Please read these instructions carefully and retain them for future use.
DIGITAL MULTI-METER
WITH AUTOMATIC RANGING
OWNER’S MANUAL
Item Number W2971
WARNING
It is the owner and/or operators’ responsibility to study all WARNINGS, operating,
and maintenance instructions contained on the product label and instruction manual
prior to operation of this product. The owner/operator shall retain product instructions
for future reference.
The owner and/or operator are responsible for maintenance, maintaining all decals
or warning labels and while in use, maintaining the unit in good working order. If the
owner and/or operator are not fluent in English, the product warnings and
instructions shall be read and discussed with the operators’ native language by the
purchaser/owner or his designee. Make sure that the operator comprehends its
contents. Safety information shall be emphasized and understood prior to usage.
The product shall be inspected per the operating instructions.
Users of this product must fully understand these instructions. Each person operating
this product must also be of sound mind and body and must not be under the
influence of any substance that might impair their vision, dexterity or judgment.
Protect yourself and others by observing all safety information.
Failure to comply with instructions could result in personal injury and/or property damage!
This manual provides all safety information, operation instruction, specifications and
maintenance for the meter, which is compact, handheld, and battery operated.
This
instrument performs AC/DC voltage, AC/DC Current, Resistance, Audible Continuity,
Diode and Cable test, it is a 3 1/2 digits, 1999 counts auto ranging DMM.
It has the
functions of polarity indication, data hold, back light, over range indication and
automatic power-off. It can be operated easily and is an ideal instrument tool.
This
digital multimeter has been designed according to EN61010-1 oncoming electronic
measuring instruments with an over voltage category (CAT II 600V) and Pollution
degree 2.
SAFETY INFORMATION
WARNING:
To avoid possible electric shock or personal injury, and to avoid possible damage to
the Meter or to the equipment under test, adhere to the following rules:
1.
Before using the Meter inspect the case. Do not use the Meter if it is damaged
or the case (or part of the case) is removed. Look for cracks or missing plastic. Pay
attention to the insulation around the connectors.
2.
Inspect the test leads for damaged insulation or exposed metal. Check the test
leads for continuity.
3. Do not apply more than the rated voltage, as marked on the Meter, between the
terminals or between any terminal and grounding.
4. The rotary switch should be placed in the right position and no any changeover of
range shall be made during measurement is conducted to prevent damage of the Meter.
5. When the Meter working at an effective voltage over 60V in DC or 30V rms in AC,
special care should be taken for there is danger of electric shock.
6. Use the proper terminals, function, and range for your measurements.
7. Do not use or store the Meter in an environment of high temperature, humidity,
explosive, inflammable and strong magnetic field. The performance of the Meter may
deteriorate after dampened.
8. When using the test leads, keep your fingers behind the finger guards.
9. Replace the battery as soon as the battery indicator appears. With a low
battery, the Meter might produce false readings that can lead to electric shock and
personal injury.
10. Remove the connection between the testing leads and the circuit being tested,
and turn the Meter power off before opening the Meter case.
11. When servicing the Meter, use only the same model number or identical electrical
specifications replacement parts.
12.
The internal circuit of the Meter shall not be altered at will to avoid damage of the
Meter and any accident.
13.
Soft cloth and mild detergent should be used to clean the surface of the Meter
when servicing. No abrasive and solvent should be used to prevent the surface of the
Meter from corrosion, damage and accident.
14.
The Meter is suitable for indoor use.
15.
Turn the Meter power off when it is not in use and take out the battery when not
using for a long time. Constantly check the battery as it may leak when it has been
using for some time, replace the battery as soon as leaking appears. A leaking
battery will damage the Meter.
Electrical Symbols
DC (Direct Current)
AC (Alternating Current)
DC or AC
Low battery
Warning. Refer to the manual
Earth ground
Dangerous voltage maybe present
Fuse
Diode
Continuity test
AUTO
Auto
range
Double
insulated
Display
: LCD, 1999 counts updates 2/sec
LCD size
: 46 x 24mm
Polarity Indication
: “-” displayed automatically
Over-range Indication
: “OL” displayed
Low Battery Indication
: “ ” displayed
Range select
: auto or manual
Operation Temperature
: 0°C to 40°C, less than 80%RH
Storage Temperature
: -10°C to 50°C, less than 85%RH
Battery Type
: 1.5V x 2, AAA size
Dimension (H×W×D)
: 150×70×22mm
Weight
:
Approx.
150g
GENERAL CHARACTERISTICS
+ -
SPECIFICATIONS
Accuracy is guaranteed for 1 year 23°C±5°C less than 80%RH
1. DC VOLTAGE (Auto ranging)
Range Resolution
Accuracy
200mV 0.1mV
±(0.8% of rdg + 5dgts)
2V
1mV
20V
10mV
±(1% of rdg + 2dgts)
200V
100mV
600V
1V
±(1.2% of rdg + 5dgts)
Input Impedance: 10MΩ
Overload Protection: 600V DC/AC rms
Max. Input voltage: 600V DC
2. DC CURRENT
Range Resolution
Accuracy
200µA 0.1µA
2000µA 1µA
±(0.8% of rdg + 5dgts)
20mA
10µA
200mA 100µA
10A
100mA
±(2.0% of rdg + 5dgts)
Overload Protection: F0.5A/600V fuse
Max. Input Current: 500mA
Voltage Drop: 200µA and 20mA ranges: 20mV
2000µA and 200mA ranges: 200mV
3. AC CURRENT
Range Resolution
Accuracy
200µA
0.1µA
2000µA 1µA
±(1.0% of rdg + 5dgts)
20mA
10µA
200mA 100µA
10A
100mA
±(3.0% of rdg + 5dgts)
Overload Protection: F0.5A/600V fuse
Max. Input Current: 500mA
Voltage Drop: 200µA and 20mA ranges: 20mV
2000µA and 200mA ranges: 200mV
Frequency Range: 40Hz ~ 400Hz
Response: Average, calibrated in rms of sine wave
4. AC VOLTAGE (Auto ranging)
Range Resolution
Accuracy
2V
1mV
20V
10mV
±(1.2% of rdg + 3dgts)
200V
100mV
600V
1V
±(1.2% of rdg + 8dgts)
Input Impedance: 10MΩ
Frequency Range: 40Hz ~ 400Hz
Overload Protection: 600V DC/AC rms
Response: Average, calibrated in rms of sine wave
Max. Input voltage: 600V AC rms
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