Ankom ANKOM200 FIBER ANALYZER, Operator'S Manual

Page: 27 / 38

Operator’s Manual
Rev 1/24/20
pg. 27
39. Remove one filter bag from the Desiccant Pouch. Flatten the pouch to remove ambient air.
IMPORTANT:
To prevent moisture from settling on the filter bags, it is important to keep ambient
air out of the Desiccant Pouch while weighing the bags. This can be done by holding
the pouch flat or zipping it shut after removing filter bags. Zipping the bags too often
can reduce the life of the Desiccant Pouch.
40. Re-weigh the filter bag (W
3
) immediately.
41. Repeat steps 39 and 40 for each filter bag in the Desiccant Pouch.
42. Ash all filter bags in pre-weighed crucibles for 2 hours at 600°C ± 15°.
43. Cool the ashed crucibles in a conventional desiccator.
44. Weigh the ashed crucibles to calculate the loss of weight of organic matter (W
3
).
45. Calculate Crude Fiber using the following formula.
% Crude Fiber = 100 x (W
3
– (W
1
x C
1
))
W
2
Where: W
1
= Bag tare weight
W
2
= Sample weight
W
3
= Weight of Organic Matter (loss of weight on ignition of bag and fiber)
C
1
= Ash corrected blank bag factor (running average of loss of weight on
ignition of blank bag / original blank bag)