Diode Testing; Measuring Resistance - Urrea UD334 Manual De Usuario

E N G L I S H
in AC Amps, set the Meter display Zero
value by using the DC A Zero Adjustment
Switch before using the Peak Hold
function.

• MEASURING RESISTANCE

AND CONTINUITY TESTING
When measuring resistance, make
sure that the contact between the
test leads and the circuit under test
is good. Dirt, oil, solder, flux or other
foreign matter seriously affect the
reading value.
Follow these steps to measure
resistance and test continuity.
1. Insert the red test lead into the
VΩHz input terminal and black test
lead into the COM terminal.
2. Set the function switch to 400 Ω / .
With the leads open, the Meter
should display a
sign) on the LCD.
3. Short the leads and see that
the display reads ≤ 0.2Ω and the
continuity beeper sounds. If not,
check the test leads insertion or
position of the function switch again.
4. Touch the test leads to the circuit
under test and read the resistance
measurement in the display. A
reading of 15Ω or less will cause the
16
(the overload
continuity beeper to sound.

• DIODE TESTING

WARNING: NEVER CONNECT THE TEST
LEADS TO A SOURCE OF VOLTAGE (WHEN
THE FUNCTION SWITCH IS SET TO
In diode test, drop voltage in the
forward direction is displayed when
a diode is connected in the forward
direction. For a Germanium diode,
the typical forward voltage is about
0.4V and in case of a Silicon diode,
about 0.6V.
Judge the semiconductor device as
follows:
If the digital reading in one direction
shows a value and the reading in
reverse direction shows an overrange
sing , the device is in good
conditions.
Si es mostrado en pantalla en
ambas direcciones, el componente
está probablemente abierto.
If the digital reading is the same
in both directions, the device is
probably shorted.
If the display reads
directions, the device is probably
opened.
).
in both