Pre-Selection Of Temperature; Pre-Cooling - Hermle Z 326 K Operating Manual

OPERATION

2.3.4 Pre-selection of temperature

This funktion is activated by the key „temp" (13). After pressing that key in the display „temp" flashes
the indication „°C" (A-4). By the adjusting knob (1) the desired test temperature can be pre-selected in
steps of 1°C in a range from -20°C up to +40°C.
The value is indicated permanetly in the display (figure 21) - before, during and after rhe run.
Please notice the respective lowest temperatures of the rotors at maximum speed!
Figure 21

2.3.5 Pre-cooling

If the samples are temperature-sensitive it is useful to pre-cool the centrifuge, the rotor and eventually
the buckets to the needed working temperature. Therefore insert the desired rotor and pre-set the
respective temperature. By simultaneous pressing of the keys "temp" (13) and "time" (6) you start the
run. While running the unit chooses automatically a rotational speed that is equivalent to 20 % of the
permitted rotational speed of the respective rotor. After the pre-set temperature is reached you can
leave the pre-cooling run with the "stop" key (10).
Depending on the inserted rotor the pre-cooling goes between approx. 10 and 20 min.
All with number marked passages refer to figure 22
Figure 22
22
Z326K_V3.15 © Hermle Labortechnik GmbH