Vega VEGABAR 86 Operating Instructions Manual page 59

Ceramic measuring cell - Standard
Fig. 33: Basic temperature error F
The basic temperature error in % from the above graphic can increase due to the additional factors,
depending on the measuring cell version (factor FMZ) and the Turn Down (factor FTD). The ad-
ditional factors are listed in the following tables.
Additional factor through measuring cell version
Measuring cell
0.1 %
version
Factor FMZ 1
Additional factor through Turn Down
The additional factor FTD through Turn down is calculated according to the following formula:
F = 0.5 x TD + 0.5
TD
In the table, example values for typical Turn downs are listed.
Turn Down TD 1 : 1
Factor FTD 1
Long-term stability (according to DIN 16086)
Applies to the respective digital signal output (e.g. HART, Profibus PA) as well as to analogue cur-
rent output 4 ... 20 mA under reference conditions. Specifications refer to the set span. Turn down
(TD) is the ratio nominal measuring range/set span.
VEGABAR 86 • Foundation Fieldbus
at TD 1 : 1
TBasis
Measuring cell - Standard
0.1 % (with
measuring
range 25 mbar)
3
TD 2.5 : 1
1.75
Measuring cell climate-compensated, depending
on measuring range
5 bar, 10 bar, 1 bar, 2.5 bar
25 bar
1 2
TD 5 : 1 TD 10 : 1
3 5.5
11 Supplement
0.4 bar
3
TD 20 : 1
10.5
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