Specifications Measured Parameters: Optical absorbency in two different wave bands (530 nm and 931 nm). Designed to measure chlorophyll content and compensate for leaf thickness. Measurement Area: 3/8" diameter circle, (0.71 cm2). Resolution: +/- 0.1 ACI Unit. Repeatability: +/- 1%. Source: (1) LED (peak at 530nm). (1) Infrared LED (peak at 931 nm). Detector: Silicon photodiode with integral amplifier for absorptance measurement and source power monitoring for temperature compensation. Storage Capacity: Between 94,000 and 160,000 measurements. Modes: Single point measurement,2 to 30 point averaging 10 to 30 point averaging with elimination of fliers outside a two sigma range. Comments: Alpha numeric comments may be added with each measurement or only when there is a change that requires notes. User Interface: 128 x 32 pixel display, 6 keys for control and data manipulation, beep signal for status and warnings. Output: USB 1.1 and RS-232 interface for GPS. Temperature Range: 0-50Deg.C. Temperature Drift: Temperature compensated source and detector circuitry for minimum drift over full range. Power Source: 9V Alkaline Battery.
