Cole Parmer Polystat I Installation, Operation, Basic Maintenance page 6

Indicates refrigeration system status.
Pressure Gauge
Indicates the
controller is displaying
the setpoint. Press the
arrow keys to change
the value.
5
Press . The controller will do a self-test (the controller will quickly sequence through its LEDs and
momentarily sound the alarm) and then display the recirculating fluid temperature. The refrigeration system and
the recirculation pump will then start. The RECIRCULATING PRESSURE gauge will display the pump operating
pressure. If the pressure needs adjusting, refer to Section 3 in the manual.
NOTE If on start up the unit's recirculating fluid is outside either temperature limit, the unit will operate but the
appropriate indicator will flash until the fluid is within the limit.
To display/change the setpoint use the arrow keys,
NOTE If the arrow keys are not pressed within 10 seconds the display will return to the current reservoir
temperature. The controller will not allow you to enter a setpoint closer than 2°C of either temperature alarm
setting. Trying to use a setpoint within 2°C causes the appropriate indicator to flash and sounds the audible alarm
twice.

Once the desired setpoint is displayed, press
for a short period and then return to the recirculating fluid temperature.
Indicates the controller is
displaying the unit's low
temperature alarm setting.
to confirm the change. The display will rapidly flash the new value
Use this key to
Indicates the controller is
toggle the unit on
displaying the high temperature
or off.
alarm setting.

will illuminate.
Press to change the
displayed value.
Optional. Indicates the unit
is operating in the serial
communication mode.
Press to sequence through the
four indicators and accept the
displayed value.
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