Dehn EP4 Bedienungsanleitung Seite 20

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4.4 Measuring
After the device has been connected to the reference earth electrode (see 4.2)
and zero balancing has been performed (see 4.3), the equipment is
operational.
Standard or automatic measurements with or without change of polarity can
be performed. The direction of the current flow is displayed by + or -. The
displayed algebraic sign refers to the test prod of the device.
⇒ Remove corrosion or paint from the measuring point, if required.
⇒ Press the
button to switch on the device (operational if +1 is
displayed and green LED lights up).)
⇒ Messspitze möglichst senkrecht mit sicherem Kontakt aufsetzen
If the red LED flashes and an acoustic signal sounds, external voltage
is present!
The measurement must be aborted at this measuring point (see external voltage
4.5).
Short warning signals caused by inductive voltages or static charges do not
interfere with the measurement.
4.5 Standard measurement
Press the button until a constant measured value is displayed.
In case of measured values of less than 10 Ω, the EP4 continuity tester
automatically changes to the Lo Ω mode and continues measuring with a
measuring current of 200 mA.
The "Lo Ω" symbol is displayed and the right LED indicates a measuring
current of 200 mA. If the measured value is outside the measuring range (>
1999 kΩ), the "OL" (overflow) symbol appears.
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