Parameterization
47
8.1.
Adjustments
The FMQ normally needs no calibration adjustment.
Usually, the zero point
adjustment (“
ZERO adjust
”) is carried out only during the first
commissioning.
If, however, some deviations have to be compensated for which were determined when
comparing with a calibration vessel or a balance it is possible to make an adjustment using the
“
m spe
” value.
However, before you will start carrying out an adjustment on the meter it is best to answer the
following questions first:
•
Are you sure that the reference standard (reference meter, balance, or calibrated vessel)
does really deliver an exactly comparative value?
•
Is there repeatability in the data that is being created,is the difference the same from
measurement to measurement?
Take into account that differently emptying pipelines, a missing break-off edge for the liquid
or temporary air occlusions will lead to faulty results during the measurement!
•
Is there a possibilty that any of the liquid being measured is not making it to the reference
either through a leak or diversion point?
•
Is the liquid clean and free of any air or gas?
•
Are the flow rate used within the limits of the meter?
•
Is the conductivity of the product within the required tolerance?
An adjustment is only reasonable if repeatable deviations have been measured during the
comparative measurements.
Adjustment by calibration factor "m spe"
The adjustment by the calibration factor “
m spe
” can be set using the optional display.
The factory set value is 1.0000
The calibration factor is calculated by means of the following formula:
V
ref
→
Target volume (e.g. calibration vessel, balance, or the like)
V
dis
→
FMQ display
Содержание FMQ
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