SEFRAM 98 Manuel D'utilisation page 31

(4) Diode Measurement
Diode measurement mode shares the same
configuration with 4000V manual voltage
measurement mode.
If the test circuit is open or the voltage drop between
the two ports of the device (diode) under test are
larger than 2V, the LCD will show "OL".
The buzzer generates a 2kHz sound whenever the
digit number is less than 0.25V. Because the cycle
time of measurement is only 50ms, the least
significant digit will not display.
LINE 1
CONTINUITY
ONLY
LINE 2
POLARITY
(OFF)
Tone Generator
OFF
V
Ω
OFF
SEFRAM 98-GM
DMM
AutoRanging
CAT III
600V
- -
13
Diode