What is it?
atLEAF CHL STD is a powerful, handheld, easy to use device for
noninvasively measuring the relative chlorophyll content of green leaf plants.
Chlorophyll content can be an indicator of the plant’s condition.
How does it work?
Plant relative chlorophyll concentration is measured by inserting a leaf into the device aperture.
Green leaves of up to 0.1 inch (3mm) thickness can be measured. It only takes one press
of the key to perform a basic measurement.
By utilizing the four atLEAF CHL STD keys you can:
view up to 64 measurements stored in the device’s memory
delete the most recently performed measurement
delete all measurements
perform instrument calibration
Specifications
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Measuring System
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Optical density difference at 2 wavelengths (640nm and 940nm)
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Keys
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4 keys to operate all functions; simple, one-key operation to perform measurements only
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Display
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2 lines x 16 characters
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Data Memory Capacity
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64 measurements
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Power Source
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2 AA (1.5V) batteries
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Battery Life
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5,000-30,000 measures, depending on use and batteries type
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Time to perform a measure
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Less than 1 sec
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Dimensions (W x D x H)
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6.9 x 2 x 1.8 inches (175 x 50 x 45 mm)
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Weight
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5.8oz (165g), not including batteries
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Auto power off
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after 1 minute of inactivity
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| Note: |
there is an inaccurate description in the CHL STD user manual Ver. 1.0 on page 10.
The following feature is not implemented in the CHL STD meter:
By pressing and holding down the Enter key, the device will continue to do successive measurements while automatically calculating the mean value. When releasing the Enter key the calculated mean value is displayed and stored.
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Each atLEAF device is assembled, tested and calibrated in the United States.
