April 8, 2011 HN FAQ Memo, Version 3.0 Page 9 of 108
2.1.16 Quarantine
Description: The quarantine indicates that there is a problem with the dosage system in the Herd
Navigator.
If there is a problem with the dosage system it is likely that the dosage volume will be to little or no dosage
at all. This situation will affect the measurements of all four constituents, leading to false reactions in the
bio-models, and leading to false alarms. The LDH sticks is sensitive to the dosage volume and no or little
dosage will show up as very low LDH, and out off range results. To avoid false input to the bio-models ,the
level of the measurements on the LDH sticks is continuously monitored. If the general level of LDH
(measured over a number of samples) drops, the Quarantine function gets active. The quarantine function
will then make sure that all these results are quarantined and not used in the Bio-models. Furthermore the
quarantine function will stop measuring on BHB, Urea and progesterone sticks. The monitoring of the LDH
measurements will continue, and the quarantine function will detect if the results will revert to normal
levels again. After a given number of good LDH results the quarantine will be cancelled and the
measurement on all constituents will continue.
Most often the quarantine requires a visit by the service technician to clean the complete dosage system.
Causes / Actions: Leaks in dosage system, or tubes clogged.
Inspect all tubes and clean the complete milk line from SI to AI.
Note that a given number of “good” samples are required after a quarantine, before the quarantine is
cancelled.
Reference: 2.2.1 Procedure for complete cleaning of milk transport system between SI and AI.
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