⑶Earth Voltage Measurement
Set the range switch to EARTH VOLTAGE position and make sure that
the indicated value is 10V or less.
If the earth voltage is higher, it may result in excessive errors in earth
resistance measurement.
At this point, one can break the power supply of tested earth electrode
equipment to lower earth voltage and then measure the value.
⑷Checking of Auxiliary Earth Spikes Connection
(Check Function of Auxiliary Earth Resistance)
Set the range switch to 2000Ωposition and press the “TEST”button. If
the auxiliary earth resistance is too high, the “. . .”blinks.
Reduce the resistance by rechecking the connection, changing the site to
stick earth spikes, or pouring water over the spikes.
⑸Measurement (Precise Measurement)
Set the range switch to the desired position, press the “TEST”button.
First please press “TEST”beginning from 2000Ω.If the show value is
too small, switch to 200Ω or 20Ω and the show value here is namely the
tested earth resistance value.
Note: Make sure connecting wires separated during wire connecting
since testing when testing leads wind about with each other may
encounter mutual inductance to affect reading. The assistant earth
resistance value may be too big and error may occur be too big and error
may occur to show value. Make sure assistant earth bar P(S) and C(H)
into wet land and complete contact of connecting parts.
⑹Measurement (Simplified measurement)
When auxiliary earth spikes can not be stuck, an approximate earth
resistance can be obtained by two-wire system designed to make
measurement using an existing earth electrode.
Make sure to use the specified simplified measurement probe.
①Connecting testing wires.
Please connect simple testing wires according as shown below.
