LI19 Handheld Unit / Datalogger
The LI19 Hand-held read-out unit / datalogger is a high accuracy handheld read-out unit / datalogger. It is used to make mobile measurements, for short term datalogging (as a static logger), and as an accurate millivolt amplifier directly connected to a PC. LI19 can be used with a variety of sensors. LI19’s most common application is with heat flux- and solar radiation sensors. LI19 battery life and memory allow continuous measurement for up to 50 days.
Suggested uses include:
- short-term field measurement of solar radiation or heat flux
- amplification of heat flux sensor signals
- education in solar energy
The LI19 may be used with pyranometers and heat flux sensors, typically to display the measured solar radiation or heat flux. It measures a DC 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 is built for easy use with a large size LCD, displaying quantities in W/m², and a USB connection. LI19 may be used with pyranometers and heat flux sensors.
Output on display
- heat flux, solar radiation
Input
- analogue voltage
Conversion
- division by the sensor sensitivity
Display definition
- 4 digits with sign
Display refreshment rate
- 1 s⁻¹
Calibration uncertainty
- 0.1 %
Temperature dependence
- < 0.5 % + 3 x 10⁻⁶ V over rated range
Sample rate
- 2 s⁻¹
Rated input range
- 6.25 to 200 x 10⁻³ V (selectable)
A/D conversion
- 16 bits
Stored measurement definition
- minimum maximum and average over storage interval with conversion to W/m²
Storage capacity
- 3518 measurements
Storage interval range
- 2 to 65535 s (selectable)
Compatibility with Hukseflux sensor models
- SR05-A1, HFP01, SBG01, HF03
Battery type
- 2 x AA
Internal power supply voltage
- 3 VDC
Battery life
- > 50 days (on fresh batteries)
Rated operating temperature range
- -10 to +40 °C
System requirements for use with PC
- Windows XP and higher
Connection to PC
- USB 1.1 / 2.0 low speed
User interface on PC
- LI19 software
IP protection class
- IP40
Connection to sensor
- 2 x (female chassis plug for 4 mm banana with screwed signal wire clamp)
Weight
- 0.175 kg (net) 1.3 kg with carrying case
Dimensions LI19
- (70 x 146 x 25) mm
Dimensions transport case
- (400 x 300 x 120) mm
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LI19 Handheld Unit / Datalogger
