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This is a standard method to measure earth resistances. The measured earth resistances exclude auxiliary earth
resistances but the resistances on the E terminal are contained. Terminals: E
、
S
、
H terminals.
Test leads are connected to the E, S and H terminals respectively.
Auxiliary Earth Spike: 2 pcs, connect to the S , H terminals respectively.
（
1
）
Press
key to select measurement method: 3 Pole (the Main Screen displays 3POLE in the upper part);
（
2
）
Press
key to select measurement frequency (display in auxiliary display part)
（
3
）
Residual resistance of Rk
①
Firmly insert each plug of 3 test leads (black, red, blue) to the corresponding terminals E,S and H on the
instrument respectively.
②
Engage 3 Alligator clips to short-circuit all of them.
③
Save the Rk values with reference to“ the residual resistance on the Test Leads”.
（
4
）
Connection of Auxiliary Earth Spikes and Test Leads(See figure 9)
Stick the Auxiliary Earth Spikes S and H into the ground deeply which should be aligned from the earthed equipment
under test. Connect the black Test Lead to the earthed equipment under test, the red Test Lead to the Auxiliary Earth
Spike S and the blue Test Lead to the Auxiliary Earth Spike H in sequence.
（
5
）
Earth resistance measurement
Press TEST key after connecting the Test Leads;
The Main Screen displays
“- - - -” message;
The measured earth resistances RE value and related information are displayed on the Main Screen when
the measurement is finished;
Press
key to read RH
,
RS, UST
and
RK values.
