
9.2.4.3
Volume and mass flow measurements
The following characteristic curves are available for volume and mass flow measurements:
● Hold at 0, square root (VSOFF, for volume or MSOFF, for mass flow)
The loop current is 4 mA up to the application point (low flow cut-off (Page 128)). Starting
from the application point, scaling occurs according to the square root:
$SSOLFDWLRQSRLQW
6H
WWL
QJ
UD
QJ
H
IR
UD
SS
OLF
DW
LR
Q
SR
LQ
W
EDU
;
Y
Loop current or flow
X
Set measuring span
● Linear, square root (VSLN, for volume or MSLN, formass flow)
The loop current has a linear relationship with the differential pressure up to the application
point (Page 115). Starting from the application point, scaling occurs according to the square
root:
$SSOLFDWLRQSRLQW
OLQHDU
6H
WWL
QJ
UD
QJ
H
IR
UD
SS
OLF
DW
LR
Q
SR
LQ
W
EDU
;
Y
Loop current or flow
X
Set measuring span
Parameter assignment
9.2 Parameter assignment over device with display
SITRANS P320/P420 (mA/HART)
Operating Instructions, 06/2018, A5E44852162-AA
111
Содержание SITRANS P320
Страница 10: ...Table of contents SITRANS P320 P420 mA HART 10 Operating Instructions 06 2018 A5E44852162 AA ...
Страница 18: ...Introduction 2 7 Notes on warranty SITRANS P320 P420 mA HART 18 Operating Instructions 06 2018 A5E44852162 AA ...
Страница 174: ...Functional Safety 10 7 Repair and service SITRANS P320 P420 mA HART 174 Operating Instructions 06 2018 A5E44852162 AA ...
Страница 260: ...Index SITRANS P320 P420 mA HART 260 Operating Instructions 06 2018 A5E44852162 AA ...