Commissioning
Deltabar PMD75B HART
44
Hauser
Prerequisites:
• Measured variable with square root extraction in relation to pressure
• In the
Output current transfer function
parameter, set the
Square
option.
Menu path: Application → Sensor → Sensor configuration → Output current transfer
function
• Enter the switch-on point for low flow cut off in the
Low cutoff
parameter (default 5 %)
Menu path: Application → Sensor → Sensor configuration → Low cutoff
6%
5%
0%
0%
Q
Qmax
Q
Qmax
∆
∆
p
p
A0025191
• The hysteresis between the switch-on point and the switch-off point is always 1 % of the
maximum flow value
• If a switch-on point of 0 % is entered, low flow cut off is deactivated
In the
Assign PV
parameter, the
Pressure
option must be set (factory setting)
Menu path: Application → Scaled Variable → Assign PV
The set unit is also output on the fieldbus.
9.7.6
Cleaning the pressure piping
Differential pressure measurement
Before the device is adjusted, the pressure piping must be cleaned, where necessary, and
filled with fluid.