28
Setting the Temperature
The Isotemp Advanced heating unit has an electronic
closed-loop feedback control which will accurately
maintain temperature setpoints from 30°C through
300°C, 400°C or 450°C(depending on the model). An
unloaded hot plate will heat to maximum temperature in
just 5 minutes. A "CAUTION HOT TOP" light on the front
panel will illuminate whenever the top surface temperature
exceeds 50°C. The temperature may be controlled either
at the top plate by the internal Type K thermocouple
sensor, or in the solution using an accessory ungrounded
PT100 probe. If a probe is used, the display will indicate
"R" after actual temperature. The Isotemp Advanced
heating units will accept any ungrounded PT100(PT1000)
probe, however the accuracy of probes other than those
tested and specified may not reach the probe accuracy
rating designated.
To set the temperature, press "TEMP" key located under
display. Then the temp setpoint will flash. Use the knob on
the front panel to select a temp. Turn the knob clockwise
to increase the temp or counterclockwise to decrease the
temp. When desired setpoint has been reached, press the
"TEMP" key or wait 10 seconds, the temp setpoint will no
longer flash indicating that it has been set, then push the
knob to start heating.
Note
Boiling times are dependent on solu-tion
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.
Note
The top plate temperature will be higher than
your solution temperature.
O
PERATION
Содержание Fisher Scientific HP88857290
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