Endress+Hauser Proline Promass E 500 - Page 143

Proline Promass E 500 PROFIBUS PA Commissioning
Endress+Hauser 143
Density adjustment factor
→  143
Density adjustment offset
→  143
Parameter overview with brief description
Parameter Prerequisite Description Selection / User
entry / User
interface
Factory setting
Density adjustment mode – • 1 point adjustment
• 2 point adjustment
–
Density setpoint 1 – The entry depends on
the unit selected in
the Density unit
parameter (0555).
–
Density setpoint 2 In the Density adjustment
mode parameter, the 2 point
adjustment option is selected.
The entry depends on
the unit selected in
the Density unit
parameter (0555).
–
Execute density adjustment – • Cancel
*
• Busy
*
• Ok
*
• Density adjust
failure
*
• Measure density
1
*
• Measure density
2
*
• Calculate
*
• Restore original
*
–
Progress – Shows the progress of the
process.
0 to 100 % –
Density adjustment factor – Signed floating-point
number
–
Density adjustment offset – Signed floating-point
number
–
* Visibility depends on order options or device settings
Zero verification and zero adjustment
All measuring instruments are calibrated in accordance with state-of-the-art technology.
Calibration takes place under reference conditions →  273. Therefore, a zero adjustment
in the field is generally not required.
Experience shows that zero adjustment is advisable only in special cases:
• To achieve maximum measurement accuracy even with low flow rates.
• Under extreme process or operating conditions (e.g. very high process temperatures or
very high-viscosity fluids).
• For gas applications with low pressure
To achieve the highest possible measurement accuracy at low flow rates, the
installation must protect the sensor from mechanical stresses during operation.
To get a representative zero point, ensure that:
• any flow in the device is prevented during the adjustment
• the process conditions (e.g. pressure, temperature) are stable and representative