22
WIKA Operating Instructions Level Transmitter
– BLM-SF-FM
4.2.2.13 Trim of measurement values
It is possible to adjust a measurement value if it deviates systematically
and reproducible from the set value. Therefore, a precisely defined pro-
cess condition has to be established. Then, it is entered in the trim menu.
Access:
Setup -> HART -> Trim
Example:
The transmitter shows a liquid level of 120 mm. By a fuel
level plunger, a true level of 125 mm is measured. The val-
ue for the correction is entered by Setup -> HART -> Trim ->
Level -> 125 mm. The transmitter now shows a liquid level
of 125 mm.
Remark:
A trim can be applied to liquid level, interface, electronics
temperature and absolute filling volume.
See also:
HART command 80, 81, 82 and 83.
Avail.:
Available since version 8.3.
0
20
40
60
80
100
0
20
40
60
80
100
M
e
a
s
u
re
d
v
a
lu
e
/
m
m
Set value / mm
Uncorrected
after Trim
