VOLTCRAFT ET-02 Bedienungsanleitung Seite 30

- Connect the green alligator clamp with the foundation earthing rod and the red alligator clamp with
the measurement point to be tested (A) or (B).
- Turn the meter on and select the measuring range "EARTH VOLTAGE". This measures whether
there is AC voltage in the earth/ground potential. Warning! The voltage at the "P" and "E" inputs must
never exceed 200 V/AC.
The earth voltage measurement must result in a voltage value of <10 V/AC. If this
value is greater than the value recommended, there may be incorrect measure-
ments for earth/grounding and the measurements are thus worthless. The interfe-
ring voltage source must first be removed before measurements can be made. If
the measured earth voltage is below 10 V, you can continue with the earthing mea-
surements.
- Select a measuring range which has previously been zeroed (preferably 200 or 2000 Ohm).
During measurements, an acoustic beep tone and a flashing lightning bolt symbol
warn of applied test voltage within the measurement leads. Make sure that nobody is
working on the installation(s) being tested and that no one is touching any of its
components. Danger of electric shock.
- Press the "TEST" button (4). The measurement is started and is signalled by a lightning symbol. The
measured value is indicated on the display When the measurement circuit is closed a beep
tone/signal can be heard.
The earthing resistance displayed is an approximate resistance. The low measure-
ment current of only 2mA will not trip an installed circuit breaker (FI) in household
electrical systems (example A).
- If "I. . ." (= overflow) appears on the display, you have exceeded the measuring range or the measur-
ing circuit is highly resistant / at high ohms. Select the next highest measuring range Warning!
Ensure you zero the range.
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