JULABO CF40 Cryo-Compact Circulators - Manual (Page 22)

Operating procedures
22
6.3. Switching on / Start - Stop
Switching on:
 The Cryo-Compact Circulator is turned on and off with the mains
switch.

The unit performs a self-test. All segments of the 4-digit LED
temperature DISPLAY and all indicator lights will illuminate
(as illustrated on the left).
Then the software version and the type of unit is indicated.
Examples: (v 1.02) (CF30)
The display "OFF" indicates the unit is ready to operate (standby
mode).
Start: Press enter for about 4 seconds.
The LED temperature DISPLAY indicates the actual bath
temperature.
Stop: Press enter for about 4 seconds.
Turn the unit off with the mains power switch.
6.4.  Control of the cooling machine
With the mains switch turned on, the circulator automatically switches
the cooling machine off and on.
To ensure protection of the compressor, the software only switches
the compressor on after a delay of 200 seconds.
It is switched off, if:
- at internal control >Int<
the setpoint temperature is increased and the heat-up time
calculated by the controller is longer than the intended time of
compressor standstill (200 s).
- at external control >EXT<
the actual working temperature is increased by >5 °C
It is switched on, if:
- cooling is necessary for maintaining the bath temperature.
(possibly after the 200 s time delay).