Ecom Ex-DT 12 Operating Instructions Manual page 11

7. 6 Testing / calculating inductance
Besides the active internal resistance of an induc-
tance, the inductance itself is also measured. As
inductance increases, the frequency of the measured
tone drops below that of the reference tone.
Please respect the max. connection value of an
inductance in the ex-area!
7. 7 Testing / measuring diodes
Ensure correct polarity when performing the diode
test!
If the red test probe (positive terminal) is connected to
the anode and the black test probe (negative terminal)
is connected to the cathode, the diode is tested in
the continuity direction. In this case, the pitch must
approximate that of the short circuit signal.
If the same test is now performed in the no continuity
direction and no signal is heard, the diode is in sound
working order.
7. 8 Measurements on non-intrinsically
safe circuits
Please note the following:
After being used on non-intrinsically safe electrical
circuits, the continuity tester must be subjected to a
function test (see Item 7. – Getting started) and a
dwell time of 5 minutes must pass before the continui-
ty tester can be used in potentially explosive areas.
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