6．Measurement; Voltage Measurement(Mains Disconnection Check); Insulation Resistance Measurement - KYORITSU 3021A Instruction Manual

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６．Measurement
6-1 Voltage measurement (Mains disconnection check)
(1) Connect the Earth probe to the earth of the circuit under test and
Line probe to the other side. If the circuit is not earthed, connect
Earth probe to any appropriate conductor.
(2) Take the reading on the LCD without pressing the Test button or
Remote control switch. The mark " 〜 " is displayed when
measuring AC voltage. The mark " − (minus)" is displayed when
the LINE probe is connected to the negative side of the conductor
under test to measure DC voltage. "Lo" is displayed on the LCD
when the measured voltage is under 20V.
#
DANGER

T est lead and fuse must be inspected prior to measurement
according to Clause 5-2 indicated in this manual in order to avoid
possible electrical shock hazard. Voltage cannot be measured if a
break is present on the fuse.

N ever make measurement on a circuit in which the electrical
potential exceeds AC/DC600V in order to avoid possible shock
hazard. (Refer to "3.Specification, AC voltage measurement.")

W hen testing installation that has a large current capacity, such as
a power line, be sure to make measurement on the secondary side
of a circuit breaker in order to avoid personal injury.

D o not press the Test button or Remote control switch during
voltage measurement.

N ever short live conductors with the tip of a probe to avoid
personal injury.

Do not make measurement with the Battery cover removed.
 K eep your fingers and hands behind the protective fingerguard
during measurement.

6-2 Insulation resistance measurement

Before performing any insulation test, check the maximum voltage
that may be applied to the circuit under test.
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