Amprobe GP-2 Geo-Test Uživatelský manuál stáhnout pdf (Strana 12)

GP-2 GeoTest

EN - 12

4.2. EARTH 3 WIRES

The measurement is taken according to what is prescribed for CEI 64.8, IEC 781, VDE

0413, EN61557-5 standards.

CAT III

440 V P-N-PE

250 V

ESES

Figure 3: 3 wires earth resistance measurement

Measuring procedure:

F Insert the 4 connectors (black, red, blue and green) of the cables into the

corresponding input terminals of the instrument (E, S, H, ES).

F Connect the alligator clips as shown in Figure 3.

F Position the switch to EARTH 3 WIRES.

Display appearance:

------

0 0 V - - -- - -

Press GO to take the measurement and read the value on the display. At the

end of the test, a screen similar to the one below will be displayed.

NOTE! If you keep pressing GO, the instrument takes more measurements

consecutively. When a new value is displayed, the symbol Ω blinks on the main

display, the instrument emits a short sound and the counter shown on the

Main display

Secondary display on the left-

hand side:

In this mode it displays the

eventual interfering voltage

present on the circuit

Secondary display on the

right-hand side

Small earth plant:

- current probe (terminal H, blue

wire) positioned a distance from

the earth equipment outline

corresponding to five times the

diagonal of the area of the earth

equipment.

Large earth plant:

- current probe (terminal H, blue

wire) positioned a distance from

the earth equipment outline

corresponding the diagonal of

the area of the earth equipment.

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 40 41

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