Mastech MY-63 User Manual [nl]

OPERATOR’S

MANUAL

DIGITAL

MULTIMETER

⊙

○

MY-60

MY-61

MY-63

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○

MY-60T

MY-62

MY-64

1. INTRODUCTION

This MY-60 Series Digital Multimeter is a compact precision, battery operated, LCD display 3-½ digits Digital Instrument. Superiority:

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 “ 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

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

” is displayed when the battery voltage drops below the

Range

200mV

20V

200V

1000V

MY-60 MY-60T MY-61 MY-62 MY-63 MY-64

Accuracy

0.5%±1

0.5%±2

0.8%±2

Input impedance: 10MΩ on all range

2) ACV

Range

200mV

20V 200V 700V

MY-60 MY-60T MY-61 MY-62 MY-63 MY-64

1.2%±3

Accuracy

0.8%±3

Input impedance: 10MΩ Frequency range: 40 ~ 400Hz

3) DCA

Range

20uA

200uA

2mA

20mA

200mA

10A

MY-60 MY-60T MY-61 MY-62 MY-63 MY-64

2.0%±5

1.0%±2

1.5%±3

Accuracy

1.0%±2

1.2%±2

2.0%±3

Measuring voltage drop: 200mV

4) ACA

Range

200uA 1.2%±3

2mA

20mA

200mA

10A

MY-60 MY-60T MY-61 MY-62 MY-63 MY-64

1.5%±3

2.0%±3

Accuracy

1.5%±3

3.0%±3

Measuring voltage drop: 200mV Frequency range: 40 ~ 400Hz

5) CAPACITANCE

Range

200nF

MY-60 MY-60T MY-61 MY-62 MY-63 MY-64

2nF 20nF

2uF 20uF

Accuracy

4.0%±3

6) OHM

Range

200

20K

200K

20M

200M

MY-60 MY-60T MY-61 MY-62 MY-63 MY-64

Ω

7) TEMPERATURE (MY-60T/MY-62/MY-64 only)

Range

-20℃ ~ 400

400℃ ~ 1000

℃

Accuracy

1.0%±10

1.0%±3

1.0%±5

5.0%±20

MY-60T MY-62 MY-64

Accuracy

0.75%±3

1.5%±15

With K-type thermocouple wire

8) FREQUENCY TEST(MY-63 & MY-64 only)

Range

2KHz

20KHz

Accuracy

MY-63 MY-64

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

V/OHM COM

ACV 2~700V 700VAC

OHM V/OHM COM Freq. V/OHM/Hz COM

250V DC/AC

Diode V/OHM COM DCA 200mA ACA 200mA

DCA 2A

ACA 2A DCA10A ACA10A

A COM

200mA DC/AC

2A DC/AC

10A DC/AC10A COM

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 A CIT ANCE MEA SUREMENT

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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