Mastech MY70 User Manual

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3. Operating guidance
3.1 General operation
3.1.1 Reading maintenance mode
In reading maintenance mode, the current readings will be
kept on the display. Change the measurement function grade,
or press HOLD key to exit reading maintenance mode.
To enter and exit reading maintenance mode:
1. Press “HOLD” key, the reading will be maintained and
“ ”symbol will display on LCD display simultaneously.
2. Press “HOLD” key again to return the meter to normal
measurement state.
3.1.2 Battery saving energy function
The meter power will disconnect automatically after about
40 minutes, to save battery power.
3.2 Measuring guidance
3.2.1 Measuring AC and DC voltage
To prevent electrical shock and/or meter damage. Don’t
measure any RMS voltage higher than 600V DC or 600V AC
between common end and ground.
Voltage is the potential difference between two points.
AC voltage polarity changes over time, while DC voltage
polarity does not change over time.
DC voltage measuring range of this meter: 200.0mV, 2.000V,
20.00V, 200.0V and 600V; AC voltage measuring range of this
meter: 200mV (only for MY70), 2.000V, 20.00V, 200.0V and 600V.
To measure AC and DC voltage:
1. Rotate the switch to the appropriate position.
2. Respectively connect black and red test probe to COM input
socket and V input socket.
3. Measure the voltage of circuit to be tested with other two
ends of test probes. (Connected with the circuit to be tested
in parallel)
4. Read the measuring voltage value from LCD display.
When measuring DC voltage, the display will simultaneously
show the voltage polarity which is connected with red test
probe.
In the DC 200mV and AC 2V measuring range, the meter will
have a number of displays even without input or connecting
with test probe. In this case, just make a short circuit between
“V-” and “COM”, so that the meter will display zero.
• Note:
3.2.2 Measuring resistance
To avoid damaging meter or device to be measured, before
measuring resistance, cut off all circuits being tested and
discharge all high voltage capacitors.
Resistance is resistance force of current. The unit of resistance
is ohm ( Ω ).
Resistance range of this meter: 200.0Ω, 2.000kΩ, 20.00kΩ,
200.0kΩ, 2.000MΩ, 20.00MΩ, 200.0 MΩ.
To measure resistance:
1. Rotate switch to the appropriate position.
2. Respectively connect black and red test probe to VΩ input
socket and V input socket.
3. Measure the resistance value of circuit to be tested with
other two ends of test probes.
4. Read the measuring resistance value from LCD display.
WARNING:
WARNING:

Mastech MY70 Specifications

General

Brand	Mastech
Model	MY70
Category	Multimeter
Language	English