Mastech MY64 OPERATOR’S MANUAL

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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

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Mastech MY64 Digital Multimeter