Mastech MS2030B User manual

MS2030B
AC Digital Clamp Meter
User’s Manual
AUTO
RS232
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 .............................................7
4. Using the Meter .................................8
4.1 Data Hold ..........................................8
4.2 Manual Range ...................................8
4.3 Auto Power Off ..................................8
1.Introduction ..........................................1
4.4 DC Voltage.........................................8
5. Specifications ..................................13
5.2 Technical Specifications.....................14
5.1 General Specifications.......................13
6. Maintenance.....................................18
4.5 AC Voltage.........................................9
4.6 AC Current ........................................9
4.7 Resistance .......................................10
6.2 Replacing the Batteries......................19
6.1 General Maintenance ............................18
6.3 Replacing Test Leads.........................19
7. Accessories .....................................20
4.9 Continuity...........................................11
4.10 Capacitance......................................12
4.11 Temperature .....................................12
4.13 NCV (Non-Contact Voltage) ..................13
4.8 Diode Test...........................................11
4.12 Frequency/Duty Cycle ........................12

01 02
1.Introduction
The meter is a safe, reliable, yet small handheld 3 ¾ digital
clamp meter. Capable of measuring AC current, AC/DC
voltage, resistance, capacitance, temperature, frequency/
duty cycle, NCV, diode’s forward voltage drop, and continuity,
it’s ideal for both home users and professionals.
2.1 Precautions
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.
To avoid possible electric shock, personal injury or
damage to the meter, please observe the following:
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.
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.
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

AUTO
RS232
03 04
2.2 Safety Symbols 3. Description
3.1 Front Panel
1
2
3
4
5
6
7
8
9
10
11
12
13
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, possibility of electric shock
Equipment protected throughout by double
insulation or reinforced insulation.
Application around and removal from UNINSULATED
HAZARDOUS LIVE conductors is permitted.
Direct current
Alternating current
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.
/
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.Press the
/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.
4.Backlight/Hold button
5. NCV Button
Hold the “NCV” button to activate the non-contact
voltage mode.
6. Frequency/Duty Cycle Button
Press the “Hz%” button while in voltage mode to
switch to frequency mode. Press the button again
to switch to duty cycle mode. Press the button a
third time to return to voltage mode.
7. Display
ax. display value: 3999
8. Input Jack
Connection for the live (red) test lead for voltage,
resistance, capacitance, diodes and continuity.
9. COM Jack
Connection for the common (black) test lead.
10. Range Button
Press the “RAN” button to switch to manual range.
Each press increases the range and returns to the
lowest range when pressed in the highest range.
Hold the button to return to auto-range.
11. Select Button
Press “SEL” to switch between AC/DC voltage and
between functions in the multi-function position.
12. Clamp Trigger
Press the trigger to open the clamp jaw; release
to close.
13. Worklight
When the rotary switch is in one of the current
positions and the backlight is turned on, the worklight
will also turn on.

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 “ / ” button and the reading will be held
on the display. The“ / ”symbol appears.
2. Press “ / ” again to release the hold.
nF, µF, mF
Ω, kΩ, MΩ
Symbol Description
Celsius/Fahrenheit
Farads (capacitance)
Ohms (resistance)
Diode
Display Hold
Polarity Indicator (Negative)
Auto-range
AUTO
Low Battery
°C°F
% Percentage (duty cycle)
Hz, kHz Hertz (frequency)
MV,V Volts (Voltage)
µA, mA,A Amps (Current)
Continuity
4.2 Manual Range
The meter’s default range is “AUTO.” To select manual
range, press “RAN” to enter manual range. Each press
of the button increases the range and returns to the
lowest range when pressed at the highest range. Hold
the button to return to auto-range. Manual range cannot
be used in 40A and 4A current modes, frequency, duty
cycle, diode, continuity, or temperature modes
4.3 Auto Power Off
If the meter is not used for approx. 30 min., the meter will
automatically turn itself off to conserve battery power. To turn
the meter back on after auto off, press the “SEL” button.
07
4.4 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.
The default mode is DC voltage. Connect the test
leads across the circuit or load to be measured.
3. Read measured voltage on the display.
Use extra caution when measuring high voltages
to avoid electric shock or damage.
CAUTION
Do not attempt to measure voltages above
600V DC to prevent injury or damage to the meter.
WARNING
V
3.2 Display
AUTO RS232
Direct Current
Alternating Current

09 10
4.5 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.
Press “SEL” to switch to AC voltage. Connect the test
leads across the circuit or load to be measured.
3. Read measured voltage on the display.
Use extra caution when measuring high voltages
to avoid electric shock or damage.
CAUTION
Do not attempt to measure voltages above
600V AC to prevent injury or damage to the meter.
WARNING
4.6 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.
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
- When leads are disconnected or measurement is out
of range, “OL” is displayed.
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
4.7 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.
Ω
V

11 12
To avoid injury or damage to the meter, make sure
to turn off all power and discharge all capacitors
before measuring diodes.
WARNING
4.9 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. Press
“SEL” twice to switch to continuity mode. Connect
the test leads across the circuit to be measured.
4. Read measured resistance on the display. If the
measured resistance is less than 60Ω, 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
4.10 Capacitance
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. Press
“SEL” three times to switch to capacitance mode.
Connect the test leads across the circuit to be
measured.
4.Read measured capacitance on the display.
4.11 Temperature
1. Move the rotary switch to the “°C” or “°F” position.
The display will show the current ambient temperature.
2. Connect the red end of the included type-k
thermocouple to the “INPUT” jack and the black end
to the “COM” jack.
3. Touch the tip of the thermocouple to the object to be
tested.
4. Read measured resistance on the display.
4.12 Frequency/Duty Cycle
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. While in
voltage mode, press “Hz%” to switch to frequency
mode. Connect the test leads across the circuit to
be measured.
3. Read measured resistance on the display.
4. Press “Hz%” again to switch to duty cycle mode.
Connect the test leads across the circuit to be
measured.
5. Read measured duty cycle on the display.
6. Press “Hz%” to return to voltage mode.
Ω
Ω
Ω
4.8 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. Press
“SEL” to switch to diode mode. 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.
Ω

13 14
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.
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 ¾ digit LCD (max. display: 3999)
• Over-range indication: display only shows “OL”
• 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. 196g (with battery)
• Max. jaw opening: 26mm
±(0.8% of reading+3 digits)
5.2 Technical Specifications
Accuracy: ±(% of reading + digits), 1 year warranty.
Ambient temp: 18°C~28°C, humidity: <75%.
Temperature coefficient: 0.1accuracy/°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
400mV 0.1mV
Range Resolution Accuracy
mark
mark
mark
conductor
600V 1V
4V 1mV
40V 10mV
400V 0.1V
4.13 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.

15 16
- Input impedance: 10MΩ
- Overload protection: 600V DC or AC rms
- Max. input voltage: 600V DC
±(1.0% of reading+5 digits)
- Frequency range: 40Hz~400Hz
- Response: Average; calibrated to rms sine wave
5.2.2 AC Voltage
400mV 0.1mV
Range Resolution Accuracy
600V 1V
4V 1mV
40V 10mV
400V 0.1V
±(2.5% of reading+5 digits)
5.2.3 AC Current
4A 0.001A
Range Resolution Accuracy
40A 0.01A
400A 0.1A
600A 1A
- 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
- Open circuit voltage: approx. 0.4V
- Overload protection: 250V DC or AC rms
5.2.4 Resistance
±(1.0% of reading+5 digits)
400Ω 0.1Ω
Range Resolution Accuracy
4KΩ 1Ω
40KΩ 10Ω
400KΩ 0.1KΩ
4MΩ 1KΩ
40MΩ 10KΩ ±(2.0% of reading+5 digits)
Range Resolution Accuracy
5.2.5 Diode Test
0.001V Shows approx.
forward biased voltage drop
- Forward DC current: approx. 1mA
- Reverse DC voltage: approx. 1.5V
- Overload protection: 250V DC or AC rms
Range Function
5.2.6 Continuity
- Open circuit voltage: approx. 0.4V
- Overload protection: 250V DC or AC rms
If the measured resistance is less
than 60Ω,the meter ’s buzzer will sound.

17 18
±(4.0% of reading+5 digits)
5.0nF 0.001nF
Range Resolution Accuracy
50µF 0.01µF
50nF 0.01nF
500nF 0.1nF
5.0µF 1nF
5.2.7 Capacitance
100µF 0.1µF
- Overload protection: 250V DC or AC rms
±(1.0% of reading+5 digits)
50Hz 0.01Hz
Range Resolution Accuracy
500Hz 0.1Hz
5kHz 1Hz
10kHz 0.01kHz
5.2.8 Frequency (V position)
- Measuring range: 10~100kHz.
- Input voltage range: ≥0.2V AC rms. (measured
frequency will increase as the input voltage increases
- Overload protection: 600V DC or AC rms
0.1%~99.9%
Range Resolution Accuracy
5.2.9 Duty Cycle
0.1% ±2.0%
±(3% of reading+3 digits)
-20~1000°C 1°C
Range Resolution Accuracy
-4~1832°F 1°F
5.2.10 Temperature
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.
±(3.0% of reading+3 digits)
Protection impairment if used in a manner not
specified by the manufacturer.
WARNING

19 00-05-3293
User’s manual 1 piece
Test leads 1 pair
Type-K Thermocouple 1 piece
Carry case 1 piece
AAA batteries (1.5V) 3 pieces
7. Accessories
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