HP 48SX Scientific Expandable Calculator User Manual - Volume II

1. Introduction to the HP 48SX

This document serves as Volume II of the comprehensive user manual for the HP 48SX Scientific Expandable Calculator. It is designed to guide users through the advanced functionalities, programming capabilities, and intricate operations of this powerful scientific instrument. Familiarity with basic calculator operations, as covered in Volume I, is recommended for optimal use of this manual.

The HP 48SX is renowned for its Reverse Polish Notation (RPN) entry system, extensive graphing capabilities, and expandability via memory cards. This volume delves deeper into these features, enabling users to unlock the full potential of their calculator for complex scientific, engineering, and mathematical tasks.

Figure 1: The HP 48SX Scientific Expandable Calculator. This image displays the calculator's physical layout, including its keypad, display, and expansion slots.

2. Einrichtung und Erstkonfiguration

2.1 Einlegen der Batterie

The HP 48SX operates on three AAA batteries. Proper installation is crucial for functionality.

1. Suchen Sie die Abdeckung des Batteriefachs auf der Rückseite des Taschenrechners.
2. Schieben Sie die Abdeckung in Pfeilrichtung ab.
3. Insert three fresh AAA batteries, ensuring correct polarity (+/-) as marked inside the compartment.
4. Bringen Sie die Abdeckung des Batteriefachs wieder an und achten Sie darauf, dass sie hörbar einrastet.

2.2 Initial Power-On and Display Adjustment

Nach dem Einlegen der Batterie drücken Sie die ON key to power on the calculator. The display contrast can be adjusted for optimal viewing.

• To increase contrast: Press and hold the ON und drücken Sie dann die + Schlüssel.
• To decrease contrast: Press and hold the ON und drücken Sie dann die - Schlüssel.

2.3 Installation der Speicherkarte (optional)

The HP 48SX features two expansion slots for memory cards, allowing for increased storage and specialized applications.

1. Stellen Sie sicher, dass der Taschenrechner ausgeschaltet ist.
2. Locate the expansion slots on the top edge of the calculator.
3. Carefully insert the memory card into an available slot, ensuring the correct orientation. Do not force the card.
4. Press firmly until the card is seated securely.
5. Power on the calculator. The system should detect the new memory card.

3. Operating the HP 48SX: Advanced Functions

This section covers advanced operations, building upon the basic functions detailed in Volume I.

3.1 Understanding the RPN Stack

The HP 48SX utilizes Reverse Polish Notation (RPN), where operands are entered before the operator. The stack is a fundamental concept in RPN, holding intermediate results.

• Zahlen eingeben: Type the number, then press EINGEBEN. This pushes the number onto the stack.
• Durchführung von Operationen: Enter the operands, then press the desired operator key (e.g., +, -, *, /). The operation is performed on the top two stack levels, and the result replaces them.
• Stack Manipulation: Keys like FALLEN, TAUSCHEN, ROLLEN, Und DUP are used to manage stack contents.

3.2 Advanced Mathematical Functions

Access advanced functions via the SCHICHT keys (left-shift LS and right-shift RS) and menus.

• Trigonometrische Funktionen: SÜNDE, COS, BRÄUNEN and their inverses are directly accessible or via shifted keys. Ensure the correct angle mode (degrees, radians, grads) is selected using the MODI Speisekarte.
• Logarithmische Funktionen: LN (natural logarithm) and PROTOKOLL (base 10 logarithm) are available.
• Komplexe Zahlen: The HP 48SX supports complex number arithmetic. Enter complex numbers as (real, imaginary).
• Matrixoperationen: Create and manipulate matrices using the MATRIX menu. Operations include addition, subtraction, multiplication, inversion, and determinants.

3.3 Graphische Darstellung von Funktionen

The calculator can plot various types of graphs.

1. Drücken HANDLUNG to access the plotting menu.
2. Select the desired plot type (e.g., FUNKTION, PARAMETRISCH, POLAR, KONISCH).
3. Enter the function(s) to be plotted.
4. Passen Sie die viewing window (X-RANGE, Y-RANGE) as needed.
5. Drücken ZIEHEN , um das Diagramm anzuzeigen.

3.4 Programming with RPL

The HP 48SX uses RPL (Reverse Polish Lisp) for programming. Programs are stored as objects.

1. To create a new program, enter << (left-shift ALPHA [) followed by the program commands, and then >> (right-shift ALPHA ]).
2. Store the program by typing its name (e.g., 'MYPROG') and pressing STO.
3. To execute a program, type its name and press BEWERTUNG, or press the corresponding softkey if assigned.
4. Common programming constructs include IF...THEN...ELSE...END, FOR...NEXT, Und DO...UNTIL...END.

4. Wartung und Pflege

4.1 Den Taschenrechner reinigen

To ensure longevity and proper function, keep your HP 48SX clean.

• Mit einem weichen, fusselfreien Tuch leichtampMit Wasser oder einem milden, nicht scheuernden Reinigungsmittel abspülen.
• Avoid harsh chemicals, solvents, or abrasive materials, as these can damage the display or casing.
• Do not spray cleaning solutions directly onto the calculator.

4.2 Batteriewechsel

Replace batteries promptly when the low battery indicator appears on the display to prevent data loss.

• Befolgen Sie die in Abschnitt 2.1 beschriebenen Schritte zur Installation der Batterie.
• It is recommended to replace all three AAA batteries simultaneously.
• Entsorgen Sie alte Batterien entsprechend den örtlichen Vorschriften.

4.3 Speicherung

When not in use for extended periods, store the calculator in a cool, dry place, away from direct sunlight and extreme temperatures. Consider removing batteries if storing for several months to prevent leakage.

5. Fehlerbehebung bei häufigen Problemen

This section addresses common problems and their solutions.

5.1 Der Taschenrechner lässt sich nicht einschalten

• Batterien prüfen: Stellen Sie sicher, dass die Batterien korrekt eingesetzt und nicht entladen sind. Tauschen Sie sie gegebenenfalls aus.
• Batteriekontakte: Verify that battery contacts are clean and free of corrosion.
• Kaltstart: If the calculator is unresponsive, perform a hard reset by removing all batteries for a few minutes, then reinserting them. Note that this may clear user data.

5.2 Anzeigeprobleme

• Kontrast anpassen: Verwenden Sie die EIN + Und ON - key combinations to adjust display contrast (refer to Section 2.2).
• Schwache Anzeige: Dies deutet häufig auf einen niedrigen Batteriestand hin. Tauschen Sie die Batterien aus.
• Garbled Display: A hard reset (see 5.1) may resolve temporary display glitches.

5.3 Falsche Berechnungsergebnisse

• Winkelmodus: For trigonometric functions, ensure the calculator is in the correct angle mode (degrees, radians, or grads). Check the MODI Speisekarte.
• RPN Stack: Verify the order of operations and contents of the RPN stack. Incorrect stack manipulation is a common source of errors.
• Einheit: Confirm that units are consistent for physical calculations.
• Programmfehler: If using a program, review the program code for logical or syntax errors.

6. Spezifikationen

The following specifications pertain to the HP 48SX Scientific Expandable Calculator.

Hinweis: Technische Daten können ohne vorherige Ankündigung geändert werden.