THORLABS PM320E, Руководство по эксплуатации

Страница: 59 / 70

© 2016 Thorlabs GmbH
7 Maintenance and Service
57
7 Maintenance and Service
Protect the PM320E from adverse weather conditions. The PM320E is not water resistant.
Attention
To avoid damage to the instrument, do not expose it to spray, liquids or solvents!
If necessary the unit and the display can be cleaned with a cloth dampened with water.
The unit does not need a regular maintenance by the user. It does not contain any modules
and/or components that could be repaired by the user himself. If a malfunction occurs, please
contact
Thorlabs for return instructions.
Do not remove covers!
To guarantee the specifications over a long period it is recommended to have the unit
calibrated by Thorlabs once a year.
7.1 Line Voltage Setting
The PM320E optical power meter operates at fixed line voltages of
100 V +10% -10% (90 V … 115 V) or
115 V +10% -10% (104 V … 132 V) or
230 V +10% -10% (207 V … 264 V).
The line voltage setting can be changed on the rear without opening the unit.
1. Turn off the PM320E and disconnect the mains cable.
2. The fuse holder (see figure below) is located below the 3-pole mains power jack. Release
the fuse holder by pressing its plastic retainers with the aid of a small screwdriver. The
retainers are located on the right and left side of the holder and must be pressed towards the
center.
3. Unplug the line voltage switch/indicator (containing the left fuse) from the fuse holder, rotate
it until the appropriate voltage marking (100V, 115V, or 230V) is on target for the window of
the fuse holder, and plug it back into the fuse holder. Press in the fuse holder until it locks on
both sides. The appropriate line voltage marking must be visible in the window of the fuse
holder.
Attention
If you have changed to or from 230 V, also change the mains fuses to the correct value given in
section
Exchange Mains Fuses !