KROHNE Summit 8800 Vol 2 - Manual (Page 104)

104 www.krohne.com 08/2013 - MA SUMMIT 8800 Vol2 R02 en
SUMMIT 8800 STREAM CONFIGURATION 06
Figure 97 Stream Liquid, gas and steam line density selection
Keypad The default value as used in the selection. This value may be changed by an operator.
The keypad value is for line density, for liquids also for the temperature and density.
Limits The alarm limits (max and min) and warning limits (hi and lo) for the line density.
6 .8 .1 Ratio of specific heats (liquid and gas)
Figure 98 Stream ratio of specific heats
Optionally, the ratio of specific heat can be given as a keypad value or calculated using Method 1.
In the following parameters must be specified:
Yv Ratio of specific heat reference value
K18, K19, K20 Ratio of specific heat constants
Under the viscosity tab the source of viscosity is entered as either keypad or IAPWS IF97 togeth-
er with the actual keypad value if required.
6 .8 .2 Viscosity (steam):
Three options are available for viscosity:
Keypad The user defined value for this range will be choosen as given.
IAPWS IF97 The viscosity will be calculated to IAPWS IF97
Estimation Estimation based on temperature and constants to be entered
Viscosity= Visc1+ Visc2*t + Visc3* t2