Endress+Hauser Cerabar PMP51B, Operating Instructions Manual

Page: 33 / 60

Cerabar PMP51B Analog Commissioning
Hauser 33
8.3.2 Linearization
In the following example, the volume in a tank with a conical outlet should be measured in
m 3 .
Prerequisites:
• Points for linearization table are known
• Level calibration is performed
• Linearization characteristic must continually increase or decrease
h
[m]
0
0 3.0
3.5
V
[m
3
]
V
[m ]
3
20
4
0 3.5
I
[mA]
A0038910
1. In the Assign PV parameter, the Scaled variable option must be configured
 Menu path: Application → HART output → HART output → Assign PV
2. In the Scaled variable unit parameter, set the desired unit
 Menu path: Application → Sensor → Scaled variable → Scaled variable unit
3. The linearization table can be opened via the Go to linearization table parameter
Table option.
 Menu path: Application → Sensor → Scaled variable → Scaled variable transfer
function
4. Enter the desired table values.
5. The table is activated once all the points in the table have been entered.
Result:
The measured value after linearization is displayed.
• Error message F435 "Linearization" and the alarm current appear as long as the
table is being entered and until the table is activated
• The 0% value (= 4 mA) is defined by the smallest point in the table
The 100% value (= 20 mA) is defined by the largest point in the table
• The assignment of the volume/mass values to the current values can be changed
with the Lower range value output parameter and Upper range value output
parameter
8.4 Protecting settings from unauthorized access
8.4.1 Hardware locking or unlocking
DIP switch 1 on the electronic insert is used to lock or unlock operation.
If operation is locked via the DIP switch, the key symbol  appears on the local display.