version
H27507.16.07
Stop-clock battery
Centi-second timer module battery
Two AA cells should provide at least 12
months use. To replace the cells, remove
the two screws from the back plate, and
remove the exhausted cells, observing the
polarity, and insert a new one. Older
stopclocks have a single AA cell.
The module requires two SR44 silver oxide
button cells. To replace: unplug the module
from the stop-clock, remove the base,
slacken the retaining screws, replace the
cells (observing the polarity), retighten the
retaining screws and replace the base.
Light Gates – please refer to the light gate’s own instruction manual (NFU 401) for support
using this apparatus. Contact Philip Harris for a copy.
Safety advice
This advice is not a replacement for a formal risk assessment, which should be carried out
according to your school or LEA policy.
Warnings
For your safety, this product should be used in accordance with these instructions, otherwise
the protection provided may be impaired.
