Mastech MY-60, MY-61, MY-62, MY-63, MY-60T Operator's Manual
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MY-60
⊙
MY-60T
⊙
MY-61
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MY-62
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MY-63
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MY-64
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DIGITAL
MULTIMETER
OPERATOR’S
MANUAL
1. INTRODUCTION
This MY-60 Series Digital Multimeter is a compact precision, battery operated,
LCD display 3-½ digits Digital Instrument.
Superiority:
9 High accuracy
9 Large LCD display
9 Digital height 25mm
9 Single 32 position rotary switch for FUNCTION and RANGE
selection, allows fast and convenient operation.
9 Curvilinear mode soft case.
9 Colored indication jack with fully protection test leads.
9 Lower power indication & Auto-Power Off
2. GENERAL SPECIFICATION
1) Display: 3-½ digits LCD with a maximum reading of 1999.
2) Measurement rate: updates 2-3/sec.
3) Over range indication: “1” figure only in the display
4) Automatic negative polarity indication.
5) The “
” is displayed when the battery voltage drops below the
operating voltage.
6) Full range over load protection.
7) Capacitance measurement Auto-Zeroing.
8) Auto Power Off: It will be automatically cut off in about 15 minutes after
the power is turned on. It needs to be turned off and turned on again to
continue the power.
9) Operating temperature: 0°C~40°C, 0~75% R.H.
Storage temperature: -10°C~50°C, 0~75% R.H.
10) Power: Single standard 9V battery IEC 6F22,NEDA 1604, JIS 006P.
11) Dimensions: 189L*90W*34Hmm.
12) Weight: approx 230g (including battery)
13) Accessories: test leads (pair), K-type thermocouple wire (model
MY-60T/MY-62/MY-64 only), operator’s manual.
3. ELECTRICAL SPECIFICATIONS
Accuracy is given as ± (% of reading + number of least significant digits) for
one year, at 23°C±5°C RH<75%
1) DCV
MY-60 MY-60T MY-61 MY-62 MY-63 MY-64
200mV
2V
20V
200V
1000V
0.8%±2
Accuracy
Range
0.5%±1
0.5%±2
Input impedance: 10MΩ on all range
2) ACV
MY-60 MY-60T MY-61 MY-62 MY-63 MY-64
200mV
2V
20V
200V
700V
Range
0.8%±3
0.8%±3
1.2%±3
Accuracy
Input impedance: 10MΩ Frequency range: 40 ~ 400Hz
3) DCA
MY-60 MY-60T MY-61 MY-62 MY-63 MY-64
20uA
200uA
2mA
20mA
200mA
2A
10A
1.0%±2
1.0%±2
2.0%±3
Range
2.0%±5
1.2%±2
Accuracy
1.5%±3
Measuring voltage drop: 200mV
4) ACA
MY-60 MY-60T MY-61 MY-62 MY-63 MY-64
200uA 1.2%±3
2mA
20mA
200mA
2A
10A
3.0%±3
Range
Accuracy
2.0%±3
1.5%±3
1.5%±3
Measuring voltage drop: 200mV Frequency range: 40 ~ 400Hz
5) CAPACITANCE
MY-60 MY-60T MY-61 MY-62 MY-63 MY-64
2nF
20nF
200nF
2uF
20uF
Range
Accuracy
4.0%±3
6) OHM
MY-60 MY-60T MY-61 MY-62 MY-63 MY-64
200
Ω
2K
Ω
20K
Ω
200K
Ω
2M
Ω
20M
Ω
200M
Ω
1.0%±5
5.0%±20
Range
Accuracy
1.0%±10
1.0%±3
7) TEMPERATURE (MY-60T/MY-62/MY-64 only)
MY-60T MY-62 MY-64
-20℃ ~ 400
℃
400℃ ~ 1000
℃
Range
Accuracy
0.75%±3
1.5%±15
With K-type thermocouple wire
8) FREQUENCY TEST(MY-63 & MY-64 only)
MY-63 MY-64
2KHz
20KHz
Range
Accuracy
1.5%±10
Sensitivity: 100mV rms
4. PRECAUTIONS AND PREPA RA TIONS FOR MEASUREMENT
1) Be sure that battery is correctly placed in the battery case and
connected to the battery snap.
2) Don’t exceed the input limit shown below:
Function Range Input terminals Maximum input
DCV 200mV 250VDC
ACV 200mV 250VAC
DCV 2~1000V 1000VDC
ACV 2~700V 700VAC
OHM V/OHM COM
Freq. V/OHM/Hz COM
Diode V/OHM COM
DCA 200mA
ACA 200mA
DCA 2A
ACA 2A
DCA10A
ACA10A
10A DC/AC10A COM
V/OHM COM
250V DC/AC
A COM
200mA DC/AC
2A DC/AC
3) Inspect the test leads for damaged insulation or exposed metal. Check
Test lead continuity. Damaged leads should be replaced.
4) Select the proper function and range for your measurement.
5) Check the input terminal position for red test lead depends on
measurement ranges.
6) Either one of the test leads should be taken off from the circuit under
test when changing the test ranges.
7) To avoid electrical shock or damage to the meter; Do not apply more
then 500V between any terminal and earth ground.
8) To avoid electronic shock, use caution when working above 60VDC or
25VAC rms, such voltage pose a shock hazard.
9) When finished the measurement, switch off the power. Be sure to
remove the battery when it is not used for a long time to avoid leakage
problem.
10) Do not tamper with the circuitry to avoid damage.
11) Do not use or store the instrument in a place of direct sunlight, high
temperature and high humidity.
5. METHOD OF MEASUREMENT
5.1 DCV & ACV MASUREMENT
1) Set the Function range switch at the required position.
2) Connect black test lead to “COM” terminal and red test lead to the
“V/OHM” input terminal.
3) Connect test leads to measuring point and read the display value the
polarity of the red lead connection will be indicated at the same time as the
voltage.
Note:
a) If the voltage to be tested is unknown beforehand, set the
Function range switch to the highest range and work down.
b) When only the figure “1” is displayed over range is being indicated
and the function range switch has be set to a higher range.
c) Never try to measure the voltage above 1000V! Although the
indication is possible to show, there is danger of damaging the
internal circuitry.
5.2 DCA & ACA MEASUREMENT
1) Connect the black test lead to the “COM” terminal and the red test lead
to “A” terminal for a maximum of 0.5A (model MY-60 & MY-60T maximum
2A)
2) Set the function range switch at the required position.
3) Connect test leads to measuring points and read the display value. The
polarity at the red test lead connection will be indicated at the same time as
the current.
Note:
a) If the current range is unknown beforehand, set the function range
switch to the highest range and work down.
b) When only the figure “1” is displayed, over range is being
indicated and the function range switch has be set to a higher
range.
c) Excessive current will below the fuse that must be replaced when
the input is from “A” terminal. Fuse type is 0.5A (model MY-60 &
MY-60T maximum 2A).
d) A fuse does not protect the 10A range. Maximum 8A continuous,
maximum 10A measuring time must be less than 15 seconds.
5.3 RESISTA NCE MEASUREMENT
1) Connect black test lead to “COM” terminal and red test lead to the
“V/OHM” input terminal.
2) Set the function range switch to the OHM range.
3) Connect the test leads across the resistance under measurement and
read the display value.
Note:
a) The polarity of the red test lead is “+”.
b) When the input is not connected, i.e. at open circuit the figure “1”
will be displayed for the over range condition.
c) If the resistance value being measured exceeds the maximum
value of the range selected an over range indication “1” will be
displayed and function range switch must be set to a higher
range.
d) 200MΩ range has a 10 digits (1MΩ) constant, the figure will
appear in short circuit status it should be subtracted from
measurement result, for instance: when measuring 100MΩ
resistor, figure 101.0 will shown in display and the last 10 digits
should be subtracted.
5.4 CAP ACITANCE MEASUREMENT
1) Set the function range switch at the “Cx” position. Before connecting the
capacitor, the display that could be zeroed automatically slows.
2) Connect the test capacitor to the “Cx” input socket (not test leads) and
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