Fluid Components International CMB - Manual (Page 70)

13.6.9 Fixed density
If the operator selected the fixed option described in Section 13.6.1 Density measurement on/off (on page
67), density measurement will be switched off. The replacement value defined in the following selection
field will be displayed.
Press
↵ to display the following selection field:
Fixed density
0998.1 g/l
The current fixed density will be displayed. As mentioned in Section 12.4.3.2 Input window/modify a
value, the operator can change this value. The density unit can be defined for all settings and displays
described in Section 13.6.2 Density unit (on page 67).
13.6.10 Reference/process density display
When measuring density in a mass flowmeter, usually process density is displayed. Process density is
the density of the fluid at the measured temperature. Reference (or standard) density can also be dis-
played as an option. In this case the measured process density will be converted based on a reference
temperature. To do so, the reference temperature, the volume temperature coefficient of the fluid and the
pressure at reference density (for gases) must be known and have been programmed.
Volume measurement also depends on this setting. If “Process density” is set, the measured (actual)
volume flow will be displayed. If “Reference density” is set, a volume standardized to the reference den-
sity will be displayed.
Display of
[Process density]
The current operating mode for density measurement will be displayed. As mentioned in Section 12.4.3.1
Selection window/make a selection, the operator can toggle between the two modes.
13.6.11 Temperature coefficient
In order to calculate the reference density using the process density, the temperature coefficient of the
fluid density must be known. In order to improve the resolution and facilitate data entry, the unit of the
temperature coefficient is set to 10
-5 1/K.
Temp. coeffic.
00.00 E-5/K
The current value of 10
-5 1/K will be displayed. As mentioned in Section 12.4.3.2 Input window/modify a
value, the operator can change the density temperature coefficient of the fluid.
Page 70 of 106
CMB & CT OPERATING MANUAL