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Grounding Strap
Testing the Safety
Features
Thermo Scientific
Sahara baths, and stand-alone circulators, require immersion circulator
grounding.
and Nut
If the circulator is removed for any reason you must ensure the nut
and washer secures to the grounding strap located on the rear of the
reservoir top when the circulator is reinstalled.
Check the safety features for high temperature protection and low liquid
level protection at regular intervals. The frequency depends on the
circulator's designated application and the heat transfer fluid used.
High temperature protection
Using a small diameter (less than 1/8") plastic/metal rod, turn the arrow
to the desired temperature.
Note
prevent possibly melting the plastic.
Set a cut-off temperature that is lower than the desired setpoint
temperature.
Switch on the circulator and ensure the circulator shuts down at the set
cut-off temperature.
If the circulator does not shut down have it checked by a qualified
technician.
Reset the safety to the desired temperature.
Low liquid level protection
With the circulator on, use a screwdriver and slowly push down on each
level sensor, one at a time, until an error message appears. See Section 6
for details on error messages.
If not, have the circulator checked by a qualified technic
If using plastic rod ensure the fluid temperature is low enough to
Section 5 Preventive Maintenance
5-65
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