is no test voltage.
