Siemens SITRANS P Betriebsanleitung PDF herunterladen (Seite 107)

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DV [x] Device variable x

L Level

m Mass

MA Start of scale value

ME Full scale value

P Pressure

V Volume

Figure 7-3 Functions of the "Level" block

Configure the "Output scaling, volume" with a unit from the volume range and the measuring

limits for the device variable "Volume". The characteristic curve output directly affects the

volume scaling input.

the calculation example, for the measuring limits from 0 and 100 l, a volume of 50 l is yielded

for process pressure of 1 bar.

The "Level" parameter setting also still automatically activates the device variable for the mass.

If you have not yet configured a value for the density, the initial value of 1 kg/l is preset. In the

calculation example for the "Mass" device variable, a mass of 250 kg is derived at a density

of 5 kg/l.

Note

When the density changes, the measuring range limits have to be adjusted accordingly.

You can configure all parameter settings for the "Level" block in SIMATIC PDM or the HART

communicator. Activate the "Level" measuring mode for this purpose. For all settings, the

measuring limits may be exceeded by +/-20%. Values which lie above or below that will be

rejected by the device.

Operating functions through HART

7.3 Selecting the measuring modes

SITRANS P, DS III series with HART

Operating Instructions, 09/2012, A5E00047092-08 105

1 2 ... 102 103 104 105 106 107 108 109 110 111 112 ... 233 234

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