NESLAB HX Digital Serie Kurzbedienungsanleitung Seite 27

Temperature Adjustment
To display the temperature setpoint, press and hold the DISPLAY button. To
adjust the temperature setpoint, press and hold the DISPLAY button and turn
the ADJUST dial until the desired temperature setpoint is indicated on the
TEMPERATURE °C LED display. Once the setpoint is adjusted, release the
DISPLAY button. The TEMPERATURE °C display will indicate the tempera-
ture of the fluid in the reservoir.
NOTE: Inadvertent movement of the ADJUST dial will result in a change in
the setpoint. The change will not be immediately reflected on the
TEMPERATURE °C display unless the DISPLAY button is pressed. The
display will eventually change as the unit responds to the new setpoint.
Fault Response
Controllers with a START switch are configured to shut off in the event that a
fault occurs. Controllers NOT equipped with a START switch will allow the
unit to continue to operate if a fault occurs. This option is available for
customers who are willing to accept the risk of damage to the unit in order to
continue to provide cooling fluid to the instrument being cooled.
With either controller configuration, the relay contacts connected to the
controller receptacle will open and the FAULT indicator will light if a fault
occurs. The cause of the fault must be identified and corrected before the unit
can be restarted.
START Switch
If the controller is equipped with a START switch, a fault will cause the unit
to shut down. Press the START switch to restart the unit after the fault has
been corrected. If the fault has not been corrected, the unit will not start and
the FAULT indicator will light when the START switch is pressed.
Temperature Monitors
The optional high and low temperature monitors are connected to sensors
that monitor the temperature of the cooling fluid as it exits the reservoir. The
monitors protect the system from exposure to excessively hot or cold cooling
fluid. A temperature fault occurs when the fluid temperature exceeds the set
temperature limit.
To adjust either temperature monitor, turn the appropriate calibrated dial to
the desired temperature limit.
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