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Note: When current is flowing from the upside
to the underside of the instrument, reading is
positive(+), on the contrary, reading to be
negative(-) when current is flowing from the
underside to the upside of the instrument.
6-1-2 AC current measurement
1- Set the function selector switch to "A"
–
position. ("
" and "A" marks will be
- --
displayed on the LCD.)
2- Place one measured conductor lower than the
triangle mark indicated on the fork shaped
sensor and make a measurement. (shaded part
in the figure)
Then measured value is displayed on the LCD.
(When the center of the conductor is not lower
than the triangle mark indicated on the fork
shaped sensor, error occurs.)
Note: For the measurement of AC current, zero
adjustment, which is required for the
measurement of DC current, is not necessary.
Current flowing direction has no relation to the
indication polarity.
6-2 Non contact voltage detection(NCV)
This function is to check the presence of
voltage without touching wires or electrodes
directly. Also can check the presence of AC
voltage in cable, outlet, fuse and circuit breaker.
Details:
While voltage is applied to a cable or outlet,
the electric field depending on the voltage is
generated. This instrument detects the
generated electric field, and verifies the
presence of AC voltage. Officially, it is called as
an instrument for detecting electrical field. But it
is not a familiar term, so we call it as "Non
contact voltage detection". General detectors
detect voltage by contacting polarized voltage
(contacts and terminals). But this instrument is
developed to satisfy this function and for safety
purpose with out contacting voltage.
!
DANGER
• To avoid getting an electrical shock, never
make measurement on the circuit in which
electrical potential over AC/DC300V exists.
• Before a measurement, be sure to check the
instrument operation with well-known power
supply. If " Err " is displayed on the LCD, do not
make a measurement.
• Do not make measurement with battery cover
removed. Indicated value on NCV range is a
reference value. Make sure to check the
voltage with a precise equipment in advance
when operator will directly touch or connect
wires.
• Indicated voltage value may be affected by
non-grounded metal tube or metal case, the
place where affected by other voltages,
handgrip or the measuring position of sensor.
6-2-1 Measurements
• Set the function selector switch to "NCV"
position.
• The sensing mode (100V or 200V) in effect is
displayed on the LCD for 1min, and NCV
measurement starts.
• Position the tip part of fork typed sensor
against the measured object. When voltage is
detected, " Hi " will be displayed on the LCD.
(Error could occur depending on the direction,
angle and contact surface of the instrument
against the measured object. On NCV range,
data hold function cannot be used.)
Note: When set the function selector switch to
NCV range, self-check function operates and
Indicates " Err ", if there is some fault or
abnormal condition. Do not make a
measurement if such indication displayed on
the LCD.
6-2-2 Sensing mode
• There are two types of sensing mode: 100V
mode and 200V mode.
• Above two modes can be changed over by
pressing the data hold button 2sec or more.
(The selected sensing mode is stored even if
switching off the instrument. When setting the
function switch to "NCV" again, measurement
can be done on the same mode.)
• Factory setting: 100V mode
1- 100V mode
Sensitivity on this mode is set sharp, therefore,
the presence of AC voltage can be checked
only by placing the instrument closer to the
measured object, such as an outlet, a plug and
parallel cords, as shown in figure.
2- 200V mode
Sensitivity on this mode is set dull, so the earth
side and non-earth side of 100V cable way can
be verified. (Where cables are crowded, such
as in a distribution board, earth side could not
be verified.) Also can check the presence of AC
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