signal source or the load which is tested (It should over 3Hz).
4.8.3 Press “Hz/DUTY” key to choose frequency/duty cycle measurement, LCD will display
the frequency or duty cycle of the tested signal source.
NOTE:
1) There is only the auto range mode under the frequency range;
2) The meter can still work if the input current is higher than 10V rms, but the accuracy
is not guaranteed;
3) In noisy environment, it's better use shield cable to measure a low signal;
4) When measuring high voltage circuit, do not touch the high voltage circuit;
5) Don’t input voltage higher than 250V DC or AC peak value, or it may damage the
meter.
4.9 NON-CONTACT VOLTAGE (NCV) DETECT
WARNING:
This function could be affected by different external interference sources, and then the
alarm is activated by wrong signal. The measurement result is for reference only.
Turn the rotary function switch to “NCV” position. When the testing circuit is placed above
the meter, the meter displays the strength of signal, and the buzzer alarms with “beep beep”.
NOTE:
1) Even if there is no voltage indication, there may be voltage on the circuit. Do not rely
on NCV detector as the only way to detect voltage.
2) Voltage detecting may be affected by power socket design, type of insulation and its
thickness and other factors.
3) Interference sources in the external environment, such as flashing light, motor, would
cause wrong signal to activate alarm function.
4.10 Transistor hFE measurement
4.10.1 Switch the knob to hFE range；
4.10.2 Define the transistor is NPN or PNP type, then insert the emitter, base and collector
separately into the relative hole, the value will be displayed on LCD.
4.11 Diode and Continuity test:
4.11.1 Insert the black test lead into “COM” terminal and the red one into “VΩHz” terminal
(the polarity of red lead is “+”)
4.11.2 Switch the knob to Ω range, and press “SELECT” key to select diode
measurement mode, and then connect test leads with the diode under testing,
4.11.3 Forward measurement: connect red test lead to the positive polarity and the black test
lead to the cathode polarity of the diode. LCD will display the approx. value of forward
voltage drop.
4.11.4 Backward measurement: connect red test lead to the cathode polarity and the black
test lead to positive polarity of the diode. LCD will display “OL”.
4.11.5 The complete diode testing includes forward and backward measurement, if the result
doesn’t meet the descriptions above; it means the diode is broken.
4.11.6 Press “SELECT” key to select the Continuity measurement mode.
4.11.7 Connect test leads to two points of tested circuit, if the resistance is less than (50±10)
Ω, the buzzer sounds.
NOTE:
1) Don’t input voltage at “Ω ” range.
2) When test circuits, make sure the power is off and all capacitors are discharged. Any
potential or AC signal will activate the buzzer.
4.12 TEMPERATURE MEASUREMENT
4.12.1 Turn the rotary switch to “℃/℉” range. Press “SELECT” key to select ℃ or ℉
mode.
4.12.2 Insert the cold end (free end) black plug of thermocouple in “TEMP- (or COM)”
terminal, insert red plug of thermocouple in “TEMP+ (or VΩHz)” terminal, and put the
working end (temperature measuring end) of thermocouple on the surface or inside the tested
object. Then LCD will display the temperature of tested object, and the reading is in ℃/℉
(when the polarity is contrary. The reading will decrease when the temperature of the tested
object increase).
NOTE:
1) When the input terminal is open circuit, it will display the environment temperature.
2) Don’t change the temperature probe randomly, or the accuracy will not be guaranteed.
3) Don’t input voltage at temperature range.
4.13 Data hold
Press HOLD will enter HOLD mode, the current value will be held on LCD and
symbol will be displayed. Press HOLD again can exit the HOLD mode.
4.14 Auto power off
4.14.1 If there is no measurement in 15 minutes, the meter will turn into dormancy mode. 1
minute before the auto power off the built-in buzzer will be sound 5 times. Press any key to
restart the meter.
4.14.2 Keep “SELECT” key down when turn on the meter, auto power off function will be
canceled.
5. METER MAINTENANCE
The meter is a precise instrument. Random changes to the circuit are not allowed.
NOTE:
1) Don’t input the voltage value higher than DC 1000V or AC 750V rms.
2) Don’t input voltage at current, resistance, diode and continuity range.
3) Don’t make any measurements when the battery isn’t installed or the back cover isn’t
fixed.
4) Before replacing fuse, please remove the test leads from the measuring point and turn
off the power.
5) Keep the meter away from water, dust and
shock.
6) Don't expose the meter under high
temperature, high humidity, combustible,
explosive and strong magnetic place.
7) Wipe the case with a damp cloth and
detergent. Do not use abrasives and alcohol
to clean the meter.
8) If do not operate for a long time, you
should take out the battery to avoid leakage damage.
9) When “ ” symbol is displayed, you should replace the battery according to the
following steps:
9-1) Follow picture 2, and remove the holster at first.
9-2) Screw off the fixing screws of the battery door and remove the cover;
9-3) Take off the old battery and replace with a new one. To extend the using life,
it's better to use alkaline battery.
9-4) Fix the battery door.
9-5) Follow the picture to put on the holster.
10) Fuse replacement: When replacing fuse, please use fuse with same type and
specification.
10-1) Remove the holster first, then screw off the fixing screws of the battery door
and back cover to remove the cover;
10-2) Take off the old fuse and replace with a new one.
10-3) Install the back cover, then fix the screws of the battery door and back cover.
Put on the holster.
6. Trouble Shooting
If the meter does not work properly, please check the meter as following steps:
(If the problems still cannot be solved, please refer to repairing center or contact the local
dealers.)
Fatult Solution
No reading on LCD
Turn on the power;
Release the HOLD key;
Replace battery.
signal appears Replace battery.
No current input
Replace fuse.
Big error Value
Replace battery.
● The specifications are subject to changes without prior notice;
● The content of this manual is regarded as correct. If users find out any mistakes or
omissions, please kindly contact the manufacturer;
● The manufacturer will not be responsible for accidents and damage caused by
improper operations;
● The functions described in this User Manual shall not be considered as the reason for
any special usages;
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