display on LCD.
3.
If the measured current is unsure beforehand, should set the range knob to a
higher range, then, switch to a proper range according to the displayed value.
4.
If “OL” displays, it means over-range, should set the range knob to a higher
range.
5.
When tested current
≥
10A under 20A range ,buzzer will be sound.
6.
Max. input current is 400mA or 20A
（
subject to where red lead insert
）
，
excessive current will blow the fuse. Be careful when measuring 20A due to
un-fused. Continuously measuring large current may heat the circuit, affect the
accuracy, even damage the meter.
4-6. Resistance measurement
1.
Insert the black lead to “COM” socket and the red one to “ V
Ω
Hz” socket.
2.
Set the function switch to “
Ω
” range, if the resistance under measured f
unknown, should set to a higher range.
3.
press “Range ” key to select auto range or manual range mode.
4.
If measuring the small resistance, should short-circuit at first, press “REL”
key,and then measuring the unknown resistane, it actual resistance will be
display on the LCD.
NOTE:
1.
If the measured resistance is unsure beforehand, should set the range knob to
a higher range, then, switch to a proper range according to the displayed
value.
2.
If “OL” displays, it means over-range, the range knob should be set to a
higher range.When the resistance is over 1M
Ω
, the reading should take a
few seconds to be stable. It is normal at high resistance measurement.
3.
When input terminal is open circuit, “OL” displays.
4.
When measuring in-line resistance, be sure the power has been turned off
and all capacitors are fully released.
5.
Do not input voltage at this range.
4-7. Capacitance measurement
1.
Set the function switch to “
” range
2.
Insert the black lead to “COM” socket and the red one to “ V
Ω
Hz” socket.
3.
If the LCD isn’t display zero ,press “REL” key to clear zero.
4.
Insert the capacitor to “Cx” socket according to the polarity, the value will
display on LCD.
NOTE:
1.
Don’t input voltage and current signal in the “V
Ω
Hz” jack when measuring the
capacitor.
2.
Be sure to press “REL” to clear zero before measuring.
3.
Capacitance range only have auto range working mode.
4.
Release the capacitors completely to avoid damaging the meter
5.
200uF range input reading steady large than 15 Sec,.
6.
Unit: 1uF=1000nF 1nF=1000pF
4-8. Frequency measurement
1.
Insert the black leads to “COM” socket and the red one to “V
Ω
Hz” socket.
2.
Set the range switch to “Hz” range.
3.
The range is auto-range. Connect the leads across to the signal under measured, the
value will be displayed on LCD.
NOTE:
1.
There is only auto-range at this range.
2.
When input is over 10V Ac rms, reading is possible, but maybe over-range.
3.
It’s better to use shield cable when measuring small signals in noisy place.
4.
Be careful when measuring high voltage.
5.
Do not input voltage over 250V DC/AC peak value.
4-9. hFE measurement
1.
Set the function switch to hFE range.
2.
Define the transistor is NPN or PNP type, insert the emitter, base and collector
separately to the correct hole, the approx. value will be displayed on LCD.
4-10. Diode and continuity Test
1.
Insert the black leads to “COM” socket and the red one to “V
Ω
Hz” socket( the polarity
of the red one is “+”).
2.
Set the FUNCTION switch to “
” position. Press “
DC/AC
”key to
select diode measuring.
3.
Forward measurement: connect the red test leads to the “+” polarity of the diode under
tested and the black one to “-“, the approx. forward voltage of this diode will be
displayed on LCD.
4.
Backward measurement: connect the red test lead to the “-“ of the diode and the black
one to “+”, and LCD will displayed OL. The completely measurement includes
forward and backward measurement, if the result can not meet with the
above, it means the diode is workless.
5.
Diode test include forward measurement and backward measurement, if
the result is different with above, the diode is bad.
6.
press “DC/AC” key to select continuity test.
7.
Continuity test: the buzzer sounds when the resistance under measured is
less than (70+10)
Ω
.
Note:
1.
Do not input voltage at this range.
2.
Turn off the power and release all capacitors when testing in line.
4-11. Temperature measurement
1.
Set the function switch to “
℃
” range.
2.
Insert the cold point of thermocouple too “Temp” socket and the working
point to the place wanted to take temperature, the value will be displayed
on LCD.
NOTE:
1.
When the input terminal is in open circuit, will display the “ normal
temp.”
2.
Do not change the thermocouple, or, the accuracy can not be secured.
3.
Do not input voltage at this range.
4-12.DATA HOLD
Press “ HOLD” key once, the current data will be hold on LCD, press it
again, data is canceled.
4-13 Auto power off
1.When operating after 15 minutes, the meter will be auto power off and
into sleep mode; Press “POWER AUTO OFF” key twice can turn the power
on
2.press “DC/AC” key before turn on, it can cancel auto power off function.
MAINTENANCE
1.
Do not try to modify the inner circuit.
2.
Do not input a voltage over 1000V DC/AC peak value.
3.
Do not measure voltage at current range, resistance range, diode and