Spectrometer

 

LI-180 handheld spectrometer allows for precise spectral measurements.

 

Specifications are as follows:

  • Wavelength Range: 380 to 780 nm
  • Wavelength Data Increment: 1 nm
  • Spectral Bandwidth: Approximately 12 nm (half-bandwidth)
  • Measurement Range:
    • 70 – 150,000 lx (lux)
    • 0.5 – 1,000 W/m2 (irradiance)
    • 1 – 3,000 μmol m-2 s-1 (PPFD)
    • Optional software for desktop and mobile here

Variables that can be measured:

  • PPFD for the PAR waveband
  • PFD
  • Custom Wavebands, Default Waveband Ratios, and Custom Waveband Ratios
  • Peak Wavelength (λp) and Peak Wavelength Value (λpV)
  • Irradiance (380nm ~ 780nm) Wm2
  • Integration Time (I-Time)
  • Illuminance (LUX)/Foot Candle (fc)
  • Correlated Color Temperature (CCT)
  • CIE 1931/1976 Chromaticity Coordinates
  • △x, △y, △u’, △v’, Delta uv (Duv)
  • Dominant Wavelength (λd)
  • Excitation Purity
  • Color Rendering Index (CRI, Ra)/R1 to R15
  • Spectral Power Distribution (SPD) mW/m2

How to use

 How to use with mobile device

How to download data 

How to use LI-180 spectrometer for snapshot measurements:

  1. Turn on by pressing the power button on the lower left of the equipment.
  2. Perform dark calibration by following prompt.
  3. On display, select OPTIONS and update Date and Time.
  4. Remove sensor cover. 
  5. To measure photon flux density at PAR or UV range, press PPFD on display.
  6. Press  the icon at the bottom-center to measure. You will hear a beep once measurement is completed.
  7. Press home icon once you are done.
  8. You can also measure wavebands or spectrum by choosing WAVEBANDS or SPECTRUM on display, respectively.  Repeat Step 6 and then Step 7.
  9. Press VARIABLES on display to customize variables.
  10. Press on the display and select your variable of interest.  Repeat until all four variables of interest are shown on display.
  11. Repeat Step 6.  Repeat step 7 once you are done.
  12. Press power button to turn off..

LI-180 may also be used to log data at specified intervals for several days.   You will need to connect LI-180 on a power supply.  Use "Logging", indicate desired "Interval" and start time under "Start".  Press icon on the bottom-center of the screen to start and stop logging.

How to use LI-180 spectrometer with mobile app:

Materials:

  • 180-08 Wifi SD Card with Micro SD in LI-180 Spectrometer SD slot
  • LI-180 Spectrometer app installed on your mobile device

Methods:

 A. On LI-180 Spectrometer:

  1. Turn on spectrometer and follow prompt on dark calibration.
  2. Go to Options.  Set correct date and Time.
  3. Remove spectrometer sensor cover. 
  4. Place spectrometer in desired location.

B: On Mobile device:

  1. Change WiFi connection of your mobile device to 180-08 WiFi SD Card. You may see WiFi icon with exclamation point to indicate unsecured connection. 
  2. Open LI-180 app on your mobile device.
  3. Select PPFD Spectrum on LI-180 app (mobile device).  Press the colorful circle icon to measure light intensities.
  4. Send data to desired email address by pressing the icon with 4 squares then select Mail.  Email will be sent after disconnecting to LI-180 SD Card WiFi and reconnecting to the internet.

How to download data:

Since this is a shared device, always copy your files after use.

  1. Connect LI-180 to your computer using the provided USB cable.
  2. Open USB Drive folder from File Explorer.  
  3. Copy desired files from USB Drive folder and paste to your destination folder.   
  4. Delete copied files from USB Drive folder. 
  5. Eject USB Device.
  6. Disconnect LI-180 from computer once it is safe to do so.

Need more info:  Go to LI-180 spectrometer webpage or read the LI-180 user guide.

 

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