Control Unit - GE UV-1 User Manual

2.3 Control unit

Front panel controls
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13
14
Fig. 5. Control unit. Front panel.
No. Item
12 Absorbance range
selector
13 Mode switch
AU or %T
14 Baseline adjust
15 Indicator lamp
16 Mains switch
Description
Selector for the desired absorbance range
0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1 or 2 AU full scale
deflection. In the position SHORT, the signal output
terminals are disconnected from the rest of the control
circuitry and short-circuited. This position is useful when
setting zero on the recorder.
The AU / % T switch, enables the UV-1 to be used
to monitor the absorbance or transmission of a flowing
liquid. When the UV-1 is used in the AU mode, each of
the other position corresponds to the optical
absorbance which will give a full scale deflection (fsd)
on a recorder with a sensitivity of 10 mV. Absorbances
are measured relative to air or a liquid which is present
in the reference cell
When the recorder is used together with UV-1 in the
% T mode, the absorbance range selector switch is
used, together with baseline adjust, to adjust the
recorder response corresponding to 100 % T
Ten-turn potentiometer to adjust the recorder baseline
Indicates power is on
The UV-1 is turned on by switching this knob in the ON
(upper) position. The indicator lamp will light to show
that the mains voltage is on
2. General Description
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16
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