Current Measurements - Urrea UD87 Manual De Usuario

Silicon controlled rectifiers (SCRs) and other
semiconductor devices. The test sends a
current through a semiconductor junction,
then measures the junction's voltage drop.
Measurement:
Menu key:
Connect leads:
Primary display:
Secondary display:
Normal forward voltage drop (forward
biased) for a good Silicon diode is between
0.4V to 0.9V. A reading higher than that
indicates a leaky (defective) diode. A zero
reading indicates a shorted (defective) diode.
An indicates an open diode (defective).
Reverse the test leads connections (reverse
biased) across the diode. The display shows
if the diode is in good conditions. Any
other readings indicate the diode is shorted
or resistive (defective).
Temperature (Temp)
Measurements
WARNING:
THERMOCOUPLE TO CIRCUITS EXCEEDING
30V RMS 42.4V PEAK OR 60V DC.
Measurement:
Diode
(no selection)
(fig. E)
V
-
DO NOT APPLY
Celsius Temperature
(default)
Menu key:
Connect leads:
Primary display:
Secondary display:
Measurement:
Menu key:
Connect leads:
Primary display:
Secondary display:
*Be sure to insert the banana plug k-type
temperature bead probe with correct "+" "-"
polarities. You can also use a thermocouple
probe adapter (optional) to adapt other
standard k-type temperature probes.
Current ( , ) Measurements
WARNING: NEVER ATTEMPT AN IN-
CIRCUIT CURRENT MEASUREMENT WHERE
THE OPENED CIRCUIT POTENTIAL TO f IS
GREATER THAN 1000V. YOU MAY DAMAGE
THE METER OR RESULT INJURED IF THE FUSE
BLOWS DURING SUCH A MEASUREMENT.
CAUTION: CHECK THE METER FUSES
BEFORE MEASURING CURRENT. USE THE
PROPER TERMINALS,
RANGE FOR CURRENT MEASUREMENTS.
NEVER PLACE THE PROBES IN PARALLEL
E N G L I S H
(no selection)
(fig. F)
°C
-
Fahrenheit Temperature
(default)
SET
(fig. F)
°F
-
FUNCTION AND
39