Technical data

94 U1401A User’s and Service Guide
5 Application Examples
Zener Diode Test
To perform zener diode test:
1 Turn the rotary switch to the / position.
2 Connect the red alligator lead between the positive output
terminal and the positive (anode) side of the zener diode.
See Figure 5- 5 on page 95.
3 Connect the black alligator lead between the negative
output terminal and the negative (cathode) side of the
zener diode.
4 Connect the red and black probe leads to the input
terminals.
5 Output a constant current of +1 mA, then measure the
forward voltage of the zener diode.
6 Output a constant current of –1 mA, then measure the
breakdown voltage of the zener diode.
CAUTION
To avoid damaging the instrument, disconnect the circuit power and
discharge all high-voltage capacitors before testing the diodes.