Preliminary Requirements

The following is a list of preliminary requirements for the OpenDendrometer:

Type	Requirement
shall	cost less than $60 in materials
shall	accommodate tree diameters >=100mm
shall	be able to be configured as a point dendrometer
shall	<= 10um linear displacement measurement accuracy, point dendrometer
shall	range of up to 12mm, point dendrometer
should	be able to be configured as a circumferential dendrometer
should	<= 0.025mm diameter change measurement accuracy, circumferential dendrometer
should	be able to be configured as a fruit dendrometer
should	<= 0.1mm diameter change measurement accuracy, fruit dendrometer
should	be human tamper proof
should	be wildlife tamper proof
shall	log length measurement twice an hour
shall	be capable of measuring both expansion and contraction
shall	alert the user when battery charge is low
shall	transfer data via Bluetooth
shall	be contained in a weatherproof enclosure
shall	operate within temperature range 0 to 55°C
should	operate within temperature range -20 to 55°C

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