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In case of concrete, lay the Auxiliary Earth Spike down and water it, or put a wet cloth etc. on the spike when
making measurements.
The measurement result may be incorrect if interference voltage is higher than 5v, and the noise mark
“ ”displays.
When message
or
or
is displayed, it means bad connection of the Test Leads, or warnings for failure
of correct measurement due to high value of earth resistance compared with auxiliary earth resistance.
Danger
The measurement cannot be made when a warning message
appears on the Main Screen. Voltages more
than 20V exist between the instrument terminals.
Simplified measurement (2-pole)
Use this method when the Auxiliary Earth Spike cannot be stuck.
In this method, an existing Earth Electrode with a low earth resistance, such as a metal water pipe, a common earth
of a commercial power supply and an earth terminal of a building, can be used with the 2-Pole method.
Terminals to be used: E and H Terminals
Test Leads: E and H Terminals respectively
Auxiliary Earth Spike: None is used
（
1
）
Press
key to select measurement method: 2-Pole (the Main Screen displays 2POLE 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 2 test leads (black and blue) to the corresponding terminals E and H on the
instrument respectively;
②
Engage 2 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 11)
The E and H terminals are connected to earthed equipment under test and auxiliary earth equipment respectively.
