Endress+Hauser prowirl 77, Руководство по эксплуатации

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Function group: SENSOR DATA
Application Selects whether a liquid or a gas (or steam) is to be measured.
The nominal diameter and the setting selected here define the filter setting of
the preamplifier. A change of the fluid via this function is possible only if
DIP switch no. 10 at the device is set to “OFF” (see page 18).
Selection:
Liquid = flow measurement for liquids
Gas/steam = flow measurement for gas/steam
Factory setting: as ordered; if not specified by customer “Liquid” is set.
Nominal
diameter Selecting the nominal diameter of the flowmeter.
Caution!
Any alteration to the nominal diameter affects the entire measuring system and
is only required when replacing the flowmeter electronics. It is then necessary to
enter a new K-factor in function “Calibration factor” (see below).
Selection:
15 – 25 – 40 – 50 – 80 – 100 – 150 – 200 – 250 – 300
Factory setting:
dependent on the flowmeter
Calibration
factor The K-factor describes how many vortices per unit volume (1 dm
3
) occur in the
sensor. This value is determined in the factory by calibration and then printed
on the meter body.
Caution!
The K-factor should not be altered under normal circumstances.
Input:
Value range: 0.01...999.9 (Imp/dm
3
)
Factory setting: dependent on the flowmeter
Expansion
coefficient The temperature coefficient describes the effects of process temperature on the
calibration of the instrument. This coefficient is a function of the meter body and
is correctly adjusted in the factory. It must only be altered if a meter body made
of another material is mounted at a later date.
A setting in this function affects the displayed flow and the internal totalizer.
Any setting in this function affects measurement only if the value of the process
temperature is set to a different value than the factory setting.
Input:
Value range: 1.0 · 10
-5
...9.999
⋅
10
-5
/ Kelvin
Factory setting:
4.88 ·10
-5
/ K
for stainless steel A 351 CF3M (1.4404)
Caution!
Caution!
6 Device Functions Prowirl 77 PROFIBUS-PA
42 Hauser