Commissioning
Cerabar PMP71B HART
44
Hauser
Example: Outputting of the pressure value at the current output
Pressure and temperature units are converted automatically. Other units are not
converted.
In the following example, the pressure value should be measured in a tank and output on
the current output. The maximum pressure of 450 mbar (6.75 psi) corresponds to the 20
mA current. The 4 mA current corresponds to a pressure of 50 mbar (0.75 psi).
Prerequisites:
• Measured variable in direct proportion to the pressure
• Due to the orientation of the measuring device, there may be pressure shifts in the
measured value (when the vessel is empty or partly filled, the measured value is not
zero)
Perform a position adjustment if necessary
• In the
Assign PV
parameter, the
Pressure
option must be set (factory setting)
Display: In the
Guidance
menu
Commissioning
wizard, keep pressing the key until
the
Assign PV
parameter is reached. Confirm with the key, select the
Pressure
option
and press the key to confirm.
B
450 mbar
20 mA
A
50 mbar
4 mA
I
[mA]
20
4
50
p
[mbar]
450
A0039009
A
Lower range value output
B
Upper range value output
Adjustment:
1. Enter the pressure value for the 4 mA current via the
Lower range value output
parameter (50 mbar (0.75 psi)).
2. Enter the pressure value for the 20 mA current via the
Upper range value output
parameter (450 mbar (6.75 psi))
Result: The measuring range is set to 4 to 20 mA.
9.7.3
Commissioning without the commissioning wizard
Example: Commissioning a volume measurement in the tank
Pressure and temperature units are converted automatically. Other units are not
converted.
In the following example, the volume in a tank should be measured in liters. The
maximum volume of 1
000 l (264 gal) corresponds to a pressure of 450 mbar (6.75 psi).
The minimum volume of 0 liters corresponds to a pressure of 50 mbar (0.75 psi).
Summary of Contents for Hart Cerabar PMP71B
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