User manual

3.5 Reading the UV absorbance value
The main menu 1 shows the absorbance value with four digits
for the chosen wavelength. This menu is reached from any other
menu by pressing ESC.
If the lamp is off, Lamp Off is displayed instead.
3.6 Autozeroing UV
The autozero function in the UV part of the module sets the detected
absorbance to zero when
OK is pressed. Using autozero is
recommended at the start before the sample is injected.
1 From main menu 1, turn the dial one step clockwise to select
Autozero UV, then press OK. The normal absorbance value
display is then shown.
In UNICORN, Autozero is set with the instruction
AutoZeroUV in
System Control:Manual:Alarm&Mon.
3.7 Creating eventmarks
Eventmarks can be set and displayed as spikes on the UV curve, for
example, when the sample is injected. The spikes are 10% of the full
scale AU setting.
1 From main menu 1, turn the dial two steps clockwise to select
Eventmark, then press OK. A spike on the UV curve is created.
3.8 Setting Cond, pH and UV analogue outputs
This settings menu is used to set measurement parameters (zero and
full range values) for Cond, pH and UV on the analogue output
channels. The analogue output channels can be connected to a chart
recorder, for example.
From the main menu 1, turn the dial four steps clockwise to enter
the menu
Set Parameters. Click OK, select the quantity to set by
moving the cursor with the dial, then click OK again.
Note: The user interface of the monitor must be unlocked if
connected to a UNICORN control system.
Setting the Cond analogue output
1 Current analogue settings are displayed (zero and full scale
values).
Set Cond Analog. Out
Set Parameters
Set Parameters
Eventmark
Autozero UV
AU Cond%Tc pH
Monitor UPC-900
User Manual 18-1125-55 Edition AE
14
3 Operation
Absorbance value