HP 50g Calculator - Converting to Base Units

To convert any of the units to the units of the SI system, use the function ‘UBASE’. For example, to find out the value of 1 poise (unit of viscosity) in SI units, use the following:

Set the system flag 117 to CHOOSE boxes. To perform the conversion in ALG mode:

Key
Description
Selects the ‘UNITS’ menu
Selects the ‘TOOLS’ menu
Selects the ‘UBASE’ function
Enters 1 and underline
Selects the ‘UNITS’ menu
Selects the ‘VISCOSITY’ option
Selects 'P' (poise)
Converts the units

The result is the following screen (i.e., 1 poise = 0.1 kg/(m⋅s)):

Figure 1: Displaying the results

In RPN mode, with system flag 117 set to CHOOSE boxes:

Key
Description
Enter 1 (no underline)
Selects the ‘UNITS’ menu
Selects the ‘VISCOSITY’ option
Selects 'P' (poise)
Selects the ‘UNITS’ menu
Selects the ‘TOOLS’ menu
Selects the ‘UBASE’ function

The conversion can also be performed by using the menu keys instead of CHOOSE boxes. In ALG mode, system flag 117 set to SOFT menus, then press:

Key
Description
Selects the ‘UNITS’ menu
Selects the ‘TOOLS’ menu
Select the ‘UBASE’ function
Enters 1 and underline
Selects the ‘UNITS’ menu
Selects the ‘VISCOSITY’ option
Selects the unit 'P' (poise)
Converts the units

In RPN mode, with system flag 117 set to SOFT menus, press:

Key
Description
Enters 1 (no underline)
Selects the ‘UNITS’ menu
Selects the ‘VISCOSITY’ option
Selects the unit 'P' (poise)
Selects the ‘UNITS’ menu
Selects the ‘TOOLS’ menu
Selects the ‘UBASE’ function