User manual

Z24.0.06.6C-02 Operating Manual GSF 50TF and GSF 50TFK page 4 of 4
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6 Measuring bales of straw hay bales
Always inject the electrodes form the plain side of round bales never from the round side, the probe can be
inserted much easier. For strongly pressed bales we suggest the probe GSF 40 or GSF 40 TF instead.
7 Wood Chips as fuel
Instrument settings for measuring wood chips:
GMH 3830/3850/3851 Version>= 1.5: h.461 (specialised GSF 38 / GSF 50 curve)
others: We recommend “Wood group C” (GMH 38x0 instruments: “h. C”). This group delivers a sufficient
accuracy for the fuel application up to 30% MC – above there is larger deviation.
Wood chips are classified in different quality groups.
The size and the moisture content (MC or u) or the wet-basis moisture content (w) are the measure for the
usability. Usually moisture content (w) of maximum 30% is recommended.
Chip size
Class
Size
G 30
small chips
smaller than 3 cm
G 50
mid size chips
3 – 5 cm
G 100
crude chips
5 – 10 cm
Moisture content
Class
Wet basis moisture content w
(can be displayed directly of GMH 3830 V>=1.5)
moisture content u
w 20
air dry
<20 % w
<25 % u
w 30
storable
20 – 30 % w
25 – 43 % u
w 35
conditionally storable
30 – 35 % w
43 – 54 % u
w 40
wet
35 – 40 % w
54 – 67 % u
w 50
fresh cut
40 – 50 % w
67 – 100 % u
The higher the moisture content, the lower is the heating value per weight!
7.1 Field measuring
At measuring in containers, silos, chip bunkers or similar storages and a measuring depth > 0.5 m commonly
the compression is high enough for direct measuring.
Although keep pressure on the handle during the measuring!
For measuring in less than 0.5 m or in loose bulk material, best is to step on the measuring spot and insert
the probe below the foot.
At values above 20%u the display may have falling values: The display after 10 seconds is valid!
7.2 Reference procedure: „Bucket test“
The probes from suitable places in Your material into a bucket ( (>=10 litre).
Compress: Step into the bucket and compress with roughly 10 kg. Measure under Your foot:
During measuring keep pressure on the handle!
Repeat Your measuring and take average of 3 measurings!
At values above 20%u the display may have falling values: The display after 10 seconds is valid!