Emos MD-510, Руководство пользователя

Страница: 5 / 72

5
Note: The multimeter goes through an initialisation process before starting non-contact
AC voltage detection. During this process, it will not respond to the pressing of the "SELECT"
button. If you want to switch functions, press the "SELECT" button only after the initialisation
process is complete (the screen will show "
", the buzzer will not sound).
Auto Check Mode
When in Auto Check mode, the multimeter automatically chooses between measuring DC
voltage, AC voltage or resistance based on the input coming in through the test probes.
1. With no output, the screen will show " Auto ---- ".
2. Without incoming voltage signal but with resistance under 10 MΩ, the screen will
display the resistance value.
3. With signal ≥ DC 1.2 V or AC 1.5 V, the screen will display the DC or AC voltage based
on the higher peak level.
4. Alarm upon overload: If the output is ≥610 V, the built-in buzzer will begin beeping
and the screen will show "OL".
Continuity Test
While in Auto Check mode, press the "SELECT" button once to switch to the continuity
test function.
Connect the test probes to the circuit you wish to test.
If resistance is higher than 150 Ω, the built-in buzzer will not sound and the screen will
display " ".
If resistance is lower than approx. 50 Ω, the buzzer will sound without interruption and
the screen will switch from "
" to " ".
If resistance is between 50 Ω and 150 Ω, the buzzer may or may not sound and the image
on the screen will change depending on the buzzer's response.
Note: Before testing, disconnect all power supply from the circuit you wish to test and thor-
oughly discharge all capacitors.
Non-contact AC Voltage Detection
While in Auto Check mode, double press the "SELECT" button. The built-in buzzer will
beep and the centre of the screen will show four chart segments from right to left to
indicate the intensity of the electrical field
. Then, the segments will descend to
a lower level on the screen . The buzzer will now go quiet; the multimeter is in
non-contact detection mode.
Move the upper left corner of the multimeter closer to the object you are testing. When
the multimeter detects an electrical field generated by AC voltage, it will indicate its
intensity as follows:
The intensity of the electrical field is indicated by the number of chart segments located
in the centre of the screen and by the beeping of the built-in buzzer.
The higher the intensity of the detected electrical field, the higher the number of seg-
ments that appear in the centre of the screen and the faster the beeping of the buzzer.
Note:
1. Detection range: 50–600 V, frequency response: 50 Hz/60 Hz.
2. The upper left corner of the meter (marked on the rear of the meter as "EF") is the
optimal location for non-contact measurement of AC voltage.
3. The meter's indication of the intensity of the electrical field is affected by the AC
voltage range of the tested conductor, the distance of the multimeter from the
conductor, the insulation on the conductor and other factors.
4. Due to the detection limit of the multimeter, the tested conductor should be active
even if the meter does not indicate the presence of an electrical field.
5. Test that the multimeter functions properly before use by detecting known AC
voltage.
6. Do not touch any conductors to avoid electric shock.
AC Voltage Measurement Function
While in Auto Check mode, press the "SELECT" button three times to switch to the AC
voltage measurement function. The screen will display the "~" symbol and the voltage
measurement unit.
Connect the test probes to the voltage source you wish to test.
The screen will show the measured value.
Note:
1. Measurement range: 0 to 600 V AC.
2. To prevent electric shock and damage to the device, do not connect the multimeter
to voltages higher than 600 V.
3. If the input voltage is ≥ 610 V, the built-in buzzer will beep and the screen will
show "OL".