Endress+Hauser Proline Promass 84 MODBUS RS485 Operating Instructions Manual page 60

Commissioning
!
60
Recommended Settings
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
1004 QS GAS MEASUREMENT
6400 ASSIGN LOW FLOW CUTOFF
6402 ON-VALUE LOW FLOW CUT OFF
6403 OFF-VALUE LOW FLOW CUTOFF
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
Note!
Quick Setup automatically deactivates the function EMPTY PIPE DETECTION (6420) so that the
instrument can measure flow at low gas pressures.
Proline Promass 84 MODBUS RS485
Setting to be selected ( P )
(to next function with F )
YES
After F is pressed by way of confirmation, the Quick
Setup menu calls up all the subsequent functions in
succession.
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On account of the low mass flow involved when gas
flows are measured, it is advisable not use a low flow
cutoff.
Setting: 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.
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.
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Endress+Hauser