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Hewlett-Packard HP 27S (Pioneer MENTOR)

Hewlett-Packard HP 27S
Image: Wikimedia CC BY-SA 3.0

The Hewlett-Packard HP 27S is a scientific calculator with 10 digits precision and algebraic logic. It has 250 functions, 37 keys, and an LCD (liquid crystal) display. The power source is 3x1.5V cell. Note: Extremely powerful formula programming and solve functions.

Facts at a glance:

FeatureValue
TypeScientific
Functions250
Keys37
Precision10
LogicAlgebraic
Display typeLCD
Display size131
PrinterIR ext
Length148mm
Width80mm
Thickness15mm
Weight120g
Power Source3x1.5V cell
Year introduced1988
Year discontinued1991

Diagnostics

Note that diagnostic tests generally delete any data on the calculator. Be sure to back up any important information held in the calculator before running these tests.

Hold down ON button and press fourth key on top row of keypad, then choose test from menu (use EXIT to leave test and go back to menu). Use ON and fifth key on top row to run a test sequence. Use ON key and third key on top row to reset calculator after tests.

Replacements:

If you have a Hewlett-Packard HP 27S that is no longer working, you can first try replacing the 3x1.5V cell batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current model as a replacement:

See other calculators by Hewlett-Packard