– 7–
2.4.1 Zeroing
That option is used to detectors’ dark current and measurement channel offset voltage
compensation to set indication to zero when there is no input signal in both channels.
CAUTION: Zeroing can be started only when measuring probe is covered. Otherwise,
measured results will be inaccurate.
2.4.2 Memory
The instrument is equipped with a measurement memory. Using the memory is possible
from menu system level, by submenus: save, load, erase. Once you have selected one of
the three available options, you will see a list of memory cells.
The list shows the illuminance and irradiance values in the cell, or "none" if the cell is empty.
Use the keys to select an active memory cell. performs a save, load or
erase operation. In erase submenu, using button when empty cell is selected erase all
measurement memory (this operation requires additional confirmation in the dialog box
shown).
2.4.3 Calibration
This menu allows to check calibration factors and to adjust indicated value by changing that
calibration factors in both channels. After entering the menu, calibration factors for both
channels are displayed. Measuring channel should be selected. On the next screen current
measured value is displayed. This number should be edited to obtain proper measured
value, using buttons to change digit value or unit prefix and button to select
active digit and unit prefix. After pushing button, old and new calibration factors are
displayed. Another pushing of button accept changed calibration factor value. Pushing
key in any time cancels adjustment and back to the main adjustment menu.
2.4.4 Setup
2.4.4.1 Contrast
In this menu LCD contrast can be adjusted. Changing of contrast is made using buttons
. Button turns backlight on and off during regulation. New contrast setting
can be accepted using button .
2.4.4.2 Autooff function
This setting allows to save battery life. When the option is turned on, instrument will be
switched off after set time from last pushing of any button. Buttons are used to
turn the function on or off. Autooff time can be set using buttons to change
value of the digit and button to change active digit when the function is ON. Time is
set in format: hh:mm:ss (hours, minutes, seconds). The minimal time is 30s. New setting
can be accepted using button .
2.4.4.3 Backlight
This menu allows to manage meters’ backlight. There are three options, which can be
changed using buttons:
• On – backlight always on (shortest battery life),
• Off – backlight always off (maximum battery life),
