Step By Step Instructions - MEGABRAS MD-5060x Guia Del Usuario

Step by step instructions

1. Check if there is no differences of potential voltage between the points where
the megohmmeter shall will be connected to, nor between them and the
ground.
2. Connect the red security terminal (red cable) to the megohmmeter (-V) output
terminal. (see figure 1)
3. Connect BNC terminal to the ZERO REFERENCE (+R) terminal and the ter-
minals to the element to be measured as indicated in the figure below.
4. The G (GUARD) terminal can be used or not, according to the measurement
that is going to be carried out.
be electrically referred to earth in order prevent the equipment from being on a high potential, which
may produce unstable readings. When insulation is measured regarding grounding, the R terminal is
connected to earth and the condition by means of which the equipment potential setting is fulfilled. If
the measurement is performed between two parts, which are not grounded (for example, between
two phase conductors in a tree-phase cable), the megohmmeter GUARD terminal must be grounded.
This implies that whenever a measurement is performed, one of the GUARD or R terminals
must be grounded, but not both of them simultaneously. MEGABRAS Application Note 32 ex-
plains the usage of Guard terminal for minimizing the parasite resistance effect, whose influence one
intends to minimize.
ELEMENT TO BE MEASURED
BLACK
CLIP
BLACK BNC
CONECTOR
IMPORTANT: During measurements, the megohmmeter must
RED CLIP
RED PIN
18
The terminals in the picture
are merely illustrative, so
there can be differences
between them and the
ones which really come
with the equipment.