English
Tester MS021
8
5.1. Safety regulations
1. 0nly the personnel that has received special training in safety operation and been authorized
to work with the test benches (devices) of certain types is allowed to use the device.
2. Make sure that measuring clamps do not have insulation damage or bare metal spots. Check
the clamps for any breaks. In case of obvious damage, replace them with the new ones before
launching the device.
5.2. Rectifier testing
Diagnostics of a rectifier should be performed as follows:
1. Turn the tester on. Connect the clamp to the rectifier housing. The following message will appear
on the screen: “CONNECT PROBE TO DIODE”.
2. Touch the contact spot of the tested diode with a probe. The following information will be
displayed:
“Vf” – diode voltage drop (in volts);
"Vr" - stabilizing voltage (in volts). If there are stabilitrons (avalanche diodes) in the rectifier
structure, the "AVALANCHE" message will appear.
WARNING!
Different contaminants and dirt on the tested contacts may lead to measurement
errors.
Fig.4. Taking measurements.
А)
– incorrect; B) – correct