Chlorophyll measuring instrument

Chlorophyll measuring instrument

1. Two LED light sources emit two types of light, one is red light (peak wavelength 650nm) and the other is infrared light (940nm). The two types of light penetrate the blades and hit the receiver. The light signal is converted into an analog signal, which is amplified by an amplifier and converted into a digital signal by an analog/digital converter. The digital signal is processed by a microprocessor to calculate the SPAD value and displayed on the screen.

2. InstrumentsCalibration and Calculation of Measurement Values

（1) During the calibration process, the pressure head does not clamp the sample, and two LEDs emit light in sequence. The received light is converted into an electrical signal, and the ratio of light intensity is used to calculate.

(2) After clamping the sample with the pressure head, the two LEDs emit light again, and the light transmitted through the blades hits the receiver, which is converted into an electrical signal. The intensity ratio of the transmitted light is calculated.

(3) The values of steps 1 and 2 are used to calculate the SPAD measurement value, which represents the current relative chlorophyll content of the clamped sample leaves.

technical indicators

1. Measurement range Chlorophyll: 0.0-99.9SPAD Nitrogen content: 0.0-99.9mg/g Leaf surface humidity: 0.0-99.9RH% Leaf surface temperature: -10-99.9 ℃

2. Measuring area 2mm * 2mm

3. Measurement accuracy of chlorophyll:Within ± 3.0 SPAD units (SPAD value between 0-50 at room temperature) Nitrogen content: ± 5% Leaf surface humidity: ± 5% Leaf surface temperature: ± 0.5 ℃

4. Repetitive chlorophyll: within ± 0.3 SPAD units (SPAD value between 0-50)Nitrogen content: ± 0.5 Unit leaf surface humidity: ± 0.5 Unit leaf surface temperature: ± 0.2 ℃

5. The measurement time interval is less than 3 seconds

6. Data storage capacity 32KB

7. Power supply 4.2V rechargeable lithium battery

8. Battery capacity 2000mAh

9. Weight 200g

10. Working and storage environment -10 ℃~50 ℃ ≤ 85% relative humidity

Precautions

1. Keep the measurement location clean to avoid affecting the measurement results

2. Regularly check the battery level and charge it promptly when it is low.

3. BecauseinstrumentThe relative chlorophyll content is measured by infrared light, so it is advisable to avoid direct sunlight during the measurement and use a slight cover such as the body.

4. IfinstrumentIf not used for a long time, please charge the instrument every two weeks.

Fault handling

1. IfChlorophyll detectorThe calibration cannot pass normally. Clean the measuring area with alcohol. If it still does not work, please charge the instrument for 1 hour and try again. If the above methods cannot solve the problem, please contact our after-sales customer service in a timely manner.

2. If the calibration passes but the measurement results deviate significantly each time, check the battery level first. When the battery level is fine, turn off the device for 5 minutes and then restart the device for calibration before proceeding with the measurement.

Packing List

Name: Beijing Zhongkawihe Technology Development Co., Ltd

Chlorophyll measuring instrument