The following information applies to the : CAL3K-AP , CAL3K-A , CAL3K-U, CAL3K-F
The cooler 3K-2 can be controlled from the CAL3K or via the USB port at the rear. The Control from the CAL3K works as follows:
- The Cooler parameters are entered in the CAL3K
- When the vessel is inserted in the well these parameters are entered in the Vessel
- When the vessel is inserted in the cooler then these parameters are loaded in to the cooler
- The cooler checks them, and if correct, executes them
The cooler indicates this on its display: COOLING FROM VESSEL
Another way to change the cooling parameters is to connect the cooler to a PC via the USB interface and change the parameters.
The cooler requires that the room (ambient) temperature is about 8 degree LOWER than the Cooler ‘ready’ temperature to obtain a 7 minute cooling cycle. Otherwise the cooling time gets longer. This leads to a situation where the CAL3K is faster than the cooling. Of course, using multiple cooler helps.
The cooler has two operating modes:
Fixed cooling target
The vessel is cooled to the ‘READY TEMPERATURE’ and then the fan stops. This insures a fixed vessel starting temperature.

Variable cooling target
The vessel is cooled to a temperature which is the sum of the Ambient and a constant addition. This insures constant cooling times
CAL3K COOLER PARAMETERS
Ready Temperature | Default=32°C | ||
Ambient addition temperature | Default=8°C | ||
Maximum Ready temperature | Default=40°C | ||
Cooler system definition: | 1 | = | Ambient Addition, Default=OFF |
2 | = | Enable, Default=ON |
COOLER SYSTEM DEFINITION: ENABLE
If set the cooling parameters from the vessel are used
If reset the cooling parameters from the cooler are used
COOLER SYSTEM DEFINITION: AMBIENT ADDITION
If set the cooler target temperature = Ambient + Addition (limit =Maximum Ready Temp)
If reset the cooler target temperature = Ready temperature
SYSTEM CONFIGURATION
The cooling cycle depends on the room temperature: A warmer room temperature results in longer cooling times. The Cooler ‘READY’ time can be adjusted to suit your operating conditions, but an average of 7 minutes per cooling cycle is the design target.
Learn MoreMULTIPLE COOLERS
The cooler is the slowest system component. We have optimised it as best we can; but it is slow! It cools a vessel down by blowing air at it. Not a very efficient way, BUT very resource friendly and economical.
Learn MorePERFORMING A CALIBRATION
The following exercise applies to the following CAL3K Calorimeters in the DDS Calorimeters range : CAL3K-AP (without manual oxygen filling station), CAL3K-A, CAL3K-U and CAL3K-F. For this exercise we used the CAL3K-A Oxygen Bomb Calorimeter System.
Learn More