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Table
5.
Equipment Performance Checklist (Cont'd)
STEP
ITEM
ACTION OR CONDITION
PERFORMANCE STANDARD
7.
Detector gain check
g.
Set CONDUCTANCE
g. None.
(Cont'd)
control to zero on
G-scale and rotate
GAIN control fully
clockwise.
8.
Internal bias voltage
a.
Check that all front
a. None,
check.
panel controls are in
accordance with Table 4.
b.
Remove terminal shield
b. None,
from TEST binding posts.
c.
Set the DC BIAS switch
c. None,
to +INT.
d.
Adjust multimeter to
d„ None,
measure at least +150
volts.
e.
Connect multimeter
e. Multimeter indicates
positive prod to TEST HI
zero on the dc scale,
binding post and negative
prod to TEST LO binding
post.
f.
Rotate DC BIAS INTERNAL f„ Multimeter pointer
ADJUST control fully
deflects smoothly from
clockwise.
zero to +140 ± 10 volts
on dc scale.
g„
Rotate DC BIAS INTERNAL g. Multimeter pointer
ADJUST control fully
deflects smoothly back
counterclockwise.
to zero on dc scale.
h.
Adjust multimeter to
h. None,
measure at least -10
volts.
i.
Set DC BIAS switch to
i. Multimeter indicates
-INT.
zero on dc scale.
75D
b-370
57
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