Measure motor winding resistance and other low resistances
Perform precise tests of objects of resistive and inductive nature
using one instrument - small resistance meter Sonel MMR-620.
We present a versatile small resistance meter that provides very
high measurement accuracy. The measurement resolution is 0.1 µΩ.
The MMR-630 model enables measurements of objects of resistive as
well as inductive nature, such as transformers and motors. This
is due to the large measurement current for the individual subranges
and the corresponding operating modes. When testing objects
of a resistive nature, rapid measurement (3 seconds) is applicable.
When testing inductive objects, extended measurement is used
(there is also the possibility of a shortened mode with a slightly
lower measurement accuracy).
Product features
MMR-620 microohmmeter enables accurate measurements of both
connections resistance (welded, soldered, bolted) and winding
resistance of electrical motors.
Measurements of objects resistive in
nature:
welded and soldered connections,
equipotential bondings, earthing conductors,
contacts, welds of rails, conductors and
cables,
measurement according to the four-lead
method.
Measurements of objects inductive in
nature:
motor windings,
low-resistance coils.
Additional functions
Automatic or manual selection of measuring
range (measurement of objects of an inductive
nature).
Selection of measurement mode according to
the type of measured object:
fast measurement (3 seconds) for measurement
of objects of a resistive nature,
extended measurement for testing of objects
of an inductive nature (accelerated mode, with slightly
worse accuracy, available);
with automatic discharging of the object after
measurement.
Selection of measurement mode depending on
application (including control of product series):
measurement in normal mode - triggered
when the “START” button is pressed,
measurement in automatic mode - the
instrument awaits connection of all four test leads to the
object, after which
it automatically start measurement in one or both directions
and calculates the mean resistance value,
measurement in continuous mode - the
meter repeats successive measurement cycles with breaks
every 3 seconds
(for objects of a resistive nature) or performs measurement
continuously (for objects of an inductive nature)
Window mode:
makes possible to set an upper and lower
limit within the measurement result should remain;
sound signal triggered when the result is beyond set
range,
capability of performing measurements even
under disturbances of a value five
times greater than the measured signal.
