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LCD back-light
You can use LCD back-light, when your measurement is carried out in the dark situations.
[Light] key
1) Press [Light] key, LCD back-light goes on.
2) If you press [Light] key again, LCD back-light goes out.
The light automatically goes out in about 30 seconds after the light goes on.
3) When the batteries is low, LCD back-light dims.
NOTE
Use of LCD back-light shortens the life of the batteries.
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