Transistor, Diode and Continuity test; And it also has the features of
Bar Graph, Unit Indication, Data Hold, Relative Value Measurement
(REL), USB Interface, AUTO/MANUAL range selection, Auto Power
Off and Alarm Buzzer. The instrument adopts the directly driven 4
digits microprocessor and dual-integral A/D converter, which
provide the high solution and high accuracy digital displaying driver.
Because of its outstanding features, it is an excellent tool and most
suitable for lab, factory, maintenance and repair users.
Open-package Inspection
Open the package box and take out the instrument, check the
following accessories carefully. If any accessory was lost or
damaged, please contact the manufactory at once.
• Digital Multimeter 1pc
• Operation Manual 1pc
• Test Lead 1set
• Temperature Cable 1pc
• USB Cable 1pc
• Software disc 1pc
• Transistor test accessory 1pc
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Safety Note
The instrument meets the standard of IEC1010 (safety standard
promulgated by the International Electrician Committee). Design
and manufacture complied with the standard of Pollution Degree
Warning
To avoid endangering the users safety, should read the operation
manual carefully before operation, and strictly obey the safety
warning information and operation description when use the
instrument.
1. Caution to avoid the electric shock when measuring the voltage
higher than 30V, the current higher than 10mA, AC Power Lines
with Inductive Load and the AC Power Lines during the period of
Electric Power Fluctuation.
2. Before measuring, should check if the function knob is set in the
correct range, make sure the test lead connects reliably, links up
correctly, and insulates properly to avoid the electric shock
3. It meets the requirements of the safety standard only to use the
instrument with the equipped test lead. If the test lead is broken,
should replace it by the same type and same electric specification
test lead.
4. Do not replace the inside fuse by the unconfirmed one. Only
replace it by the same type and specification fuse. Before
replacement, should keep the test lead off the tested point to make
sure there is no any signal at the input terminal.
5. Do not replace the inside battery by the unconfirmed one. Only
replace it by the same type and electric specification battery. Before
replacement, should keep the test lead off the tested point to make
sure there is no any signal at the input terminal.
6. When measuring electricity, do not connect the body with the
ground directly, and do not touch the possible exposed metal
terminal, output socket or lead clamp with ground potential. Usually
use the dry cloth, rubber overshoes, rubber cushion and other
insulated materials to keep the body isolated with the ground.
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7. Do not store and use the instrument in high humility, high
temperature, combustible, explosive and strong magnetic places.
8. It is possible to damage the instrument and endanger the safety
of the users when measuring the voltage over the range limit. The
allowed maximum voltage is printed on the front panel of the
instrument, do not input the range limit specified to avoid the
electric shock and instrument damage
9. Do not measure any voltage when connecting the test lead with
the current terminal to avoid damaging the instrument and
endangering the safety of the users.
10. Do not try to calibrate or repair the instrument, should operate it
by the specially trained or qualified professional people.
11. The function/range selection knob should be set in the correct
range when measuring. When switching the function/range
selection knob, keep the test lead off the tested object to make sure
there is no any signal at the input terminal. Do not switch the
function/range selection knob when measuring.
12. When LCD displays “
make sure the measuring accuracy.
13. Do not allow to measure the voltage when connecting the test
lead with the current terminal!
14. Do not try to modify the inner circuit at will to avoid damaging
the instrument and endangering the safety of the users.
”, please replace the battery in time to
Safety Symbol Description
Warning
High Voltage!
Dangerous!
GND
Dual Insulation
Low Battery
4
DCA
ACA
DCA & ACA
Meets the direction
of European IEC
Fuse
Page 6
Front Panel Description
1. Instrument Model Number
2. LCD Display
3. RANGE: Auto Range/ Manual
Range switch, the default is set as
Auto Range mode when turning
on, press the button and switch to
Manual Range. At the Manual
Range mode, press the button
once, the range is switched to the
higher one, press the button again
to switch the range to the lowest
one when measuring the highest
range, the cycle is in proper order
from low to high. Keep pressing the button for 2 sec, return to
Auto Range mode. There is no Manual Range mode at
Frequency, hFE and Capacitance range.
4. HOLD: Date Hold button, press the button, the value is held on
LCD; Press the button again, exit the hold mode and get into the
normal measuring status. Press the button more than 2 seconds,
the back light will be light up, press again the backlight turns off
or automatically turns off after 10 seconds.
5. HZ/DUTY: Frequency/Duty Circle selection button, press the
button to switch between the Frequency and Duty Circle mode at
Frequency Range; Press the button to switch to Voltage or
Current/Frequency/Duty Circle model at AC Voltage or AC
Current Range.
6. MAX/MIN: Maximum, Minimum, press the button, the instrument
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gets into the MAX mode, the measuring maximum value will be
held at this mode; Press the button again to get into the MIN
mode, the measuring minimum value will be held at this mode. At
the MAX/MIN mode, the maximum or minimum value will be held
on LCD. Under this circumstance, there are no Bar Graph and
Auto Power Off function, hold pressing MAX/MIN button for 2
seconds, exit the MAX/MIN mode.
7. SELECT: function switch, press the button to switch the
measuring function.
8. RS232/REL: Relative Value Measurement, press the button to
the mode of Relative Value Measurement, press again to cancel
the Relative Value Measurement. Keep pressing the button more
than 2 seconds to switch to RS232 symbol appears on LCD, it
indicates the instrument is getting into the status of data
transmission. Keeping pressing the button more than 2 seconds,
RS232 symbol disappears, the data transmission is stopped.
9. Function/range selection knob: select the measuring function
and range.
10. 10A current input terminal: Measuring AC/DC 10A positive input
terminal, insert red test lead.
11. mA input terminal: Measuring AC/DC uA/mA and Temperature
positive input terminal. The hFE input terminal.
12. COM input terminal: Temperature negative input terminal,and
2. One year calibration guarantee since the time dispatched from
the factory.
DC Voltage (DCV)
1. Turn the function/range selection knob to DCV/ACV. Insert the
red and black test lead separately to VΩHz and COM input terminal,
press “SELECT” button to switch to DCV measurement mode.
2. The instrument was preset as the Auto Range mode of DCV
measurement, display “AUTO” symbol on LCD, press “RANGE”
button to switch to the Manual Range mode.
3. Connect the test lead to the tested circuit in parallel, the polarity
of the red test lead and the tested voltage value will be displayed on
LCD simultaneously.
” appearance
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Note:
a) Do not measure the voltage higher than DC 1000V or AC 750V.
b) When measuring the high voltage, caution to avoid electric shock.
Cut the connection between the test lead and tested circuit at once
after measurement.
C) At the Manual Range mode, if “OL” is displayed on LCD, it
indicates the tested voltage value has exceeded the present range
limit, please select the higher range to complete the measurement
Range Accuracy Resolution
600mV 0.1mV
6V 1mV
60V 10mV
600V
1000V ±(1.0%+6d) 1V
Input impedance: >60MΩ at Range
600mV , 10MΩ at other range.
Overload protection: 1000V DC or 750V AC peak value.
±(0.5%+4d)
100mV
AC Voltage (ACV)
1. Turn the function/range selection knob to ACV/DCV, press
“SELECT” button to switch to ACV measurement mode. Insert the
red and black test lead separately to VΩHz and COM input terminal,
displayed as the following picture.
2. The instrument was preset as the Auto Range mode, displays
“AUTO” symbol on LCD, press “RANGE” button to switch to the
Manual Range mode. Press “Hz/DUTY” button to measure
Frequency/Duty Circle at the Auto Range or Manual Range mode.
But the frequency response is very low, at this time, it suits to
measure the circuit of high voltage and low frequency under the
circumstance of magnetic disturbance, such as
220V/50Hz-400Hz,380V/50Hz~400Hz.
3. Connect the test lead to the tested circuit in parallel,the polarity of
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the red test lead and the tested voltage value will be displayed on
LCD simultaneously
Note:
a) Do not measure the voltage higher than DC 1000V or AC 750V.
b) When measuring the high voltage, caution to avoid electric shock.
Cut the connection between the test lead and tested circuit at once
after measurement.
C) At the Manual Range mode, if “OL” is displayed on LCD, it
indicates the tested voltage value has exceeded the present range
limit, please select the higher range to complete the measurement
Range Accuracy Resolution
6V 1mV
60V 10mV
600V
750V ±(1.0%+10d) 1V
Input impedance: 10MΩ. Overload
protection : 1000V DC or 750V AC peak
value.
Frequency response: 40-400Hz. Indication: average value
response (RMS of sine wave).
Duty Circle indication (0.1%~99.9%)
±(0.8%+10d)
100mV
DC Current (DCA)
1. Insert the black test lead to “COM” input terminal and the red test
lead to “mA ”or “10A”, displayed as the picture.
2. Turn the function/range selection knob to current range, press
“SELECT”, switch to DC measurement mode, then connect the test
lead with the tested circuit in series, the polarity of the red test lead
and the tested current value will be displayed on LCD
simultaneously.
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3. At the Manual Range mode,if “OL” is displayed on LCD, it
indicates the test current value has
exceeded the present range limit, please select the higher range
to complete the measurement.
Note:
a) Do not measure the current higher than 10A at Range 10A and
higher than 6000uA at uA Range and higher than 600mA at mA
Range, otherwise the fuse will be burnt out or the instrument will be
damaged.
b) Do not connect the test lead to any circuit in parallel when the
test lead is inserted in the current input terminal, otherwise it is
possible to damage the instrument or endanger the safety of the
users. Cut the connection between the test lead and tested circuit at
Open circuit voltage: 400mV. Over range protection: 250V AC/DC
peak value.
Diode and Continuity Test
1. Turn the function/range selection knob toRange, Insert the
red and black test lead separately to VΩHz and COM input terminal.
Press “SELECT” button to choose the Buzzer or Diode
measurement function.
2. Connect the red test lead to the positive pole of the tested diode,
BLACK test lead to the negative pole.
4. Read the present test result from LCD. (Note: no Bar Graph
display at Diode Range)
Note:
a) If the diode is open circuit or the polarity is connected counter,
“OL” will be displayed on LCD.
b) When measuring the in-circuit diode, make sure all the power of
the tested circuit has been turned off and all capacitors are fully
discharged.
c) Cut the connection between the test lead and tested circuit at
once after measurement.
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Range Display Test Condition
Diode
Overload protection: 250V DC/AC peak value.
Forward
voltage drop
Buzzer sound
at less than
50Ω
Warning: Do not input the voltage at the range for safety.
Forward AC Current:1.0mA,
Counter Voltage: 3.0V
Open Voltage: 0.5V
Capacitance (C)
1.Turn the function/range selection knob to Capacitance Range.
Insert the red and black test lead separately to VΩHz and COM
input terminal.
2. Connect the test lead to the tested capacitor in parallel, the
tested capacitor value will be displayed on LCD.
3. If “OL” is displayed on LCD, it indicates the test capacitor value
has exceeded the present range limit.
Note:
a) When measuring the in-circuit capacitor, make sure all the power
of the tested circuit has been turned off and all capacitors are fully
discharged.(Note: no Bar Graph display at this range)
b) It requires longer testing time when measuring the large
capacitor, it takes about 15 seconds at Range 100uF.
c) Cut the connection between the test lead and tested circuit at
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once after measurement.
Range Accuracy Resolution
40nF ±(5.0%+30d) 10pF
400nF 100pF
4μF 1nF
40μF
200μF ±(5.0%+10d) 100nF
Overload protection: 250V DC/AC peak value
±(3.5%+8d)
10nF
WARNING: Do not input any voltage at this range for safety!
Frequency (Hz)
1. Turn the function/range selection knob to Hz Range. Insert the
red and black test lead separately to VΩHz and COM input
terminal.
2. Connect the test lead to the tested signal source in parallel, Read
the present test result from LCD. (Note: no Bar Graph display at this
range)
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3. When measuring Frequency, press “Hz/DUTY” button once to
get into the mode of DUTY measurement, and press “Hz/DUTY”
button again to return to the mode of Frequency measurement.
4. When measuring AC current or voltage, press “Hz/DUTY” button
to get into the mode of Frequency measurement, and press
“Hz/DUTY” button again to get into the mode of Duty Circle
measurement, and press the button third to return to the mode of
AC current or voltage measurement.
Note:
a) Do not input the signal
more than 60V. Otherwise it is
possible to damage the
instrument and endanger the
safety of the users.
b) Cut the connection
between the test lead and
tested circuit at once after
measurement.
Range Accuracy Resolution
100Hz 0.01Hz
1000Hz 1Hz
10kHz 10Hz
100kHz 100Hz
1MHz 1kHz
30MHz
Input sensitivity: 1.0V.
Overload protection: 250V DC/AC peak value.
Duty Circle Indication: (0.1%-99.9%)
±(0.5%+4d)
10kHz
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Transistor Test
1. Turn the function/range selection knob to “hFE” Range,
displayed as the right picture.
2. Insert the accessory of
Transistor test into the “mA ”
and “COM” input terminal,
displayed as the
picture.According to the model of
the tested transistor, insert the
accessory accordingly into the
terminal of “EBC” of “NPN” or
“PNP”.
4. Read the present test result
from LCD.
Note:
a) Do not input the current or voltage at the input terminal of “mA ”,
“COM” or transistor accessory, otherwise it is possible to damage
the instrument or endanger the safety of the users.
b) There are no Data Hold, MAX/MIN, Bar Graph function at
Transistor Test mode
Range Scope of DisplayTest Condition
hFE(NPN or
PNP)
0-1000
Temperature Test
1. Turn the function/range selection knob to Temperature Range.
2. Insert the two ends of the temperature sensor Into the “COM”
and “mA” input terminal, the
Base Current:1mA
VCE:2.1V
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positive end into the “mA” input terminal.
3. Connect the sensor of the temperature cable to the surface or
inside of the tested object,
read the present test result from LCD.
4. Press “SELECT” button to switch Fahrenheit or Centigrade
temperature measurement mode.
Note:
a) Without the signal input, LCD automatically displays the present
temperature.
b) Do not replace the temperature sensor at will. Otherwise the
accuracy can’t be assured.
c) Do not input the voltage at Temperature Range, caution to avoid
damaging the instrument.
Range Accuracy Resolution
-20℃ - 400℃ ±(1.0%+50d) 0.1℃
400℃ - 1000℃ ±(1.5%+15d) 1℃
0℉ - 750℉ ±(1.0%+50d) 0.1℉
750℉ - 1832℉ ±(1.5%+5d) 1℉
Overload protection: 0.5A/250V
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Other Functions and Instrument Maintenance
• Other Functions
1. Data Hold
Press “HOLD” button, the present value is held on LCD; Press the
button again, exit the hold mode and get in the normal measuring
status.
2. Auto Power Off
Stop working for 15 minutes, the instrument will auto power off, and
get into the sleeping mode. The buzzer inside will sound 5 times
within one minute before powering off, there is a long sound one
minute later and the instrument gets into the sleeping mode. Press
any key to restart the power.
3. Ress “REL/RS232”button to get into the Relative Value
Measurement mode, Keep holding “REL/RS232” button more than
2 seconds, RS232 symbol is displayed on LCD, it indicates it is the
status of the instrument connecting with PC, then connect the
instrument to PC by USB Cable, accessory of the instrument, and
then can transmit the measuring data to PC, it is convenient to
record, analyze, process and print the measuring results, etc.
Please refer the details to the description in the software.
4. Backlight function: if need to measured in the dark environment,
please press the "HOLD" button more than 2 seconds, then the
LCD can be light for help reading, about 10 seconds the light turn
off. If need to lighting again, press "HOLD" button for 2 seconds
again.
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Instrument Maintenance
This is a highly precise instrument, do not try to modify the inner
circuit at will.
1. Keep the instrument dry, and keep it away form dust and shock.
2. Do not store and use the instrument in high humility, high
temperature, combustible, explosive and strong magnetic places.
3. Clean the surface of the instrument with the damp cloth and
gentle detergent, do not use the strong solvent like the abrasive
cleaner and alcohol, etc.
4. Take out the batteries if do not use the instrument for a long time
to prevent the batteries from leaking the liquid to corrode the
instrument.
5. When LCD displays “
batteries as the following steps:
5-1. Loose the screw that fixes the batteries, and remove the
battery case.
5-2. Remove the spent 1.5V batteries, and replace them by two
same type new batteries. It is better to use alkaline batteries for
lengthening the usage time.
5-3. Fit on the battery case and tighten the screw.
5-4. The steps of replacing the fuse are same as the above. When
replacing the fuse, please use the same specification, same type of
fuse.
“ symbol, should replace the
Note:
1. Do not input the voltage more than 1000V DC/AC peak value.
2. Do not measure the voltage at the Current, Resistance, Diode
and Buzzer Range.
3. Do not use this instrument to measure before fixing the battery or
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tightening the bottom case
4. Please remove the test lead from the tested point and turn the
power off before replacing the battery or fuse.
FAULT ELIMINATION
If the instrument does not work properly, the below methods can
help you to solve the problems quickly. If the fault still can’t be
eliminated, please contact the maintenance center or the
distributors:
Fault Solution
Power off – turn on the power
No display
Hold Key- set a correct mode
Replace battery
symbol appearance
No current input
Error value
The instruction manual is subject to change without notice.
The contents in the instruction manual are considered to be correct, if the users find any
errors or pretermission, etc., please contact the manufacturer.
The manufacturer hereby will not be responsible for any accident and damage caused by
the improper operation.
The functions described in this instruction manual do not be the reason for special usage.