13
3)
To determine the triode’s type, NPN or PNP, insert the emitting base and collector electrode into
the corresponding jacks in testing accessory.
5-10.
Diode and open circuit test.
1)
Insert the black pencil into “COM” jack, and the red one into the “V/
Ω
/Hz” jack (Notice: the red
pencil is anode)
2)
Turn the range switch to position “
”, connect pencils In paralel to the diode tested, with
the red pencil to the anode and the black to cathode, then the reading value will be approximate
forward voltage drop of the diode.
3)
Connect pencils to two points of the circuit to be tested, if buzzer sounds, then the resistance
between the two points is lower than (70
±
20)
Ω
5-11.
Peak value holding
Press HOLD, the peak value of current data will be keep displaying in screen; press again to cancel
this function.
5-12.
Auto power off
After about (20
±
10) minutes device not being used, it will be powered off automatically and enter
into dormant status, and press “POWER” again for two times to turn on power.
5-13.
Backlight
Press “B/L” key to turn on backlight. After 20 seconds, the backlight will be turn down
automatically.
Notice:
When backlight is bright, working current becomes higher and it will short the service life of battery
and the error for some other functions will increase.
6. Device maintenance
This series of device is a kind of precise instrument, please do not change the internal circuit by
your self.
6-1.
Pay attention to the waterproof, dustproof and breakproof of the device.
6-2.
Please do not store or use it in environment of high temperature, high humidity, high
flammability or strong magnetic.
6-3.
Please clear the device using wet cloth and soft detergent, and abrasive and drastic solvent
such as alcohol are forbidden.
