YMJ-C Leaf Area Meter Instructions

YMJ-C Leaf Area Meter Instructions

The YMJ-C leaf area meter, also known as the living leaf area meter, is a new type of instrument that distinguishes it from the handheld leaf area meter. The living leaf area meter uses photo-electricity sensing to lay the leaves flat on the photosensitive plate, and then the instrument automatically displays the area of ​​the measured leaf.

Live leaf area meter technical indicators:

The single-blade measurement surface area is: 63800mm2

Blade length: 0-290mm

The maximum width is: 0-220mm

Resolution 0.1mm

Measurement accuracy: 2%

Measurement time: 1 second/time

Host Data Storage: 2000 Group

Battery: 12V high-capacity lithium ion rechargeable battery

Instrument size: 245×350×35(mm)

Display: LCD full Chinese liquid crystal display

Linearity error: ±0.2%±1 word of measurement value

Temperature characteristics: <±0.08%/°C±1 word of measurement value

Stability: Change <±2% within one year

Response time: 50ms

Application temperature: -30°C--80°C; relative humidity 0-100% (condensation without water vapor)

Interface: RS232

Living leaf area meter use method:

Power on the instrument: Press the start button to turn on the instrument. In order to ensure the measurement accuracy, it must be warmed up for 3 minutes after starting up. After warming up, please follow the on-screen instructions to perform the calibration. When accurate measurement is required, it can be used after warm-up for 40 minutes.

Calibration of the instrument: The instrument calibration function is an automatic calibration method to ensure the measurement accuracy when the parameters such as temperature increase, voltage drop and other parameters change during the measurement process. The instrument must be calibrated before use; the calibration method is as follows: first press “↑” key Calibrate selection interface, press this button will pop up select operation column. Press “↑” to calibrate, press “Test” to cancel the calibration; before confirming the calibration, you must ensure that the instrument test bench is clean and no sample can be placed. After the full-scale calibration prompts you to place the sample within 10 seconds, place the green calibration plate in the middle of the instrument. Note: The range of the calibration patch is the effective measurement range; the calibration function is applied to the start-up calibration and can also be calibrated after the measurement result is not ideal. Automatic calibration speed does not affect the user's detection speed.

Measurement: After calibration, press the "Measure" button to start the measurement. The measured result is directly displayed on the screen. Note: 1. The tested sample must be placed at the center of the measuring plate; Note: 2. If you want to repeat the measurement on the same sample, do not press the “measure” button several times directly according to the measurement principle of the instrument. The results measured by this method cannot be used as real test results. If you need to repeat the measurement, please open the upper cover of the measuring instrument for 2-5 seconds and then cover the light-emitting plate for each measurement gap. Press the “Measurement” button to perform multiple repeated measurement results. Otherwise measurement results.

Data storage: Each measurement result system is automatically saved. If you want to save for a long time, press the “save” key to save the data in the instrument's FLASH memory. Press the “View” key to view the history record.

Data view: After pressing the "View" button, the system enters the data view interface. Press: “↑” button to page up and press “↓” button to scroll down to view the operation. To exit the viewing function, press the "Test" button to exit the viewing.