Hioki Super megohm SM7110 - Names and Functions of Parts

12
Operating Precautions
Before connecting the measurement leads or electrode to an object to be
measured
WARNING
Between either of the following terminals, a maximum voltage of 1000 V may be
generated depending on the measurement voltage settings.
• Between the OUTPUT terminal and the INPUT terminal
• Between the OUTPUT terminal and the GUARD terminal
To avoid danger, be sure to turn o󰀨 the instrument before connecting the
measured object to the measurement terminal.
If the GUARD terminal and the GROUND terminal are connected with each other,
be aware that high voltage is also generated between the OUTPUT terminal and
the ground.
Before grounding the instrument
WARNING
• During measurements of an object grounded by one wire, if the OUTPUT
terminal and the GROUND terminal are connected with each other, a maximum
voltage of 2000 V to the earth is applied on the GUARD terminal, INPUT
terminal, and an external electrode (the shielding side of measurement lead),
according to the measurement voltage settings. Take precautions to avoid an
electric shock.
• If the GUARD terminal and the GROUND terminal are connected with each other,
a maximum voltage of 2000 V is applied between the OUTPUT terminal and the
ground (the GROUND terminal is grounded), according to the measurement
voltage settings. Take precautions to avoid an electric shock.
Before performing a measurement
WARNING
• While measuring insulation resistance, and when pressing the START key,
dangerous voltage is applied to the measurement terminals. To avoid electric
shock, do not touch the measurement leads.
• Even after the STOP key is pressed, the measurement voltage may remain in
the measured object. Because there is a risk of an electric shock, take care
to not touch metallic parts to which the voltage is applied until they are fully
discharged.
• The set voltage is applied to the measured object. Take precautions to avoid an
electric shock.