AMETEK/PRESTOLITE POWER 500882-001, Руководство пользователя

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March 1, 2008 5-3
193111-078
MAINTENANCE
Transient Suppressor Testing
1. Heed WARNING in SILICON DIODE TESTING
section.
2. Disconnect one suppressor lead to isolate
suppressor from electrical circuitry.
3. Use a good quality ohmmeter (preferably one
having a mid-scale value of approximately
50 ohms) to measure resistance values.
4. Zero ohmmeter on R x 1 scale.
5. Record indicated resistance across suppressor.
6. Reverse ohmmeter leads on suppressor and
record indicated resistance.
7. Consider suppressor good if the two readings are
similar (within 20%) and of a relatively high value.
Suppressor is bad if resistance readings are
infinitely high or very low.
Capacitor Testing
1. Heed WARNING in Silicon Diode Testing section.
2. Disconnect capacitor and connect leads of
ohmmeter (set to highest scale) to capacitor
terminals.
3. If capacitor is good, pointer will deflect, indicating
capacitor is being charged, followed by a
deflection in the opposite direction indicating
partial discharge.
If there is no deflection, capacitor is “open” and must
be replaced. Also, if meter needle moves and stops
at one value, replace capacitor.
Replacement capacitors must be ordered from
factory. When ordering, supply serial number of
charger and microfarad (MFD) or (µF) value printed
on capacitor.