Key facts
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CASIO D-20TER/DF-120TER/JF-120TER/ MS-88TER/MS-100TER/MS-120TER/ SL-310TER/SL-320TER Manual
This guide explains how to operate Casio's D‑20TER, DF‑120TER, JF‑120TER, MS‑100TER, MS‑120TER, SL‑310TER and SL‑320TER calculators. It covers the selector functions, display indicators, error handling, and steps for correcting input mistakes.
Key features include a two‑way power system (solar cell plus a button‑type battery), automatic power‑off after six minutes of inactivity, and various rounding and decimal‑place selectors that let you control how numbers are displayed and calculated.
Casio JF-120TE specifications
| Power supply (D‑20TER/DF‑120TER/JF‑120TER) | Two‑Way Power System, solar cell + LR44 battery |
|---|---|
| Power supply (MS‑100TER/MS‑120TER/SL‑310TER/SL‑320TER) | Two‑Way Power System, solar cell + LR54 (LR1130) battery |
| Battery life | Approximately 3 years (1 hour operation per day) |
| Dimensions (D‑20TER) | 32 mm (H) × 151 mm (W) × 158 mm (D) |
| Dimensions (DF‑120TER) | 36 mm (H) × 126 mm (W) × 175 mm (D) |
| Dimensions (JF‑120TER) | 29.3 mm (H) × 107 mm (W) × 175.5 mm (D) |
| Dimensions (MS‑100TER / MS‑120TER) | 30.7 mm (H) × 103 mm (W) × 145 mm (D) |
| Dimensions (SL‑310TER / SL‑320TER) | 7.5 mm (H) × 70 mm (W) × 118.5 mm (D) |
Source: CASIO D-20TER/DF-120TER/JF-120TER/ MS-88TER/MS-100TER/MS-120TER/ SL-310TER/SL-320TER Manual
All Casio JF-120TE documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How do I set the tax rate on the JF-120TE?
Hold down the tax key for about two seconds and use the SET TAX RATE function to enter the desired percentage.
How can I switch to currency conversion mode?
Press the (W/EX) key; each press toggles between Memory Mode and Conversion Mode.
How is the calculator powered when the solar cell cannot provide enough light?
The calculator uses a two‑way power system that supplements the solar cell with a button‑type battery (LR44 or LR54).
From: CASIO D-20TER/DF-120TER/JF-120TER/ MS-88TER/MS-100TER/MS-120TER/ SL-310TER/SL-320TER Manual
Can I replace the battery myself?
No. Battery replacement must be performed by an authorized Casio dealer or service centre.
From: CASIO D-20TER/DF-120TER/JF-120TER/ MS-88TER/MS-100TER/MS-120TER/ SL-310TER/SL-320TER Manual