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HP 20B User Manual

HP 20B
75 pages
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Basic Features
15
In this manual, diagrams called
Menu Maps
are included at the beginning of each section to assist you with navigating
through the menus used for that section. For an example of a menu map, see Figure 7.
Figure 7 The Menu Map for the Break-even Menu
There are four types of menu items:
1. Read/write. Read/write menu items, such as
Fixed
in the Break-even menu shown above, are easily recognizable,
because when they are selected, both the
INPUT
and small (=) annunciators are lit. When lit, these annunciators
indicate that entering a number and pressing I will store the entered number in the displayed menu item.
Pressing = (outside of a mathematical operation) calculates the value for that item based on available data.
2. Read-only. Read-only items such as Internal Rate of Return (
IRR%
) in the IRR menu are display-only; they are
calculated values computed internally by the calculator.
3. Write-only. Write-only items, such as investment interest rate (
Inv. I%
) in the Net Present Value (NPV) menu, are
similar to read/write items in that the
INPUT
annunciator is lit when these items are selected, indicating that entering a
number and pressing I stores that number in that menu item. However, the = key does not calculate a
value for that item.
4. Special items. Special items, such as the
Degree/Radian
option in the Mode menu, the items of the Reset menu, and
the items of the Percent Calculation (%calc ) menu perform an action when I is pressed. Depending on the
menu, this action can be the selection of a sub-menu (%calc menu), changing a mode or setting (Mode menu), or
erasing data (Reset menu).

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HP 20B Specifications

General IconGeneral
TypeFinancial
Cover-
Form factorPocket
Control typeButtons
Product colorBlack
Digits12 digits
Display typeLCD
Display tiltingNo
Display number of lines2 lines
Battery typeCR2032
Power sourceBattery
Auto power offYes
Number of batteries supported2
Memory registers110
Weight and Dimensions IconWeight and Dimensions
Depth149.2 mm
Width77 mm
Height16 mm
Weight37.5 g

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