English
Tester MS021
4
INTRODUCTION
Thank you for choosing the product by
ТМ
MSG Equipment.
The present user manual consists of the information on the application, supply slip, design,
specifications and rules of usage of tester MS021.
Prior to using the tester MS021 (hereinafter, “the tester”), study the present user manual
thoroughly. If required, get the special training at tester manufacturer facilities.
Testing rectifiers with the use of multimeter has always been the most common practice. This
method has a significant drawback -it doesn't help to identify the diode type and find the faulty
one. A standard multimeter test with a direct current of about 0.002A, which is too low compared
to the diode operating currents.
The tester checks the diode with an alternating current of 0.9A,
which allows you to reliably assess the technical condition of the diode bridge of the generator
or the diode separately.
1. PURPOSE
The tester MS021 is used during the alternator repair for the diagnostics of diode bridges, and it
can detect:
•
diode breakdown;
•
diode cut;
•
diode type (common diode, avalanche diode);
•
diode degradation (extreme drop of forward voltage);
•
avalanche diode reverse breakdown voltage;
•
bad diode connection with the bus bar.