MUST HAVE SHOULD HAVE COULD HAVE Module # Bonus

Screen Captures with notes The following set of slides provides the Screen captures of various Feeds These Slides can be used as a stand alone reference OR Used with the Practical Exercise, module 140. When used with module 140 it will give you an idea of what your screens should look like after the various exercises. The following set of slides is an actual chronological sequence of feeds and not a random selection

Material Path Parameters used for example data

First time Feed of a, GIW, K1 – (top half of screen) Very first Feed is always Spill Only Very first Feed is always Over Target Feed Time includes Drain Time

Very First Feed of a, GIW, K1 – (bottom half of screen) NOTE: All 6 Flow and Spill Status’s are GREEN Qi is waiting for an Acknowledge Command

Very First Feed of a, GIW, K1 – PAC Parameters K1 constant has been calculated K2 is ZERO (K1) x 27.7 = 20.15

Second Feed of a, GIW, K1 – (top half of screen) 2 nd Feed has now updated K1 2 nd Feed has smaller error Note Target and delivered

Second Feed of a, GIW, K1 – (Bottom half of screen) NOTE: All 6 Flow and Spill Status’s are GREEN

Our Materials Parameters after Feeds Note how the Averages have been updated

An Upset of +30 grams has been introduced A weight of 30 grams is added to the scale immediately after the Valve switches OFF This weight must be added during the Draintime This extra weight causes a large + error and is then seen as an Upset

An Upset has been introduced – a 30 gram object was placed on scale as the feed cutoff. (before Drain Time expired) Upset recognized, NO updates

An Upset has been introduced – a 30 gram object was placed on scale as the feed cutoff. (before Drain Time expired) Spill was outside 50% limits, therefore no update !

The next Feed without the +30 grams addded Parameters are updated Accuracy is back, the 30 gram upset has not affected accuracy

We will repeat the exercise with new “Wide Limits” Spill limits increased

Upset is accepted as Spill Limits are “Wide” Large error but K1 Parameters are still updated

Upset is accepted as Spill Limits are “Wide” All values are still seen to be “Normal”

We will do another Feed without the “Upset” Under Feed as previous Upset updated K1 Parameters

K1 bigger than the normal 0.72 value

Our Limits are now adjusted Once you know your “Normal” operating conditions it is advisable to reduce the Limits In our case we have reduced them to more reasonable Values In practice once you have run your system for a few days or weeks you would revisit these parameters Long term variance in your average Spills and Flow rates must be taken into account

Our Materials Parameters with new Limits

A few more Feeds are done to remove the “error” – results as below Reducing error

A few more Feeds are done to remove the “error” – results as below Reducing error

Upset #2 – Scale in motion at Start of Feed Stability warning

Upset #3 – Unstable Scale In this instance the Flow Rate at the Start of the Feed was greater than the “Unstable Flow rate Threshold” NOTE: in this instance the Feed FAILED to even START

Upset #2 – Flow > 5.0 AND < 10.0 Upset #3 – Flow > 10.0

Upset #3 – Unstable Scale at END of Feed Here the Scale was Unstable at the End of the Feed. This means Flow Rate was > 10.0 at the end of the Feed The Feed Aborted is NOT ON indicating Feed did Start PAC Parameters will NOT be updated