4671 : 28-09-2012
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3.1.2. Out of Balance Leakage Current a. Set the rotary switch at desired range
b. Press the trigger to open the jaw and fully enclose all two
wires (single phase, two wires), three wires (three phases,
three wires) or four wires (three phases, four wires). Make
sure the two half jaws are properly closed.
c. Read the measured value from the LCD display.
3.1.3. Using the 50/60 and Wide Selector
50/60 Position
This clamp meter has very good frequency response due to
the electric property of the transformer jaws used. There
fore, the measurement result contains not only the fundamental
frequency of 50/60Hz but also the high frequencies and
harmonics superimposed on the fundamental frequency. To
eliminate the effect of high frequency noise, a low pass filter is
designed to filter out high frequency signal. To enable the
fiiter, set the switch at the 50/60 position. The filter’s cut-off
frequency is set at 100Hz with an attenuation characteristic
of approx. 24dB/octave.
Wide Position
If the circuit under test is originated from a high frequency
generating device such as invertcr, switching regulators, etc.,
then the switch should be set at wide position to measure the
signal which contains the frequency from 40Hz - 1KHz.
To make sure thc presence of high frequency signal, set the
switch at 50/60 and wide position to see the difference. If the
reading is very different, it is certain that the high frequency
signals or harmonics present.
3.2. AC Load Current
Measurement
LOAD LAKAGE
CURRENT CURRENT
a. Set the rotary swit-h at desired range.
b. Press the trigger to open the jaw and fully enclose only one
wire. No air gap is allowed between the two half jaws.
c. Read the measured value from the LCD display.
3.3. AC Voltage Measurements
WARNING : Maximum input for DC V is 600, and for AC V is 600.
Do not attempt to take any voltage measurement that exceeds
the limits. Exceeding the limits could, cause electrical shock and
damage to the clamp meter.
a. Set the rotary switch at 400V
b. Insert the test leads into the input jack.
c. Connect the test prods of the test leads in PARALLEL to
the circuit to be measured.
d. Read the measured value from the LCD dispiay.
WARNING : Before taking any in-circuit resistance mcasurement,
remove power from the circuit being tested and discharge all the
capacitars.
3.4. Resistance and Continuity Measurement
3.4.1. Set the rotary switch at V
3.4.2. Insert the test leads into the input jack.
3.4.3. Connect the test prods of the test leads to the two ends
of the resistor or circuit to be measured. 1211
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3.4.4. Read (he measured value from the LCD dispiay.
3.4.5. If the resistance is lower than 40V, a beeping sound
shall be heard.
3.5. Relative Reading Measurements
The zero button also can be used to make a relative
measurement. Once the button is pushcd, the currcnt reading
is set to zero and a zero symbol shall be displayed on LCD.
All the subsequent measurement shall be displayed as a relative
value with respecl to the value being zeroed. Press the zero
button for 2 seconds to return to normal mode.
3.6. Holding the LCD Reading
Press the HOLD button, then the reading shall be hold and
kept on LCD.
3.7. Finding the MAX/MIN Value
Press the MAX/MIN button to enable the maximum and
minimum values to be recorded and updated during
measurement. Push the button once,the maximum value shall
be displayed and updated. Push again (second push), the
minimum value shall be displayed. Push again (third push),
MAX/MIN function shall be disabled and return to the normal
measurement mode.
3.8. Auto-Power-Off
The meter will turn itself off 30 minutes after power-on. To turn
it on again, user can either press the HOLD bulton or turn the
power off and turn it on again.
To disable the Auto-Power-Off function, hold the HOLD button
while turning on power.
