KYORITSU 3128 User Manual

Page 33

KEW3128

6. Measurement

Check of Power Interruption（Voltage Measurements）

DANGER

●

Do not make measurement on a circuit above AC/DC600V(voltage to earth)

to avoid possible electric shock.Do not make a measurement, even if a line
voltage is 600V or less, when a voltage to earth is over 600V.

●

When testing installation that has a large current capacity, such as a power

line, be sure to make measurements on the secondary side of a circuit
breaker in order to avoid possible hazard to the user.

●

Extra precaution shall be taken to minimize the possibility of shorting the

power line with the metal tip of test lead at voltage measurement. It may
cause personal injury.

●

Do not make measurement with the Battery Cover removed.

Voltage can be measured by selecting the “Vtest (Voltage)” on the Mode
selection screen. (=>P.22 How to select a Measurement Mode) No need
to press the Test Button to start a measurement.

This instrument is equipped with AC/DC auto-detect circuit, and can
measure DC voltages. At a DC voltage measurement, when applying
positive voltage to the Line Probe (red), positive values are displayed on
the LCD.

① Turn off the Circuit Breaker of

the circuit under test.

②

Connect the Earth Cord (black) to
the earth side of the circuit under
test and the Line Probe (red) to
the line side respectively.

③

The voltage displayed on the LCD
shall be “Lo V”. If not, voltages
of 30V or more is applied on
the circuit under test. Check
the circuit under test again and

confirm that the Circuit Breaker is turned off.

Refer to

Voltage Measurement (=>P.68) for further details on the

indications on the LCD.