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KYORITSU 4106 User Manual

Page 33

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Note) If a message “

” or “

” appear on the LCD,

auxiliary earth resistance is too high to make measurements.

Recheck the connection of Test Leads.

9-1-3 Simplified Measurement (2-Wire) *with Simplified Test Probes MODEL 7238

#

DANGER

● Use a Voltage detector to check the earth of the commercial power

supply.

● Do not use the instrument to check the earth of the commercial power

supply. A danger will be caused because the voltage may not be
displayed when in case of a live conductor when the connection of the
earth electrode to be measured has come off, or when the connection
of the test leads of the instrument is not correct etc.

● Do not use this instrument to measure the voltage of commercial

Power supply. This instrument is not designed to measure voltages of
commercial power supply.

● When using the supplied Simplified Test Probes, the “S(P)” and

“H(C)” Terminals will be short-circuited and the input impedance will

be reduced. The residual current circuit breaker may operate when
making measurements of the voltage in the circuit with the breaker.

● ELCBs may trip when performing simplified measurements on the outlet

of the circuit with ELCBs since this instrument has large test currents.

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-Wire method.
However, the measured earth resistances contain the auxiliary earth
resistance and the resistance of the “E” Test Lead.

This instrument is supplied with a set of Simplified Measurement Test Leads
for which both of Alligator Clips and Flat Test Bar can be replaced and used
if necessary.

Terminals to be used : E, S(P), H(C) Terminals
Test Leads

: one to the “E” Terminal, Simplified Measurement

Probes to the “S” and “H” Terminals and short-
circuit these Terminals.

Auxiliary Earth Spike : None is used