BS ISO 5687:2018 pdf download

BS ISO 5687:2018 pdf download.Equipment for harvesting — Combine harvesters — Determination and designation of grain tank capacity and unloading device performance
4 Test method
4.1 Test machine
4.1.1 The test combine harvester shall be identified as to make, model year, machine identification number, grain-unloading device description, and other pertinent information.
4.1.2 The terminology and methods or measurement defined in ISO 6689‑ 1 shall be used where applicable.
4.1.3 The combine harvester used for the test shall be equipped with a header typically used to harvest the wheat. The machine configuration shall be documented in the test report.
4.1.4 At the time of the test, the test combine harvester shall be in good working order with all working surfaces free of rust, grease or other impediments to normal operation. A run-in period of minimum 3 grain tank fill‑ and‑ empty cycles is required to ensure this condition on a new combine harvester, or one that has not been used recently.
4.2 Test preparations
4.2.1 During all portions of the test, the combine harvester shall be stationary, placed horizontally on a level surface and running at rated speeds with the feed table (header) and threshing mechanisms engaged. During the unloading portion of the test, the unloading device shall also be engaged at rated speed with the feed table (header) and threshing mechanisms previously engaged.
4.2.2 The wheat used for testing shall have a wet basis moisture content between 10 % and 17 %, measured in accordance with ISO 712, and a maximum impurity level of 3 %, measured in accordance with ISO 7970. The mass per litre of the test wheat should be no less than 0,73 kg/l and no greater than 0,81 kg/l in accordance with ISO 7971-2. A sample of the test wheat shall be taken. The wet basis moisture content, and the impurity content, in percent by mass, shall be determined and recorded. The mass per litre, in kg/l, shall be determined and recorded.
4.3.2.1 Recommended procedure is to unload the combine and continuously measure weight vs time at a minimum frequency of 5 Hz. Commence unloading the test wheat from the combine harvester grain tank using the combine’s grain-unloading device operating at its rated speed into a suitable collection area for weighing the wheat, at the same time recording the weight vs time. The starting time is the moment when the unloading switch or lever is activated by the operator. Continue unloading for 30 s after the flow of wheat stops to ensure sufficient data collection. The point at which the grain tank is effectively empty will be calculated as described in 5.2.1.