Siemens SITRANS FUH1010PVDX, Руководство по эксплуатации, Страница: 108 / 308

5-6
CQO:1010PVXFM-3 Section 5
To Save or Rename a Site Setup:
Type the site name with the PC keyboard or use the Magnetic Wand and press the
sensor to access the first character position.
To select a character press then to highlight to next character position.
To select the second character press . Repeat this process to select all the characters
(8 max.).
To save the site data present in Active Memory press .
5.2 THE PIPE DATA MENU
This menu becomes available after picking a Meter Type, Measurement Channel and Measurement
Technology. We recommend that you edit the Pipe Data immediately after creating a new Site Setup.
The Pipe Data menu allows you to define the application’s pipe parameters. Select a pipe from one of the
meter’s stored pipe tables (see menu structure below); or input the pipe size and description manually.
Manual entries include Pipe Material, Outer Diameter (OD) and pipe Wall Thickness. Liner Material and
Liner Thickness entries are included to support pipes with liners. The meter requires the pipe outer
diameter (OD) and wall thickness to operate. You must define these parameters to complete the instal-
lation.
The pipe table includes descriptions for over sixty standard pipes plus any user-entered pipes (see Meter
Facilities). To use these presets, first pick a Pipe Class (e.g., ASA Stainless Steel), then pick a pipe size
within that class (e.g., 4SS10). When you select a particular pipe class/size, the relevant pipe param-
eters appear in the [Pipe Data] menu cells. If a given pipe class/size does not match your application
exactly you can still edit each individual parameter to fine-tune your selection. In addition, the Meter
Facilities section of the Installation Menu provides a pipe table editor that allows you to customize any or
all of the stored pipe tables.
NOTE: If you edit the pipe parameters after the system is operating, you will have to repeat the
transducer install procedure.
ENT
This FUH1010 operating system includes routines that will compensate the measured raw flow rate for
dynamic changes in the pipe dimensions, caused by variations in line temperature and pressure sup-
plied to the flow meter. To account for variations in pipe material, two data entry items (Thermal Expan-
sion Coefficient and Modulus of Elasticity) are provided in the Pipe Data menu screen (see sample menu
screen on next page).
The equation used to automatically compute the change in pipe inside diameter is:
d
1
= d
0
(1 +
α
(T
1
−
T
0
))
⋅
⎝
⎛
⎠
⎞
1
+
d
0
(P
1
−
P
0
)
E w
Where:
d
0
= inside diameter of pipe at STP
d
1
= inside diameter of pipe after temperature and pressure change.
w = pipe wall thickness
T
0
and P
0
= Standard temperature and Pressure
T
1
and P
1
= Operating temperature and Pressure
α
= Coefficient of Thermal Expansion of Pipe material
E = Modulus of Elasticity of pipe material