Calcumatic 840
The Calcumatic 840 is an arithmetic calculator with algebraic logic. It has a VFD (vacuum fluorescent) display. The power source is 4xAA.
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Logic | Algebraic |
| Display type | VFD |
| Length | 159mm |
| Width | 83mm |
| Power Source | 4xAA |
| Year introduced | 1974 |
Replacements:
If you have a Calcumatic 840 that is no longer working, you can first try replacing the 4xAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent.
We suggest the following current models as possible replacements: