9
2-3-11.
Measuring triode’s hFE parameter
Range
Display range
Test condition
hFE NPN lub PNP
0 ÷ 1000
Base electrode current is abort
10uA, and Vce is about 3V
5. Operation method
5-1. Operation panel introduction
1. LCD: display the measured value and the unit
2. Function keys
2-1. power switch: turn on/turn off power
2-2. PK HOLD: Pressing this key will hold all max value
measured in the screen showing sign “PH”; press again,
“PH” will disappear and exit the status of peak value
holding.
2-3. B/L switch to enable backlight which will be turned
off auto after about 5 seconds.
2-4. DC/AC: select DC/AC working mode.
3. Rotary switch: to change measurement function and
range.
4. Jack for measurement of voltage, resistance and frequency.
5. Common ground: positive input for capacitance (Cx), inductance (Lx), triode and temperature.
6. Positive jack for current lower than 200mA; negative input for capacitance (Cx), inductance (Lx),
triode and temperature.
7.Jack for current 20A. Please refer to the figure.
5-2. Voltage measurement
1) Insert the black pencil into the “COM” jack, and the red one into the “V/
Ω
/Hz” jack.
2) Turn the switch to position “V”. If the level of voltage to be measured is unknown then select the
biggest range and then decrease the range step by step until getting the value with the highest
resolution.
