Endress+Hauser Proline Promass 83 - Page 69

Proline Promass 83 PROFIBUS DP/PA Commissioning
Endress+Hauser 69
!
Note!
Quick Setup automatically deactivates the function EMPTY PIPE DETECTION (6420) so that the
instrument can measure flow at low gas pressures.
Corrected volume measurement with gas:
Proceed as follows if the corrected volume flow (e.g. in Nm3/h) should be displayed and output
instead of the mass flow (e.g. in kg/h):
1. Select the “Commissioning” Quick Setup by means of the function matrix. → Page 59
2. Under “Pre-setting”, select the system unit “Corrected volume flow” and configure the
functions as follows:
3. Exit the “Commissioning” Quick Setup menu and return to the HOME position.
Quick Setup “Gas Measurement”
HOME position → F → MEASURED VARIABLE (A)
MEASURED VARIABLE → O → QUICK SETUP (B)
QUICK SETUP → N → QS GAS MEASUREMENT (1004)
Function No. Function name Setting to be selected ( P )
(to next function with F )
1004 QS GAS MEASUREMENT YES
After F is pressed by way of confirmation, the Quick Setup menu calls up
all the subsequent functions in succession.
▼
6400 ASSIGN LOW FLOW
CUTOFF
On account of the low mass flow involved when gas flows are measured,
it is advisable not to use a low flow cutoff.
Setting: OFF
6402 ON-VALUE LOW FLOW
CUT OFF
If the ASSIGNMENT LOW FLOW CUTOFF function was not set to
“OFF”, the following applies:
Setting: 0.0000 [unit]
User input: Flow rates for gas measurements are low, so the value for the
switch-on point (= low flow cutoff) must be correspondingly low.
6403 OFF-VALUE LOW FLOW
CUTOFF
If the ASSIGNMENT LOW FLOW CUTOFF function was not set to
“OFF”, the following applies:
Setting: 50%
User input: Enter the switch-off point as a positive hysteresis in %,
referenced to the switch-on point.
▼
Back to the HOME position:
→ Press and hold down Esc key X for longer than three seconds or
→ Repeatedly press and release Esc key X → Exit the function matrix step by step
Function No. Function name Setting to be selected ( P ) (to next function with F)
0404 UNIT CORRECTED
VOLUME FLOW
Select desired engineering unit
6460 CORR. VOL. CALC FIXED REFERENCE DENSITY
0421 UNIT REFERENCE
DENSITY
Select desired engineering unit
6461 FIXED REFERENCE
DENSITY
Enter the gas-dependent reference density (i.e. the density related to the
reference temperature and reference pressure)
Example for air:
Reference density = 1.2928 kg/Nm
3
(in relation to 0 °C and 1.013 bar)