5
Operating device in automatic mode
In automatic mode the device switch to more sensitive range, when intensity value decrease
below 8 percent of current range. When intensity rise over 100 percent of current range,
device automatically switches to less sensitive range.
During switching device displays SWITCHING message on the display. During this
period the intensity readout is not valid. On some conditions (slow filter selected, large
sudden change in intensity) the intensity might not be settled when SWITCHING message
disappear and additional waiting for valid value might be necessary.
Switching to automatic mode
While in manual mode, press
AUTO/MANUAL
button to switch to automatic mode.
Switching back to manual mode
While in automatic mode you can press
AUTO/MANUAL
button to switch back to manual
mode. By pressing
RANGE+
,
RANGE-
or
DIAG
while in automatic mode you switch back
to manual mode as well.
Operating device in manual mode
In manual mode, ranges must be switched manually by the user. When range is manually
switched, device displays SWITCHING message and goes through the switching procedure in
same manner as in automatic mode.
Switching to manual mode
While in automatic mode you can press
AUTO/MANUAL
button to switch to manual mode.
By pressing
RANGE+
,
RANGE-
or
DIAG
while in automatic mode you switch to manual
mode as well.
Switching back to automatic mode
While in manual mode, press
AUTO/MANUAL
button to switch to automatic mode.
Switching to less sensitive range
To switch to less sensitive range press
RANGE-
button.
Switching to more sensitive range
To switch to more sensitive range press
RANGE+
button.
Using references
To compute light attenuation directly during measurement there are two user references
available. When reference is set it displays the ratio between reference value and current value
in a logarithmic scale in dB. The value in logarithmic scale is computed using following
formula:
⋅
=
]
[
Re
]
[
log
10
]
[
AU
value
ference
AU
value
Intensity
dB
value
Log
