Mastech MS2138/R Operation Manual
MS2138/R
AC/DC DIGITAL CLAMP METER
OPERATION MANUAL
AUTO
%
40302010
0
REL
DC
AC
MK
Hz
Ω
mnVAF
μ
FUNC.
RANGE
HOLD
Hz/%
REL
AUTO-POWER OFF
600V CAT III
MAX100
A
600V
CAT III
MAX 600 V
COM
VΩ
Press 2 Sec
Ω
V
OFF
100
40/400
MS21 38
A
V
A
AC/DC CLAMP METER
Auto Range
CAT III
600 V
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CONTENTS CONTENTS
1. Safety Information.............................1
1.1 Preliminary...............................................1
1.2 During Use...............................................2
1.3 Symbols...................................................3
1.4 Maintenance............................................4
2. Description........................................4
2.1 Names Of Parts........................................5
2.2 Switch, Buttons And Input Jacks...............7
2.3 LCD (Liquid-Crystal Display)....................7
3. Specifications...................................9
3.1 General Specifications.............................9
3.2 Technical Specifications.........................10
4. Operation Instruction......................15
4.1 Holding Readings...................................15
4.2 Switching REL........................................15
4.3 Switching Frequency Or Duty..................16
4.4 Switching Manualrange
Or Auto Range ..................................16
4.5 Switching Functions.................................17
4.6 Back Light And Clamp Lighting Bulb..........17
4.7 Auto Power Off.........................................18
4.8 Preparing For Measurement.....................18
4.9 Measuring AC Current .............................19
4.10 Measuring DC Current ...........................20
4.11 Measuring AC Voltage ............................21
4.12 Measuring DC Voltage ...........................21
4.13 Measuring Frequency ............................22
4.14 Measuring Duty .....................................24
4.15 Measuring Resistance............................27
4.16 Testing Diode.........................................28
4.17 Testing Continuity...................................29
4.18 Measuring Capacitance .........................29
5. Maintenance......................................30
5.1 Replacing The Batteries............................30
5.2 Replacing Test Leads ...............................31
6. Accessories.......................................31
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03 04
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.
1.3 Symbols
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
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.
- 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.
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.
Application around and removal from UNINSULATED
HAZARDOUS LIVE conductors is permitted.
Direct current
Alternating current
CAT III: MEASUREMENT CATEGORY III is applicable to
test and measuring circuits connected to the distribution
part of the building's low-voltage MAINS installation.
2. Description
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