2. Technical performance:
A, the basic function
A key operation, the automatic shutdown.
Shut off the current only about 20 na.
Using 8 mh crystals.
Can automatically detect NPN and PNP bipolar transistor, n-channel and p-channel MOS field effect tube, junction field-effect tube, diode, double diode, small power ChanXiangJing brake pipe and bidirectional thyristor.
Automatic identification of components of pin configuration.
Measurement of the bipolar transistor current amplification coefficient and the base - emitter threshold voltage.
Through the base - the threshold of the emitter voltage and high current amplification factor identification darlington transistors.
Can detect the protection of the bipolar and MOS transistor diode.
Measurement of MOS field effect tube grid threshold voltage and gate capacitance.
Can be measured at the same time two resistance and resistance to symbols displayed. On the right shows with four decimal values. Resistance symbols on both sides of the display pin number. Can therefore be measured potentiometer. If the potentiometer sliding side will not be transferred to an extreme position, can distinguish between the intermediate and pins at both ends.
The resolution of the resistance measurement is 0.1 ohms, can measure up to 50 m ohm.
Can measure capacitance. Displayed, with a capacitance symbol on the right shows values, can be displayed with four decimal values. Mf capacitance can be measured 30 pf - 100 resolution 1 pf.
More than 2 uf capacitance can simultaneously measure the equivalent series resistance of the ESR value. Can be displayed with two decimal values, resolution 0.01 ohms.
Can be in the right order and diode symbols show two diode, the diode forward voltage are presented also.
LED by testing for the diode, the forward voltage is higher. Dual function of leds were identified as two diodes.
Reverse breakdown voltage below 4.5 V zener diode can be identified.
To measure a single diode reverse capacitance. If the connection is the base and the collector of the bipolar transistor or emitter of a pin, also can measure the collector node or launch a reverse capacitor.
A single measurement can get connection mode of rectifier bridge.
Although the capacitance measuring lower limit is 25 pf, but you can by at least 25 with the measured capacitance pf measure known capacity of capacitors in parallel, and then from the measuring results of shunt capacitance minus
To the results.
B. extensions (through the menu selection, and the user may want to add a small amount of components, suitable for DIY)
1. Can be measured 1 hz to 2 MHZ. More than 25 KHZ 1 hz resolution, low frequency measurement by cycle, resolution can reach 0.001 MmHz.
2. Can be measured below 50 v dc voltage.
3. Can produce 1 hz - 2 MHZ square wave signal.
4. Can have a fixed frequency and pulse width variable pulse wave, short button width increasing at 1%, a long button width increasing by 10%.
5. Can through the menu to start a separate function of capacitance and ESR, range 2 uuf - 50 mf, due to the measurement signal