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9.5 NCV AC Electric Field Sensing (Picture 6a)
The electric eld sensing sensitivity is divided into two levels (“EFHI” and “EFLo”). The meter defaults to “EFHI”. Users can
select dierent sensitivity levels according to the intensity of the measured electric eld. Select “EFHI” of NCV when electric
eld is around 220V AC 50Hz/60Hz. Bring the NCV sensing end close to a charged electric eld (socket, insulated wire, etc.).
The LCD will display the segment “-” with beeps and red LED ashing. As the intensity of the measured electric eld increases,
the more segments (----) display, the higher frequency of buzzer beeps and LED ashes. Select “EFLo” when the electric eld
is around 110V AC 50Hz/60Hz.
Caution:
Use the NCV sensing end to approach measured electric eld, otherwise the measurement sensitivity will be aected. When
the measured electric eld voltage is over 100V AC, observe whether the conductor is insulated to avoid personal injury.
9.6 Others
• Auto power o: The meter will automatically power o to save power if there is no operation for 15 min. You can wake it up
by pressing any button or restart it after turning the switch to OFF.
• Press and hold the SELECT button in o state and then turn on the meter again to disable the auto power o function.
Restart the meter after shut it down to resume this function.
• Buzzer: When any button is pressed or the function switch is turned, if it is valid, the buzzer will make one beep (about
0.25s). The buzzer will also beep intermittently to indicate the over range during the voltage or current measurement.
• Low battery detection: The battery voltage will be automatically detected as long as the meter is on. If it is lower than 2.6V,
the LCD will display the “ ” symbol.
• Low battery shutdown function: When the battery voltage is lower than 2.5V, the LCD displays the “ ” symbol, the “Lo.bt”
interface appears and lasts for about 10s, the buzzer makes consecutive beeps 3 times, and then the meter automatically
shuts down (no interface is displayed).
10. Probe usage
TESTING IN CAT III MEASUREMENT LOCATIONS
Ensure the test lead shield pressed rmly in place. Failure to use the CAT III shield increases arc-ash risk.
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