Buchi UV Monitor C-630 Handbuch Seite 11

Büchi UV Monitor C-630
signal: 0.0000
♦λ:254 t: 1
The signal or main menu contains the data signal intensity signal:,
wavelength λ:, time constant t: and the lamp status.
The actual measured signal value is shown in a fixed point manner
with four digits. The measurement wavelength λ: can be selected out
of the standard values 200, 220, 254, 280 nm, and if choosen of your
optional filters.
Using a time constant you can achieve a signal smoothing. The time
constant t: can be set to the values of 0.1, 0.2, 0.5, 1, 2, 5 or 10
seconds. The larger this value is set the more the signal will be
smoothed. A time constant of 1 s fits most of analytical purposes best.
The INT menu
This menu is for information only, no changes are possible.
INT sig:0.6543
♦1/8 ref:0.3848
The values sig and ref record the light intensities of the signal and
reference channel respectively. The sig and ref values are in the range
between 0 and 1. They depend on the selected wavelength, the solvent
in use, the flow cell as well as on the age of the lamp. The ratio of both
the values should be between 1:1.5 and 1:1.8. Significant deviations are
an indicator for instance for a dirty lens or a to strong absorption of the
solvent at the selected wavelength.
The value 1/8 behind the rhombus in the second line is a measure for
the integration time and it is only of interest in case of servicing.
The ANALOG OUT menu
ANALOG OUT:
♦full scale:
The ANALOG OUT menu is used for calibration of the analog output
signals. Generally the maximum output signal is 1 V. In accordance
with your actual conditions you can determine how many AU
correspond to this signal maximum or full scale deflection. The
values of 1e-4, 2e-4, 5e-4, 1e-3, 2e-3, 5e-3, 1e-2, 2e-2, 5e-2, 1e-1,
2e-1, 5e-1, 1e-0, 2e-0, 5e-0 or 1e+1 AU (corresponding to 0.0001,
0.0002, 0.0005, 0.001, 0.002, 0.005, 0.01, 0.02, 0.05, 0.1, 0.2, 0.5 1,
2, 5 and 10 AU respectively) are selectable.
[au]
2e-0
9