The Huber K6 is capable of both heating and cooling. The unit is composed of two halves, a lower cooling bath and an upper heating element with a recirculation pump and controller.
There is a data cable that connects the two halves, enabling the controller to control both halves. Ensure this data cable is snugly secured.
Finally, there is a three-position switch on the lower unit that must be in the “II” position (the upper position) in order for the bottom unit to be controlled by the controller.
In the event the system is open to the atmosphere while either the cold trap is cold or a temporary leak occurred, water vapor from the air around the machine can condense on the cold trap, forming ice. When a vacuum is applied, this ice will slowly sublimate (or turn into vapor) causing the vacuum to not go below the mid-to-low negative 1’s (between 1 mbar and 0.1 mbar).
This can easily be fixed by simply leaving the vacuum pump on with the gas ballast open. In addition, you can accelerate this process by changing the temperature of the setpoint of the cold trap chiller to 0 degrees C, and then changing the temperature back down to the minimum setting once it reaches 0 degrees.
The elevated temperature will supply the thermal energy necessary for the sublimation of the water and will reduce the time for the ice to disappear.
More information can be found in SOP – Vacuum Troubleshooting.
If you need additional assistance, please call technical support at +1 (206) 452-1130.
If the feed tank seizes (or stops) while the feed tank is full of oil, sometimes this can be remedied by:
- setting the feed temperature to 130 degrees C for 30 minutes
- then re-engage the pump
If you have followed the above steps and this does not fix your problem, you may then try the following steps:
- remove the perforated shroud covering the gear (coupling the motor to the gear pump)
- rotate the gear by hand
- and then reengage the pump
If your problem still persists, then try the following:
- turn the feed system off
- wait for the product to cool completely
- then follow SOP-Gear Pump Clean
More information can be found in SOP – Gear Pump Clean.
If you need additional assistance, please call technical support at +1 (206) 452-1130.
