Setting The Software High Limit; Setting The Set Point Temperature; User-Defined Preset Temperatures - PolyScience 300-048 Manual De Operación

To change from ° F to ° C, place the Circuit Breaker/Power Switch in the OFF position and then press
and hold the P3 Button while turning the power back ON.
NOTE: When the temperature display units are changed, the Software High Limit value and all
temperature presets revert to the factory-default values. If a calibration value has been entered, the
value will be retained.
5.6

Setting the Software High Limit

This feature provides additional safety and protection by allowing a selectable upper temperature
limit set point. To avoid an unwanted shutdown during regular operation, the high limit value should
be set at least 5° C higher than the selected control temperature
To set the Software High Limit temperature set point, press the P2 and P3 keys simultaneously and
repeat until (Hxxx) appears on the display. This is the current Software High Limit value. It is factory
set at 152° C.
To change the displayed value, press and turn the Select/Set Knob until the desired Software High
Limit set point value is displayed. A clockwise rotation increases the value; a counterclockwise
rotation decreases the value. Press the Select/Set Knob a second time to accept the new value and
return to normal operation.
If the Software High Limit value meets or exceeds the control temperature set point, (E-H1) will flash
on the display. If this occurs, enter a higher value for the Software High Limit or reduce the control
temperature set point.
If the actual bath temperature reaches the Software High Limit setpoint, (FLt1) will flash on the
display. Should this occur, the Controller will automatically remove power from the heater and, in
Refrigerating/Heating units, the compressor as well. The pump will continue to operate.
Once the problem is corrected (bath temperature reduced or Software High Limit value increased),
press the Power button to clear the message.
5.7

Setting the Set Point Temperature

Press and release the Select/Set Knob. The decimal point flashes to indicate that the set point
temperature can be changed.
Turn the Select/Set Knob until the desired temperature set point is displayed. A clockwise rotation
increases the setting; a counterclockwise rotation decreases the setting. Press the Select/Set Knob
a second time to accept the displayed value. The decimal point stops flashing and the display will
indicate the actual bath temperature. Allow sufficient time for the bath to stabilize at the desired
temperature before making any adjustments to set point temperature.
NOTE: The unit will automatically accept the displayed set point after approximately 10 seconds of
inactivity, even if the Select/Set Knob was not pressed.
The set point temperature may be checked at any time by pressing the Select/Set Knob.
If the set point temperature cannot be raised, it is possible that the Software High Limit value is set
lower than the desired control temperature set point. Reset the Software High Limit value to 5° C or
more above the desired set point temperature.
5.8

User-Defined Preset Temperatures

With the unit on, press the desired Preset Button — P1, P2, or P3. The
LED associated with the selected Preset Button will begin to flash.
Rotate the Select/Set Knob to the desired temperature set point.
Press the selected Preset Button a second time to enter the new set
point. The new set point temperature will not be saved unless the
Preset Button is pressed.
The LED associated with Preset Button lights continuously whenever
that preset value is controlling bath temperature. If more than one
Preset Button is set at a given temperature set point, the LED
associated with all Preset Buttons with that set point will light.