LI19 Hand-Held Read-Out Unit / Data Logger

Introduction

LI19 is typically used to display the measured solar radiation or heat flux. It measures a D.C voltage.

Once programmed with the sensitivity of the connected sensor, the display will show the actual value of the heat flux or solar radiation in W/m2.

LI19 is programmed through its PC user interface.

We recommend downloading the latest software.

LI19 is battery powered, using 2 x AA-type batteries. Fresh batteries allow more than 50 days of operation. The system is supplied in a practical transport case, for easy transport and protection

during field measurement campaigns. LI19 may be used with pyranometers and heat flux sensors.

Operation

Operation of LI19 is easy. Directions for use:

• switch on LI19, connect the sensor

• optional: mark the units of measurement on LI19, in the window below the display

• connect LI19 to a PC, using the USB cable and the LI19 software

• program sensor model and sensitivity

• switch off LI19 and restart LI19, check sensor sensitivity settings on the display (displayed 1 s after startup)

• optional: program the storage interval and starting time of storage. NOTE: switching off LI19 will discontinue data storage

• disconnect LI19 from the PC

• start a mobile measurement

• later actions: export data to the PC 

Suggested use

• short-term field measurement of solar radiation or heat flux

• amplification of heat flux sensor signals

• education in solar energy