Setting The Temperature; Controlling Solution Temperature Using External Probe - Fisherbrand HP88854200 Manual Del Usuario

Note
The solution temperature is approximately
25% cooler than the hot plate surface
temperature.
Note
If you allow the top plate to reach the
maximum temperature of 540°C while
preheating and then turn the control down to
a setpoint less than 200°C, the temperature
of the top will drop rapidly to 200°C.
Because of the natural cooling characteristics
of ceramic, the temperature of the top will
drop much more gradually after the top plate
temperature reaches 200°C.
Note
Boiling times are dependent on solution
volume and the surface area of the flask that
is exposed to the hot plate. For example,
when heating the same amount of solution in
a 2L flask vs. a 1L flask, the solution will heat
about 20% faster.

Setting the Temperature

Your Isotemp stirring hot plate has an electronic closed-
loop feedback control which will accurately maintain
temperature setpoints in 1° increments from 30°C through
300°C, 400°C or 540°C, depending on the model. An
unloaded hot plate will heat to maximum temperature in
just 8 minutes. The temperature is controlled at the top
plate by the internal sensor. A "CAUTION - HOT TOP"
light on the front panel will illuminate whenever the top
surface temperature exceeds 50°C.
Your Isotemp stirring hot plate will display the tempera-
ture in °C. When choosing a setpoint, the display will
indicate the setpoint for 2 seconds, after which the dis-
play will flash until the desired setpoint is reached.
When pluging in the remote probe , turn the temperature
knob to "OFF", then adjust new temperature setpoint
Value. The probe light will illuminate when the remote
probe is plugged in."CAUTION - HOT TOP" light will flash
until the top surface has cooled to below 50°C.
Controlling Solution
Temperature Using External
Probe
To control the solution temperature plug a external probe
into the probe receptacle located on the back side of
the unit. When the probe is connected, the adjustable
temperature range is 30-250°C. Place the probe into the
solution. The display will indicate the actual temperature of
the solution as measured by the probe. When the probe
is connected, the adjustable temperature range is 30-
250°C.
The external probe offers more exact temperature control
than regulating the top plate by the internal sensor. If you
need to maintain a precise setpoint it is recommend to
use a probe to control the solution temperature instead of
controlling by the top plate temperature.
O
PERATION
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