FMC Technologies Proline Promass 83 E - Function Group EPD PARAMETER

Issue/Rev. 0.2 (12/12) MN0M023 • Page 125
Device Functions Proline Promass 83 9 Block BASIC FUNCTION
9.2.2 Function group EPD PARAMETER
BASIC FUNCTION G

HART GAA

PROCESS PARAMETER GIA

CONFIGURATION 640

EPD PARAMETER 642
Function description
BASIC FUNCTION o PROCESS PARAMETER o EPD PARAMETER
EMPTY PIPE DETECTION
(6420)
Use this function to activate the empty pipe detection (EPD). With empty measuring
tubes the density of the fluid falls below the value specified in the function EPD VALUE
LOW.
Options:
OFF
ON
Factory setting:
Liquid: ON
Gas: OFF
" Caution!
• Select a correspondingly low EPD response value in the function EPD VALUE LOW, so
that the difference to the effective density of the fluid is sufficiently large enough. This
ensures that totally empty measuring tubes and not partially filled ones are detected.
• For gas measurement we strongly recommend to switch off empty pipe detection.
EPD VALUE LOW
(6423)
! Note!
This function is not available unless the ON selection was selected in the EMPTY PIPE
DETECTION function.
Use this function to set a lower threshold for the measured density value, in order to
detect possible problems in the process indicated by too low density.
User input:
5-digit floating-point number
Factory setting:
0.2000 kg/l
EPD VALUE HIGH
(6424)
! Note!
This function is not available unless the ON selection was selected in the EMPTY PIPE
DETECTION function.
Use this function to set an upper threshold for the measured density value.
User input:
5-digit floating-point number
Factory setting:
6.0000 kg/l
EPD RESPONSE TIME
(6425)
Use this function to enter the time span for which the criteria for an empty pipe have to
be satisfied without interruption before a notice message or fault message is generated.
User input:
fixed-point number: 1.0...100 s
Factory setting:
1.0 s