Vaisala SPS311, Technical Reference

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TECHNICAL REFERENCE ________________________________________________________
48 __________________________________________________________________ M210651EN-G
Replacing Batteries
The MPU112/MPU111 contains a lithium battery for the calendar
clock. Replacement of the battery may be needed after 10 years of
operation. The MPU121 battery does not need changing.
WARNING If the battery of the MPU112/MPU111 is replaced, please note that
lithium batteries can cause fire and burn hazard. DO NOT
RECHARGE, DISASSEMBLE, HEAT ABOVE +100°C (212°F),
OR INCINERATE THE BATTERY. Keep the battery out of reach of
children and preferably in the original package. If a battery is
swallowed, seek medical attention without delay. Avoid storage in
direct sunlight, high temperature or humid conditions. Avoid
condensation. Dispose of used batteries promptly and in accordance
with local environmental regulations.
Replacing the Plug-in Units
In the event of a fault, it is possible to replace plug-in units MRR111,
MRP111, MPU121, MPU112/MPU111, MWP312, MWP411,
MWP302 or MWV201 in the field.
To remove a unit:
- Disconnect the cables in the front panel of the unit.
- Open the upper and lower attachment screws.
- Push first the handle lock button to release the latch and then push
the whole handle down to unplug the unit. (Handle lock/push are
not used in unit MWV201.)
- Pull out the unit.
To install a unit:
- Place the unit into lower and upper card slide rails in the correct
card slot.
- Unlock the handle latch and push the unit almost completely into
the slot.
- Finally, lift the handle up to complete the push until the card is
fully in the slot and the handle latch is locked. (Handle lock/lift are
not used in unit MWV201).