Mastech MS2030 User manual

1.Introduction
WARNING
Make sure to read and follow all safety procedures to avoid
electric shock and/or injury.
The MS2030 is a safe, reliable, yet small handheld 3 ½ digit
digital clamp meter. Capable of measuring AC current, AC/DC
voltage,
resistance, diode’s forward voltage drop, and
continuity, it’s ideal for both home users and
professionals.
2. Safety Instructions
The MS2030 meets EN61010-1 safety requirements for electrical
testing instruments and handheld digital multimeters. It’s
designed to comply with EN61010-1 with a CAT III 600V safety
rating and pollution degree of 2.
All safety guidelines outlined should be followed otherwise
the protection provided by the instrument may be impaired.
Warning symbols in the manual alert users of potential
dangerous situations.
Precautions are to prevent the user from damaging the
instrument or the test object.
2.1 Precautions
To avoid possible electric shock, personal injury or damage to the
meter, please observe the following:
1. Before using the meter, check the meter for damage during
transport.
2. Check the test leads for damage to the insulation or wires
before use.
3. Ensure the meter works properly by testing a known voltage
first. If not working properly, have the meter serviced before
using.
4. Never exceed the protection limit values indicated
in the specifications for each range of measurement.
5. Always use caution when making voltage measurements
above 60V dc or 30V ac rms.
6. Make sure to use the correct input jack, function and range
when measuring.
7. Do not place the meter in any environment with dust, explosive
gas or vapor.
8. Always keep fingers behind the probe barriers.
9. Connect the common test lead first, then the hot lead.
Disconnect in reverse order.
10. Turn off power and discharge capacitors before measuring
resistance, diodes or continuity.
11. Failure to follow safety guidelines may prevent the meter’s
built in protection from working properly.
12. To avoid damage or incorrect readings, check for AC voltage
present before making DC voltage measurements.
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13. Do not use the meter with the battery cover not securely in
place.
14. When the “ “ symbol appears, replace the batteries to
avoid incorrect readings
15. Before opening the case, always disconnect test
leads from all energized circuits.
16. Only use the test leads provided with the meter. Replace
only with similar leads with matching specifications.
17. Do not touch input jacks during measurement to avoid electric
shock.
18. Before switching functions, remove test leads from an circuit.
2.2 Safety Symbols
Note – Important safety information; refer to the instruction manual.
Hazardous voltage may be present.
Caution when testing on live conductors.
Double insulation protection class II
CAT III This meter is in accordance with EN61010-1 standard overvoltage
(insulation) category III, pollution degree 2.
Complies with US and Canadian safety standards
Complies with European (EU) safety standards
Ground.
3. Description
3.1 Front Panel
1.
Current Clamp
For measuring AC current.
2. Safety barrier
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Helps to keep hands from touching conductors while measuring
current.
3. Rotary Switch
Used to select function and range.
4. Display
Max. display value: 1999
5. Input Jack
Connection for the live (red) test lead for voltage, resistance,
capacitance, diodes and continuity.
6. COM Jack
Connection for the common (black) test lead.
7. Hold Button
Press the “HOLD” button and the display will keep the reading
on the screen. The “ ” symbol appears on the display.
Press the “HOLD” button again to return the display to normal.
8. Clamp Trigger
Press the trigger to open the clamp jaw; release to close.
3.2 Display
Symbol
Description
Low Battery
V
Volts (Voltage)
A
Amps (Current)
kΩ
kilohms (Resistance)
Continuity
Diode
Display Hold
Polarity Indicator (Negative)
4. Using the Meter
4.1 Data Hold
The data hold function will keep the current reading on the
display. To activate data hold:
1. Press the “HOLD” button and the reading will be held on the
display. The “ ” symbol appears.
2. Press “HOLD” again to release the hold.
4.2 DC Voltage
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1. Insert the red test lead in the “INPUT” jack and the black lead
in the “COM” jack.
2. Move the rotary switch to the “ ”position. Connect the test
leads across the circuit or load to be measured.
3. Read measured voltage on the display.
CAUTION
△ Use extra caution when measuring high
voltages to avoid electric shock or damage
-
WARNING
Do not attempt to measure voltages above 600V DC to
prevent injury or damage to the meter.
4.3 AC Voltage
1. Insert the red test lead in the “INPUT” jack and the black lead
in the “COM” jack.
2. Move the rotary switch to the “ ” position. Connect the test
leads across the circuit or load to be measured.
3. Read measured voltage on the display.
CAUTION
△Use extra caution when measuring high voltages to
avoid electric shock or damage.
WARNING
Do not attempt to measure voltages above 600V AC to
prevent injury or damage to the meter.
4.4 AC Current
1. Move the rotary switch to the position with the
proper range.
2. Press the trigger to open the clamp and insert one conductor
inside the jaws. Only clamp one conductor; multiple conductors
with different current directions will cancel out readings.
3. Read measured current on the display.
CAUTION
△ If the current range is not known before hand,
set the range to the highest range and adjust
down as necessary.
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△

When measuring bare wires, use extra caution to
avoid electric shock.
4.5 Resistance
1. Turn off all power and discharge capacitors on the circuit under
test.
2. Insert the red test lead in the “INPUT” jack and the black lead
in the “COM” jack.
3. Move the rotary switch to the position. Connect the
test leads across the circuit to be measured.
4. Read measured resistance on the display.
Tips for measuring resistance:
- Sometimes the resistor value and measured resistance differ.
This is due to the meter’s output test current goes through all
possible paths between leads.
- For low resistance measurements, short the test leads and
record the resistance displayed. Then connect to the circuit and
subtract the recorded resistance from the measurement for the
most accurate results.
- When leads are disconnected or measurement is out of range,
only “1” is displayed.
WARNING
To avoid injury or damage to the meter, make sure to turn off
all power and discharge all capacitors before measuring
resistance.
4.6 Continuity
1. Turn off all power and discharge capacitors on the circuit under
test.
2. Insert the red test lead in the “INPUT” jack and the black lead
in the “COM” jack.
3. Move the rotary switch to the position.
Connect the test leads across the circuit to be measured.
4. Read measured resistance on the display. If the measured
resistance is less than 50Ω, the meter’s buzzer will sound.
WARNING
To avoid injury or damage to the meter, make sure to turn off
all power and discharge all capacitors before measuring
continuity.
4.7 Diode Test
1. Turn off all power and discharge capacitors on the circuit under
test.
2. Insert the red test lead in the “INPUT” jack and the black lead
in the “COM” jack.
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3. Move the rotary switch to the position. Connect the test
leads across the circuit to be measured.
measured resistance is less than 50Ω, the meter’s buzzer will
sound.
WARNING
To avoid injury or damage to the meter, make sure to turn off
all power and discharge all capacitors before measuring
continuity.
4.7 Diode Test
1. Turn off all power and discharge capacitors on the circuit under
test.
2. Insert the red test lead in the “INPUT” jack and the black lead
in the “COM” jack.
3. Move the rotary switch to the position. Connect the test
leads across the circuit to be measured.
Display: 3 ½ digit LCD (max. display: 1999)
Over-range indication: display only shows “1”
Low battery indication: when battery voltage drops below
operating voltage, “ ” symbol appears on the display
Polarity indication: automatically displays “-“
Power: 3x 1.5V AAA batteries
Dimensions: 198mm*79mm*38mm
Weight: approx. 260g (with battery)
Max. jaw opening: 26mm
5.2 Technical Specifications
Accuracy: ±(% of reading + digits), 1 year warranty.
Ambient temp.: 18°C~28°C, humidity: <75%.
Temperature coefficient: 0.1% accuracy/°C
5.2.1 DC Voltage
Range
Resolution
Accuracy
600V
1V
±（1.0% of reading + 3 digits）
- Input impedance: 10M
- Overload protection: 600V DC or AC rms
- Max. input voltage: 600V DC
5.2.2 AC Voltage
Range
Resolution
Accuracy
600V
1V
±（1.5% of reading + 10 digits）
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- Input impedance: 10M
- Overload protection: 600V DC or AC rms
- Max. input voltage: 600V AC rms
For AC current measurement, keep
the conductor in the center of the
clamp; otherwise the reading can
deviate as much as 1.5% of actual
measurement.

- Frequency range: 50Hz~60Hz
- Response: Average; calibrated to rms sine wave
5.2.3 AC Current
Range
Resolution
Accuracy
2A
0.001A
±（2.0% of reading + 10 digits）
20A
0.01A
400A
1A
±(2.0 of reading+5digits)
- Frequency range: 50Hz~60Hz
- Max. input current: up to 120% of full scale for no more than 60
seconds.
- Response: Average; calibrated to rms sine wave
5.2.4 Resistance
Range
Resolution
Accuracy
2kΩ
1Ω
±(1.0% of reading + 5 digits)
- Open circuit voltage: approx. 2.0V
- Overload protection: 250V DC or AC rms
5.2.5 Diode Test
Range
Resolution
Function
0.001V
Shows approx. forward
biased voltage drop
- Forward DC current: approx. 1mA
- Reverse DC voltage: approx. 3.2V
- Overload protection: 250V DC or AC rms
5.2.6 Continuity
Range
Function
If the measured resistance is less than
50Ω, the meter’s buzzer will sound.
- Open circuit voltage: approx. 3.2V
- Overload protection: 250V DC or AC rms
6.Maintenance
6.1 General Maintenance
This section provides basic maintenance principles, including
cleaning and battery replacement. Do not attempt to do any
repair or calibration to the meter unless you are experienced
maintenance personnel.
WARNING
Remove test leads from meter before opening the battery
cover to avoid damage or injury.
Use a damp cloth and a small amount of detergent to clean the
meter regularly. Do not use abrasives or chemical solvents.
Dirty or wet input jacks can affect readings.
To clean the input jacks:
1. Turn off meter and remove test leads.
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2. Wipe any debris off input jacks.
3. Use a cotton swab with a cleaner/lubricant (i.e. WD-40) to
clean jacks.
4. Use a new swab for each jack to prevent cross contamination.
6.2 Replacing the Batteries
WARNING
To avoid false reading that can lead to injury or
damage to the meter, replace the battery as
soon as the low battery symbol “ ” appears.
Remove test leads and disconnect from all
circuits before opening the battery cover.
To replace the batteries:
1. Turn off the meter and remove test leads.
2. Unscrew the battery cover.
3. Replace the used batteries with new ones. Be sure to
observe polarity when replacing batteries.
4. Replace battery cover and tighten before use.
6.3 Replacing Test Leads
WARNING
When replacing test leads, only use similar leads or leads
with same specs as those provided. Lead specs: 600V, 10A
Replace test leads if leads become damaged or worn.
7. Accessories
-8- HCYB20150206
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User’s manual
Test leads
Case
AAA batteries (1.5V)
1 piece
1 pair
1 piece
3 pieces