electronic scientific calculator 12 digits instructions

The photograph above shows the typical bottle shape of the early instrument type CRT and its metal shielding casing. Anyone who has seen inside a modern television or computer monitor (danger - very high voltages present when in use) will have seen the much fatter, squatter versions which are still used.

On the right of the tube is the electron gun, where a heated filament produces a cloud of electrons. These are focused into a beam and accelerated towards the fluorescent display screen on the left by an anode with a high positive voltage. The beam is deflected to write the electron beam on the fluorescent display and so produce the visible numbers.

12 digits desktop calculators

AA battery, solar, two-way power

Big Display

Certifications: RoHS Directive-compliant, CE

Service: customized logo, color, brand name

Packing: color box with customized logo

Size: 148x185x41mm

Packing specification:

Inner carton: 20 pieces

Outer carton: 80 pieces

Size: 36.5x37.2x58cm

Net weight: 11.60 kg

Gross weight: 16.70 kg

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