Gossen MetraWatt METRA HIT MULTICAL Operating Instructions Manual page 33

5.5 Diode Testing with Constant Current of 1 mA
➭ Disconnect supply power from the electrical circuit of the
device to be measured, and discharge all high-voltage
capacitors.
➭ Make sure that the device under test is voltage-free.
Interference voltages distort measurement results!
Refer to section 5.2.1 regarding testing for the absence of volt-
age with the help of the direct voltage measurement.
➭ Set the rotary switch to
➭ Connect the device under test as shown.
!
Attention!
Observe open-circuit voltage of 7 V during diode testing.
Circuits must be laid out accordingly.
Forward Direction and Short-Circuit
The instrument displays forward voltage in volts (display:
4 places). As long as voltage drop does not exceed the maximum
display value of 6 V, several series connected components or
reference diodes can be tested with a small reference voltage and
Z-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!
GMC-I Messtechnik GmbH
.
V/Hz, , Temperature,
1.8569
!
0 V !
Measuring range:
+
to 6 V
0.654
Forward Direction
and A/Hz Measurements
DC
V
+ – +
–
0.L
Reverse Direction
33