5. Operating instruction
5.1. Testing the Unit Prior to Use
1. Make sure that the unit has been turned off, then turn the power switch/sensivity knob forwards until
a click is heard. The built-in buzzer sounds two beeps, meanwhile the detection indicator LED flashes red
twice. Now the unit’s sensivity is at the highest level.
Note:
After you turn on the unit, the detection indicator LED will flash red periodically as a high battery indi-
cation if the batteries are high enough. If the detection indicator LED does not flash periodically even if
there is no ac voltage being detected, the batteries are low and must be replaced immediately.
2. Move the unit’s probe close to a known ac power source (such as an outlet). If the built-in buzzer beeps
and the detection indicator LED flashes red, the unit is good and cen be used.
5.2. Detecting AC Voltage
1. Turn the power switch/sensivity knob forwards until a click is heared to turn on the unit. Then adjust
this knob for a desired sensivity according to the need of the actual detection task.
2. Move the unit’s probe close to the wire or socket to be tested. When the unit detects ac voltage, the
built-in buzzer will beep and the detection indicator LED will flash red. If the voltage to be detected is low,
you should set the unit’s sensivity to the highest level; and if you want to locate a breakpoint on a live line,
you should lower the unit’s sensivity appropriately.
3. Decrease the unit’s sensivity, then insert the unit’s probe into an AC110V power socket’t two terminals
to be dicriminated between. If both the two terminals can cause the detection indicator LED to flash red,
you must decrease the unit’s sensivity and than try again. Repeat this procedure until only one terminal
can cause the detection indicator LED to flash red, this terminal is Live terminal and the other terminal is
Neutral terminal.
Note:
1. Before detection, you must adjust the unit’s sensivity according to the need of the actual detection
task. The higher the unit’s sensivity, the longer the unit’s detection distance. But detection will likely be
interfered with by the electric field or electromagnetic field in environment if the sensivity is set too high.
It is recommended to set the sensivity to the lowest level first, then increase it gradually to the desired
level according to the need of the actual detection task if necessary.
2. The unit can be used to trace a live wire to locate the breakpoint on this wire. The position where the
unit stops giving alarm is probably where the breakpoint exists.
3. When you move the unit’s probe close to an object with static charge, the unit may give alarm; and when
you move the unit’s probe close to an iron object near which there is ac current, the unit may also give
alarm.
