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| Illustration 1 | g00690008 |
Location of Measuring Wheel | |
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| Illustration 2 | g00416638 |
(1) Measuring wheel. (2) Shaft. (3) Tree. (A) Depth of penetration. | |
The teeth of the measuring wheel penetrate the wood and the bark of the tree.
Measuring Wheel Pressure
The pressure that is on the measuring wheel must be correct. This will allow a correct measurement to be taken. If the pressure is too great, the measuring wheel will penetrate the tree too deeply. This will result in an inaccurate measurement. If the pressure of the measuring wheel is too high, see Illustration 2.
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| Illustration 3 | g00417038 |
(1) Measuring wheel. (2) Tree. (3) Section of tree with no marks from measuring wheel. (4) Marks that are left by the measuring wheel. (A) Area of the tree that is not measured by the measuring wheel. | |
The measuring wheel may bounce when an obstacle (A) is encountered. This may happen if the pressure that is on the measuring wheel is too low. See Illustration 3. This will result in an inaccurate measurement because the measuring wheel will not always be in contact with the tree.
Periodically check the logs for consistent marks that are left by the measuring wheel. Adjust the pressure of the measuring arm, if necessary. See Testing and Adjusting, RENR3005, "Measuring Arm Pressure" for information on setting the pressure on the measuring arm.
For more information on calibrating the length sensor, refer to Instruction Manual, SEBU7219, "DASA Measuring and Control System".