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h
t
-l
:l
-t
.-l
:l
I
it
as a daily
routine,
because current drift
is very low and stable.
The following
is a step by step procerlure for cireching arnpli-
fier
balance.
(1)
?lace the voltmeter
RANC,E switch in the (plus or ninus)
O.l- position
and depress the DIS button of the Pre-?atch ?anel
control
sr,riteh.
In this
state the computer is ready for voltage
balance check (sC mode).
(2)
Using the selector
system, select each anplifier
A00
through A39.
The voltneter
shoul-d r.egister
a zero deflection
for any other.
Tr,lo positions
':,f +0.1 and -0.1 of the voltneter
range sr^ritch will
detect null
error
in the voltmeter.
e)
Should an anplifier
cause a deflection
to either
side of the
center zero on the voltneter,
adjust
the correspond,ing balance
control.
The balance eontrol
for arnplifiers
A00 through A39
(the operati-onal araplifiers)
ar"e located
directly
behind the ?re-
?atch ?anel (Figure Z.Z-4).
There are two balance controls
in an
ar,rplifier.
They are voltage balance control
and, current
balanee
control.
In the BC mode (when DIS button pushecl), only the
voltage balance is necessary.
Adjust these controls
for a zero
reading on the neter.
The current
balance should be done for
integrator
connection amplifiers
i-n H0LD mode.
r
^L4^^*-^ n^hlutational
components
u .
v Ir@r5!r5
v vlrr}J u u@ urvrre!
v vruyvrrE
:
In the solution
of some problems it
may be necessary to add a speei-
fic
type of comErtational
component to the existing
complement.
Sinee
narry of the rnodule posit'ions
are desig:ed to handle mora than one type
of computing component, a component not r"equired in tlre problern invest'iga-
tion rnay be removed and another unit
plaeed in that cradle.
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