Mastech MS2002 Assembly instructions

OPERATOR’S
INSTRUCTION MANUAL
DIGITAL CLAMP METER
V
20
A
600
V
600
2
A
200
A
HOL D
CLA MP METE R
LIGHT ON/OFF
Digital Clamp Met er
220 200
V
A
kHz
2
V
COM
CAT.II
MAX 6 00V

CONTENTS CONTENTS
1. .. .......................1General instruction ..
2.1 ..............................1Precautions for us ......
2.2 ........................................2Safety symbols
2.3 ............................................2Maintenance
2. Description........................................1
3.1 .................................... ....3Meter panel ......
3.2 ...... .........5LCD display ..............................
3.3 .. ............ .....6Functional keys . ...................
3.4 .................... ........ .6Transformer jaws ....... .
3.5 ... .................. ....6 Input socket .. .................
4. .............. .....7Technical index ..............
4.1 . .................. .... .......7General index . ........ ...
4.2 ................................. ......8Accuracy index .
5.1 ..............10AC Current (ACA) measurement
5.2 .............12DC Voltage (DCV) measurement
5.3 ..............13AC Current (ACV) measurement
5.4 ................ ..14Resistance ( ) measurementΩ.
5.5 .......................... .15Audible continuity test....
6.1 ........................... .16Maintenance ...............
DIGITAL CLAMP METER DIGITAL CLAMP METER
3.
........ . ......3
Each component
name description .... .
5. .......... .... .10Operating Instructions ..... ..
6. .......... .... .16Meter Maintenance ..... ........
6.2 ................. .16Battery replacement ...............

01 02
1. General instructions
This digital clamp meter has been designed according
to International Electro Safety Standard IEC-61010
concerning safety requirements for electronic
measuring instruments and hand-held current clamps;
meeting the requirements for 600CAT.II of IEC-61010
and grade 2 for pollution.
Before using this meter, please read carefully this
user's manual and respect the related safety precautions.
2.1 Precautions for use
• Before measurement, warm up for at least 30 seconds.
• Don’t use the meter or lead if they look damaged.
• To meet the safety requirements, only use the test
leads supplied with the meter. If the test lead should
be replaced, a new one with the same model or same
electric specification should be adopted.
• If the meter is placed in a relatively noisy environment,
meter readings will become unstable, even with big
errors.
• Before changing the measuring range, you must
ensure that the test lead is not connected to any
circuit to be tested.
• When you can’t determine the size range of signal to
be tested, please switch the measuring range to the
maximum position.
• When you use the meter to measure, you should make
the test lead and the rotary switch in the correct position.
• When use the test lead to measure, you should keep
the fingers behind the protection ring.
DIGITAL CLAMP METER DIGITAL CLAMP METER
2. General instructions
•
RMS, please operate carefully to prevent electric shock.
• Do not exceed the input limit specified in each
measuring range to prevent the meter to be damaged.
• When measuring current, the test lead can not be
inserted into the input socket.
• When you hold the clamp meter to measure, you
should keep the fingers behind protection ring of
meter body.
• Before on-line resistance measurement, you should
turn off the power for all circuits and discharge all
capacitors.
• Change the battery as early as possible when the“ ”
symbol appears to avoid incorrect reading.
When the voltage to be tested exceeds 60VDC or 30VAC
2.2 Safety symbols
Symbols used on the meter and in this manual:
Important cautions, refer to the
instruction manual.
Earth
Double insulation (safety equipment
with category II)
2.3 Maintenance
•
professionals.
• To prevent contamination or electrostatic damage
inside the meter, before opening the meter case,
appropriate protective measures should be taken.
• If you notice any abnormality, the meter should be
turned off and sent for repair immediately.
Maintenance and calibration should be done by

03 04
DIGITAL CLAMP METER DIGITAL CLAMP METER
• If the casing is not covered properly, screws are not
tightened, do not put it to use.
• When it is not in use for a long time, please remove
the battery and avoid storing it in the place with high
temperature and humidity.
3. Each component name description
3.1 Meter panel
V
20
A
600
V
600
2
A
200
A
HOLD
CLAMP METER
LIGHT ON/OFF
Digital Clamp Meter
220 20 0
V
A
kHz
2
V
COM
CAT.II
MAX 600V
7
8
9
(1)
(2)
(3)
(4)
(5)
(6)
(7) Ω
(8)
(9)
(10)
Transformer jaws
Protection ring
Jaw opening trigger
LIGHT key
LCD display
COM input socket
V input socket
ON/OFF key
Rotary switch
HOLD key

DC
Low battery indication
Hold data indication
Continuity function indication
Voltage measurement indication
Current measurement indication
Ohm measurement indication
DC input indication
AC input indication
Negative polarity indication
H
V
A
AC
05 06
DIGITAL CLAMP METER DIGITAL CLAMP METER
DC
AC
220 200
V
A
2
3.2LCD display 3.3 Functional keys
HOLD key:
• Press this key; LCD display will keep the test value.
• Press this key again, the meter will return to normal mode.
ON/OFF key:
• This key is used to turn the meter on or off.
LIGHT key:
• Holding this key for 3 seconds to turn the backlight on, press it
again, the backlight is auto-off.
3.4 Transformer jaws
• Pick up live conductor to induce AC current signals.
3.5 Input socket
• V
resistance measurement and audible continuity test
(connected with red lead).
• COM input socket: Negative terminal of voltage,
resistance measurement and audible continuity test
(connected with black lead).
Ω input socket: Positive terminal of voltage,

07 08
4. Technical index
DIGITAL CLAMP METER DIGITAL CLAMP METER
4.1 General index
• Environmental conditions for using:
Temperature and relative humidity of working
environment: 0~40 ˚C (<80%RH).
• Temperature and relative humidity of storage
environment: -10~60 ˚C (<70%RH, removing battery).
• Maximum voltage between any input socket
and earth: 600Vrms.
• Principle of measurement: double integral A/D
conversion.
• Sampling rate: about 2 times/second.
• Display: 3 1/2 digits LCD display with max.
reading 1999.
• Automatically indicate unit and symbol according to
function level.
• Measuring range switch method: manually
• Over measuring range indication: “OL” will display on
LCD. When the input measuring voltage exceeds
2000V, “OL” will display on the LCD (ACV and DCV).
• Input polarity indication: “–” symbol will display
automatically.
• Low battery indication: When the low battery is lower
than the normal operating voltage,“ ”will display on
the LCD.
• Battery: DC 1.5V X 2 SIZE AAA
• Max. opening dimension of transformer jaws: φ28mm.
• Max. dimension of conductor: φ28mm.
• Dimension: 194(L)×72(W)×35(H)mm.
• Weight: about 200g (with battery).
• Accessories: Instruction Manual, leads, package bag
and package box.
MARK
CONDUCTOR
MARK
MARK
4.2Accuracy index
Accuracy: ±( % reading + the number of characters),
gurantee for one year.
Base condition: ambient temperature is from
18˚C to 28˚C, relative humidity is not greater than 80%
• When making AC current measurement, please position
the conductor to the center If the conductor is not
positioned at the center, the max. additional error
resulted is 1.5%.

09 10
Please make sure that all test leads are
removed from the input socket.
The current of the conductor with high voltage
(>600V) is not allowed for measurement to
prevent electrical shock.
WARNING
DIGITAL CLAMP METER DIGITAL CLAMP METER
Accuracy
Resolution
range
±(2% of rdg
+ 20 )characters
2A
20A
200A
0.001A
0.01A
0.1A
- Frequency range: 50/60Hz
4.2.1 AC Current
4.2.3 AC Current
4.2.2 DC Voltage
Accuracy
Resolution
Range
200V
600V
0.1V
1V ±(1% of rdg + 5 )characters
- Input impedance: 10MΩ
-Maximum input voltage: 600V DC or 600V AC RMS.
Accuracy
Resolution
Range
200V
600V
0.1V
1V ±(1.5% of rdg + 5 )characters
-
-
-
Input impedance: 10M
Frequency response: 40~400Hz
Maximum input voltage: 600V DC or 600V AC RMS.
4.2.4 Resistance
Accuracy
Resolution
Range
200Ω1Ω±(1% of rdg + 5 )characters
-
-
Open-circuit voltage: Less than 700mV
Overload protection: 250V DC or 250V AC RMS.
4.2.5 Audible continuity
Resolution
Range
Inbuilt buzzer will alarm when the
resistance is lower than 70Ω
-
-
Open-circuit voltage: below 700mV
Overload protection: 250V DC or 250V AC RMS.
5. Operating Instructions
5.1 AC Current (ACA) measurement
• Turn the rotary switch to position A in the desired range.
• Pull the trigger, clamp the wire to be measured
(one line) in the center of transformer jaws (shown as
below figure) and make transformer jaws fully closed.
• The measurement current value can be read through
the LCD display.
• If only “OL”shows on the display, it means overload,
and a higher measuring range should be selected
immediately.

11 12
DIGITAL CLAMP METER DIGITAL CLAMP METER
CORRECT
INCORRECT
5.2DC Voltage (DCV) measurement
Maximum input voltage of DC voltage (DCV) is
600VDC. DC voltage higher than 600Vdc is not
allowed for measurement to prevent electrical
shock and / or damage the meter.
WARNING
• Turn the rotary switch to 600V .
• Connect black test lead and red test lead to COM input
socket and V input socket separately.
• Use the other two ends of test leads to measure the
voltage of circuit to be measured. (Connect with the
circuit to be measured in parallel)
• The measurement current value can be read through
the LCD display.

13 14
DIGITAL CLAMP METER DIGITAL CLAMP METER
5.3 AC Voltage (ACV) measurement
Maximum input voltage of AC current (ACV) is
600Vrms. AC voltage higher than 600Vrms is
not allowed for measurement to prevent
electrical shock and / or damage the meter.
WARNING
• urn the rotary switch to 600V~.
• Connect black test lead and red test lead to COM
input socket and V input socket separately.
• Use the other two ends of test leads to measure the
voltage of circuit to be measured. (Connect with the
circuit to be measured in parallel)
• The measurement voltage value can be read through
the LCD display.
5.4 Resistance ( ) measurement Ω
Before making online resistance measurement,
make certain that all test circuits are
disconnected and discharge all capacitors.
WARNING
• Turn the rotary switch to
• Connect black test lead and red test lead to COM input
socket and V input socket separately.
• Use the other two ends of test leads to measure the
resistance of circuit to be measured.
• The measurement voltage value can be read through
the LCD display.
Ω

15 16
DIGITAL CLAMP METER DIGITAL CLAMP METER
5.5Audible continuity test
Before making online resistance measurement,
make certain that all test circuits are
disconnected and discharge all capacitors.
WARNING
• Turn the rotary switch to
• Connect black test lead and red test lead to COM
input socket and V input socket separately.
• Use the other two ends of test leads to make
continuity test.
• When making continuity test, if the resistance of
circuit to be measured is less than 70 , buzzer will
alarm continuously.
Ω
Ω
Continuity (audible) No continuity
6. Meter Maintenance
6.1 Maintenance
Before opening the back cover, you should
power off and make sure that the test lead is
disconnected from the measurement circuit to
avoid electric shock.
WARNING
Use a piece of damp cloth and a small amount of
detergent to clean the meter regularly, do not use
chemical solvent to clean the meter.
6.2 Battery Replacement
Before opening the battery cover, power off and
make certain that all test leads are
disconnected from the testing circuits to avoid
electric shock.
WARNING
Follow these steps to replace the battery:
• When the battery voltage is lower than the normal
operating voltage, low battery symbol“ ”will display
on the LCD display. At this moment, the battery should
be replaced.
• Press the power switch to cut off the meter power supply.
• Unscrew the screws on the battery cover, remove the
old battery and replace it with a new AAA 1.5V battery.
• Install the bottom shell back and tighten the screws.