FMC Technologies Proline Promass 83 E - Function Description

Issue/Rev. 0.2 (12/12) MN0M023 • Page 131
Device Functions Proline Promass 83 9 Block BASIC FUNCTION
DENSITY ADJUST
(6487)
With this function a density adjustment can be carried out on site.
The density adjustment values will thus be recalculated and stored. This ensures that the
values dependent on density calculations (e.g. volume flow) are as accurate as possible.
! Note!
Before carrying this out, please refer to the Operating Instructions Proline Promass 83,
BA 059D/06/en for a detailed description of the procedure for density adjustment.
Two types of adjustment are possible:
1-point density adjustment (with one fluid)
This type of density adjustment is necessary under the following conditions:
• The sensor does not accurately measure the density which the operator expects based
on laboratory trials.
• The characteristics of the fluid are outside the measuring points set at the factory or
reference conditions under which the flowmeter has been calibrated.
• The plant is used solely for measuring a fluid whose density is to be determined very
accurately under constant conditions.
2-point density adjustment (with two fluids)
This type of adjustment must always be carried out when the measuring tubes are
changed mechanically, e.g. due to:
• Deposits
• Abrasion
• Corrosion
In such instances, the measuring tube resonance frequency is influenced in such a way
that it is no longer compatible with the calibration data determined at the factory.
The 2-point density adjustment takes these mechanically-based changes into account and
calculates new, adjusted calibration data.
Options:
CANCEL
MEASURE FLUID 1
MEASURE FLUID 2
DENSITY ADJUSTMENT
Factory setting:
CANCEL
RESTORE ORIGINAL
(6488)
With this function the original density coefficient determined at the factory are restored.
Options:
NO
YES
Factory setting:
NO
Function description
BASIC FUNCTION o PROCESS PARAMETER o ADJUSTMENT