DASA 280 Measuring and Control System Caterpillar

Diameter Sensor - Inspect

Usage:

HH45 2JZ

The diameter sensor must be inspected daily. The inspection procedure must be performed in order to ensure that the diameters of the logs are measured correctly. An example of a diameter inspection chart is shown in Illustration 3. Perform the following procedure to inspect the diameter sensors.

Select a straight tree with a circular cross section. The tree should have a limited number of branches.

In the operating mode, process the tree. Lay the logs in order for easy identification.
Note: You should cut at least three logs for the inspection.

Press "8" in order to view the diameters of the cut logs. A printout of the list can be made by pressing "9".

Measure the top diameter of each log. Create a table that is similar to Table 1 of the "SHOWED DIAMETERS" on the display screen and the "MEASURED DIAMETERS". Subtract the "SHOWED DIAMETER" from the "MEASURED DIAMETER" for each log. Enter the difference in the table.

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Table 1
Log Number	Measured Diameter	Showed Diameter	Difference
Nr 1	450 mm	450 mm	0 mm
Nr 2	353 mm	350 mm	+3 mm
Nr 3	251 mm	250 mm	+1 mm
Nr 4	98 mm	100 mm	-2 mm

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Illustration 1	g00468841
Diameter Inspection Chart (Example) (1) "0 " line. (2) Log 4. (3) Log 3. (4) Log 2. (5) Log 1.

For each log, follow the "0" line until the value for the "SHOWED DIAMETER" is reached. Mark the "DIFFERENCE" from Table 1 on the millimeter line. Refer to Illustration 1.

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Illustration 2	g00468843
Completed Inspection Chart (Example)

When a minimum of 20 logs have been marked on the chart, draw a smooth line on the chart. Draw the line through the middle of the points. If the drawn line does not fall on the "0" line, the diameter sensor must be calibrated.