ES749 Flow Computer
51
Enter a Z-factor for the gas at operating conditions.
The Z-factor indicates how different a "real" gas behaves from an
"ideal gas" which exactly obeys the "general gas law" (P x V/T =
constant; Z=1). The further the real gas is from its condensation point,
the closer the Z-factor approaches "1".
Note:
• The Z-factor is used for all gas equations.
• Enter the Z-factor for the average process conditions
(pressure and temperature).
Input:
Number with xed decimal point: 0.1000...10.0000
Display: 1.000
FLOW. Z-FACTOR
Enter a Z-factor for the gas at reference conditions.
Note:
• The Z-factor is used for all gas equations.
• Dene the standard conditions in the submenu "STP
REFERENCE" (OTHER INPUT submenu group).
Input:
Number with xed decimal point: 0.1000...10.0000
Display: 1.000
REF. Z-FACTOR
Enter the isentropic exponent of the uid. The isentropic exponent
describes the behavior of the uid when measuring the ow with a
square law owmeter.
The isentropic exponent is a uid property dependent on operating
conditions.
Note:
Select one of the "SQR LAW" selections in "FLOWMETER
TYPE" of submenu group "FLOW INPUT" to activate this
function.
Input:
Number with xed decimal point: 0.1000...10.0000
Display: 1.4000
ISENTROPIC EXP.
FLUID DATA
6.7
FLUID DATA
(Continued)
FLOW. Z-FACTOR
REF. Z-FACTOR
ISENTROPIC EXP.
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