Mastech MS2108 User manual

MS2108
DIGITAL CLAMP METER
OPERATION MANUAL
Hz
AUTO M ANU M AX MIN ZER O
°C°F%
μmVA
nμmF
MkΩ
INR USH
TRM S
AC/DC CLAMP METER INRUSH
T-RMS AUTO-PWER OFF
Press 2 Sec
MS2108
Ω
A
V
COM INPUT
CAT III
MAX600V
600V
B.L
HOLD
Hz/%
RAN
MIN
MAX
SEL
A
OFF
600V CAT lll
MAX 600A
OFF

1.1 Preliminary
1.2 During use
1.3 Symbols............
CONTENTS CONTENTS
1. Safety Information............................1
............................................1
...................................2
.............................4
4
............7
..................................7
.......................15
.................................15
.................................15
................16
....................................16
....................................3
..............................17
...
....
..
1.4 Maintenance............
2. Description.......................................
2.1 Names OF Parts
....................................6
2.2 Switch, Buttons And Input Jacks
2.3 Names OF Parts
3. Specifications..................................11
4. Operation Instruction
........................11
3.1 General Specifications
3.2 Technical Specifications ......................12
4.1 Holding Readings
4.2 Switching Ranges
4.3 Switching Frequency Or Duty
4.4 Switching Maximum Or
Minimum Value
4.5 Switching Functions
4.6 Back Light And Clamp Lighting Bulb
4.7 Auto Power Off..........................................18
4.8 Preparing For Measurement
4.9 Measuring Ac Current
4.10 Measuring Inrush Current
4.11 Measuring Dc Current
4.12 Measuring Ac Voltage
4.13 Measuring Dc Voltage
......................19
...............................20
........................22
..............................24
..............................26
..............................27
..............................30
.......................................34
.............................38
..........................................40
....................................42
...........................44
.......17
4.14 Measuring Frequency
4.15 Measuring Duty
4.16 Measuring Resistance
4.17 Testing Diode
4.18 Testing Continuity
4.19 Measuring Capacitance
5. Maintenance.......................................46
.............................46
5.1 Replacing The Batteries
5.2 Replacing Test Leads
.................................46
6. Accessories.......................................46

03 0 4
1.3 Symbols
Caution, risk of danger (Important safety
information; refer to the operation manual.)
Application around and removal from HAZARDOUS
LIVE conductors is permitted.
Double insulation(Protection class II).
Conforms to European Union Directive
Earth (ground) terminal
1.4 Maintenance
1.4.1 Do not attempt to remove the rear case to adjust
or repair the meter. Such actions should only be
performed by a technician who fully understands
the meter and the danger involved.
1.4.2 Before opening the case and battery cover of the
meter, always disconnect test leads from all
sources of electric current. Disconnect the test
leads from all sources of electric current before
1.2.11 Do not use the meter near explosive gases,
steam or dirt.
1.2.12 Stop using the meter if any abnormalities or
faults are observed.
1.2.13 Do not use the meter unless its rear case and
battery cover is securely fastened in its original
position.
1.2.14 Do not store or use the meter in areas exposed
to direct sunlight, at high temperature or with
high relative humidity.
CAT III Overvoltage (Installation) category III, Pollution
Degree 2 per IEC1010-1 refers to the level of
Impulse Withstand Voltage protection provided.
opening the rear case and battery cover of the meter.
1.4.3 To avoid any electric shock caused by error
readings, replace the batteries immediately when
the “ ” sign appears on the display.
1.4.4 Use damp cloth and mild detergent to clean the
meter; do not use abrasives or solvents.
1.4.5 Turn the rotary selector to OFF position to switch
off the power when the meter is not in use.
1.4.6 Remove the batteries to avoid damages to the
meter if it will idle for a long time.
2. Description
- This meter is a portable professional measuring instrument
with LCD and back light easily reading. The 'single-hand
operation' design for the range switch makes measurement
simple and easy. Overload protection and low battery
indication are provided. It is an ideal multi-function
Instrument with scores of practical applications for
professional, workshop, school, hobby and home use.
- The meter can perform measurements of AC/DC voltage
and current, resistance, frequency, duty, capacitance, as
well as continuity and diode test.
- Both auto range and manual range are available.
- This meter is equipped with reading hold function.
- This meter is equipped with true root mean square value
measuring function (at AC A and AC V range).
- This meter is equipped with inrush current measuring
function.
- This meter is equipped with auto zero function
(at DCA range).
- This meter is equipped with maximum value measuring
function.
- This meter is equipped with minimum value measuring
function.
- This meter can measure frequency by clamp.
- This meter has function of auto power off.

09 1 0
3. Specifications
Calibration is required once a year, to be carried out at
a temperature between 18°C and 28°C (64°F to 82°F)
and relative humidity below 75%.
3.1 General Specifications
3.1.1 Auto range and manual range options are available.
3.1.2 Over range protection is provided for all ranges.
3.1.3 Maximum voltage between terminals and earth
ground: 600V DC or rms AC
3.1.4 Operating altitude: max. 2000 meters (7000 ft.)
3.1.5 Display: LCD
3.1.6 Maximum value display: 6599 digits
3.1.7 Polarity indication: automatic; ‘-’ for negative
polarity.
3.1.8 Over range indication: ‘0L’ or ‘-0L’
3.1.9 Sampling Time: approx. 0.4 second per sample
3.1.10 Unit indication: function and unit.
3.1.11 Auto power off time: 30 min.
3.1.12 Operating power : 1.5V×3 AAA batteries
3.1.13 Battery low indication: ‘ ’ on LCD
3.1.14 Temperature factor: < 0.1×Accuracy /°C
3.1.15 Operating temperature: 0°C to 40°C(32°F to 104°F)
3.1.16 Storage temperature: -10°C to 50°C(10°F to 122°F)
3.1.17 Dimension: 208×78×35mm
3.1.18 Weight: approximate 340g(including batteries)
3.2 Electrical Specifications
Ambient temperature: 23±5°C Relative humidity: < 75%
3.2.1 TRUE RMS
3.2.1.1 For measuring non-sinusoidal waveforms, test
error which is occurred by using True RMS
measurement techniques is less than by using
traditional average-reading techniques.

13 1 4
3.2.7.2 By V range:
Accuracy
Resolution
0.1Hz
0.001kHz
Range
660Hz
6.6kHz
0.01kHz 10kHz
>10kHz Take it only as referance
±(1.5% of rdg + 5 digits)
- Measurement range: 10 ~ 10kHz
- Input voltage range:>0.2V rms AC (higher input
 voltage at higher frequency)
- Input impedance: 10MΩ
- Max. input voltage: 600V rms AC
3.2.8 Duty Cycle
Accuracy
Resolution
0.1%
Range
10 - 95% ±3.0%
3.2.8.1 By A range ( from current clamp):
- Frequency response: 10 ~1kHz
- Input current range:>1A rms AC (higher input current
at higher frequency)
- Max. input current: 600A
3.2.8.2 By V range:
- Frequency response: 10 ~ 10 kHz
- Input voltage range:>0.2V rms AC (higher input
voltage at higher frequency)
- Input impedance: 10MΩ
- Max. input voltage: 600V rms AC
Accuracy
Resolution
0.1Ω
0.001kΩ
Range
660Ω
6.6kΩ
0.01kΩ 66KΩ
0.1kΩ
660kΩ
±(1.2% of rdg + 2digits)
0.001MkΩ 6.6MΩ
0.1MΩ66MΩ
- Open circuit voltage: 0.4V
- Overload protection: 250V DC or rms AC
3.2.9 Resistance
±(2.0% of rdg + 5digits)
3.2.10 Diode
Function
Resolution
Range
displaying approximate
forward voltage of diode
0.001V
- Forward DC current~1mA
- Reversed DC voltage~3.3V
- Overload protection: 250V DC or rms AC
Resolution
Range
Built-in buzzer will sound,
if resistance is lower than
30.
0.1Ω
- Open circuit voltage~1.2V
- Overload protection: 250V DC or rms AC
3.2.11 Continuity
0.01kHz
Function