Calculators: Handheld: Adler 80S (aka EC 22B)
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Size
(approx): |
75mm x 120mm x 20mm (w,h,d)
Weight 128g excluding batteries |
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Power:
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6V DC, 4 x AAA size
battery. Also accepts adapter (undefined). Socket is on bottom
side on the
right. Socket is 2mm jack-plug, centre negative. |
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Case: |
Square case with
back and sides made of one piece of brushed aluminium. Dark brown
plastic calculator body slides down nearly half way to reveal battery
compartment. Pronounced ridges on the side to aid grip.
Squishy but positive action buttons. Logo and model number is printed
on inset aluminium panel. Logo is also painted on the top side.
The green, slightly sloping display filter gives a clean bright image. |
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Display: |
8 digit green VFD (ninth digit for error and
negative flags) |
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Features: |
4 function calculator
with percentages, pi, square root and change sign. |
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Age: |
est. 1975/6 |
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Manufacturer: |
TA Vertriebs GmbH,
D8500 Nurnberg, Germany. Type EC 22B, Serial No. 68.158.956 |
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Comments:
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Unusual slide out
design clear display and weighty quality-feeling calculator. Button
colours are a bit of a jumble. Otherwise sound logic let down by
negative square roots and no input overflow suppression. Black plastic case
is open topped, rigid front and back and very square in design. |
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| Components: |
1 x cpu: NEC D1801C H63096 28
pin DIL
1 x flat faced glass encapsulated nine digit VFD display
2 x transistors
6 x diodes
6 x capacitors
3 x resistors
1 x transformer: DCT 40 |
| Boards: |
The keyboard board
is held onto the keyboard via 12 screws and joined to the cpu board (Ref.
T-80Sa-801S) via 15 stiff copper wires. |
| Construction: |
To open, gently force the
"U" shaped aluminium back fully off. Then gently prize off
the top back and bottom two side lugs. The whole calculator then
lifts off the front panel. |
| Logic comments: |
The (Cl) button is used to clear
last entry of a number and (C) to clear the whole calculator |
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Overflow on number input is not suppressed,
typing in a nine digit number results in a "C" in the ninth
digit, but it is recoverable using (Cl) |
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An overflow error is flagged by
a "C" in the ninth digit, "E" if negative. It is
recoverable using (Cl). |
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Divide by zero results in a
"C" which is not recoverable. |
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Negative square roots are
allowed. |
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There is automatic constant on
all four functions |
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Negative numbers are flagged by
a "-" sign in the ninth digit. |
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