Steren K-310 Manual De Instrucciones página 17

If the watch shows a weak display, try one of the following
solutions:
Give it time, the signal is sometimes weak at first, but it gets stronger after a short
time.
Examine metal bars if they are oxidized, use paper to remove rust.
Try to place the metal bars closer (but not touching). Driving will be best if the
distance between the plates is shorter.
If there is no reaction, check all the connection points. Make sure that the
connection points are correctly and securely in place. Also check that the
polarities are correct. Make sure that the negative (black wires) and positive (red
wires) terminals are connected correctly.
Check if the metal bars are in contact, causing short circuits, if so, separate them.
HOW DOES IT WORK
Metal bars and potatoes make a simple battery that creates electricity to run the
clock. Each potato acts as a device called an electrochemical cell. It converts the
chemical energy stored in the metal bars into electrical energy. It takes two
potatoes to make the electricity strong enough to run the clock.
A cell works because of the chemical properties of the metals inside (in this case
copper and magnesium). The different properties cause small charged particles
of electricity (called ions) to move between the two metal bars. This flow is an
electric current. The potato contains the particles that allow the current to flow,
but it stops the contact of the metals. The electric current also flows along the
wires between the magnesium, copper and clock bars. This current makes the
clock work.
TROUBLE SHOOTING 7