Why is LAI output 0 on my Decagon Devices Measuring Instruments?
If your LAI output is zero despite valid PAR readings above and below the canopy on your Decagon Devices Measuring Instruments, it's likely that the time or latitude/longitude settings are incorrect, causing Z to exceed 90 degrees. To fix this: 1. Go to the set date/time menu. 2. Ensure the time is in 24-hour format. 3. Verify the correct sign for your latitude and longitude.
What to do if I get an error message when I try to calibrate Decagon Devices Measuring Instruments?
If you receive an error message when calibrating your Decagon Devices Measuring Instruments, it's because the external sensor isn't reading a PAR value of 600µmol/m[2]s. Ensure the external sensor is attached and has a clear view of the sun. If it's overcast, wait for a sunny day when PAR levels exceed 600µmol/m[2]s to calibrate the sensor.
What to do if Decagon Devices Measuring Instruments displays a message about batteries on the screen?
If your Decagon Devices Measuring Instruments displays a message on the screen, it may be because the batteries are not properly inserted or they may need to be replaced. Reseat the batteries into the battery holder and cycle the power on the instrument.
Why does my Decagon Devices AccuPAR LP-80 display a message after changing batteries?
If the Decagon Devices Measuring Instruments displays a message on the screen, it may be because you are changing the batteries or loading new firmware. To resolve this, go to the configuration menu and ensure that the date and time are set correctly.
What happens when Decagon Devices Measuring Instruments displays a message about memory?
If the Decagon Devices Measuring Instruments displays a message on the screen, you may continue to view the real-time PAR values, configuration settings, and previously stored data while the memory is full.
Why does Decagon Devices AccuPAR LP-80 display a message about firmware updates?
If the Decagon Devices Measuring Instruments displays a message on the screen, it indicates that the instrument cannot download new firmware updates.
What to do if Decagon Devices AccuPAR LP-80 displays a message after firmware update?
If the Decagon Devices Measuring Instruments displays a message on the screen, it means your firmware was not loaded correctly. Visit Decagon’s website to check for available updates.
How to change settings when Decagon Devices AccuPAR LP-80 displays a message on the screen?
If the Decagon Devices Measuring Instruments displays a message on the screen, navigate to the PAR or Log menu and escape out of the active reading to change settings.
Why does Decagon Devices Measuring Instruments displays a message about saved records?
If the Decagon Devices Measuring Instruments displays a message on the screen, save a summary record on the PAR or Log menu by pressing ENTER if you have not saved any records or if you only have saved above and below records.
What happens if I press ESC when Decagon Devices AccuPAR LP-80 Measuring Instruments displays a message about custom location settings?
If the Decagon Devices Measuring Instruments displays a message on the screen, your custom location settings will be preserved if you press ESC.
Provides contact details and information required for effective technical support for the AccuPAR LP-80.
Details the procedure for sending the instrument for repair, including shipping and cost information.
Explains the function of each key on the LP-80 keypad for user interaction and navigation.
Guides users on how to perform above and below canopy PAR measurements using the PAR/LAI sampling menu.
Instructs on how to download stored data from the AccuPAR to a computer using the RS-232 cable.
Provides step-by-step instructions for downloading data from the AccuPAR LP-80 using the dedicated utility software.
Details the procedure for calibrating the AccuPAR's probe against the external PAR sensor for accurate readings.
Details how to adjust the calibration constant for the AccuPAR's external PAR sensor.
Explains the theoretical basis and equations used by the AccuPAR to calculate Leaf Area Index from PAR measurements.
Provides guidance on using the external PAR sensor for accurate above-canopy measurements, especially in variable light.
Explains the necessity and procedure for periodically recalibrating the AccuPAR and its external sensor.
Offers a quick reference guide to common problems and their potential solutions for the AccuPAR LP-80.
General| Measurement Type | Photosynthetically Active Radiation (PAR) |
|---|---|
| Sensor Type | Silicon photodiode |
| Spectral Range | 400 to 700 nm |
| Resolution | 1 µmol m⁻² s⁻¹ |
| Accuracy | ±5% |
| Number of Sensors | 1 |
| Output | Analog and digital |
| Power Supply | 5-15 VDC |
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