Use of the sofware requires a PC with Windows 2000 or XP operating system and a USB interface. The software has built-in functionality for:
- programming the sensor sensitivity
- data logging functions

For each of these functions, the interface cable is required. This cable is used to connect a LI-19 to the USB bus on a PC. If your LI-19 comes bundled with a sensor, it may be that your dealer already programmed the sensor sensitivity into the LI-19, and that this function is disabled in the software. In that case, the optional interface cable and the software give you access to the data logging functions only.

Main window

After installation, the software can be started from the Start menu. The main window allows you to open a previously stored file with logged data.

LI-19 window

All other functions related to the LI-19 are available in special windows, that will open once you connect an LI-19 to USB interface cable to the PC. You can connect more than one of these interface cables to your PC, and for each of the interfaces a separate window will open. These windows may be on top of each other, move them around on your screen to reveal the ones that are covered.

Note that the buttons for ‘Sensor settings’ and ‘Calibrations’ may not be available on your version of the software.

When the PC cannot find a LI-19 connected to the cable, the caption of the window will be ‘Nothing connected’. To connect a LI-191, remove the bottom cover from the enclosure and locate the connector input. Insert the connector from the cable into the HRU1. The PC will automatically detect the LI-19. If the PC does not detect the LI-19, then check if the LI-19 is switched on, and check the batteries.

Once the LI-191 is detected, the caption of the window will show the serial number of the LI-19 that was connected.

Programming the sensor sensitivity

The software is used to program the sensor sensitivity into the LI-19. If the LI-19 came bundled with a sensor, your dealer may already have programmed the sensitivity of this sensor into the LI-19. If that is the case, the software you received may not have this option.

Manually

Manual control requires access to the ‘Calibrations’ sheet. If your software does not support that, you must use the Wizard. If you want to manually enter the sensor settings, the required HRU1 setup is determined in the following steps:

Switch to ‘Calibrations’ view. The full range output voltage of the sensor should be less than or equal to the full scale input voltage of the LI-19. The full range output voltage is used to select the maximum input stage amplification factor of the LI-19 in the software.

In the box that says ‘Input amplifier’ you can select the amplification that corresponds to the required full scale input.
The column ‘Multiplier’ on the left shows how many internal counts each input range will give you. Now switch back to the ‘Sensor settings’ view. The number that the LI-19 should display at the full scale input value is entered into the multiplier input field. The number of internal counts that corresponds to that full scale input (taken from the ‘calibrations’ sheet), is entered into the divider field.
The decimal dot position for the display is selected.
The HRU1 is programmed with the new settings.

Wizard

Alternatively, the settings are generated by software through the Wizard. Depending on the sensor sensitivity, the Wizard will select the optimal input stage amplification for the LI-19, and store appropriate values in the multiplier and divider fields. The position of the decimal dot in the display is also set. After the wizard is used, the LI-19 only has to be programmed to make it suitable for use with the specified sensor.

The Wizard was designed to accommodate most of the sensors made by Kipp&Zonen. The following sensors are supported:

Sensor	Full scale	Sensitivity
CMP3	2000 W/m2	5 .. 15 µV / W/m2
CMP6B	2000 W/m2	5 .. 15 µV / W/m2
CM11B	4000 W/m2	7 .. 14 µV / W/m2
CM21	4000 W/m2	7 .. 17 µV / W/m2
CM22	4000 W/m2	7 .. 14 µV / W/m2
CM4	4000 W/m2	7 µV / W/m2
SP Lite	2000 W/m2	60 .. 100 µV / W/m2
SP Lite *	4000 W/m2	9.5 .. 10.5 µV / W/m2
PAR Lite	10,000 µE/m2s	4 .. 6 µV / µE/m2s
LUX Lite	200.0 klux	5 .. 15 µV / 100 lux

New sensors are added all the time, so please keep your software updated (the latest release can be downloaded from the Download page).

Use the wizard to select the sensor model that is to be used, and then enter the sensitivity of the sensor.

Data logger

The PC software is used to enter the data logger setup, and to transfer the setup to the LI-19.

When the LI-19 is programmed with a new datalogger setup, the logger memory in the LI-19 is erased, and then the new settings are used to start a new logging sequence. The logging only stops when the logger memory is full, when the batteries are depleted, or when the LI-19 is switched off. The PC software can be used to check the logging activities of the LI-19, and the LI-19 also shows some display characters to indicate what it is doing.

Log interval

The log interval is entered in seconds. The pull-down box can be used to preset the correct number of seconds for some popular log intervals. Note that the pull-down is only used for selecting a preset, the number on the left is the log interval that will be transferred to, and used by, the data logger in the LI-19.

Initial delay

When logging starts, an optional delay is used to postpone the start of the first logging interval until a specified date and time. This date and time at which the first interval will start, can be entered in the PC software. When the logger is busy counting down the delay for the first logging interval, the LCD on the LI-19 shows an ‘l’ that flashes at a slow ( 1 second on, one second off) rate.

Logging

Once the initial delay has elapsed (the initial delay can be 0) the first logging interval is started. The HRU1 is now actually logging, and the ‘l’ on the LCD flashes rapidly ( ½ second on, ½ second off)

Logged values

During a logging interval, the LI-19 accumulates minimum input value, maximum input value, and average input value. Once the logging interval has elapsed, the values are stored in the logger memory and the next interval is started. Each time the LI-19 stores a new set of values in the logger memory, it flashes the ‘m’ sign on the display. Logging only stops when the logger memory is full, when the batteries are depleted, or when the LI-19 is switched off.

Read status

You can view the logger status while the logger is active. Reading the status will not interfere with the logging process.

The status will show what the logger is doing, how much time remains in the current interval (if the logger is logging) and what the measured values are. The logger measures an integral over the logging interval. The PC software uses the integral and the interval period to calculate an average value over the logging interval.

Read data

Use the PC software to read the logger memory from the LI-19. You can do this while the LI-19 is logging, reading data will not interfere with the logging process. When the data from the logger memory is collected, it will be presented in a chart.

The Y scale can be manually set, and you can also use the mouse to zoom in on a specific area of the chart. Drag the mouse pointer from the top left corner of the area of interest, to the bottom right corner of the area of interest. When the mouse is released, the chart will zoom in on the selected area.

Drag the mouse from bottom right to top left to zoom out again.

Save the data in a logger data file, or export the data in a text format that can be imported in a spreadsheet.

Use the Copy button to place the chart on the clipboard, ready to be pasted into a word document.