FMC Corporation - Talstar 80 Manuel D’Utilisation

Commissioning

Proline Promass 80 PROFIBUS PA

64

Accuracy when determining the density has a direct effect on volume flow calculation. Density 
adjustment is thus necessary under the following conditions:

• The sensor does not measure exactly the density value that the user expects on the basis of 

laboratory analyses.

• The fluid properties are outside the measuring points set at the factory, or the reference operating 

conditions used to calibrate the measuring device.

• The system is used exclusively to measure a fluid’s density which must be registered to a high 

degree of accuracy under constant conditions.

"

Caution! 
• Onsite density adjustment can be performed only if the user has detailed knowledge of the fluid 

density, obtained for example from detailed laboratory analyses.

• The target density value specified in this way must not deviate from the measured fluid density 

by more than ±10%.

• An error in defining the target density affects all calculated density and volume functions.
• Density adjustment changes the factory density calibration values or the calibration values set by 

the service technician.

• The functions outlined in the following instructions are described in detail in the "Description of 

Device Functions" manual.

1.

Fill the sensor with fluid. Make sure that the measuring tubes are completely filled and that 
liquids are free of gas bubbles.

2.

Wait until the temperature difference between fluid and measuring tube has equalized. The 
time you have to wait for equalization depends on the fluid and the temperature level.

3.

Select the density adjustment function:
HOME 

→ F → R → PROCESS PARAMETERS → F → DENSITY SET POINT

– When you press 

P you are automatically prompted to enter the access code if the function 

matrix is still disabled. Enter the code.

– Now  use 

P to enter the target density of your fluid and press F to save this value (input 

range = actual density value ±10%).

4.

Press 

F to select the "MEASURE FLUID" function.

With 

P, select the "START" setting and press F. The message "DENSITY ADJUST RUNNING" 

then appears on the display for approx. 10 seconds. During this time Promass measures the 
current density of the fluid (actual density value).

5.

Press 

F to select the "DENSITY ADJUST" function.

With 

P, now select the "DENSITY ADJUST" setting and press F. Promass now compares the 

target and actual density values and uses this information to calculate the new density 
coefficients.

"

Caution! 

If the density adjustment does not complete correctly, you can select the RESTORE ORIGINAL 
function to reactivate the default density coefficients.

6.

Back to HOME position with 

Q (press P simultaneously).