5
Frequency measurement (Hz)
In the frequency measurement function:
Connect the red
probe cable to the “
INPUT
” socket, and the black one to the
“
COM
” socket. Set the dial to the frequency measurement
function (HZ%). Use the “Hz%” button to set the frequency
measurement function (Hz). Connect the measurement probes
to the circuit to be measured.
Note:
Do not exceed the input voltage, as this will damage the
instrument.
Measurement
limit
Resolution
Accuracy
9,999 Hz
0,001 Hz
±(0.5% 3 digits)
99,99 Hz
0,01 Hz
999,9 Hz
0,1 Hz
9,999 kHz
1 Hz
99,99 kHz
10 Hz
999,9 kHz
0,1 kHz
9,999 MHz
1 kHz
Input voltage: 200 mV - 10V AC RMS
Over-voltage protection: 250 V DC or 250 V AC RMS
When measuring AC:
Warning! Before performing a measurement, unplug the probe
cables from the unit.
Set the dial to the desired measurement range (40
A
,
400
A
). Use the “SEL” pushbutton to set the alternating
current (AC) function. Use the “Hz%” button to set the frequency
measurement function (Hz). Open the clamp, place it around the
cable then close it.
Measurement
limit
Resolution
Accuracy
10 Hz
0,01 Hz
±(1.5% 5 digits)
1 KHz
1 Hz
>1 KHz
1 Hz
Measurement limit: 10 Hz – 1 KHz
Input current range: ≥ 4 A AC RMS (higher input current is
required at a higher frequency)
Max input current: 400 A AC RMS
When measuring AC voltage:
Connect the red probe cable to the “INPUT” socket, and the black
one to the “COM” socket. Set the dial to the AC voltage position
(
~V
). Use the “Hz%” button to set the frequency measurement
function (Hz). Connect the measurement probes to the circuit to
be measured.
Measurement
limit
Resolution
Accuracy
10 Hz
0,01 Hz
±(1.5% 5 digits)
1 KHz
1 Hz
10 KHz
1 Hz
>10 KHz
1 Hz
The accuracy of the
measurement result is
not guaranteed.
Measurement limit: 10 Hz – 10 KHz, Input voltage range: ≥ 0.6 V
AC RMS (higher input voltage is required at a higher frequency),
Input impedance: 10 MΩ, Maximum input voltage: 600 V AC RMS
Duty factor measurement (%)
Measuring
range
Resolution
Accuracy
0 – 100 %
0.1 %
±3%
In the duty factor measurement function:
Connect the red probe cable to the “INPUT” socket, and the black
one to the “COM” socket. Set the dial to the duty factor measurement
function (HZ%). Use the “Hz%” button to set the duty factor function
(%). Connect the measurement probes to the circuit to be measured.
Note:
Do not exceed the input voltage, as this will damage the
instrument. If the duty factor is less than 10%, the “UL” symbol
will appear on the LCD display. If it is greater than 99.9%, the “UL”
symbol will appear on the LCD display.
Measurement limit: 1 Hz-10 MHz
Input voltage: ≥ 500 mV RMS
Over voltage protection: 250 V AC RMS
When measuring AC:
Warning! Before performing a measurement, unplug the probe
cables from the unit. Set the dial to the desired measurement range
(40
A
, 400
A
). Use the “SEL” pushbutton to set the alternating
current (AC) function. Use the “Hz%” button to set the duty factor
function (%). Open the clamp, place it around the cable then close it.
Note:
If the duty factor is less than 10%, the “UL” symbol will appear
on the LCD display. If it is greater than 94,9%, the “UL” symbol will
appear on the LCD display.
Measurement limit: 10 Hz – 1 KHz
Input current range: ≥ 4 A AC
Max input current: 400 A AC RMS
When measuring AC voltage:
Connect the red probe cable to the “INPUT” socket, and the black
one to the “COM” socket. Set the dial to the AC voltage position (
~V)
.
Use the “Hz%” button to set the duty factor function (%). Connect the
measurement probes to the circuit to be measured.
Note:
If the duty factor is less than 10%, the “UL” symbol will appear
on the LCD display. If it is greater than 94,9%, the “UL” symbol will
appear on the LCD display.
Measurement limit: 10 Hz-10 KHz
Input voltage: ≥ 1 V AC RMS
Input impedance: 10 MΩ
Maximum input voltage: 600 V AC RMS
Diode and interruption testing
Diode testing:
Connect the red probe cable to the “INPUT” socket,
and the black one to the “COM” socket (the red probe is “+” polarity).
Set the dial to the position. Use the “SEL” pushbutton to set the
diode testing ( ) function. Connect the red probe cable to diode’s
anode, and the black one to its cathode. The display will show the
diode’s approximate forward voltage. If the connection is reversed,
“OL” will appear in the display.
Interruption testing:
Connect the red probe cable to the
“INPUT” socket, and the black one to the “COM” socket (the
red probe is “+” polarity). Set the dial to the
position.
Use the “SEL” pushbutton to set the interruption testing
( ) function. Connect the measurement probe to the circuit to
be tested. If the circuit is connected to a power source, switch of
the power source and discharge the capacitors before starting
measurement. Short-circuits (less than 40 Ω) will be indicated by
the built-in buzzer.
Note:
If the measured value is more than 400 Ω, the “OL” symbol
will appear on the display.
