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5.5 Square Wave Output
1) Set the rotary switch to
range position.
2) Insert the black test lead banana plug into the negative
COM
jack, insert the red test
lead banana plug into the positive
V/
Ω
mA
jack.
3) The meter output square wave: frequency = 50Hz ±10Hz, Vp-p = 5V±2V, output
impedance = 560K
Ω
, the LCD display is insignificant.
5.6 NCV (Non-Contact Voltage) Detection
Due to external interference source, this function may cause wrong voltage detection, the
detection result is for reference only.
Set the rotary switch to
NCV
position, contact the top part of meter with the circuit under
test, the indicating LED will flash and audible signal will sound.
NOTE:
•
The detection result is for reference, do not determine the voltage by NCV detection
ONLY.
•
Detection may interfere by socket design, insulation thickness and other variable con-
ditions.
•
External interference sources, such as flashlight, motor, etc, may cause wrong detec-
tion.
5.7 LINE (Live Wire Recognition) Test
1) Set the rotary switch to
NCV/LINE
position.
2) Connect the black test lead in the
COM
jack and the red test lead to
V/
Ω
mA
jack.
3) Connect the red test lead to live wire. Do not connect the black test lead!
4) If the measured wire is live, a buzzer will sound and red LED light will flash.
Connecting to earth wire will not give any result!
5.8 Display Backlight
press the
button for 1 or 2 seconds to turn on or off the display backlit function, the
backlight will automatically turn off after 10 seconds.
5.9 Auto Backlight
In dark working environment, the LCD backlight will be activated automatically.