Null Setting (Protective Conductor Resistance Function) - KYORITSU KEW6201A Instuction Manual

• When the voltage of main power supply is 265V or more, "HI-V" is
displayed on the LCD.
• In that case, disconnect the mains cord of the instrument from main
power supply.
5.2.3 Null setting
A criteria of judgment for Earth Continuity is 1Ω, and it is low value.
So even the resistance of Test Leads will affect the measurement result.
This instrument, M-6201A, can cancel the resistance of Test lead by
pressing Null|250V/500V
shown below.
The Null function is not released even if power off the instrument,
therefore, there's no need to do Null setting at every measurement.
However, when replacing fuses or test leads, it is recommended to do
Null setting again.
Procedure:
⑴ Set the function switch to Class I Test function.
⑵ Connect the mains supply and the instrument with M7123 mains cord.
M-7129A
Fig. 9
⑶ Insert Test Lead with safety alligator clip (M-7129A) in to the E terminal
of the instrument, and contact the tip of the Test Lead with the metal
parts of the socket on the instrument.
# WARNING
switch. The procedure of Null setting is
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