Operation Manual

GMC-I Messtechnik GmbH 35
Measurements: V/Hz – Ω – – Temp – – m – A/Hz
5.5 Diode Testing with 1 mA Constant Current
Ð Disconnect supply power from the electrical circuit of the
device to be measured, and discharge all high-voltage
capacitors.
Ð Make sure that the device under test is voltage-free.
Interference voltages distort measurement results!
Refer to chapter 5.1.1 regarding testing for the absence of
voltage with the help of the direct voltage measurement.
Ð Set the rotary switch to “R
SL
” or “ ”.
Ð Repeatedly press the FUNC | ENTER key until the diode
symbol appears at the display.
Ð Connect the device under test as shown.
Conducting Direction and Short-Circuit
The instrument displays the conducting-state voltage in volts
(display: 4 places). As long as voltage drop does not exceed the
maximum display value of 5.1 V, several series connected com-
ponents or reference diodes can be tested with a small reference
voltage and Zener diodes.
Reverse Direction and Interruption
The measuring instrument indicates overload 0L.
Note
Resistors and semiconductor paths connected in parallel to
the diode distort measurement results!
COM mA A
V
Tem p
Ω
aEb
Forward Direction Reverse Direction
0V !
0.654
0.L
to 5.100 V
Measuring range:
+
–
0.443
V
!
000.8
Ω
DC
FUNC
ENTER
R
SL