HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 157

In the second page of this menu (press L) we find the following items: In this menu page, there is one function (TINC) and a number of units described in an earlier section on units (see above). The function of interest is: TINC: temperature increment command Out of all the functions available in this MENU (UTILITY menu), namely, ZFACTOR, FANNING, DARCY, F0λ, SIDENS, TDELTA, and TINC, functions FANNING and DARCY are described in Chapter 6 in the context of solving equations for pipeline flow. The remaining functions are described following. Function ZFACTOR Function ZFACTOR calculates the gas compressibility correction factor for nonideal behavior of hydrocarbon gas. The function is called by using ZFACTOR(xT, yP), where xT is the reduced temperature, i.e., the ratio of actual temperature to pseudo-critical temperature, and yP is the reduced pressure, i.e., the ratio of the actual pressure to the pseudo-critical pressure. The value of xT must be between 1.05 and 3.0, while the value of yP must be between 0 and 30. Example, in ALG mode: Function F0λ Function F0λ (T, λ) calculates the fraction (dimensionless) of total black-body emissive power at temperature T between wavelengths 0 and λ. If no units are attached to T and λ, it is implied that T is in K and λ in m. Example, in ALG mode: Page 3-32