John Fluke 3330B Manual page 21

3330B
programmed
to zero, allow 3 seconds before programming
the
Voltage Trip
Range
to a
lower
range.
2-60.
To
program
the
Voltage Trip Range from
the
lOOOV
range to
the
lOOV
range,
first
down-range the
instruments' output
to the
lOV
range.
Then, 200
ms
after the
instrument has been down-ranged, program
the
lOOV
range
and
the
lOOV
Voltage Trip
Range
simul-
taneously.
Refer
to Figure 2-9.
2-61. Operating
Examples
2-62.
The
use
of an output crowbar
when
using the
current
mode
is
normal procedure,
since the
crowbar
is
used
when
changing loads
in the current
mode. As
pointed
out
in
Figure 2-7, 15
ms
is
required before the
crowbar
actuates. Therefore, 15
ms
of time
is
required before
re-
moving
or
changing
loads. If this
procedure
is
not
fol-
lowed,
the instrument
will
slew
up
to the
voltage trip
point.
11/72
2-13/2-14