Start of operation
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Measuring System MAK TIGER 3003 Service manual, SA 131128, 10.03.2020
Guaranteeing the representativeness of the samples
All of the above points must be observed in order to guarantee that the sam-
ples are representative. It may be the case, however, that the fat level in the
automatic sample does not tally straight away with the fat value of the man-
ual sample.
One reason for this may be that the flow and the level cannot be measured
correctly because the milk is swirling vigorously at the place where the flow
level meter sits (e.g. if a bend has been installed recently).
Possible remedies in this case:
- either a mechanical change in the pipeline (ideal solution!)
or
- correction factors settings of low, medium and high
The controller then takes less account of the overrun of the milk. As a result,
it is assumed at the end of the intake process (i.e. when a lot of air is present)
that the overrun is greater, i.e. less milk is flowing past and less is being
channelled off. The milk drawn in at the end of the intake process is mainly
the milk with the fat content therefore the sample which is taken will auto-
matically be lower in fat. This method is usually only effective with small
quantities (up to approx. 100 l) because with large quantities the remainder
is not so heavily assessed as a percentage.
With higher throughputs (500 - 1000 l/min) this setting can also bring about
an improvement with larger intake quantities because the milk can be swirl-
ing very vigorously at the end due to the high throughput.
What action must be taken if fat values are above or below average?
The following action should be taken if the fat values are found to be
below or above average at the inspection and acceptance process for
the ULTRASAMPLER:
Check basic settings and parameters:
a) Remove intake cannula and check whether it is leaking or blocked
b) Check that the intake cannula is fitted and installed properly (against the
direction of flow, correct distance from pipe wall, needle bent?)
c) Replace sampler hose
d) Check whether the bottled sample volume tallies with the sample vol-
ume displayed on the controller
If the values vary by more than 10 %, the parameter "Flow at 20 mA" will
need to be adjusted.
This setting is incorrect in many cases
and is a frequent cause of com-
plaints!
e) Are the limits of the sampler being observed (restrictor for small quanti-
ties, throughput)?
f) Is the flow level scaling adequate (1400 l/m at NW 76 mm)?
