HL, SL
29
•
Avoid sharp bends in the tubing, and maintain a sufficient distance from
surrounding walls.
•
Regularly check the tubing for material defects (e.g. for cracks).
•
Preventive maintenance: Replace the tubing from time to time.
5.4. Filling / draining
Notice:
•
Pay attention to the thermal expansion of bath oil during heating to avoid
overflowing of the liquid.
•
Do not drain the bath fluid while it is hot!
Recommendation: Temperature range 5 °C to 40 °C
Check the temperature of the bath fluid prior to draining (by switching the unit on
for a short moment, for example).
•
Store and dispose the used bath fluid according to the laws for environmental
protection.
Filling
Take care that no liquid enters the interior of the circulator.
•
Recommended maximum filling level with water as bath fluid: 30 mm
below the tank rim
•
Recommended maximum filling level with bath oils:
40 mm below the tank rim
After filling, immerse the samples in the bath or place the lid on the
bath, in case the opening is not to be used.
The circulator provides an early warning system for low level
(description – please refer to page 36) that may be triggered when
changing samples in the bath.
Draining:
•
Turn off the unit and disconnect the mains cable from
the power source.
•
Hold the venting grid, pull out and remove.
•
Slide a short piece of tube onto the drain connection
and hold it into a container.
•
Loosen the drain screw a few turns and drain the unit
completely.
•
Tighten the drain tap.
