CHEMOTRONIC III
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will be finished 20 seconds before the specified hold time is turned off. The period
of 20 seconds is taking the response time of the sample temperature into account.
3. Segment (cooling segment without turbidity detection, cd1)
After finishing the hold time the cooling segment starts. In general at the begin of
this segment a strong cavitation of bubbles caused by a fast stirring at a high
temperature of the substances can be observed. During the bubble cavitation the
determination of cloud point is not possible because the bubbles produce an
alternating absorption effect of the infrared beam. For this reason the stirring
speed will be reduced to a lower level (speed N2). This value can be corrected by
the user. In addition the turbidity detection is locked. The segment 3 is finished at
the temperature T2. The temperature T2 is equal T1 reduced by the adjustable
delta temperature.
4. Segment (cooling segment with turbidity detection, cd2)
Within the segment 4 the cooling procedure is continued and the turbidity detection
will be enabled. By using the turbidity setpoint a turbidity comparison will be carried
out permanently. The device uses speed N2.
5. Segment (cooling segment with turbidity detection, cd3)
The speed N3 will be set at the temperature T3. Its is possible to use a higher
rotation speed than speed N2 because the bubble cavitation should be finished
now. After turbidity detection the measurement will be stopped and the cloud point
temperature is printed out at the line printer.
Summary of Contents for HEMOTRONIC III
Page 54: ...CHEMOTRONIC III 54 Appendix...
