Performing Diode And Continuity Test - Agilent Technologies U3401A User's And Service Manual

Performing Diode and Continuity Test

Testing diodes
The diode test measures the forward voltage of a semiconductor junction
of approximately 0.5 mA. The beeper will emit a single beep tone when
the input voltage is below +0.7 V (approximately 1.4 k ) and emits a
continuos beep tone when the input voltage is below 50 mV
(approximately 100
The measurement value will display OL (overload) when voltage measured is
N O TE
• >1.2 V at slow measurement rate
• >2.5 V at medium and fast measurement rate
Disconnect circuit power and discharge all high-voltage capacitors before testing
CAU T ION
diodes to avoid damaging the multimeter.
To test a diode, switch the circuit power off, and remove the diode from
the circuit. Then proceed as follows:
1 Press
2 Connect the red and black test leads to the input terminal as shown in
3 Connect the red test lead to the positive terminal (anode) of the diode
U3401A User's and Service Guide
• Measurement method:
• Continuity threshold :
• Input protection:
to toggle the diode and continuity function. The default
function is diode measurement.
Figure 2- 7 and Figure 2- 8
and the black test lead to the negative terminal (cathode). Refer to
Figure 2- 8.
).
0.83 mA±0.2% constant current source, open-circuit voltage
limited to <5 V
10 Ω fixed
500 V DC or AC RMS
respectively.
Operations and Features 2
27