Mastech MS2102 User manual

MINI CLAMP METER
V
OFF
COM V
AC/DC RANGE
HOLD
MASTECH
Mk
Hz
AC
DC
V
A
0 10 20 30 40
AUTO
CLAMP METER
MAX 400A
A
ZERO
CAT II
MAX 600V
ZERO
Auto Range
MS2102
AC/DC
CLAMP METER
MS2102
1. GENERAL INSTRUCTIONS
1.1 Precaution safety measures
1.1.1 Preliminary
1.1.2 During use
1.1.3 Symbols
1.1.4 Instructions
1.2 Maintenance and Cleaning
1.3 Battery replacement
2. DESCRIPTION
2.1 Instrument Familiarization
2.2 LCD Display
2.3 Key pad
2.4 Transformer jaws
2.5 Terminals
3. TECHNICAL SPECIFICATIONS
3.1 General specifications
3.2 Measurement specifications
3.2.1 DC Current (autorange)
3.2.2 AC Current(autorange)
3.2.3 DC Voltage (autorange)
3.2.4 AC Voltage (autorange)
3.2.5 Resistance
3.2.6 Audible continuity
4. OPERATING INSTRUCTION
4.1 AC Current measurement
4.2 DC Current measurement
4.3 DC Voltage measurement
4.4 AC Voltage measurement
4.5 Resistance measurement
4.6 Continuity measurement
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with the instrument. Before use, check that they are in
good condition.
1.1.2 During use
• Before measurement, warm up for at least 30 seconds.
• If the meter is used near noise generating equipment, be
aware that display may become unstable or indicate
large errors.
• Do not use the meter or test leads if they look damaged.
• Use the meter only as specified in this manual;
otherwise, the protection provided by the meter may be
impaired.
• To avoid damages to the instrument, do not exceed the
maximum limits of the input values shown in the
technical specification tables.
• Check the main function dial and make sure it is at the
correct position before each measurement.
• Use extreme caution when working around bare
conductors or bus bars.
• Never measure current while the test leads are inserted
into the input jacks.
• Accidental contact with the conductor could result in
electric shock.
• Caution when working with voltages above 60Vdc or
30Vac rms. Such voltages pose a shock hazard.
• Never perform resistance or continuity measure-ments
on live circuits.
• Before changing functions, disconnect the test leads
from the circuit under test.
• Keep the fingers behind the protection ring while
measuring.
• Change the battery when the symbol appears to avoid
incorrect data.
1.GENERAL INSTRUCTIONS
This instrument has been designed according to IEC1010
concerning safety requirements for electronic measuring
instruments and hand-held current clamps.
To get the best service from this instrument, read carefully
this user's manual and respect the detailed safety
precautions.
1.1Precautions safety measures
1.1.1 Preliminary
• This device can be used for measurement on category II
installations, for voltages never exceeding 600V (AC or
DC) relative to the earth.
• Definition of overvoltage categories (see IEC 664-1
publication):
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 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 IV:
MEASUREMENT CATEGORY IV is applicable to
test and measuring circuits connected at the source of the
building’s low-voltage MAINS installation.
• When using this clamp meter, the user must observe all
normal safety rules concerning:
- protection against the dangers of electric current.
- protection of the clamp meter against misuse.
• For your own safety, only use the test probes supplied
01 0 2

1.1.3 Symbols:
Symbols used in this manual and on the instrument:
Note-Important safety information, refer to the
instruction manual.
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
1.1.4 Instructions
• Before opening up the instrument, always disconnect
from all sources of electric current and make sure you
are not charged with static electricity, which may destroy
internal components.
• Any adjustment, maintenance or repair work carried out
on the clamp meter while it is live should be carried out
only by appropriately qualified personnel, after having
taken into account the instructions in this present manual.
• A "qualified person" is someone who is familiar with the
installation, construction and operation of the equipment
and the hazards involved. He is trained and authorized
to energize and de-energize circuits and equipment in
accordance with established practices.
• When the instrument is opened up, remember that some
internal capacitors can retain a dangerous potential even
after the instrument is switched off.
• If any faults or abnormalities are observed, take the
instrument out of service and ensure that it cannot be
used until it has been checked out.
• If the meter is not going to be used for a long time, take
out the battery and do not store the meter in high
temperature or high humidity environment.
1.2Maintenance and Cleaning
To avoid electrical shock or damage to the meter,
do not get water inside the case. Remove the test
leads and any input signals before opening the
case.
Periodically wipe the case with a damp cloth and mild
detergent. Do not use abrasives or solvents.
1.3 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.
WARNING
Do not mix old and new batteries. Do not mix
alkaline, standard (carbon-zinc), or rechargeable
(ni-cad, ni-mh, etc) batteries.
1.3.1 If the sign “ ” appears, it means that the
batteries should be replaced.
1.3.2 Loosen the fixing screw of the battery cover and
remove it.
03 0 4

Note:
Do not reverse the polarity of the batteries.
1.3.3 Replace the exhausted batteries with new ones.
1.3.4 Put the battery cover back and fix it again to its
origin form.
2. DESCRIPTION
2.1 Instrument Familiarization
V
OFF
COM V
AC/DC RANGE
HOLD
MASTECH
Mk
Hz
AC
DC
V
A
0 10 20 30 40
AUTO
CLAMP METER
MAX 400A
A
ZERO
CAT II
MAX 600V
ZERO
Auto Range
MS2102
AC/DC
CLAMP METER
1
2
3
4
5
6
7 8
9
10
11
1. Transformer jaws  2. Protection ring
3. Jaw opening trigger 4. ZERO key
5. AC/DC key 6. LCD display
7. COM terminal 8. VΩ terminal
9. RANGE key 10. Function switch
11. HOLD key
2.2 LCD Display
Mk
Hz
AC
DC
V
A
0 10 20 30 40
AUTO
ZERO
Low battery indication
Auto range indication
Zero reading indication
Hold data indication
Continuity function indication
Voltage measurement indication
Current measurement indication
Ohm measurement indication
DC input indication
AC input indication
Polarity indication
Analog bar graph indication
AC
DC
AUTO
ZERO
V
A
05 0 6

ZERO
ZERO
2.3 Keypad
HOLD key:
Fixes the display on the current value and memories it
(short press).
A second short press returns the clamp meter to normal
mode.
AC/DC key:
Selection of the dc (default) or ac mode: press on the key,
the beep sounds briefly.
This key is operative in V range.
ZERO key:
Press Zero key to enter the zero mode, " " annunciate
turn on and Zero the display and the reading is stored as
reference value for subsequent measurement.
Press it again, the " " annunciate blinking and
memorized reference value will display.
Press and hold down Zero key for 2 seconds to exit the
zero mode.
When the meter is under the zero mode, the autorange
function will be disabled.
RANGE key:
Selection of the automatic (default) or manual mode:
short press < 1 sec. on the key, the beep sounds briefly.
Switch from manual to autoranging mode: long press >
1 sec. on the key, the beep sounds briefly.
In manual mode, ranges selection: press successively <
1 sec. on the key.
This key is operative in V and A ranges.
2.4 Transformer jaws
Pick up the current flowing through the conductor
2.5 Terminals
V Ω : terminal receiving the red lead for voltage,
resistance, and continuity measurements.
COM: terminal receiving the black lead for voltage,
resistance, and continuity measurements as a common
reference.
3. TECHNICAL SPECIFICATIONS
3.1 General specifications
• Environment conditions:
Installation categories II,600V max. to earth
Pollution degree: 2
Altitude < 2000 m
Operating temperature:
0~40 °C (<80% RH, non-condensing)
Storage temperature:
-10~60 °C (<70% RH, battery removed)
• Max. Voltage between terminals and earth ground:
600V rms.
Operating principle: dual slop integration
Sample Rate: 2 times/sec for digital data
20 times/sec for analog bar
• Display:
3 3/4 digits LCD display with max. Reading 3999.
42 segments fast analog bar display.
Automatic indication of functions and symbols.
• Range selection: autorange and manual range.
• Over range indication:
LCD will show "OL". If measure value is over 4000V the
LCD will display "OL" (ACV&DCV range).
• Polarity indication: "-" displayed automatically.
• Jaw opening diameter: cables φ28mm.
• Maximum conductor size: φ28mm.
07 0 8

• Low battery indication:
The " " is displayed when the battery is under the
proper operation range.
• Auto power off time:
If there is no key or dial operation for 30 minutes, the
meter will power itself off to save battery consumption.
This function can be disabled by press and hold the
ZERO key then power the meter on.
• Power source: DC1.5V×2 SIZE AAA
• Dimensions: 194(L)×72(W)×35(H)mm.
• Weight: 210g. Approx. (battery included).
• Accessories: User's manual / Test leads / Carry case.
3.2 Measurement specifications
• Alignment marks
MARK
CONDUCTOR
MARKMARK
1. Position the conductor within the jaws at the
intersection of the indicated marks as much as possible
in order to meet this meter's accuracy specifications.
2. If the conductor is positioned elsewhere within the jaws,
the max. additional error resulted is 1.5 %.
• Accuracy:
±(% of reading + number of digits) at 18°C to 28°C (64°F
to 82°F) with relative humidity to 80%.
3.2.1 DC Current (autorange)
3.2.2 AC Current (autorange)
Range Resolution Accuracy
40A 0.01A ±(2.5%+5)
400A 0.1A
Maximum input current: 500A ac up to 60 seconds
Range Resolution Accuracy
40A 0.01A <10A ±(2.5%+10)
400A 0.1A ≥10A ±(2.5%+5)
Frequency Response: <100A: 50-400Hz;
Others: 50-200Hz.
Maximum input current: 500A ac up to 60 seconds
3.2.3 DC Voltage (autorange)
Range Resolution Accuracy
400V 0.1V ±(1.0%+5)
600V 1V
Input impedance: 10MΩ
Maximum input voltage: 600V dc or 600V ac rms.
09 1 0

3.2.4 AC Voltage (autorange)
Range Resolution Accuracy
400V 0.1V ±(1.0%+5)
600V 1V
Input impedance: 10MΩ
Frequency Response: 40~400Hz
Maximum input voltage: 600V dc or 600V ac rms.
3.2.5 Resistance
Range Resolution Accuracy
400Ω0.1Ω±(1.0%+5)
Open circuit voltage: -1.1~ -1.3V
Overload protection: 250V dc or 250V ac rms.
3.2.6 Audible continuity
Range Continuity beeper
≤40Ω
Open circuit voltage: -1.1~ -1.3V
Overload protection: 250V dc or 250V ac rms.
4. OPERATING INSTRUCTION
• If the current under measurement is higher than the
selected value for a long period, overheating may take
place, compromising the safety and operation of inner
circuits.
• Do not measure currents on high-voltage conductors
(>600V) to avoid risks of discharge and/or incorrect
readings.
4.1 AC Current measurement
Make certain that all test leads are disconnected
from the meter terminals.
• Set function switch to the A range.
• Press "AC/DC" key to select " AC" function.
• Clamp the current transducer (jaw) around one of the
conductors under test. Make sure that the clamp jaw be
perfectly closed.
• Read the display value.
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4.2 DC Current measurement 4.3 DC Voltage measurement
Make certain that all test leads are disconnected
from the meter terminals.
Open and close the clamp jaw several times to
demagnetize the clamp jaw before taking any DC
current measurement.
• Set function switch to the A range.
• Press "AC/DC" key to select "DC" function.
• Press "ZERO" key to enter the zero mode.
• Before measuring current large than 40A, adjust the
scale to 400A range by press the "RANGE" key then
perform auto zero operation.
• Clamp the current transducer (jaw) around one of the
conductors under test. Make sure that the clamp jaw be
perfectly closed.
• Read the display value.
Maximum input voltage of DCV range is 600Vdc.
Do not attempt to take any voltage measurement
that exceeds 600Vdc to avoid electrical shock
and/or damage to the instrument.
• Set function switch to the V range.
• Press "AC/DC" key to select " DC" function.
• Connect the black and red test leads to the COM and VΩ
terminals respectively.
• Connect the test leads to the circuit being measured and
read the displayed value.
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4.4 AC Voltage measurement 4.5 Resistance measurement
Maximum input voltage of ACV range is 600Vrms.
Do not attempt to take any voltage measurement
that exceeds 600Vrms to avoid electrical shock
hazard and/or damage to the instrument.
Before taking any in-circuit resistance
measurement, remove power from the circuit
being tested and discharge all capacitors.
• Set the function switch to the V range.
• Press " AC/DC" key to select " AC" function.
• Connect the black and red test leads to the COM and VΩ
terminals respectively.
• Connect the test leads to the circuit being measured
and read the displayed value.
• Set the function switch to range.
• Connect the black and red test leads to the COM and V
terminals respectively.
• Connect the test leads to the circuit being measured
and read the displayed value.
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4.6 Continuity measurement
Before taking any in-circuit measurement, remove
power from the circuit being tested and discharge
all capacitor in the circuit.
Using this appliance in an environment with a strong
radiated radio-frequency electro-magnetic field
(approximately 3V/m), may influence its measuring
accuracy. The measuring result can be strongly
deviating from the actual value.
• Set the function switch to range.
• Connect the black and red test leads to the COM and V
terminals respectively.
• Connect the test leads to the resistance in the circuit
being measured.
• When the test lead to the circuit is below 40Ω, it will be
indicated by a continuous beeping.
• Note: continuity test is available to check open/short of
the circuit.
CAUTION
17 R-00-05-XXXX