
19
7.9.2
Set the RANGE switch to the
Diode Test / Continuity Beeper
“
” range.
7.9.3
Connect the test probes to the device or circuit to be tested. To test a
simple diode, connect the red test probe to the Anode of the diode and the
black test lead to the Cathode (“banded” end) of the diode. The LCD will
indicate the voltage drop of the diode. Reverse the connections of the test
probes to the diode. The LCD should indicate overrange (“1 - - -”). If the
Continuity Beeper sounds when the leads are connected in either
direction to a standard silicon diode, the diode is probably shorted.
Note:
The reading displayed on the LCD is an accurate indication of the voltage
drop of the device or circuit being measured.
7.10 Measuring Transistor hFE:
WARNING!!!
Do not apply voltage or current to the meter when it is
set to the ““hFE ” range.
7.10.1
Set RANGE switch of meter to the
hFE
position. Do not insert test leads
into any of the input jacks. Failure to observe this precaution may result
in injury to the user.
7.10.2
Identify transistor type (i.e. NPN or PNP) and pinout of the transistor to be
tested. Insert the leads of the transistor into the meter’s transistor jack at
the appropriate locations.
7.10.3
Read the hFE of the transistor on the LCD display.
Notes:
a)
The hFE test is not intended to determine if a transistor is “good” or “bad”. An
assumption is made that the transistor is good, and the meter measures the
hFE (small signal current gain) of the transistor.
b)
For safety purposes, the contacts of the transistor socket are recessed. The
leads of transistors removed from circuit boards may not be long enough to
make contact in the socket.
c)
It may be necessary to hold the transistor, and apply a slight pressure, in order
to obtain an hFE reading.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.
Downloaded from
Arrow.com.