Instrument Controls
www.megger.com
DLRO2 and DLRO2X
18
First measurement is complete. The Difference Meter is now
active. The first measurement is shown as a green ring at the
centre of the scale with +0% below.
A second measurement is made, the Difference Meter shows
result relative to reference measurement (+30% in this case)
showing an increase. Shown as a blue ring
NOTE :
For each successful measurement the needle leaves
a blue marker on the Difference Meter (a red marker if the
reading contains no
ise).
Third measurement is made, the Difference Meter shows it’s
result relative to the first (>+1000% in this case) showing an
increase.
The 1000% difference shows clearly that something isn’t
right. Check the leads, connections, unit under test, etc.
NOTE :
The units on the main display have changed from µΩ
to mΩ and are now indicated in blue to highlight the change.
Fourth measurement is made, the Difference Meter shows
it’s result, again relative to the first measurement.
The new reading is -1% showing a possible return to
the expected result.
NOTE :
The units on the main display have changed back
to µΩ and are shown in blue indicating another change.
Fifth measurement is made, the Difference Meter shows it’s
result, relative to the reference measurement. This reading is
now just -1% lower than the reference measurement.
NOTE : N
The units remained unchanged as µΩ and are
shown in black.
