Citizen 831RD
The Citizen 831RD is an arithmetic calculator with 8 digits precision and algebraic logic. It has 10 functions, 28 keys, and a VFD (vacuum fluorescent) display. The power source is 2xAA batteries. Note: External battery pack
Facts at a glance:
| Feature | Value |
|---|---|
| Type | Arithmetic |
| Functions | 10 |
| Keys | 28 |
| Precision | 8 |
| Logic | Algebraic |
| Display type | VFD |
| Length | 165mm |
| Width | 86mm |
| Thickness | 22mm |
| Weight | 204g |
| Power Source | 2xAA batteries |
| Year introduced | 1977 |
| Year discontinued | 1978 |
Replacements:
If you have a Citizen 831RD that is no longer working, you can first try replacing the 2xAA 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: