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The procedure for inserti-ng and removing the pre-patch panel
is described in Paragraph 2.b.
(2)
Patch the Digital
vortmeter
(nvru) and multi-range
voltmeter
(wt) to the selector
readout system.
(see Figure 2.J-2 and ?ara-
graph 2.c. of this
section for a deseription of the selector system
n n o n r * . i
a -
\
e)
Apply power to the computer, then ?ot Set mode will
appear.
rnitially
the overload lamps of the operational
arnplifiers
r,rill_
light;
after
a few seconds all
of the lamps should extinzuish.
(/r)
check the vari-ous suppry voltages
of the computer.
All
power
supply outputs are eonnected to the voltmeter
switch in front
of
the power supply through appropriate
scaling resistors;
the check
may be accomplished simply and rapidly.
(5)
Check the plus and minus referenee
DVM by selecting
100 (red for plus) and
Paragraph 3.a.
(6)
Allow about thirby
minutes lrafln-up time; this
assures that the
computing components, (including
the DVI'{ and oscilloscope)
are up
to normal- operating
temperature.
Ground the DW input ter:nination
(designated on the oc-151 FEADOIIT ?AliET,), md confinn the reading is
within
000.00 plus or minus one bit.
other adjustment for DVM will
be necessary according to Model of DVM, for DV-251, the zero check
is the only step necessary to assure thl
correct
operation.
(7)
rn the Por SEf mode of the cornputer (pon sET button on the con-
trol
pane1, model CT-25I depressed), closed relay contacts prov:ide a
feedback cj-rcuit
for the operational
amplifier.
(see paragraph { of
this
section for a more detailed
description)
supplied for readout on the
1OO (blue for rninus).
See
- 1 1 -
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