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Calculators: Handheld: Sharp Elsimate EL-8131
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Size (approx): | 80mm x 131mm x 21mm (max) (w,h,d) Weight 138g excluding batteries |
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Power: |
3V DC, 2 x AA size battery. Also accepts adapter (EA-17E) which can be used as a charger. Socket at top side on the left. Consumption 0.35W. Back says use rechargeable battery EA-18B, 2.4V. Mangan [sic] batteries are quoted as lasting 14 hours continuous use. The on/off switch is on the left hand side in line with the Sharp logo. | ||
| Case: | Slim two piece plastic case, the front being micro-lined black plastic and the back smooth white plastic. Small brushed aluminium plate above the display is printed white and red for the company name and model number. Above it sits a metallic sticker for "Made in Korea". A green plastic display filter has the reminder for error, memory and minus printed underneath. It is flat and flush with its own black plastic escutcheon with silver trim and gives a reasonable display. The keys are squishy but work well. | ||
| Display: | 8 digit green VFD with a ninth (right-most) digit used for minus, memory and error indictors | ||
| Features: | 4 function calculator with percentages, square root, register exchange and four function memory | ||
| Age: | 1979 | ||
| Manufacturer: | Sharp Corporation. Made in Japan. Serial number 98288315 is on a sticker on the inside of the battery compartment as well as on the box. | ||
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Comments:
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Typical heavy Sharp that fits quite well in the hand especially with the on/off switch at perfect thumb position. Does one really need to know that minus is represented by a "-" sign!. Odd right hand digit use for error flags and minus is common to Sharp. The logic is quite good. |
| Components: | 1 x cpu: Sharp LI2026A 9D5 016
(1979 date code), 28 pin DIL, 0.6" width [also have one coded 8C 38
which is early 1978] 1 x 9 digit VFD; single glass tube flat faced, Futaba 9-ST-20 1 x transistor 4 x diodes 5 x capacitors 3 x resistors 1 x transformer; TDK 1457 |
| Boards: | The main cpu board (F163?) floats on top of the keyboard assembly and is joined by a 15-way ribbon cable. The keyboard assembly is metal backed, very sturdy and fixed to the front with two screws. |
| Construction: | Remove the two screws from the back. Quite difficult to open without damage. The best way appears to be by levering out the two lugs on the bottom side and hinging from the top two large lugs you can see in the battery compartment. |
| Logic comments: | The (CE) button is used to clear last entry of a number and the (C) to clear the whole calculator. |
| Overflow on number input is suppressed, typing in a nine digit number ignores the ninth digit | |
| An overflow shows the result and "C" ("E" if negative) in the far right (first) digit and is recoverable using (CE) | |
| Divide by zero shows "0.C" and is not recoverable | |
| There is automatic constant on multiply and divide only | |
| Negative numbers are flagged by a "-" sign in the far right (first) digit thereby allowing full eight digit negative numbers. | |
| Negative square roots are not allowed give you "0.C" which is not recoverable. | |
| When memory store is in operation the far left (first) digit decimal point lights up |
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This box at 85mm x155mm x 30mm
is the tray plus slip-case type. Box has a sticker on the left hand
side with the serial number. It is printed in lime green and black. Made in Japan.
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A comprehensive, four language,
52pp two/one colour manual in a colour that does not match the box at all!
It measures 127mm x 82mm so struggles to even fit in the box.
Notice the use of the old name "Compet" in this booklet. Printed in Korea with reference number "2336". |
