Hioki 3237 - Chapter 3 Measurement Procedure

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A
DANGER
Observe the following precautions to avoid electric shock.
Always verify the appropriate setting of the measuring function before
connecting the test leads.
Disconnect the test leads from the measurement object before
changing the measuring function.
Clamp sensor/ Clamp-on probe/ Test leads should only be connected
to the secondary side of a breaker, so the breaker can prevent an
accident if a short circuit occurs. Connections should never be made
to the primary side of a breaker, because unrestricted current flow
could cause a serious accident if a short circuit occurs.
Do not measure an input in excess of the maximum rated working
voltage and current, as the resulting heat buildup may damage the
product or cause a short-circuit accident.
The maximum rated voltage to ground of the V
Ω
CLAMP
terminal is 600 VAC/DC (CAT II) or 1000 VAC/DC. (Cannot be used with
CAT II, CAT III and CAT IV. Can be used when not directly connected
to main power sources such as a battery or solar power, and transient
overvoltage is below 2.5 kV.) . Do not apply any voltage to this
terminal exceeding these ratings.
The maximum rated voltage to ground of the COM terminal is 300
VAC/DC (CAT II) or 500 VAC/DC (Cannot be used with CAT II, CAT III
and CAT IV. Can be used when not directly connected to main power
sources such as a battery or solar power, and transient overvoltage is
below 2.5 kV.). Do not apply any voltage to this terminal exceeding
these ratings.
The maximum rated voltage to ground of the A-terminal is 300 VAC/DC
(CAT II) or 500 VAC/DC (Cannot be used with CAT II, CAT III and CAT IV.
Can be used when not directly connected to main power sources such
as a battery or solar power, and transient overvoltage is below 2.5 kV.).
Do not apply any voltage to this terminal exceeding these ratings.
The maximum rated voltage to ground of the SENSE terminal is 300
VAC/DC (CAT II) or 500 VAC/DC (Cannot be used with CAT II, CAT III and
CAT IV. Can be used when not directly connected to main power sources
such as a battery or solar power, and transient overvoltage is below 2.5
kV.). Do not apply any voltage to this terminal exceeding these ratings.
To avoid electrical shock, be careful to avoid shorting live lines with
the test leads.
If the test leads are open-circuited, live high voltage lines cannot be
detected. After connecting the test leads, perform continuity tests to
confirm that the test leads are not open-circuited.
(See "3.4 Continuity Test".)
Chapter 3
Measurement Procedure