Mastech MS2001 Assembly instructions

OPERATOR’S
INSTRUCTION MANUAL
DIGITAL CLAMP METER

CONTENTS PAGE
SAFETY INFORMATION ….……………………..…………...
SAFETY SYMBOLS ..………………………………….….…..
SAFETY PRECAUTIONS ………………………………..…
MAINTENANCE .………..……………………………..…….
GENERAL DESCRIPTION …..…..………………………....
FRONT PANEL DESCRIPTION …..………..………..…….
OPERATING INSTRUCTIONS .………..……………..…….
SPECIFICATIONS ..…...……………………..………...……..
REPLACING THE BATTERY .....…………….…….……..….
ACCESSORIES ...………..…………………………………….
1
1
2
3
3
3
6
8
10
10

SAFETY INFORMATION
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 overvoltage category 1000V CAT II 600V CAT III and pollution
2.
SAFETY SYMBOLS
Important safety information, refer to the operating manual.
Dangerous voltage may be present.
Earth ground.
Double insulation ( Protection class 1000V CAT II 600V
CAT III ).
The digital clamp meter complies with the requirements of the
following European Community Directives: 89/336/EEC ( Elec-
tromagnetic 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
-1-

SAFETY PRECAUTIONS
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 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.
-2-

MAINTENANCE
•
•
•
•
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.
GENERAL DESCRIPTION
The meter is a handheld 3 1/2 digital clamp meter for measuring
DC and AC voltage, AC current, Resistance, Diode and Continuity
Test with battery operated.
FRONT PANEL DESCRIPTION









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.
-3-
















⑨
⑨⑨
⑨
⑩
⑩⑩
⑩
Back light
To use this function, press the 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, 16mm high, LCD.
“V” jack
This is positive input terminal for VOLT measurements
connection is made to it using the red 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 and diode.
Connection is made to it using the red test lead.
Power Switch
A push −push switch is used to turn the meter on or off.
Trigger
Press the lever to open the transformer jaws. When the
lever is released, the jaws will close again.
-4-

CLAMP METER LAYOUT
-5-

OPERATING INSTRUCTIONS
DC VOLTAGE MEASUREMENT
1.
2.
3.
4.
Connect the red test lead to the “V” jack and the black lead
to the “COM” jack.
Set rotary switch at desired 1000V position.
Connect test leads across the source or load being
measured.
Read voltage value on the LCD display along with the
polarity of the red lead connection.
AC VOLTAGE MEASUREMENT
1.
2.
3.
4.
Connect the red test lead to “V~” jack and the black test lead
to the “COM” jack.
Set the rotary switch at desired 750V~ position.
Connect test leads across the source or load being
measured.
Read voltage value on the LCD display.
AC CURRENT MEASUREMENT
1.
2.
3.
4.
Set the rotary switch at desired A~ position.
Press the trigger to open transformer jaw and to clamp one
conductor only, making sure that the jaw is firmly closed
around the conductor.
Read current value on LCD display.
When only the figure “1” is displayed, it indicates overrange
situation and the higher range has to be selected.
-6-

RESISTANCE MEASUREMENT
1.
2.
3.
4.
Connect the red test lead to “Ω” jack and black test lead
to the “COM” jack (The polarity of red lead is positive “+”).
Set the rotary switch at desired ”Ω” range position.
Connect test leads across the resistor to be measured and
read LCD display.
If the resistance being measured is connected to a circuit ，
turn off power and discharge all capacitors before applying
test probes.
NOTE:
1.
2.
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.
When checking in-circuit resistance, be sure the circuit under
test has all power removed and that all capacitors have been
discharged fully.
AUDIBLE CONTINUITY TEST
1.
2.
3.
Connect red test lead to “Ω” jack, black test lead to
“COM” jack.
Set range switch to “ ” position.
Connect test leads to two points of circuit to be tested. If
continuity exists, built-in buzzer will sound.
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
“+”.). -7-

2.
3.
Set the rotary switch at “ ” position.
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.
The approx. forward voltage drop of the diode will be
displayed. If the connection is reversed ， only figure “1” will be
shown.
SPECIFICATIONS
Accuracy is specified for a period of one year after calibration and
at 18 ℃ to 28 ℃ (64°F to 82°F) with relative humidity to 80%.
GENERAL
Maximum voltage
between terminals and
earth ground
: CAT II 1000V and CAT III 600V
Display : LCD, 1999 counts, updates 2 ― 3/ sec.
Polarity indication : “ ― ”displayed for negative polarity.
Overrange Indication : Only figure “1” on the display.
Jaw opening capability
: 42mm (Max conductor size)
Power : 9V battery, NEDA 1604 6F22 006P.
Low battery indication : “ ” Appears on the display.
Operating Environment
: 0 to 40 ℃
Storage temperature : ― 10 ℃ to 50 ℃
Temperature coefficient
: 0.1 × specified accuracy) / ℃
( <18 ℃ or >28 ℃ )
Altitude : 2000m
Size : 250mm × 99mm × 43mm
Weight : Approx.460g.
-8-