DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 3-4/2023 str. 26 <-- 26 --> PDF |
A tachometer was used to show the engine speed during operation. Chainsaw fuel was supplied from a company that is in easy access to operators, has a widespread gas station and offers fuel analysis to consumers. The type of SAE 10W synthetic engine oil recommended by the chainsaw manufacturer was used. Again, the mixture ratio of the 1 part oil to 40 parts petrol was prepared with the help of a scale at recommended values. The measurement was started after 15 minutes of warm-up to reach the desired temperature. Method Metoda In this study, the proximity of the chainsaw operator to the chainsaw is considered during working on the slopes (Figure 3). The measurement values of CO were sampled at the shortest possible distance ±4 cm, 10 cm, 20 cm and 30 cm away from the exhaust outlet of the chainsaw considering the head location of chainsaw operator. Measurement studies were carried out on the upper part of the first exit point of the exhaust gas. The idling speed of the chainsaw was constantly tried to be kept between 1900 and 2200 rpm. Measurements were made by reading data directly from the electronic gas sensor display. Fifteen minutes of measurements were taken for each distance interval between the chainsaw and the operator. For each measurement distance, the duration of measurement was 15 minutes, and the sampling interval was one second. Therefore, the total measurement time for |