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3330B
t1
^2
*4
^6
stand by
Operate
Operate
Flag
Output
Relay
Inst.
Within
Spec.
"
0
ms
Operate
Line
in
Logic
"0'
t2
"
10
ms
Operate
Line
in
Logic
"T
tg
26
ms
Operate
Flag present
t4
"
40 ms
Output
Relay
energized.
^^5
=
1
sec
Inst, in
Spec.
Figure
2-8.
TYPICAL RESET
ON
10V
RANGE
3330B. Pay
particular
attention
also to the special operat-
ing
considerations outlined
in
paragraph
2-53.
2-53.
Special
Operating Conditions
2-54.
RESETTING.
The
operate
line
must be
held
in
a
Logic
"0"
state
for a
minimum
of 10
ms
before Logic
"1"
may
be
applied.
Actual
resetting
is
accomplished
as
soon
as
the
operate
line
is
returned to Logic "0".
When
a
Logic
"
1
"
is
applied,
the
output
becomes
energized.
NOTE
Resetting
is
not
possible
for a period
of
five
seconds
if
the
instrument
is
in
a voltage
trip
condition
due
to
excessive application
of
the
automatic crowbar. Refer
to
paragraphs 3-70
and
3-74.
2-55.
CURRENT
MODE.
When
switching
from low
to
high
compliance
voltages,
programming
speeds
must
be
slower.
This
applies
when
using
compliance
voltages
in
excess
of
200
volts;
programming
rates
should not exceed
the times
shown
in
F^ure
1-1,
Section
1.
2-56.
VOLTAGE
MODE.
Range
or
programming
changes
within the
1
kv
range
must
be
made
at
rates
within the times
shown
in
Figure
1-1;
this
applies
when
output
voltages
are
greater
than
200
volts.
2-57.
CURRENT
LIMIT/VOLTAGE
TRIP FLAGS.
The
current
and
voltage
flags will
not be enabled
and
conse-
quently cannot be
present
at
the
programming
connector
until
approximately
40
ras after
the
instrument
is
in
the
operate
mode.
Also, there
will
be an absence of both
flags
for
approximately
1
00
ms
during
either a
mode
or
polarity
cMnge, due
to the
instrument being placed
in
standby
dur-
ing this
time.
2-58.
OPERATE
FLAG.
A
contact closure
to
program
common
will
be present
approximately
15
ms
after
the
instrument
is
commanded
to
the
operate
mode. The
output
relay
does not
energize
for
another
15
ms;
see
Figure
2-8.
During
a
polarity or
mode
change, the
output
relay
will
open
for
100
ms
and
then
close.
2-59.
VOLTAGE
TRIP
RANGE. When
programming
the
Output
Voltage
and
Voltage Trip range
from some
high
level
to a
low
level,
it
must be
remembered
that the
Voltage
Trip
Range
time
is
much
less
than
the
Output
Voltage
settling
time.
If
both
are
programmed down
simultaneously, the
instmment
will trip
into the
Voltage
Trip
mode.
Allow
sufficient
time
after
programming
the
output
from
a
high
level
to
a
low
level
before program-
ming
the
Voltage
Trip
Range from
a
high
level
to a
low
level.
In
a
worst-case application,
with
the instrument
operating
on
the
1000
volt
range,
if
ail
the decades
are
"
0
"
"
1
"
if-
1000V
Range
Removed,
10V Range
Called.
100V
Range
&
100V
Trip
Range
Called.
100V
Range
in.
<>
200
ms
201
ms
L
202
ms
r
|4
210
ms
1
k
V
Trip
Range
Removed.
100V
Trip
Range
in.
I
I
M
I
I
W
Figure
2-9.
1
KV
to
100V TRIP
TIMING
2-12
11/72
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