Prinztronic SR88M type II

Made in Japan.1975.

Size (approx):  88mm (max) x 135mm x 25mm (max)  (w,h,d)
Weight 152g excluding batteries
Power:
4.8 to 6V DC, 4 x AA size battery, 0.5W.  Also accepts adapter/charger DC 6V, 100mA  through top side socket on the right.  The battery compartment cover has a small table showing when an adapter/charger can be used; Ni-Cd and no batteries is OK, but manganese and alkaline is not.  Quoted battery life for manganese or Ni-Cd is 3 hours.
Case: Solid thick beige plastic case with brown lower section.  Stippled brown plastic keyboard surround with a small piece of brushed aluminium around the top three keys and on/off button.  Green display filter has the name and number printed in white.
Display: 8 digit green VFD (ninth digit used for signs and memory indicator)

Logic comments:
The (C) button is used once to clear entry of a number, a second time to clear the calculator
Overflow on number input is suppressed
Error is flagged by "C" (or "E" for negative, except root errors) in the left hand ninth digit with the first eight digits of the answer.  Error is not recoverable.
Storing in the memory using the (M=) keys causes the night digit decimal point to light up.  To cancel the memory press (RM) twice.
There is automatic constant on multiplication and division only
Sign change can be used in mid-number entry.
Negative numbers are flagged by a "-" sign in the far left ninth digit, allowing full eight digit negative numbers.

Our serial number is 517088 and was kindly donated by Graham Denton

Manufacturer: Prinztronic
Date: 1975

This exhibit has a reference ID of CH4884. Please quote this reference ID in any communication with the Centre for Computing History.

Click on the Image(s) For Detail