UNI-T UT203 User Manual

C. Testing Diodes (see figure 5)
Warning
To avoid damages to the Meter or to the devices
under test, disconnect circuit power and discharge
all the high-voltage capacitors before testing
diodes.
Use the diode test to check diodes, transistors, and
other semiconductor devices. The diode test sends
a current through the semicondutor junction, then
measure the voltage drop across the junction. A
good silicon junction drops between 0.5V and 0.8V.
To test the diode out of a circuit, connect the Meter
as follows:
Insert the red test lead into the Hz Duty% terminal and the black test lead
into the COM terminal.
1.
(figure 5)
Red Black
Model UT203/204: OPERATING MANUAL
22

UNI-T UT203 Specifications

General

Frequency range	0.01 - 1000 kHz
AC current range	40 - 400 A
AC voltage range	4 - 600 V
Continuity check	Yes
DC voltage range	0.4 - 600 V
Basic accuracy (frequency)	±(0.1%+3)
Basic accuracy (DC current)	±(2%+3)
Basic accuracy (DC voltage)	±(0.8%+1)
Basic accuracy (resistance)	±(1%+2)
Dimensions (WxDxH)	76 x 30 x 210 mm
Battery voltage	9 V

Weight and Dimensions

Weight	200 g