Ecom Ex-DT 12 Operating Instructions Manual page 10

7. 4 Testing / calculating resistances
To test or measure resistances, the test sensors of the
Ex-DT must be held on the object being tested. The
short circuit signal can be conside-red a reference
signal.
The greater the resistance to be measured, the further
the frequency of the measuring signal drops below the
reference signal.
For ranges, see Item 6 – Technical Data.
7. 5 Testing / calculating capacitance
Capacitors can be tested for correct functioning when
idle (discharged). A distinction must be drawn here
between film (unpolarized), electrolyte (polarized) and
tantalum capacitors (polarised).
The testing range for capacitors is upwards from 0.5µF
(see Item 6 – Technical Data).
When charging-up the capacitor during the test, you
will hear a sloping signal, which gradually dies out. The
greater the capacitor's capacitance, the longer the fall
time of the signal.
If while the capacitor is being tested, a continuous
signal similar to the short-circuit signal sounds, the
capacitor is faulty (internal short circuit).
If no signal sounds while a capacitor is being tested,
either the capacitance is below the practical test range
or an internal interruption has occurred.
Please respect the max. connection value of a capaci-
tor in the ex-area!
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