GE AKTA avant User Manual page 147

Analog input signals
There are two analog input channels from which analog input signals can be used for
peak detection, or data collection in UNICORN. It is possible to auto-zero the input signals,
which means that the current value will be displayed as 0 V in UNICORN. This can be
done individually for the two analog input channels. The auto-zero value is saved between
runs and power-offs. The auto-zero value can be reset.
Parameter
Input signal range
Analog output signals
There are two analog output channels from which analog output signals and system
parameters, that is, UV, cond, conc B, temperature and pH, are transferred to the external
connected equipment, for example, light scattering detectors or plotters.
Parameter
Output signal range
Default output
Full scale output
Negative full scale
output
Fix point
Note:
ÄKTA avant User Manual 29035184 AE
Description
-2000 to 2000 mV
Description
-1000 to 1000 mV
The user defines the default output level for the selected signal.
The user sets the desired output signal value of, e.g., mAU, %
or mS, which will corresponds to the full scale output voltage
1000 mV.
The corresponding negative full scale output value is set auto-
matically. For example, if the full scale output is set to 2000
mAU, a UV value of 500 mAU will give an output voltage of
250 mV, and -100 mAU will give -50 mV output voltage. A signal
value of 0 mAU, 0% or 0 mS will always give an output voltage
of 0 mV.
Zero is always a fix point. A desired output signal of, i.e., 0 mAU,
0% or 0 mS corresponds to an output voltage of 0 mV. At
power-on, an output signal of 0 mV is transferred to the con-
nected equipment, until the output signal range values are
set.
No warning will be displayed in UNICORN if the analog output signal exceeds
the set full scale output value or is less than the set negative full scale output
value.
4 Optional instrument modules
4.12.2 Analog connector and signals
4.12 I/O-box
147