Resetting filter time
The time the current filter has been used can be shown in hours and resetted to zero.
There is one time counter for each filter wavelength.
Display
Action
Step
Select menu
Reset Filter Time
, press
OK
.
1
Display toggles between
yes
and
no
. Select
yes
to
reset the time counter for the current filter wave-
length, press
OK
.
2
5.6
Autozero
The autozero function sets the detected absorbance to zero when the
autozero
key is
pressed. Autozero is recommended before a sample is injected.
Press
autozero
key. The absorbance value is then shown in main operating menu.
5.7
Reading absorbance values
The main operating menu shows the absorbance values. The menu is reached from any
other menu by pressing the
Esc
key repeatedly.
5.8
Setup menu
Setting analog output to an
external chart recorder
Setting range and zero
UVis-920 displays the measured absorbance value as an analog voltage in the recorder
connector. The output from the instrument is always 0 V to 1 V, but the absorbance
value for full scale deflection (AUFS) and the zero absorbance level on the recorder can
be set.
Display
Action
Step
Select menu
Analog Out
, press
OK
.
1
Monitor UVis-920 Operating Instructions 29055049 AD
45
5 Operation
5.5 Custom filters
