TM 11-6625-539-14-4
7-23. Ico lR Measurement Tests
b. Test Connecting and Conditions. Connect the
ZM-16/U in series with the ME-221/U across C, D
a. Test Equipment and Materials.
and B, G remote jacks on test set.
(1) Resistor, Decade ZM-16/U.
c. Procedure.
(2) Ammeter ME-221/U.
Control settings
Step
Test procedures
Performance standard
No.
Equipment
Test
equipment
under test
1
Adjust ME-221/U to
FUNCTION switch:
Adjust ME221/U until meter
Test set meter and ME-221/U
read
required
ICO, IR.
indicates 20 on ICES , ICO , IR
readings must coincide with-
range.
in 3 percent of full-scale de-
R A N G E switch: X
scale. Compare this reading
0.1.
with indication on the ME
flection for selected range.
221/U.
2
Same.
Same.
Repeat step 1, except adjust
Test set meter and ME-221/U
ZM16/U first to indicate 50,
readings must coinside within
then 100 on ICES , ICO , IR scale.
3 percent of full-scale deflec-
Compare each reading with
tion for selected range.
indication on ME221/U.
3
Same
R A N G E switch: X
Repeat step 2, except adjust
Test set meter and ME-221/U
1.0.
ZM16/U to indicate 100 on
readings
must
coincide
ICES , ICO , IR scale.
Compare
within 3 percent of full-
scale deflection for selected
reading to indication on ME
221/U.
range.
4
Same.
R A N G E switch: X
Repeat step 2, except adjust
Test set meter and ME221/U
10.
ZM16/U to indicate 100 on
readings must coincide to
I C E S, IC O, IR scale. Compare
within 3 percent of full-
reading to indication on ME
scale deflection for selected
221/U.
range.
724. Diode Measurement Tests (in-Circuit)
(2) One 20-ohm l-percent.
b. Test Connections and Conditions. As indi-
a. Test Equipment and Materials.
cated below.
(1) Four diodes of varying values, including
c. Procedure.
silicon and germanium types.
Control settings
Step
Performance standard
Test Procedures
No.
Test
Equipment
Equipment
under test
I
N/A
Meter must deflect above
Connect one diode in parallel
FUNCTION switch:
"BAD" position.
DIODE lN/CKT.
with 20-ohm resistor across
R A N G E switch: to
C, D, and E, S remote test
setting appropri-
jacks. Check deflection of me-
ter on DIODE IN/CKT scale.
ate for device.
POLARITY switch:
to setting appro-
priate for device.
Meter must deflect above
N/A
Same.
Repeat step 1 using three re-
"BAD" position.
maining diodes in turn.
7-15
