RH
basic
Heating
The heating function is started, controlled and stopped with
the left control knob:
•
Place the magnetic bar in the vessel, and then place the
vessel in middle of the hotplate.
•
Turn the left control clockwise, the amber Temp indicator
light comes on.
•
Temperature control: By turning the control clockwise, the
temperature of the hotplate surface can be adjusted from 50
to 450 °C.
•
To stop the Heating function, turn the Heater Control Knob
counterclockwise.
REMARKS
Heating
power:
The heating power
- 500
Watts
- is
concentrated
in the
center
of the
hotplate. This avoids heat loss and accelerates the rise
in
temperature
in
the
beaker.
Hotplate:
The glass-ceramic surface
is
resistant against most media,
but it can
be chipped
or
cracked
if
subjected to
impacts.
The ceramic plate
is
sur-
rounded
by an
aluminum frame
to
protect
it
from side impacts.
If the
Hot plate surface becomes damaged
in any
way, discontinue
use
immediately,
and
consult the factory
for
repair
or
replacement.
Temperature
in the
beaker:
Unless special reasons warrant, stirring should
be
used together with
heating. This improves
the
heat distribution
in the
media
and
avoids
retardation
of
boiling.
For accurate automated temperature control
we
recommend the
use of
the ETS-D4 Electronic Contact Thermometer.
You can
set
the desired temperature digitally and read the actual tem-
perature
at any
time.
At
the rear
of
the instrument
is a
DIN connector
for the ETS-D4. Switch
off
the heating function
and
remove
the
gray
Contact Plug from
the DIN
connector before plugging
in the
ETS-D4.
When using
the
ETS-D4, change between
A, B or C
mode,
by
first
turning the heater control-knob off, which will also turn the ETS-D4 off.
With
the
ETS-D4 off, press
and
hold down
the
"+"
key on the
ETS-D4
while turning the heater control knob fully on, then release
the
"+" key
on
the
ETS-D4 once
you see the
display
appear.
Refer
to
your ETS-
D4 manual
for
operating instructions.
Note:
When working without
a
contact thermometer,
the
gray Contact
Plug provided must
be
installed
in the DIN
connector,
as the
heating function will
not
operate without
it.
When working with
a
contact thermometer
the
heater switches
off
automatically
if
the plug
of
the contact thermometer
is
unplugged unin-
tentionally. This
is an
additional safety feature.
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