Du Pont SORVALL RC-5 Service Manual page 23

DescriptionSon/all®
CentrifugesTable
2-2. Function of Controls and Indicators
-
RC-5BNamePositionFunctionSTART
switch
andlamp
(7)BRAKE
switch
andlamp
(8)POWER
lamp
(9)DOOR
switch
andzero
speed lamp
(10)Press
on(momentarycontact)Press
on
and
off(alternate
action)Press
on(momentarycontact)BRUSHES
lamp
(11)POWER
switch
(12)Release
Rod
(13)Press
top
halfof
POWER
forpower
ONPress
to
releasedoor
latchshown
in
figure
3-15. When
theSLOW
lamp is extinguished,
thecentrifuge
runs as a
nonautoma-tic
rate controlled unit with
theusual
rapid acceleration
and
de¬celeration.
Serves as a
dummywhen
Automatic Rate
Controloption
is not
installed.Switch
starts centrifuge in
se¬lected
mode. Lamp
illuminatesin
either RUN
or
HOLD
mode.Selects
brake circuit which
oper¬ates
when
centrifuge enters
stopcondition.
Lamp
illuminateswhen
brake circuit is
selected.Illuminates
when
POWER
switchis
on.Switch
permits door
openingduring
normal
or
slow
modewhen
rotor speed
is below
ap¬proximately
100
rpm.
Lampilluminates
when rotor speed
isbelow
approximately
100
rpm,indicating
that door
may
beopened.
The
lamp stays
illumi¬nated
whenever door is
open.Flashes
to indicate worn
motorbrushes.Applies
main
power
to
all
cir¬cuits
and automatically
selectsstop
condition.Manually
releases safety
inter¬lock
to allow
emergency
dooropening
at
any speed.
It
may
benecessary
to
lift
door
handlewhile
release rod is
held
in
toovercome
slight
vacuum
in
thechamber
due to rotor
motionat
high
speeds.