TM 11-6625-539-14-4
Control settings
Step
Performance standard
Test procedures
Equipment
Test
No.
equipment
under test
3
Meter must indicate transcon-
Connect 4k-ohm resistor across
N/A
Same.
d u c t a n c e . Value must be
D-S terminals of transistor
within 10 percent of full-
under test.
scale range of value indicated
in step 1.
I n s e r t second and third field Transconductance value with
Same.
4
N/A
effect transistor in test jack
resistive load must not vary
by more than 10 percent of
on front panel and determine
full-scale range of unloaded
effect of added resistance per
indication.
steps 2 and 3.
7-22. ICES and IR Measurement Tests
(2) One 500-ohm, 1-percent resistor.
a. Test Equipment and Materials.
b. Test Connections and Conditions. As indi-
cated below.
(1) One good NPN or PNP transistor, the ICES
of which has been checked on a standard transis-
c. Procedure.
tor test set.
Control settings
Step
Performance standard
Test procedures
Test
No.
Equipment
under test
equipment
N/A
1
Meter indicates zero on scale.
Operate METER ZERO to ad-
FUNCTION switch:
I CES I R .
just meter zero.
POLARITY switch:
N P N or PNP to
correspond with
s e l e c t e d transis-
tor.
R A N G E switch: X
10.
2
N/A
FUNCTION switch:
Zero meter using ICES C O A R S E
Meter indicates zero on scale.
I CES
and FINE controls.
3
N/A
Zero meter using METER
I CES switch:
press
Meter indicates zero on scale.
ZERO control.
and hold in READ
position.
4
N/A
ICES switch: as indi-
Repeat steps 2 and 3.
Meter indicates zero in both
cated
ZERO and READ positions of
ICES. switch.
5
N/A
R A N G E switch: to
Insert transistor in test jack on
Meter indicates zero with ICES
setting appropri-
front panel. Connect 500-ohm
switch in ZERO position.
ate for device.
resistor across CE termi-
nals. Use ICES COARSE and
FINE controls to zero meter
6
N/A
I C E S. switch: press
Check indication on ICES , ICO , IH
Meter indication is within 10
percent of ICES value deter-
and hold in READ
scale of meter.
position.
mined by standard test set.
M e t e r indication is within
Repeat tests using two other
N/A
7
transistors which require use
of I CES value de-
10percent
termined by standard test
of two remaining ranges.
set.
7-14
