Mastech MY70 User Manual

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• To improve the accuracy below 2nF, subtract the distributed
capacitance of meter and cable.
3.2.6 Transistor measuring
1. Rotate the switch to hFE position.
2. Plug multi-function socket with correct polarity (the “+” end
of multi-function socket is connected with mA end, “COM”
end is connected with common end).
3. Determine that the transistor is NPN or PNP type, then insert
three pins of transistor to the corresponding holes of the
dedicated multi-functional socket
4. Read hFE approximation of transistor to be measured from
LCD display.
3.2.7 Measuring frequency (MY74, MY74B)
To prevent electrical shock and/or meter damage. Don’t
measure the frequency of RMS voltage higher than 250V DC
or AC.
To measure frequency:
1. Rotate the switch to Hz position.
2. Respectively connect black and red test probe to COM
input socket and Hz input socket.
3. Measure the frequency value of circuit to be tested with
other two ends of test probes.
4. Read the measuring frequency value from LCD display.
3.2.8 Measuring temperature (MY74, MY74B)
Don’t measure the surface of object with electric quantity
higher than 60V DC or 24V AC RMS, to prevent electrical
shock. Don’t measure the temperature in a microwave oven
to prevent fire or meter damage.
3.2.9 Measuring current
When the ground voltage of open circuit voltage exceeds 250V,
do not try to make current measurements on the circuit. If the
fuse is blown when making a measurement, you may damage
the meter or injure yourself. To avoid damage to meter or
device, before measuring current, please check the meter's
fuse. When measuring, you must use the correct input socket,
function and measuring range. When the test probe is inserted
to the current input socket, don’t connect the other end of the
test probe with any circuit in parallel
WARNING:
WARNING:
WARNING:
To prevent electrical shock and/or meter damage. Don’t apply
any RMS voltage higher than 250V DC or AC between common
end and mA end,
WARNING:
To measure temperature:
1. Plug the red end of the K-type thermocouple into the
“ ”jack and black end into the“COM”jack.
2. Set the rotary switch to the“Temp”position.
3. Touch the surface of the object or area with the
temperature sensor for measurement.
4. Read the measuring value from LCD display.
VtempΩ Hz
Current range of this meter: 20μA/200μA (only for MY70)
2.000mA, 20.00mA, 200.0mA and 10.00A;

Mastech MY70 Specifications

General

Brand	Mastech
Model	MY70
Category	Multimeter
Language	English