KYORITSU 6017 - Manual (Page 22)

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Make sure to drive the auxiliary earth spikes in the moist part of the earth. Give
enough water if the auxiliary earth spikes have to be stuck into dry, stony or
sandy part of the earth so that it may become moist.
If it is not possible to drive the auxiliary earth spikes into a hard surface, such
as concrete ground, lay the earth spikes there, cover them with a cloth and put
water (preferably salt water).
The "OK" lamp lights up when test lead connection to terminals is good and
earth resistance at the auxiliary earth spikes is within a limit of tolerance. If it
does not illuminate, check the leads for bad connection or lower the auxiliary
earth resistance to a proper level. When the instrument is ready to make
accurate measurement, the lamp lights up.
3. Check Earth Voltage.
Select the "earth voltage 60V AC" range and check whether the reading is 10V
or less. When earth voltage is more than 10V, it may result in errors in the
reading. To avoid this, reduce the earth voltage, for example, by disconnecting
mains from the equipment connected to the earth electrode under test.
4. Select the desired precision earth resistance range and press the test button.
Multiply the reading by 10 on the x10 range or 100 on the x100 range.
Note:
If test lead connection is bad or lost, the meter goes offscale at a press of the
test button. This is not a failure of the instrument. Make correct connection and
the instrument will operate properly.
5. Set the range selector switch to the OFF position.
Green
Yellow
Red
Earth Electrode under test
Auxiliary Earth Spikes