Endress+Hauser Proline Promass 83, Руководство по эксплуатации

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6 Commissioning Proline Promass 83 FOUNDATION Fieldbus
56 Hauser
11. In the “Reference Param. - Fixed Reference Density” parameter, enter a value for the gas-
dependent reference density (= density at reference temperature and reference pressure).
Example for air: reference density = 1.2928 kg/Nm
3
(at 0 °C and 1.013 bar)
!
Note!
Corrected volume flow can also be forwarded to other function blocks and higher-order pro-
cess-control systems as a process variable. Please also observe the corresponding settings in the
Analog Input Function Block ( see the “Description of Device Functions” Manual).
12. Close the configuration program.
Function setting for gas measurement (using the local display
k
)
Certain functions have to be configured accordingly in the function matrix before a gas can be mea-
sured. The procedure is as follows:
Function setting for gas measurement
k
HOME
→
F
→
R
→
BASIC FUNCTIONS
BASIC FUNCTIONS
→
F
→
PROCESSPARAMETER
PROCESSPARAMETER
→
F
→
CONFIGURATION
→
O
→
EPD PARAMETER
→
F
→
EMPTY PIPE DETEC-
TION
Function No. Function Setting to select (
P
/ store with
F
)
6420 EMPTY PIPE DETECTION Empty pipe detection has to be disabled so that measurement
can be performed even at low gas pressures.
Option: OFF
Press
F
to return to EPD PARAMETER
EPD PARAMETER
→
S
→
CONFIGURATION
→
F
→
ASSIGN LOW-FLOW CUTOFF
6400 ASSIGN
LOW FLOW CUTOFF On account of the low mass flow involved when gas flows
are measured, it is advisable not use a low flow cutoff.
Recommended setting: OFF (default)
OFF
→
F
→
back to CONFIGURATION.
Not “OFF”
→
F
→
proceed to next function.
6402 SWITCH-ON POINT
LOW FLOW CUTOFF If the ASSIGNMENT LOW FLOW CUTOFF function was not
set to “OFF”, the following applies:
Recommended setting: 0.0000 [unit]
Flow rates for gas measurements are low, so the value for the
switch-on point (= low flow cutoff) must be correspondingly
low.
Press
F
to proceed to the next function.
6403 OFF-VALUE
LOW FLOW CUTOFF If the ASSIGNMENT LOW FLOW CUTOFF function was not
set to “OFF”, the following applies:
Enter the switch-off point as a positive hysteresis in %, refe-
renced to the switch-on point.
Recommended setting: 50%
Back to the HOME position:
→
Press and hold down Esc key (
X
) for longer than three seconds.
→
Repeatedly press and release Esc key (
X
)
→
exit the function matrix step by step