SUB Universal, SBB boiling, JB and PB unstirred water baths
Part No. 15133/Issue 14 Page 8 January 2010
3.2 SBB baths
3.2.1 Controls and indicator lamps
The set heater power knob controls the power of the heater through an energy regulator. It is
not a thermostat.
For heat up, turn the set heater power knob to maximum. Once the water is boiling, turn the
knob to the minimum position which will maintain boiling.
The heater lamp (orange) indicates when the heater is on.
3.2.2 Over temperature protection
Two fixed over temperature cut-outs prevent the heater reaching a high temperature in the
case of low liquid level.
The reset buttons for the cut-outs are on the rear panel.
3.3 JB baths
3.3.1 Controls and indicator lamps
The set temperature knob sets the required operating temperature.
The heater lamp (orange) indicates when the heater is on.
3.3.2 Over temperature protection
The JB1 unit is protected against over temperature by an internal thermal fuse and the other
JB units by a fixed over temperature cut-out.
If the heater lamp does not come on when expected and the temperature of the bath does not
rise, see fault diagnosis (section 5).
3.4 PB 1
3.4.1 Controls and indicators
The temperature knob C sets the required operating temperature.
The heater lamp indicates when the heater is on.
The overtemperature lamp indicates when the protection has activated
3.4.2 Over temperature protection
The PB1 unit is protected against over temperature by a fixed over temperature cut-out. The
overtemperature lamp will come on if it is activated. In addition the heater lamp does not come
on when expected and the temperature of the bath does not rise, see fault diagnosis (section
5).
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