Hewlett-Packard HP 31E (Spice/Spike GINGER)
The Hewlett-Packard HP 31E is a scientific calculator with 10 digits precision and RPN (reverse polish notation) logic. It has 30 keys, and an LED (light-emitting diode) display typical of calculators of this era. The power source is 2xAA NiCd pack.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Scientific |
| Keys | 30 |
| Precision | 10 |
| Logic | RPN |
| Display type | LED |
| Length | 130mm |
| Width | 70mm |
| Thickness | 30mm |
| Weight | 210g |
| Power Source | 2xAA NiCd pack |
| Year introduced | 1978 |
| Year discontinued | 1980 |
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.
Press STO then ENTER - if self-test is okay it will turn on all display elements
Replacements:
If you have a Hewlett-Packard HP 31E that is no longer working, you can first try replacing the 2xAA NiCd pack. 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: