GE Monitor UV-900 - Chart Recorder and Noise Filtering

3 Operation
20 Monitor UV-900 User Manual 18-1120-05 Edition AF
3.9 Using an external chart recorder
3.9.1 Setting range and zero
The external chart recor der output from the instrument is alw ays 0–1 V , but the
absorbance value f or full scale deflection and t he Zero Absorbance level on the
recorder can be set.
1 Select main menu Set Analogue Out , press OK .
2 Set the range value in the sub menu Set Range and press OK . The range is
the full scale absorbance range for the chart recorder (1 V). Only fixed
steps between 5.0 A U and 0.01 AU can be set and the value is the same for
all 3 wavelengths.
3 Select menu Set Zero Level , press OK .
4 Set the value and press OK . This value determines where the zero
absorbance level should be in relation to full scale on the recorder.
The instrument has an automatic overrange
function. If during a peak the monitor signal
reaches the full scale value, the signal will drop
instantly to 0 V and give an accurate display of
the peak starting from this position.
3.9.2 Event mark
Event marks can be set, for example when the
sample is injected, and displayed as spikes on all
thre e channels of the chart re corder. The spikes are
10% of the full scale of the chart recorder which
corresponds to 0.1 V.
1 Select main menu Event mark , press OK .
Set Analogue Out
(2.000AUFS, 10%)
Set Range
(2.000AUFS) <0.1>
Set Zero Level
(10% of FS) 20
Range
AU
Overrange
Measured absorbance
level (A U)
Signal to
recorder (V)
0 V
1 V