Operating Instructions UVD 170S/340S
3
2 Installation
2.1 Positioning and Environment
The location of the instrument should conform to the following:
•
stable and free of vibration
•
free of large temperature variation and draughts
•
away from direct sunlight
•
capillary connections between the column and the flow cell should be of minimum length
to avoid peak broadening due to excessive dead volume.
Important:
Do not place any objects or stack additional instruments on top of the
detector. The ventilation slits on top of the unit must remain free at all
times.
2.2 Mains Connection
All units are generally factory set for operation at 230V. In the event that the mains supply
varies from this, it is necessary to alter the setting of the voltage selector, located on the rear
of the instrument, immediately above the mains socket (
→
figs. 1 and 3). The alteration
procedure is as follows:
•
Switch off the unit and disconnect the power cable.
•
Draw out the fuse cartridge using a small screwdriver (
→
fig. 1),
•
Using small pliers/tweezers to pull out the small voltage selection board from the power
supply module.
•
Place the board (writing facing up) under the required voltage selection, as shown in
fig. 2.
•
Turn the board so that the voltage selection can be seen, as shown in fig. 2.
•
Adjust the plastic clip as shown in fig. 2 (without turning the board). Ensure that the clip
locates in the notch on the board.
•
Now, replace the voltage selection board all the way back into the power supply module
(
→
fig. 2).
•
Finally, replace the fuse cartridge.
Important:
Upon installation of the instrument for the first time, the earth connection
and fuses should be checked.
Please note:
For minimum interference effects, all components of the analysis system
should be connected to the same mains output.
Warning:
Before attempting to alter the voltage selection or replace fuses, always
ensure that the
power cable
is
disconnected
.
