Endress+Hauser Deltabar S FMD77, Руководство по эксплуатации

Страница: 66 / 114

Commissioning Deltabar S FMD77, FMD78, PMD75 with FOUNDATION Fieldbus
66 Hauser
POS. INPUT VALUE
Input Position adjustment – the pressure difference between zero (set point) and the
measured pressure need not be known. To correct the pressure difference, you
need a reference measurement value (e. g. from a reference device).
Example:
– MEASURED VALUE = 0.5 mbar (0.0073 psi)
– For the POS. INPUT VALUE parameter, specify the desired set point for the
MEASURED VALUE, e.g. 2.0 mbar (0.029 psi).
(The following applies: MEASURED VALUE
new
= POS. INPUT VALUE)
– MEASURED VALUE (after entry for POS. INPUT VALUE) = 2.0 mbar (0.029 psi)
– The CALIB. OFFSET parameter displays the resulting pressure difference (offset)
by which the MEASURED VALUE was corrected.
The following applies: CALIB. OFFSET = MEASURED VALUE
old
– POS. INPUT
VALUE,
here: CALIB. OFFSET= 0.5 mbar (0.0073 psi) – 2.0 mbar (0.029 psi) = – 1.5
mbar (0.022 psi)
Factory setting:
0.0
CALIB. OFFSET
Entry
Position adjustment – the pressure difference between zero (set point) and the
measured pressure is known. (A reference pressure is not present at the device.)
Example:
– MEASURED VALUE = 2.2 mbar (0.032 psi)
– Via the CALIB. OFFSET parameter, enter the value by which the MEASURED
VALUE should be corrected. To correct the MEASURED VALUE to 0.0 mbar, you
must enter the value 2.2 here.
(The following applies: MEASURED VALUE
new
= MEASURED VALUE
old
–
CALIB. OFFSET)
– MEASURED VALUE (after entry for calib. offset) = 0.0 mbar
Factory setting:
0.0
Parameter name Description