Resistance Testing; Diode Testing - Surtek MUL04 Manual De Usuario Y Garantía

3. RESISTANCE TESTING (see Fig. 3)
WARNING: To avoid damages to
the Meter or to the devices under test,
disconnect circuit power and discharge
all the high-voltage capacitors before
measuring resistance.
Never attempt an in-circuit current
measurement where the open circuit
voltage between terminals and ground
is greater than 60 V DC or 30 V AC rms.
The resistance ranges are: 200.0 Ω, 2.000
kΩ, 20.00 kΩ, 200.0 kΩ, 2.000 MΩ and
20.00 MΩ.
To measure resistance, connect the
Meter as follows:
a. Insert the red test lead into the W
terminal and the black test lead
into the COM terminal.
b. Set the rotary switch to an appropriate measurement position in Ω range.
c. Connect the test leads across with the object being measured.
The measured value shows on the display.
NOTE
• The test leads can add 0.1Wto 0.2W of error to the resistance measurement. To
obtain precision readings in low-resistance, that is the range of 200W, short-
circuit the input terminals beforehand and record the reading obtained (called
this reading as X). (X) is the additional resistance from the test lead. Then use
the equation:
"Measured resistance value (Y) – (X) = precision readings of resistance.".
• When the resistance reading
for loose test leads or other reasons.
• For high resistance (>1 MΩ), it is normal taking several seconds to obtain a stable
reading, and it is better to choose shorter test lead.
• When there is no input, for example in open circuit condition, the Meter displays "1".
• When resistance measurement has been completed, disconnect the connection
between the testing leads and the circuit under test.
4. DIODE TESTING (see Fig. 4)
WARNING: To avoid possible damage to the Meter and to the device under test,
disconnect circuit power and discharge all high-voltage capacitors before testing
diodes and continuity.
Never attempt an in-circuit current
measurement where the open circuit
voltage between terminals and ground
is greater than 60 V DC or 30 V AC rms.
Use the diode test to check diodes,
transistors, and other semiconductor
devices. The diode test sends a current
through the semiconductor junction,
then measures the voltage drop across
the junction. A good silicon junction
drops between 0.5 V and 0.8 V.
To test a diode out of a circuit, connect
the Meter asfollows:
a. Insert the red test lead into the
terminal and the black test lead
into the COM terminal.
b. Set the rotary switch to
32
0.5 Ω in the short-circuit condition, please check
.
Fig. 3
Fig. 4