Mastech MS2000R Assembly instructions

OPERATOR’S
INSTRUCTION MANUAL
DIGITAL CLAMP METER
M

CONTENTS PAGE
Safety Information ..…………..……………....
Safety Symbols .…..………….…...…………..
Safety Precautions …..………...……………..
Maintenance .……………..…..…..……….....
General Description …….…..………………..
Front Panel Description ….…..…………..….
Clamp Meter Layout ……………………………
Operating Instructions ………....…………….
Specifications ………………..……….……....
Auto Power Off ……………………………….
Replacing The Battery .……..………………..
Accessories ……………….……………...…...
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CAUTION:
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).

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 an
overvoltage category (CAT II) and pollution 2.
SAFETY SYMBOLS
Important safety information, refer to the
operating manual.
Dangerous voltage may be present.
Earth ground.
Double insulation (Protection class II).
AC –Alternating Current.
DC –Direct current.
Battery.
Conforms to European Union directives.
1 

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.
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.
2 

•
•
•
•
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.

3 
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 an autoranging professional clamp meter
with digital and analog display, 3999 counts and 40
segment bar graph. For measuring DC and AC
voltage, DC and AC current, Resistance, Frequency
and Continuity Test with battery operated.
FRONT PANEL DESCRIPTION

Transformer jaws
Pick up the AC or DC current flowing through
the conductor.

4 




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 to
turn on / off the meter.
REL/WAKE button
When measuring:
Press the button to select enter the relative
measurement mode and the "REL" symbol will
appear on LCD. Press the button again, the
"REL" blink, the LCD shows the Input reading
of REL function active. Push this button more
than 1 seconds to disabled the function.
NOTE:
When press the button, the meter is converted
to a fixation range. So the measuring range is
the display current range.
After auto power off:
After auto power off, need pressing the button
one time for waking it. So the meter turn on.
LIGHT button
To use this function, press this LIGHT button.
When the button is pushed, the light of display
is on. After about 3 5 seconds, the light is

5 

self-off. The light is on again, just push this
button once.
“VHz” jack
This is positive input terminal for volt and
frequency measurement 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.
“” jack
This is the positive input terminal for ohms.
Connection is made using the red test lead.
LCD Display

6 
AUTO
Auto range indication.
MANU
fixation range indication
Negative polarity indicates for digital
reading.
AC
AC input indication
DC
DC input indication
Low battery indication
T-RMS
True rms indication
Auto power off indication
REL
Relative measurement indication
Auto hold is active.
MAX
Maximum reading displayed.
MIN
Minimum reading displayed.
MAX MIN
Current value measurement indication
Continuity beeper function indication.
Testing diode mode
A
Current measurement indication
mV
Voltage measurement indication
Mk
Ohm measurement indication
kHz
Frequency measurement indication

7 

MAX button
Press the button to select enter the Maximum
value recording hold mode and the "MAX"
symbol will appear on LCD.
" MAX MIN" blink is current value. When the
meter operates in Maximum value recording
hold mode, push this button more than 1
seconds to disabled the function.
NOTE:
When press the button, the meter is converted
to a fixation range. So the measuring range is
the display current range.

Trigger
Press the lever to open the transformer. When
the lever is released, the jaws will close again.

8 
CLAMP METER LAYOUT
M

9 
OPERATING INSTRUCTIONS
DC VOLTAGE MEASUREMENT
1.
2.
3.
4.
Connect the red test lead to the “VHz” jack and
the black lead to the “COM” jack.
Set rotary switch at desired V 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 “VHz” jack and the
black test lead to the “COM” jack.
Set the rotary switch at desired V~ position.
Connect test leads across the source or load
being measured.
Read voltage value on the LCD display.
DC CURRENT MEASUREMENT
1.
2.
3.
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.

10 
AC CURRENT MEASUREMENT
1.
2.
3.
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.
RESISTANCE MEASUREMENT
1.
2.
3.
4.
Connect the red test lead to “”jack and black
test lead to the “COM” jack (The polarity of red
lead is positive “+”).
Set the rotary switch at desired “”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 leads.
NOTE:
1.
If the resistance being measured exceeds the
maximum value of the range selected or the
input is not connected, an overrange indication
“OL” will be displayed.

11 
2.
3.
4.
When checking in -circuit resistance, be sure the
circuit under test has all power removed and
that all capacitors have been discharged fully.
For measuring resistance above 1M, the meter
may take a few seconds to get stable reading. It
is normal for high resistance measurements.
When the input is not connected, i.e. at open
circuit, the figure “OL” will be displayed for the
overrange condition.
MEASURING FREQUENCY
1.
2.
3.
4.
Connect the red test lead to “VHz” jack and the
black test lead to the “COM” jack.
Set the rotary switch at desired kHz position.
Connect test leads across the source or load
being measured.
Read frequency value on the LCD display.
NOTE:
The input voltage should be between 200mV and 10V
rms. ac. If the voltage is more than 10V rms. reading
may be out of the accuracy range.

12 
AUDIBLE CONTINUITY TEST
1.
2.
3.
Connect red test lead to “”jack, black test lead
to “COM” jack. The polarity of red lead
connection is positive “+”.
Set range switch to “ ” position.
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℃to 28℃(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, 3999 counts and 40 segments bar graph
Ranging method: Auto range
Polarity indication:
“” Displayed for negative polarity
Overrange indication:
Only figure “OL” on the display

13 
Jaw opening capability:
55mm (Max conductor size)
Power: 9V battery, NEDA1604 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: 282mm×104mm×47mm
Weight: Approx. 570g
DC VOLTAGE
Range
Resolution
Accuracy
400mV
0.1mV
4V
1mV
0.8% of rdg 1 digit
40V
10mV
400V
0.1V
1000V
1V
1.0% of rdg 2 digits
Input Impedance: 10M

14 
AC VOLTAGE ( true rms., ac-coupled )
Range
Resolution
Accuracy
4V
1mV
1.0% of rdg 5 digits
40V
10mV
400V
0.1V
750V
1V
1.2 % of rdg 5 digits
Input Impedance: 10M
Frequency range: 40Hz to 200Hz.
Response: True rms. Rms. conversion with signal
crest factor: 5.
AC CURRENT ( true rms., ac-coupled )
Range
Resolution
Accuracy
400A
0.1A
600A: 2% of rdg 5 digits
600A: 3% of rdg 5 digits
1000A
1A
Overload Protection: 1100A for 60 seconds maximum.
Frequency range: 50Hz to 60Hz.
DC CURRENT
Range
Resolution
Accuracy
400A
0.1A
600A: 2% of rdg 5 digits
600A: 3% of rdg 5 digits
1000A
1A
Overload Protection: 1100A for 60 seconds maximum.

15 
RESISTANCE
Range
Resolution
Accuracy
400
0.1
1.5% of rdg 5 digits
4k
1
40k
10
400k
0.1k
4M
1k
40M
10k
2.5% of rdg 10 digits
Maximum Open Circuit Voltage: 0.5V
Overload Protection: 250V dc or rms. ac for all
ranges.
FREQUENCY
Range
Resolution
Accuracy
4kHz
1Hz
1.0% of rdg 5 digits
40kHz
10Hz
400kHz
100Hz
Sensitivity: 200mV rms.
AUDIBLE CONTINUITY
Range
Description
If continuity exists (about less than 30),
built-in buzzer will sound.

16 
AUTO POWER OFF
To extend the battery life,Auto Power Off function is
provided.After the meter no operations about 30
minutes, the meter will be turned off automatically.
To turn it on need pushing the "REL" button only.
REPLACING THE BATTERY
WARNING
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.
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