9
The "Temperature" control is a combination "ON-
OFF" switch and setting selector. The hot plate is
on at any setting of the dial switch at or beyond the
“1” position on the dial. Turn the dial switch
clockwise to set the desired temperature. Dial
marks indicate approximate surface temperature —
the numbers correspond to increments of
approximately 40
°
C (e.g. “5” gives approximately
200
°
C). The cycle light will illuminate at or near the
“1” position on the dial (if this does not occur, see
the “Recalibration” section). When the temperature
for a given dial setting has been reached, the light
will cycle off and on to hold that temperature. If the
cycle light is off, the hot plate may still be hot. To
turn the hot plate off, turn the dial switch to the fully
counterclockwise position.
Operational Precautions
1.
Place the vessel and its contents directly
on the glass-coated top plate prior to
turning the heat control knob to “ON.” The
vessel or an equivalent load should be
placed on the top plate while the unit is
cooling down. Failure to follow these steps
could result in the glass material
separating (fritting) from the metal core of
the top.
2.
Avoid using the unit in highly corrosive
atmospheres. Corrosive fumes and/or
corrosive liquid spills may damage the top
plate and internal components.
3.
Gross weight of items placed on top of the
hot plate should not exceed 15 lbs.
4.
Do not use metal foil, metal containers,
sand baths or other insulating material on
the hot plate.
Operation
Warning
As with all laboratory
equipment, appropriate safety
clothing, glasses, gloves and
coats should be worn when
operating hot plates. Always
use appropriate hand and eye
protection when handling
hazardous chemicals.
Do not use in the presence of
flammable or combustible
chemicals; top surface and
element can reach the “Flash
Point Temperature” of many
chemicals. THESE HOT
PLATES ARE NOT
EXPLOSION PROOF. Fire or
explosion may result. Unit
contains components which
may ignite such materials.
“Caution: Hot Surface. Avoid
Contact.” The top plate will
remain hot without visual
indication for some time after
the unit has been turned off.
Summary of Contents for HP18300
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