GE Optica - Page 64

Programming the VGA Optica 4-5
January 2006
User Equations (cont.)
The equation 2 × Tdew °F + (%RH / Twet°C) would be entered as
2 × A1 + (A2 / A3)
Table 4-2: User Equation Parameters
Identifier Units Identifier Units
Humidity Units: Temperature Units:
A0 Tdew °C A17 Tmp °C
A1 Tdew °F A18 Tmp °F
A2 %RH A19 Tmp °K
A3 Twet °C A20 Tmp °R
A4 Twet °F Pressure Units:
A5 ppmv A21 PSIA
A6 ppmw A22 mbar
A7 grains/lb A23 bar
A8 grains/scf A24 Pa
A9 g/kg A25 kPa
A10 g/m3 A26 mmHg
A11 lb/mft3 A27 inHg
A12 kj/kg(0) A28 kg/cm2
A13 kj/kg(32) A29 Dynes/cm2
A14 BTU/lb(0) A31 User Equation 1
A15 BTU/lb(32) A32 User Equation 2
A16 pw(mbar) A33 User Equation 3