Mastech MS2030A User manual

MS2030A
AC Digital Clamp Meter
User’s Manual
AUTO RS232
A
V
COM INPUT
600V
CAT III
600V
CAT III
MAX
200A
200A
20A
2A
600
V
600
V
NCV
HOLD
AC CLAMP METER
MS2030A
CAT III
600 V

CONTENTS CONTENTS
2.Safety Information.................................1
2.1 Precautions ...........................................1
2.2 Safety Symbols..................................3
3. Description...........................................4
3.1 Front Panel .........................................4
3.2 Display .............................................6
4. Using the Meter .................................7
4.1 Data Hold ..........................................7
4.2 DC Voltage ........................................7
4.3 AC Voltage ........................................7
1.Introduction ..........................................1 4.4 AC Current........................................7
5. Specifications .................................11
5.2 Technical Specifications....................12
5.1 General Specifications......................11
6. Maintenance....................................14
4.5 Resistance........................................8
4.6 Continuity .........................................9
4.7 Diode Test ........................................9
6.2 Replacing the Batteries.....................15
6.1 General Maintenance ...........................14
6.3 Replacing Test Leads........................15
7. Accessories ....................................15
4.8 NCV (Non-Contact Voltage) ...................10

01 02
1.Introduction
Make sure to read and follow all safety procedures to
avoid electric shock and/or injury. If the equipment
is used in a manner not specified by the manufacturer,
the protection provided by the equipment may be
impaired.
WARNING
The meter is a safe, reliable, yet small handheld 3 ½
digital clamp meter. Capable of measuring AC current,
AC/DC voltage, resistance and continuity, it’s ideal for
both home users and professionals.
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.
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.Safety Instructions
The meter is designed and manufactured according
to safety requirements of EN 61010-1:2010,
EN 61010-2-032:2012, EN 61010-2-033:2012 on electronic
measuring instrument and hand held digital multipurpose
meter. And conforms to UL STD.61010-1,61010-2-032,
61010-2-033, Certified to CSA STD.C22.2 NO.61010-1,
61010-2-032, 61010-2-033.The product meets with the
requirements of 600V CAT III and pollution degree 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.

AUTO RS232
A
V
COM INPUT
600V
CAT III
600V
CAT III
MAX
200A
200A
20A
2A
600
V
600
V
NCV
HOLD
AC CLAMP METER
MS2030A
03 04
3. Description
3.1 Front Panel
1
2
3
4
5
6
7
8
2.2 Safety Symbols
Note-Important safety information,
refer to the instruction manual.
Conforms to UL STD. 61010-1, 61010-2-032,
61010-2-033; Certified to CSA STD. C22.2
NO. 61010-1, 61010-2-032, 61010-2-033
Complies with European (EU) safety
standards
Earth (ground) TERMINAL
Caution when testing on live conductors.
Equipment protected throughout by double
insulation or reinforced insulation.
Application around and removal from
UNINSULATED HAZARDOUS LIVE
conductors is permitted.
Direct current
Alternating current
10
9
CAT III: MEASUREMENT CATEGORY III is applicable to
test and measuring circuits connected to the distribution
part of the building's low-voltage MAINS installation.
CAT II: MEASUREMENT CATEGORY II is applicable to test
and measuring circuits connected directly to utilization points
(socket outlets and similar points) of the low-voltage MAINS
installation.
CAT IV: MEASUREMENT CATEGORY IV is applicable to
test and measuring circuits connected at the source of the
building’s low-voltage MAINS installation.

05 06
1. Current Clamp
For measuring AC current.
2. Safety barrier
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, 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
A
V
V
A
kΩ
Symbol Description
Low Battery
Volts (Voltage)
Amps (Current)
kilohms (Resistance)
Continuity
Diode
Display Hold
Polarity Indicator (Negative)
10. NCV Button
Hold the “NCV” button to activate the non-contact
voltage mode.
Hold the button to turn on the backlight.
The worklight will turn on as well when the rotary
switch is in one of the current positions. Hold down
the button again to turn off the backlight.
9.Backlight

07 08
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
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.
1,Do not attempt to measure voltages above 600V
DC and AC to prevent injury or damage to the
meter.
2,Use extra caution when measuring high voltages
to avoid electric shock or damage.
WARNING
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.
1.If the current range is not known before hand,
set the range to the highest range and adjust
down as necessary.
2.When measuring bare wires, use extra caution
to avoid electric shock.
CAUTION
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.
V
600
V
600
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.
To avoid injury or damage to the meter, make sure
to turn off all power and discharge all capacitors
before measuring resistance.
WARNING
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.
4.4 AC Current
1. Move the rotary switch to the position with the
proper range.

09 10
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 70Ω, the meter’s
buzzer will sound.
To avoid injury or damage to the meter, make sure
to turn off all power and discharge all capacitors
before measuring continuity.
WARNING
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.
4.Read the measured forward biased voltage drop on the
display. If the leads are reversed, only “1” is displayed.
To avoid injury or damage to the meter, make sure
to turn off all power and discharge all capacitors
before measuring diodes.
WARNING
Note:
1. Even if no indication is given, voltage may still be
present. Do not rely solely on NCV detection to
determine the presence of voltage.
2. When measuring AC/DC voltage, the NCV indicator
may flash due to induced voltage.
3. External power sources/interference may trigger the
NCV indicator.
4.8 NCV (Non-Contact Voltage)
1. Move the rotary switch to any position.
2. Hold the “NCV” button and move the tip of the
clamp close to the test object. If the detected voltage
is >110V AC, the meter will beep and the NCV indicator
will flash.

11 12
5. Specifications
5.1 General Specifications
• Safety rating: CAT III 600V, pollution degree 2
• Max. operating altitude: 2000m
• Operating temperature: 0~40°C, <80% RH
• Storage temperature: -10~60°C, <70% RH
(battery removed)
• Temperature coefficient: 0.1 accuracy/°C
(<18°C or >28°C)
• Max. voltage between terminals and
ground: 600V DC or AC rms
• Sample rate: approx. 3 times/sec
• 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: 198mmX79mmX38mm
• Weight: approx. 194g (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
(0°C~18°C or 28°C~40°C)
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.
5.2.1 DC Voltage
- Input impedance: 10M
- Overload protection: 600V DC or AC rms
- Max. input voltage: 600V DC
600V 1V ±(1.0% reading +3 dgt)
Range Resolution Accuracy
mark
mark
mark
conductor

13 14
2A 0.001A
Range Resolution Accuracy
20A 0.01A ±(2.0% reading +10 dgt)
200A 1A ±(2.0% reading +5 dgt)
2kΩ1Ω
Range Resolution Accuracy
±(1.0% reading +5 dgt)
0.001V
Range Resolution Function
Shows approx. forward
biased voltage drop
Range Function
If the measured resistance is less than 70Ω,
the meter’s buzzer will sound.
5.2.3 AC Current
- 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
- Open circuit voltage: approx. 2.0V
- Overload protection: 250V DC or AC rms
5.2.5 Diode Test
- Forward DC current: approx. 1mA
- Reverse DC voltage: approx. 3.5V
- Overload protection: 250V DC or AC rms
5.2.6 Continuity
- Open circuit voltage: approx. 2.7V
- 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.
Remove test leads from meter before opening the
battery cover to avoid damage or injury.
WARNING
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.
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.
Protection impairment if used in a manner not
specified by the manufacturer.
WARNING
5.2.2 AC Voltage
- Input impedance: 10M
- Overload protection: 600V DC or AC rms
- Max. input voltage: 600V AC rms
- Frequency range: 50Hz~60Hz
- Response: Average; calibrated to rms sine wave
600V 1V ±(1.5% reading +10 dgt)
Range Resolution Accuracy

15 00-05-3290
7. Accessories
User’s manual
Test leads
Carry case
AAA batteries (1.5V)
1
2
3
4
1 piece
1 pair
1 piece
3 pieces
Replace test leads if leads become damaged or worn.
Use meet EN 61010-031 standard, rated CAT III 600V, or
better test leads.
WARNING
6.2 Replacing The Batteries
WARNING
To avoid electric shock, make sure that the test
leads have been clearly move away from the
circuit under measurement before opening the
battery cover of the meter.
5.1.1 If the sign “ ” appears, it means that the
batteries should be replaced.
5.1.2 Loosen the fixing screw of the battery cover and
remove it.
5.1.3 Replace the exhausted batteries with new ones.
5.1.4 Put the battery cover back and fix it again to its
origin form.
Note:
Do not reverse the polarity of the batteries.
WARNING
Do not mix old and new batteries. Do not mix
alkaline, standard (carbon-zinc), or rechargeable
(ni-cad, ni-mh, etc) batteries.
6.3 Replacing Test Leads