User manual MINOLTA SPAD-502 PLUS BROCHURE

[. . . ] NEW CHLOROPHYLL METER SPAD-502Plus A lightweight handheld meter for measuring the chlorophyll content of leaves without causing damage to plants. The SPAD-502Plus is a compact meter designed to help users improve crop quality and increase crop yield by providing an indication of the amount of chlorophyll present in plant leaves. The chlorophyll content of plant leaves is related to the condition of the plant, and thus can be used to determine when additional fertilizer is necessary. [. . . ] For a particular plant species, a higher SPAD value indicates a healthier plant. 3. 5 Leaf-blade nitrogen concentration 3. 3 3. 1 2. 9 2. 7 2. 5 2. 3 2. 1 1. 9 1. 7 y =0. 079 x - 0. 154 r =0. 908*** n =68 B Absorbance 1984 1985 24 26 28 30 32 34 36 38 40 42 400 500 600 700(nm) Measured SPAD value Ultraviolet Wavelength Infrared Wheat, Rice, Corn, Cotton and beyond The SPAD-502Plus serves in a wide variety of plant applications. Through its history, the SPAD series has established itself as a leading brand in chlorophyll measurement across the world. It has been serving researchers and growers, enabling them to perform field tests quickly and easily. The SPAD series has been used for various kinds of plants and its applications are still growing. Corn Wheat Features Trend graph display Changes in measurement data over time can be seen, and abnormal values can be noticed at a glance. Data memory The SPAD-502Plus has memory space for 30 measurements. Data in memory can be recalled or deleted at a later time, and the average value of all data in memory can be automatically calculated. Memory data count Average Error message Compact and lightweight for portability The SPAD-502Plus is small enough to fit in a pocket and is extremely lightweight (only 200 g) so it can be easily taken anywhere. Quick, easy measurements Measurements are taken by simply inserting a leaf and closing the measuring head. It is not necessary to cut the leaf, so the same leaf can be measured throughout the growing process. N= AVG 35. 8 Measuring head Measurement center line Reading checker A reading checker enables users to check that the SPAD-502 is functioning correctly and providing accurate readings. Water-resistant The SPAD-502Plus is water-resistant (IPX-4), so it can be used outside even in the rain. *It is not immersible, and should not be cleaned with water. Names of parts Depth stop Receptor window Low power consumption The SPAD-502Plus uses LED light sources, resulting in extremely low power consumption. One set of two AAsize alkaline-manganese batteries can provide approximately 20, 000 measurements. Press here to close. Power switch Small measuring area The measuring area is only 2 x 3 mm, allowing measurements of even small leaves. A sliding depth stop is included for accurate positioning on sample leaves. Display ALL DATA CLEAR button AVERAGE button Battery-chamber cover High accuracy High measuring accuracy (± 1. 0 SPAD unit for rice-plant leaves) allows close examination of growing conditions. 1 DATA DELETE button DATA RECALL button Nitrogen management Nitrogen (N) management is a very important issue for plant growers and for the environment. For growers, knowing the N requirement of plant enables the proper amount of N fertilizer supply to be managed. Some experiments show that the SPAD series contributed to reductions in the use of N fertilizer by tens of percents with no loss in yield. By optimizing the N fertilization efficiency in the field, proper N fertilizer management reduces the possiblity of excessive supply of fertilizer, which can cause diseases in plants and environmental contamination. There is increasing awareness of the need for applying the proper amount of N fertilizer in respect to water contamination in both flowing streams and underground water due to nutrient leaching through the field's soil. [. . . ] Using improper battery may cause a fire or electric shock. Registration No. : JQA-E-80027 Registration date : March 3, 1995 Registration date : March 12, 1997 ©2009 KONICA MINOLTA SENSING, INC. 9242-4856-10 AJKAPK 1 Printed in Japan [. . . ]