7 Description of Instrument Functions Levelflex M FMP40 and FMP45
46 Endress+Hauser
7.3 Function group "length adjustment"
7.3.1 Function "probe length"
Use this function to select whether the probe length was changed after factory calibration. Only then
is it necessary to enter or correct the probe length.
Selection:
• modified
•not modified
!
Note!
If "modified" was selected in the "probe length" function, the probe length is defined in the next
step.
7.3.2 Function "probe length"
Use this function to enter the probe length.
7.4 Function group "extended calibr."
7.4.1 Function "echo quality"
The echo quality is the benchmark for measurement reliability. It describes the amount of reflected
energy and depends primarily on the following conditions:
• Dielectric constant of the medium
•probe type
• Distance between sensor and product
Low values increase the probability that the echo is lost through a change in measurement conditi-
ons, e.g. emulsion or high dampening of the upper product phase.
7.4.2 Function "offset"
This function corrects the measured level by a constant value. The entered value is added to the
measured level.