DIGITAL MULTIMETER
OPERATOR’S MANUAL
1. Overview
The multimeter is characterized at slim size, portable, stable performance and anti-dropping
capacity. Using 6000 counts digit LCD monitor with character 25mm high, they offer clear readings.
With overall circuitry design centering on large-scale IC A/D converters in conjunction and
over-load protection circuit, the meters give excellent performance and exquisite making as a
handy utility instrument.
The meters can be used to measure DC & AC voltage, DC & AC current, resistance, capacitor,
frequency, duty cycle, temperature, battery test, Non Contact AC Voltage (NCV) detection,
positive diode voltage fall and audible continuity.
2. Panel Layout
1. Test lead fixture: Fix the test lead.
2. CDS sensor: The CDS sensor can reaction to the ambient brightness range, then automatically
control the LCD backlight to lighten or go out.
3. NCV detection area: Non Contact AC Voltage (NCV) detection area.
4. NCV red light: Non Contact AC Voltage (NCV) detection red light.
5. NCV green light: Non Contact AC Voltage (NCV) detection green light.
6. LCD display: 6000 counts digit, full function symbol display.
7. SELECT key: This key work on the " " range, press the key to choose resistance,
diode, continuity or capacitance test, on the voltage or current range, change to DC or AC, on the
range, change to ℃ or ℉ test; If press and hold SELECT key to power on, “Auto Power
Off ” function will be disabled.
8. RANGE Key: Press the “RANGE” key, the meter enters manual range mode, press it more than
2 seconds again, return to auto mode.
9. HOLD key: Press the “HOLD” key to lock display value, and the “DH” sign will appear on the
display, press it again to exit.
10. REL Key: Press the “REL” key, the meter enters relative measuring mode, “REL” is displayed
on the LCD and the present reading becomes the reference value and displayed on the display.
Relative measurement REL△=measurement value-Reference value.
11. Hz/% Key: On “ACV/ACA” or “Hz” range, press the “Hz/%” key, you can choose the
Frequency or Duty Cycle measurement.
12. Rotary Switch: Use this switch to select functions and ranges.
13.COM: COMandTemperature “-” Input Jack 14.10A:10AInputJack
15. VΩmA: V/μAmA/Hz/BATT/ andTemperature “+” InputJack
16. Crust of meter 17.Protective casing
3. Safety Information
3-1 The meter is designed according to IEC-1010 concerning electronic measuring instruments
with an over-voltage category 600V (CAT Ⅲ) and pollution 2.
3-2 Follow all safety and operating instructions to ensure that the meter is used safely and is kept
in good operating condition.
3-3 safety symbols:
Important safety information, refer to the operating manual.
Dangerous voltage may be presence.
Double insulation (protection Class II)
4. Special Cautions for Operation
4-1 The meters can be safe only according to standard procedures when used in conjunctions
with the supplied test leads. To replace damaged test leads with only the same model or same
electric specifications.
4-2 To avid risk of electric shock, do not use the meters before the cover is in place.
4-3 The range switch should be right position for the testing.
4-4 To avoid electric shock and damaging the instruments, the input signals are forbidden to
exceed the specified limits.
4-5 When measuring TV set or switched power, attention should be paid to the possible pulses
that may bring destruction to the circuit.
4-6 Range switch position is forbidden to be changed at random during measurement.
4-7 Take caution against shock in the course of measuring voltage higher than DC 60V & AC 30V.
4-8 Protection fuse should be replaced only with same type and same specification.
4-9 After operation is finished, set function switch at OFF to save battery power.
4-10 If the meter is without usage for long time, take out battery to avoid damage by battery
leakage.
5. GENERAL SPECIFICATIONS
5-1 Max Voltage between input terminal and Earth Ground: CAT Ⅲ 600V
5-2 Over-range Indication: display “OL” for the significant digit.
5-3 Automatic display of negative polarity “-” .
5-4 Low Battery Indication: “ ” displayed.
5-5 Max LCD display: 6000 counts digit.
5-6 Auto range & Manual range control
5-7Auto Power Off: When measurement exceeds 15 minutes without switching mode and
pressing key, the meter will switch to standby mode. Press any key to exit standby mode.
When restart the system, press and hold SELECT key to disable auto power off.
5-8 Auto LCD backlight
5-9 Fuse protection: 600mA/250V PPTC Resettable Fuse
F-10A/250V Fuse
5-10 Power supply: 1.5V×2 “AA” R6P battery
5-11 Operating Temp.: 0℃ to 40℃ (relative humidity <85%)
5-12 Storage Temp.:-10℃ to 50℃ ((relative humidity <85%)
5-13 Guaranteed precision Temp.: 23±5℃ (relative humidity <70%)
5-14 Dimension: 150x106x36mm
5-15 Weight: approx. 250g (including battery)
6. Testing Specifications
Accuracy is specified for a period of year after calibration and at 18℃ to 28℃
(64℉ to 82℉) with relative humidity to 70%.
6-1 DC Voltage
Range Resolution Accuracy
600.0mV 0.1mV
±(0.5% of rdg + 2 digits)
6.000V 1mV
60.00V 10mV
600.0V 100mV
600V 1V ±(0.8% of rdg + 2 digits)
-- Impedance: 10MΩ, More than 100MΩ on 600mV range
-- Overload protection: 600V DC or AC rms
6-2 AC Voltage (True RMS)
Range Resolution Accuracy
600.0mV 0.1mV ±(5.0% of rdg + 5 digits)
6.000V 1mV
±(1.0% of rdg + 3 digits)60.00V 10mV
600.0V 100mV
600V 1V ±(1.5% of rdg + 3 digits)
-- Impedance: 10MΩ, More than 100MΩ on 600mV range
-- Overload protection: 600V DC or AC rms
-- Frequency Range: 40 to 400Hz
-- Response: average, calibrated in rms of sine wave
6-3 DC Current
Range Resolution
Accuracy
600μA 0.1μA
±(1.2% of rdg + 2 digits)
6000μA 1μA
60mA 10μA
600mA 100μA
6A 1mA
±(2.0% of rdg + 3 digits)
10A 10mA
-- Overload protection: 600mA/250V PPTC Resettable Fuse
F-10A/250V Fuse, 10A up to 10 seconds
6-4 AC Current (True RMS)
Range Resolution
Accuracy
600μA 0.1μA
±(1.5% of rdg + 3 digits)
6000μA 1μA
60mA 10μA
600mA 100μA
6A 1mA
±(2.5% of rdg + 5 digits)
10A 10mA
-- Overload protection: 600mA/250V PPTC Resettable Fuse
F-10A/250V Fuse, 10A up to 10 seconds
-- Frequency Range: 40 to 400Hz
-- Response: average, calibrated in rms of sine wave
6-5 Resistance
Range Resolution Accuracy
600Ω 0.1Ω ±(1.0% of rdg + 3 digits)
6kΩ 1Ω
±(1.0% of rdg + 2 digits)
60kΩ 10Ω
600kΩ 100Ω
6MΩ 1kΩ
60MΩ 10kΩ ±(1.5% of rdg + 3 digits)
-- Overload protection: 250V DC or AC rms
6-6 Capacitance
Range
Accuracy
Resolution
9.999nF
±(3.0% of rdg + 10 digits)
1pF
99.99nF
±(2.5% of rdg + 5 digits)
10pF
999.9nF 100pF
9.999µF 1nF
99.99µF
±(5.0% of rdg + 10 digits)
10nF
999.9µF
±(10.0% of rdg + 20 digits)
100nF
9.999mF 1µF
99.99mF 10µF
-- Overload protection: 250V DC or AC rms
6-7 Frequency
Range Accuracy Resolution
9.999Hz
± (0.1% of rdg + 5 digits)
0.001Hz
99.99Hz 0.01Hz
999.9Hz 0.1Hz
9.999kHz 1Hz
99.99kHz 10Hz
999.9kHz 100Hz
9.999MHz 1kHz
-- Sensitivity: sine wave 0.6V rms (9.999MHz: 1.5V rms)
-- Overload protection: 250V DC or AC rms
6-8 Duty cycle
0.1%～99.9%: ± ( 2.0% of rdg + 2 digits ), Frequency lower than 10kHz
-- Sensitivity: sine wave 0.6V rms
-- Overload protection: 250V DC or AC rms
6-9 Temperature
Range Accuracy Resolution
℃
-20~150℃ ± ( 3℃+ 1digit )
1℃
150~1000℃ ± ( 3% of rdg + 2digits )
℉
-4~302℉ ± ( 5℉+ 2digits )
1℉
302~1832℉ ± ( 3% of rdg + 3digits )
-- NiCr-NiSi K-type sensor
-- Overload protection: 600mA/250V PPTC Resettable Fuse
6-10 Battery test
Range Accuracy Load current Resolution
±(5.0% of rdg + 5 digits)
Approx. 50mA 1mV
Approx. 10mA 10mV
-- Overload protection: 600mA/250V PPTC Resettable Fuse
6-11 Diode and Audible continuity test
Range Description Test Condition
Display read approximately
forward voltage of diode
Forward DC current
approx. 1.5mA
Reversed DC voltage
approx. 3.2V
Built-in buzzer sounds if
resistance is less than 50Ω
Open circuit voltage
approx. 1V
Overload protection: 250V DC or AC rms
6-12 Non Contact AC Voltage (NCV) detection
Test voltage range: 90V～1000V AC rms
The NCV red light and green light will light up alternately together with sound.
7. OPERATING INSTRUCTIONS
7-1 Attention before operation
7-1-1 Check battery. When the battery voltage drop below proper operation range, the “ ”
symbol will appear on the LCD display and the battery need to changed.
7-1-2 Pay attention to the “ ” besides the input jack which shows that the input voltage or
current should be within the specified value.
7-1-3 The range switch should be positioned to desired range for measurement before operation.
7-2 Measuring DC & AC Voltage
7-2-1 Connect the black test lead to COM jack and the red to VΩmA jack.
7-2-2 Set the rotary switch at the desired “V ” range position, it shows symbol for testing DC
voltage, if you want to test AC voltage, push “SELECT” button switch, then if you want to test AC
400mV, push “RANGE” to choose.
7-2-3 Connect test leads across the source or load under measurement.
7-2-4 You can get reading from LCD. The polarity of the red lead connection will be indicated
along with the DC voltage value.
NOTE:
1.“ ” means you can’t input the voltage more than 600V, it’s possible to show higher voltage, but
it may destroy the inner circuit or pose a shock.
2. Be cautious against shock when measuring high Voltage.
7-3 Measuring DC & AC Current
7-3-1 Connect the black test lead to COM jack and the red to the VΩmA jack for a maximum
600mA current , for a maximum 6A or 10A current, move the red lead to the 10A jack.
7-3-2 Set the rotary switch at the desired “uA ” & “mA ” & “A ” range position, it shows
symbol for testing DC current, if you want to test AC current, push “SELECT” button switch.
7-3-3 Connect test leads in series with the load under measurement.
7-3-4 You can get reading from LCD. The polarity of the red lead connection will be indicated
along with the DC current value.
NOTE:
1. When the value scale to be measured is unknown beforehand, set the range selector at the
highest position.
2. When only “OL” is displayed, it indicates over-range situation and the higher range has to be
selected.
3. “ ” means the socket mA’s maximum current is 600mA and 10A’s maximum current is 10A,
over 600mA current can be protected by the PPTC resettable fuse, but since 6A & 10A is not
fused.
4. On the 10A range, the measuring time should be less than 10 seconds to prevent precision
from affecting by circuit heating.
7-4 Measuring Resistance
7-4-1 Connect the black test lead to COM jack and the red to VΩmA jack.
7-4-2 Set the rotary switch at the desired “ ” range position.
7-4-3 Connect test leads across the resistance under measurement.
7-4-4 You can get reading from LCD.
NOTE: Max. input overload: 250V rms＜10sec
1. For measuring resistance above 1MΩ, the mete may take a few seconds to get stable reading.
2. When the input is not connected, i.e. at open circuit, the figure ‘OL’ will be displayed for the
over-range condition.
3. When checking in-circuit resistance, be sure the circuit under test has all power removed and
that all capacitors have been discharged fully.
7-5 Measuring Capacitance
7-5-1 Connect the black test lead to COM jack and the red to VΩmA jack.
7-5-2 Set the rotary switch at the desired “ ” range position, push “SELECT” to
choose Capacitance measurement.
7-5-3 Connect test leads across the capacitance under measurement.
7-5-4 You can get reading from LCD.
NOTE: Max. input overload: 250V rms＜10sec
1. Capacitors should be discharged before being tested.
2. When testing large capacitance, it will take longer time before the final indication (For
100uF~99.99mF range, it will take about 10 seconds).
3. When testing small capacitance (≤1uF), to assure the measurement accuracy, first press
"REL", then go on measuring.
7-6 Measuring Frequency & Duty cycle
7-6-1 Connect the black test lead to COM jack and the red to VΩmA jack.
7-6-2 Set the rotary switch at the desired “Hz” range position.
7-6-3 Push “Hz/%” key to choose Frequency or Duty cycle test.
7-6-4 Connect the probe across the source or load under measurement.
7-6-5 You can get reading from LCD.
7-7 Measuring Temperature
7-7-1 Connect the black banana plug of the sensor to COM jack and the red banana plug to the
VΩmA jack.
7-7-2 Set the rotary switch at the desired “ ” range position, push “SELECT” to choose ℃ or
℉ measurement.
7-7-3 Put the sensor probe into the temperature field under measurement.
7-7-4 You can get reading from LCD.
NOTE:
1. The accessory of the meter WRNM-010 type contact thermocouple limit temperature is 250 ℃
(300 ℃ shortly), please use special probe for test higher temperature.
2. Please don't change the thermocouple at will, otherwise we can't guarantee to measure
accuracy.
3. Please don’t importing the voltage in the temperature function.
7-8 Battery Testing
7-8-1 Connect the black test lead to COM jack and the red to VΩmA jack.
7-8-2 Set the rotary switch at the desired “ ” or “ ” range position to test 1.5V or 9V battery.
7-8-3 Connect test leads across the source or load under measurement.
7-8-4 You can get reading from LCD.
7-9 Diode & Audible continuity Testing
7-9-1 Connect the black test lead to COM jack and the red to VΩmA jack.
7-9-2 Set the rotary switch at the “ ” range position, push “SELECT” to choose Diode
or Audible continuity measurement.
7-9-3 On diode range, connect the test leads across the diode under measurement, display
shows the approx. forward voltage of this diode.
7-9-4 On Audible continuity range, connect the test leads to two point of circuit, if the resistance
is lower than approx. 50Ω, the buzzer sounds.
NOTE: Make sure the power is cut off and all capacitors need to be discharged under this
measurement.
7-10 Non Contact AC Voltage detection
7-10-1 Set the rotary switch at the desired “NCV” range position, the NCV green LED light will
light up.
7-10-2 Hold the Meter so that the mater’s top is vertically and horizontally centered and contacting
the conductor, when the live voltage ≥90V AC rms, the NCV red LED light and green LED
light will light up alternately together with sound.
NOTE:
1. Even without LED indication, the voltage may still exist. Do not rely on non-contact voltage
detector to determine the presence of voltage wire. Detection operation may be subject to socket
design, insulation thickness and different type and other factors.
2. When the meter input terminals presence voltage, due to the influence of presence voltage,
voltage sensing indicator may also be bright.
3. Keep the meter away from electrical noise sources during the tests, i.e., florescent lights,
dimmable lights, motors, etc.. These sources can trigger Non-Contact AC Voltage detection
function and invalidate the test.
8. Battery replacement
8-1 When the battery voltage drop below proper operation range the " " symbol will appear on
the LCD display and the battery need to changed.
8-2 Before changing the battery, set the selector switch to “OFF” position and remove the test
leads from the terminals. Open the cover of the battery cabinet by a screwdriver.
8-3 Replace the old battery with the same type battery (AA R6P 1.5V×2).
8-4 Close the cover of the battery cabinet and fasten the screw.
9. Fuse replacement
9-1 This meter is provided with a 600mA/250V PPTC resettable fuse to protect the battery test,
temperature test and the current measuring circuits which measure up to 600mA, with a
10A/250V fuse to protect the 10A range. The PPTC resettable fuse can recover to the initial
state without any manual operation.
9-2 Ensure the meter is not connected to any external circuit, set the selector switch to “OFF”
position and remove the test leads from the terminals. Open the cover of the battery cabinet by
a screwdriver.
9-3 Replace the old fuse with the same type and rating: 6×30mm 10A/250V fuse.
9-4 Close the cover of the battery cabinet and fasten the screw.
10. Maintenance
10-1 You must replace the test leads if the lead is exposed, and should adopt the leads with the
same specifications as origin.
10-2 Use only moist fabric or small amount of detergent but not chemical solution for cleaning.
10-3 Do not use the meter before the back cover is properly closed and screw secured. Upon
any abnormality, stop operation immediately and send the meter for maintenance.
10-4 Please take out the battery when not using for a long time.
11. Accessories
[1] Test Leads: electric rating 1000V 10A
[2] “K” type thermocouple sensor probe
[3] Operator’s Manual
Above picture and content just for your reference. Please be subject to the
actual products if anything different or updated. Please pardon for not
informing in advance.
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