Testing Transistors; Measuring Capacitance - Kopp GDT-292 A Manuel D'utilisation

Testing Transistors hFE
1. Set the function switch at hFE position.
2. Identify whether the transistor is NPN or PNP type and
locate emitter, base and collector lead. Insert leads of the
transistor to be tested into proper holes of the testing
socket on the front panel.
3. LCD display will show the approximate hFE value at the test
condition of base current 10µA and Vce 3.2V.
Measuring Capacitance (Only on models GDT-293A and GDT-
295A)
1. Set the function switch at the nF or µF position to be used.
2. For model GDT-293A, insert the leads of the capacitor into
the terminal marked "Cx" or connect the black and red test
leads across the capacitor. Verify the correct polarity.
3. For model GDT-295A, connect the black lead to the COM
jack and the red lead to the input marked "Cx". Note: the
polarity of the red lead connection is positive (+).
Note:
1. When checking in-circuit capacitance, be sure that the
circuit has all power removed and all capacitors are fully
discharged.
2. For model 295A, only two manually selected capacitance
measurement ranges (326nF, 32.6µF) are provided.
3. If Range Control Button is used in this measuring function,
decimal points may be at incorrect positions.
4. At the nF range, when the capacitor to be measured is not
connected to test leads, the LCD may not read zero, but a
few counts. Subtract these counts from measured results.
22