Mastech MS20006 User manual

MS2000G
DIGITAL AC/DC CLAMP METER
MASTECH
HOLD
SAFETY INFORMATION .……………………………2
SAFETY SYMBOLS .…………………………………2
SAFETY PRECAUTIONS ……………………………3
MAINTENANCE .………………………………………4
GENERAL DESCRIPTION …..………………………4
FRONT PANEL DESCRIPTION …..…………………5
OPERATING INSTRUCTIONS ………………………8
SPECIFICATIONS …...……………………………11
REPLACING THE BATTERY ...……………………12
ACCESSORIES ………………………………………13
CONTENTS

The digital clamp meter has been designed according
to IEC1010 – 1 and IEC1010 – 2 – 032 concerning
safety requirements for electrical measuring
instruments and hand – held current clamps with an
overvoltage category (CAT II) and pollution 2.
SAFETY INFORMATION
SAFETY SYMBOLS
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.
The digital clamp meter complies with the requirements
of the following European Community Directives:
89/336/EEC (Electromagnetic Compatibility) and
73/23/EEC (Low Voltage) as amended by 93/68/EEC
(CE Marking).
However, electrical noise or intense electromagnetic
fields in the vicinity of the equipment may disturb the
measurement circuit. Measuring instruments will also
respond to unwanted signals that may be present within
the measurement circuit.
Users should exercise care and take appropriate
precautions to avoid misleading
Follow all safety and operating instructions to ensure
maximum personal safety during the operation and to
ensure the meter is used safely and is kept in good
operating condition.
●Read these operating instructions thoroughly and
completely before operating your meter. Pay particular
attention to WARNINGS, which will inform you of
potentially dangerous procedures. The instructions in
these warnings must be followed.
●Always inspect your meter and test leads for any sign
of damage or abnormality before every use. If any
abnormal conditions exist (i.e. broken test leads,
cracked cases, display not reading, etc.), do not attempt
to take any measurements.
●Do not expose the instrument to direct sunlight,
extreme temperature or moisture.
●Never ground yourself when taking electrical
measurements. Do not touch exposed metal pipes,
outlets, fixtures, etc., which might be at ground
potential. Keep your body isolated from ground by using
SAFETY PRECAUTIONS
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.

dry clothing; rubber shoes, rubber mat, or any approved
insulating material.
●You always are careful when working with voltages
above 60V dc or 30V ac rms. Keep fingers behind the
probe barriers while measuring.
●Never use the meter to measure voltages that might
exceed the maximum allowable input value of any
function.
●Never touch exposed wiring, connections or any live
circuit when attempting to take measurements.
●Before opening the case, always disconnect test
leads from all energized circuits.
●Never use the meter unless the back cover is in
place and fastened completely.
●Do not use abrasives or solvents on the meter. To
clean it using a damp cloth and mild detergent only.
●Qualified and trained service technicians should
only perform calibration and repair of the meter.
●Do not attempt calibration or service unless trained
and another person capable of rendering first aid and
resuscitation is present.
MAINTENANCE
The meter is a handheld 31/2 digital clamp meter for
GENERAL DESCRIPTION
measuring DC and AC voltage, AC current, Resistance,
Frequency, Temperature (°C&°F), Diode and Continuity
Test with battery operated.
Transformer jaws
Pick up the AC current flowing through the
conductor.
Hold button
When this button is pushed, the display will keep the
last reading and “ ” symbol will appear on the
LCD until pushing it again.
Rotary switch
This switch is used to select functions and desired
ranges as well as to turn on/off the meter.
Backlight
To use this function, press the Back light button.
When this button is pushed, the Back light of display
is on. After about 3 - 5 seconds, the Back light is self-
off. The Back light is on again, just push this button
once.
Display
3 1/2 digit, 7 segment, 18mm high, LCD.
“VHz” jack
This is positive input terminal for VOLT
measurements connection is made to it using the red
FRONT PANEL DESCRIPTION
(1)
(2)
(3)
(4)
(5)
(6)

test lead.
“COM” jack
This is negative (ground) input terminal for all
measurement modes except current. Connection is
made to it using the black test lead.
“Ω” jack
This is the positive input terminal for ohms.
Connection is made to it using the red test lead.
Temperature Measuring Socket
Insert a “K” type thermocouple into the temperature
measuring socket and contact the object to be
measured with the thermocouple probe.
Trigger
Press the lever to open the transformer. When the
lever is released, the jaws will close again.
(7)
(8)
(9)
(10)
MASTECH
HOLD
06
CLAMP METER LAYOUT
1
2
3
4
5
68
9
10
7

1.Connect the red test lead to the “VHz” jack and the
black lead to the “COM” jack.
2.Set rotary switch at desired V position.
3.Connect test leads across the source or load being
measured.
4.Read voltage value on the LCD display along with the
polarity of the red lead connection.
OPERATING INSTRUCTIONS
DC VOLTAGE MEASUREMENT
AC VOLTAGE MEASUREMENT
1.Connect the red test lead to “VHz” jack and the black
 test lead to the “COM” jack.
2.Set the rotary switch at desired V~ position.
3.Connect test leads across the source or load being
measured.
4.Read voltage value on the LCD display.
AC CURRENT MEASUREMENT
1.Set the rotary switch at desired A~ position.
2.Press the trigger to open transformer jaw and to
clamp one conductor only, making sure that the jaw
is firmly closed around the conductor.
3.Read current value on LCD display.
RESISTANCE MEASUREMENT
1.Connect the red test lead to “Ω” jack and black test
lead to the “COM” jack. (The polarity of red lead is
positive “+”.)
2.Set the rotary switch at desired ”Ω” range position.
3.Connect test leads across the resistor to be
measured and read LCD display.
4.If the resistance being measured is connected to a
circuit,turn off power and discharge all capacitors
before applying test probes.
NOTE:
1.If the resistance being measured exceeds the
 maximum value of the range selected or the input is
 not connected, an overrange indication “1”will be
 displayed.
2.When checking in-circuit resistance, be sure the
circuit under test has all power removed and that all
capacitors have been discharged fully.
3.For measuring resistance above 1MΩ, the meter may
take a few seconds to get stable reading. This is
normal for high resistance measurements.
MEASURING TEMPERATURE
1.Set the rotary switch at °C or °F Position. The LCD
display will show the current environment
temperature.

10 11
2.Inserts “K” type thermocouple into the temperature
measuring socket on the front panel and contact the
object to be measured with the thermocouple probe.
3. Read temperature value on the LCD display.
1. To avoid electric shock, be sure the thermocouple has been
removed before changing to another function measurement.
2. Before attempting to insert thermocouple for testing, always be
sure that test leads have been disconnected from any
measurement circuits.
3. The thermocouple has been removed when making voltage
measurements with test leads.
WARNING
MEASURING FREQUENCY
1.Connect red test lead to the “VHz” jack and the black
test to the COM jack.
2.Set the rotary switch at Hz Position.
3.Connect test leads across the source or load under
measurement.
NOTE:
1.DO not apply more than 250Vrms to the input.
2.In noisy environment, it is preferable to use shield
 cable for measuring small signal.
DIODE TEST
1.Connect the red test lead to “Ω” jack and the black
test lead to the “COM” jack (The polarity of red lead
is positive “+”.).
2.Set the rotary switch at “ ” position.
3.Connect the red test lead to the anode of the diode to
be tested and the black test lead to the cathode of the
diode.
4.The approx. forward voltage drop of the diode will be
displayed. If the connection is reversed,only figure
“1” will be shown.
AUDIBLE CONTINUITY TEST
1.Connect red test lead to “Ω” jack, black test lead to
 “COM” jack.
2.Set range switch to “ ” position.
3.Connect test leads to two points of circuit to be
 tested. If continuity exists, built-in buzzer will sound.
SPECIFICATIONS
Accuracy is specified for a period of one year after
calibration and at 18°C to 28°C (64°F to 82°F) with
relative humidity to 80%.
GENERAL
Maximum voltage between
terminals and earth ground :
CAT II 1000V dc or 750V
ac rms. (sine)
Display LCD, 1999 counts, updates
2-3/ sec.

12 13
Polarity indication “-”displayed for negative
polarity
Overrange Indication Only figure “1” on the display
Jaw opening capability 55mm (Max conductor size)
Power 9V battery, NEDA 1604 or
IEC 6F22
Low battery indication “ ” appears on the display
Operating Environment 0 to 40°C
Storage temperature -10°C to 50°C
Temperature coefficient 0.1×specified accuracy) /
°C ( <18°C or >28°C )
Altitude 2000m
Size 282mm×104mm×47mm
Weight Approx.570g.
DC VOLTAGE
Range 
2V
20V
200V
1000V
Resolution 
1mV
10mV
0.1V
1V
Accuracy
±0.5% of rdg ± 1 digit
±1.0% of rdg ± 2 digit
Input Impedance: 10MΩ
AC VOLTAGE
Range 
200V
750V
Resolution 
0.1V
1V
Accuracy
±1.0% of rdg ± 3 digit
Input Impedance: 10MΩ
Frequency range: 40Hz to 400Hz.
Response: Average responding, calibrated in rms. of sine
wave.
AC CURRENT
Range 
200A
2000A
Resolution 
0.1A
1A
Accuracy
±2.0% of rdg ± 5 digit
Overload Protection: 2200A for 60 seconds maximum.
Frequency range: 50Hz to 60Hz.
<600A ±2.0% of rdg ± 5 digits
600A to1000A ±3.0% of rdg ± 5 digits
>1000A ±3.0% of rdg ± 15 digits
RESISTANCE
Range 
200Ω
20kΩ
Resolution 
0.1Ω
10Ω
Accuracy
±1.0% of rdg ± 3 digit
2MΩ1kΩ
±1.5% of rdg ± 15 digit
±1.5% of rdg ± 15 digit

14
TEMPERATURE
Range 
0°C to 750°C
32°F to 1400°F
Resolution 
1°C
1°F
Accuracy
±1.0% of rdg ± 3 °C
±1.0% of rdg ± 3 °F
Test Range
0°C to 400°C
32°F to 752°F
400°C to 750°C
752°F to 1400°F
±2.0% of rdg ± 1 °C
±2.0% of rdg ± 1 °F
FREQUENCY
Range 
2kHz
20kHz
Resolution 
1Hz
10Hz
Accuracy
±2.0% of rdg ± 5 digit
±1.5% of rdg ± 5 digit
Input Limit: 250V ac.
DIODE & CONTINUITY
Range  Description
Display read approximate forward voltage of diode.
If continuity exists (about less than 30Ω), built-in
buzzer will sound.
Before attempting to open the case of battery, always be sure that
test leads have been disconnected from measurement circuits.
Close case and tighten screws completely before using the meter
to avoid electrical shock hazard.
WARNING
REPLACING THE BATTERY
If “ ”appears on display, it indicates that the battery
should be replaced. Use the following procedure to
replacing the battery:
1.Disconnect test leads from any live source, turn
the rotary switch to OFF, and remove the test
leads from the input terminals.
2.The battery cover is secured to the bottom case by
a screw. Using a screwdriver, remove the screw
from the battery cover and remove the battery
cover.
3.Remove battery and replace with a new equivalent
9 volt battery.
4.Replace the battery cover and reinstall the screw.
ACCESSORIES
• Operator’s instruction manual • Set of test leads
• “K”type thermocouple
• 9 volt battery. NEDA 1604 6F22 006P type
• Gift box
Using this appliance in an environment with a strong radiated radio-frequency
electromagnetic field (approximately 3V/m),may influence its measuring
accuracy. The accuracy can be reduced to ±(12% of reading + 6 digits).
CAUTION:
Replace test leads if leads become damaged or worn.
Use meet EN 61010-031 standard, rated
CAT II 1000V, or better test leads.
WARNING
Replacing Test Leads
R-00-05-XXXX