Display
Action
Step
Select menu
Set Range
, press
OK
. The range is the
full scale absorbance for the chart recorder (1 V).
2
Use the
arrow
keys to set the absorption range for
recorder output in AUFS, press
OK
. Only fixed steps
between 5.0 AUFS and 0.001 AUFS can be set.
3
Select menu
Set Zero Level
, press
OK
. The zero level
is where on the paper the 0 AU value will be posi-
tioned. Values 0-99.
4
Use the
arrow
keys to set the value and press
OK
.
5
Automatic overrange
The instrument has an automatic overrange function. If the monitor signal reaches the
full scale value on the recorder, the signal will instantly drop to 0 V and give an accurate
display of the peak starting from this position. When the function is disabled, the signal
does not drop to 0 V when reaching maximum but is instead clipped and hold at the
maximum (see illustration below). The overrange is managed in the same way when the
signal reaches the minimum.
AU
V
1 V
0 V
AU
V
1 V
0 V
1
4
2
3
1
4
2
3
AU
V
1 V
0 V
AU
V
1 V
0 V
1
4
2
3
1
4
2
3
a) Automatic overrange enabled
b) Automatic overrange disabled
46
Monitor UVis-920 Operating Instructions 29055049 AD
5 Operation
5.8 Setup menu
