Barnstead SUPER-NUOVA HP133420-33 Operation Manual And Parts List page 15

Note
The top plate temperature will not
exceed the 300°C maximum.
Controlling Solution Temperature
Using External Probe
To control the solution temperature plug the included probe or
an ungrounded Type K thermocouple probe into the probe
receptacle located on the right side of the unit. Be careful to
observe the correct polarity of the probe connector when
inserting probe. Place the probe into the solution. The display
will indicate the actual temperature of the solution as meas-
ured by the probe, and the probe indicator LED on the front
panel will be illuminated. Keep in mind, drafts and other tem-
perature fluctuations will affect temperature accuracy.
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.
When using a probe with the SUPER-NUOVA plate it is rec-
ommended that a clamp on a support rod be used to hold the
probe in the solution.
To ensure accurate probe readings, as much of the probe
sheath as possible should be immersed in the solution. Make
sure the probe is immersed in the liquid and is not located in
air or outside of the solution in the center of the stirring vortex.
If the probe is plugged into the plate, but is not in solution
while the heat control is operating, the temperature display
will continue to indicate an ambient temperature, and a probe
out of solution error will occur. Because the set point cannot
be reached the element will continue to supply heat to the top
plate, and the maximum top plate temperature of 300°C may
be reached. If the remote probe does not sense a tempera-
ture change in three minutes the unit will display a heating
error and shut down. If more than three minutes is required,
see "Service and Calibration/Probe Response."
O
PERATION
15