MI 3102(H) BT
Eurotest
XE
Measurements
38
Diagnostic tests procedure
Select the
DIAG. TEST
function from the
OTHERS menu
.
Set the nominal test voltage.
Connect
test cable to the instrument and to the item to be tested (see
).
Different test cable must be used for testing with nominal test voltage U
N
≤ 1000 V and
U
N
= 2500 V. Also different test terminals are used.
The standard three-wire test lead, schuko test cable or plug / tip commanders can be
used for the diagnostic test with nominal test voltages ≤ 1000 V. For the 2500 V
diagnostic test the two wire 2.5 kV test lead should be used.
Press the
TEST
key to start the measurement. Internal timer begins to increment. When
internal timer reaches 1 min R60 and DAR factor are displayed and short beep is
generated.
When internal timer reaches 10 min also PI factor is displayed and measurement is
completed. (Measurement can be interrupted any time by pressing the
TEST
key again.)
After the measurement is finished wait until tested item is fully discharged.
Store
the result by pressing the
MEM
key (optional).
Figure 5.10: Example of PI and DAR diagnostic test results
Displayed results:
R
.............. insulation resistance
U
.............. test voltage (actual value)
R60
........... resistance after 60 seconds
DAR
......... dielectric absorption ratio
PI
.............. polarization index
Notes:
Diagnostic tests are available only for nominal test voltages 500 V, 1000 V and 2500V.
If any insulation resistance values (
R
ISO
(15s)
or
R
ISO
(1min))
are over-ranged the DAR
factor is not calculated. The result field is blank: DAR : _ _ _!
If any insulation resistance values (
R
ISO
(1min)
or
R
ISO
(10min))
are over-ranged the PI
factor is not calculated. The result field is blank: PI :_ _ _!
