Siemens SITRANS F M Intermag 2, Руководство по эксплуатации

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Operation
5-42
SITRANS FM Intermag 2 Flow Transmitter
Operating Manual - A5E00102775-03
Trim param. You have the following setting options in this menu:
menu item 6.7
S
Calibration factor , menu item 6.7.1
Due to the local hydraulic conditions, any error related to the full
scale value is corrected in this menu item. The value to be set here
corresponds to a multiplicator of the measured value.
An absolutely correctly set zero point is the prerequisite
for proper functioning.
S
CFH , menu item 6.7.2
This is a factory determined hydraulic calibration value at a flow of 1
m/s. It also serves to enter transmitter constants in sensors without
SmartPLUG.
S
ZPH , menu item 6.7.3
This is a factory determined hydraulic calibration value at a flow of 0
m/s. It also serves to enter transmitter constants in sensors without
SmartPLUG.
S
Excitation frequency , menu item 6.7.4
This setting option depends on the nominal width of the sensor or
the probes.
Nominal width Magnet frequency
DN 2 ... 100 mm 12 Hz / f/4
DN 125 ... 1.600 mm 6 Hz / f/8
DN >1600 mm 3 Hz / f/16
Probes S1, S2 12 Hz / f/4
two probes S 1 in series 3 Hz / f/16
two probes S 2 in series 6 Hz / f/8
Table 5-4 Magnet frequencies
S
Immersion check , menu item 6.7.5
The ”Tube empty” detection depends basically on the conductivity of
the medium. The switching threshold is set to a typical value.
Adjustment may be necessary in special cases.
Here you have to determine the current internal measured values
for electrodes 1 and 2 for a filled and empty measuring tube under
the menu items
’Act.Value El1’
and ’
Act.Value El2’
. The switching
threshold of the immersion check should be set under menu item
’Threshold’
to about midway between these two values.